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REVIEWED BLD2021-1143+Manufacturer_Specifications_and_Installation_Instructions+8.18.2021_12.41.39_PM+2363492RECEIVED Aug 18 2021 CITY OF EDMONDS DEVELOPMENT SERVICES DEPARTMENT TRANEm Installation, Operation, and Maintenance Packaged Rooftop Air Conditioners Precedent T11 —Gas/Electric 3 to 10 Tons 60 Hz Model Numbers Model Numbers Model Numbers Model Numbers YSC036G - YSC060G YSC072H - YSC120H YHC036E - YHC072E YHC048F - YHC060F YHC072F - YHC102F YHC120F YHC037E - YHC067E REVIEWED BY CITY OF EDMONDS Only qualified personnel should install and service the equipment. The installation, starting up, and servicing of heating, ventilating, and air-conditioning equipment can be hazardous and requires specific knowledge and training. Improperly installed, adjusted or altered equipment by an unqualified person could result in death or serious injury. When working on the equipment, observe all precautions in the literature and on the tags, stickers, and labels that are attached to the equipment. March 2020 RT-SVX21AB-EN T � ^ N = TECH N 0 L 0 G I ES" 0 TRANE` Introduction Read this manual thoroughly before operating or servicing this unit. Warnings, Cautions, and Notices Safety advisories appear throughout this manual as required. Your personal safety and the proper operation of this machine depend upon the strict observance of these precautions. The three types of advisories are defined as follows Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury. Indicates a potentially hazardous situation which, if not avoided, could result in minor or moderate injury. It could also be used to alert against unsafe practices. Indicates a situation that could result in equipment or property -damage only accidents. Important Environmental Concerns Scientific research has shown that certain man-made chemicals can affect the earth's naturally occurring stratospheric ozone layer when released to the atmosphere. In particular, several of the identified chemicals that may affect the ozone layer are refrigerants that contain Chlorine, Fluorine and Carbon (CFCs) and those containing Hydrogen, Chlorine, Fluorine and Carbon (HCFCs). Not all refrigerants containing these compounds have the same potential impact to the environment. Trane advocates the responsible handling of all refrigerants -including industry replacements for CFCs and HCFCs such as saturated or unsaturated HFCs and HCFCs. Important Responsible Refrigerant Practices Trane believes that responsible refrigerant practices are important to the environment, our customers, and the air conditioning industry. All technicians who handle refrigerants must be certified according to local rules. For the USA, the Federal Clean AirAct (Section 608) sets forth the requirements for handling, reclaiming, recovering and recycling of certain refrigerants and the equipment that is used in these service procedures. In addition, some states or municipalities may have additional requirements that must also be adhered to for responsible management of refrigerants. Know the applicable laws and follow them. Proper Field Wiring and Grounding Required! Failure to follow code could result in death or serious injury. All field wiring MUST be performed by qualified personnel. Improperly installed and grounded field wiring poses FIRE and ELECTROCUTION hazards. To avoid these hazards, you MUST follow requirements for field wiring installation and grounding as described in NEC and your local/state electrical codes. Personal Protective Equipment (PPE) Required! Failure to wear proper PPE for the job being undertaken could result in death or serious injury. Technicians, in order to protect themselves from potential electrical, mechanical, and chemical hazards, MUST follow precautions in this manual and on the tags, stickers, and labels, as well as the instructions below: Before installing/servicing this unit, technicians MUST put on all PPE required for the work being undertaken (Examples; cut resistant gloves/sleeves, butyl gloves, safety glasses, hard hat/bump cap, fall protection, electrical PPE and arc flash clothing). ALWAYS refer to appropriate Material Safety Data Sheets (MSDS)/Safety Data Sheets (SDS) and OSHA guidelines for proper PPE. When working with or around hazardous chemicals, ALWAYS refer to the appropriate MSDS/SDS and OSHA/GHS (Global Harmonized System of Classification and Labelling of Chemicals) guidelines for information on allowable personal exposure levels, proper respiratory protection and handling instructions. If there is a risk of energized electrical contact, arc, or flash, technicians MUST put on all PPE in accordance with OSHA, NFPA 70E, or other country -specific requirements for arc flash protection, PRIOR to servicing the unit. NEVER PERFORM ANY SWITCHING, DISCONNECTING, OR VOLTAGE TESTING WITHOUT PROPER ELECTRICAL PPE AND ARC FLASH CLOTHING. ENSURE ELECTRICAL METERS AND EQUIPMENT ARE PROPERLY RATED FOR INTENDED VOLTAGE. © 2020 Trane RT-SVX21AB-EN aTRANE` Introduction Follow EHS Policies! Failure to follow instructions below could result in death or serious injury. • All Trane personnel must follow the company's Environmental, Health and Safety (EHS) policies when performing work such as hot work, electrical, fall protection, lockout/tagout, refrigerant handling, etc. Where local regulations are more stringent than these policies, those regulations supersede these policies. • Non-Trane personnel should always follow local regulations. Copyright This document and the information in it are the property of Trane, and may not be used or reproduced in whole or in part without written permission. Trane reserves the right to revisethis publication at anytime, and to make changes to its content without obligation to notify any person of such revision or change. Trademarks All trademarks referenced in this document are the trademarks of their respective owners. Factory Training Factorytraining is available through Trane UniversityT"" to help you learn more aboutthe operation and maintenance of your equipment. To learn about available training opportunities contact Trane UniversityT°". Online: www.trane.com/traneuniversity Phone: 855-803-3563 Email: traneuniversity@trane.com Revision History Updated Dimensions and Weights chapter tables. RT-SVX21AB-EN 0 TRANE` Table of Contents Model Number Descriptions -3 to 10 Tons (TN) 7 Model Number Descriptions - 3 to 5 Tons (TN - 17 Plus) ................................ 10 Model Number Notes ............... 11 General Information .................... 12 Unit Inspection ..................... 12 Storage ........................... 12 Unit Nameplate .................... 12 Compressor Nameplate .............. 12 Microchannel Coil Barcode ID ......... 12 Unit Description .................... 12 Economizer Control Actuator (Optional) 12 System Input Devices and Functions ... 13 Low Pressure Control ................ 14 High Pressure Control ............... 14 Power Exhaust Control (Optional) ..... 14 Lead/Lag Control (Dual Circuit Only) ... 14 Evaporator Frost Control ............. 15 Discharge Line Temp Switch (DLTS) ... 16 Smoke Detector Sensor (Optional) ..... 16 Phase Monitor ..................... 16 Single Zone Variable Air Volume / Displace- ment Ventilation (Optional) ........... 16 Human Interface - 5 Inch Color Touchscreen (Optional) ......................... 16 Pre -Installation ......................... 17 Dimensions and Weights ................ 18 Unit Clearances ...................... 18 Installation ............................. 27 Foundation .......................... 27 Horizontal Units .................... 27 Ductwork ............................ 27 Roof Curb ........................... 28 Downflow ......................... 28 Rigging ........................... 29 General Unit Requirements ............ 30 Factory Installed Economizer ......... 30 Temperature Limit Switch Usage for Gas Heat Units ..........................31 Horizontal Discharge Conversion (3 to 5 Ton Units)................................32 TC01 Instructions .....................32 Horizontal Discharge Conversion (6 to 10 Ton Units)................................33 TC01 Instructions .....................34 Unit Model Number ...................34 Return Air Smoke Detector .............34 Air-Fi® Wireless Communication Interface 35 Main Electrical Power Requirements .....36 Through -the -Base Gas Installation .......36 Requirements for Gas Heat .............37 Condensate Drain Configuration .........37 Filter Installation ......................38 Field Installed Power Wiring ............38 Main Unit Power ......................38 Standard Wiring .....................39 Optional TBUE Wiring (Through -the -Base Electrical Option) ....................39 Field -Installed Control Wiring ..........39 Control Power Transformer ...........40 Controls Using 24 Vac ................40 Controls using DC Analog Input/Outputs (Standard Low Voltage Multi conductor Wire) .....................40 DC Conductors ......................41 Space Temperature Averaging (ReliaTeITI On- ly)...................................45 Pre-Start................................48 Voltage Imbalance .....................48 Electrical Phasing (Three Phase Motors) ..48 Compressor Crankcase Heaters (Optional) 49 ReliaTelTM Controls ..................49 Test Modes ...........................50 ReliaTeIT°^ Controls ..................50 Electromechanical Controls Test Procedure ..........................50 Unit Start -Up ............................52 Sequence of Operation ...................52 4 RT-SVX21AB-EN ReliaTelT" Controls .................. 52 ReliaTeITI Controls - Constant Volume (CV) 52 ReliaTeITI Control Cooling without an Econo- mizer............................. 52 Three -Stages of Cooling ............. 52 ReliaTeITI Control Evaporator Fan Operation (for Gas Units) ..................... 52 ReliaTeIT°" Control Evaporator Fan Operation (for Cooling Only Units) .............. 53 Low Ambient Operation ............. 53 Multi -Speed Indoor Motor ............ 53 Fan Output% ....................... 53 Multi -Zone VAV Sequence of Operation . 53 Supply Air Pressure Control .......... 53 Supply Air Static Pressure Limit ....... 54 Supply Air Temperature Controls ...... 54 Supply Air Setpoint Reset ............ 54 Zone Temperature Control ........... 54 Variable Air Volume Applications (Single Zone VAV)........................... 55 Discharge Air Cool Setpoint Adjustment 55 ReliaTelTM Control Cooling with an Economiz- er................................ 55 ReliaTeIT`" Control Dehumidification ... 56 Dehumidification Coil Purge Cycle ..... 56 ReliaTelTM Control Cooling with an Economiz- er................................ 56 Economizer Set -Up ................. 57 ReliaTeIT"' Control Heating Operation (for Cooling Only Units) ................. 57 ReliaTeITM Control Heating Operation (for Gas Units) ............................. 57 Ignition Module .................... 57 Drain Pan Condensate Overflow Switch (Op- tional) ............................ 58 Electromechanical Controls ............ 58 Electromechanical Control Cooling without an Economizer ..................... 58 Electromechanical Control Evaporator Fan Operation (for Gas Units) ............ 58 Electromechanical Evaporator Fan Operation (for Cooling Only Units) .............. 58 Economizer Set -Up ................. 59 aTRANE` Table of Contents Electromechanical Control Cooling with an Economizer .........................59 Electromechanical Control Heating Operation (for Cooling Only Units) ...... • • • • • • ...59 Electromechanical Control Heating Operation (for Gas Units) ......................59 Ignition Module Low, Medium and High Heat 59 Drain Pan Condensate Overflow Switch (Op- tional) .............................60 Verifying Proper Air Flow ...............60 Units with 5-Tap Direct Drive Indoor Fan .60 Units with Belt Drive Indoor Fan ........60 Units with Direct Drive Indoor Fan - Electro- mechanical Control ..................61 ReliaTeITI Units with Direct Drive Indoor Fan 61 Units with Constant CFM Direct Drive Indoor Fan................................62 17 Plus units with the constant CFM direct drive indoor fan .....................63 Variable Air Volume Applications (Traditional VAV)..............................63 Supply Duct Static Pressure Control ....64 Traditional VAV Standalone Operation ..64 Supply Air Temperature Reset .........64 Return Air Smoke Detector ............65 Economizer Start -Up .................65 Compressor Start -Up .................66 Dehumidification Option ..............66 Gas Heat Units ......................66 Final System Setup ..................67 Maintenance ............................68 Fan Belt Adjustment - Belt Drive Units ....68 Monthly Maintenance ..................69 Filters..............................69 Return Air Smoke Detector Maintenance 69 Condensate Overflow Switch ..........69 Cooling Season .....................69 Heating Season .....................69 Coil Cleaning .......................70 Annual Maintenance ...................71 Troubleshooting .........................72 RT-SVX21AB-EN 5 aTRANE` Table of Contents ReliaTelTI Control .................... 72 System Status Checkout Procedure ..... 72 Method 1 .......................... 72 Resetting Cooling and Ignition Lockouts 74 Zone Temperature Sensor (ZTS) Service Indi- cator ................................ 74 Clogged Filter Switch ................ 74 Fan Failure Switch .................. 74 Condensate Overflow Switch ......... 74 Zone Temperature Sensor (ZTS) Tests .. 74 Test 1 - Zone Temperature Thermistor (ZTEMP) ........................... 74 Test 2 - Cooling Set Point (CSP) and Heating Set Point (HSP) ..................... 74 Test 3 - System Mode and Fan Selection 74 Test 4 - LED Indicator Test, (SYS ON, HEAT, COOL and SERVICE) ................. 75 Relative Humidity Sensor Test ........ 75 Programmable and Digital Zone Sensor Test.............................. 75 ReliaTeIT" Refrigeration Module (RTRM) De- fault Chart ......................... 75 Unit Operation without a Zone Sensor .. 75 Unit Economizer Control (ECA) Troubleshoot- ing.................................. 75 ReliaTeIT°^ Control .................. 75 Electromechanical Control ........... 76 Unit Economizer Control (ECA) Test Proce- dures ............................... 78 Electromechanical Control ........... 78 Troubleshooting procedures for Direct Drive Plenum Fan .......................... 78 Wiring Diagrams ....................... 79 Limited Warranty ....................... 82 Combination Gas Electric Air Conditioner 82 YCD, YCH, YSC and YHC (Parts Only) .. 82 Models Less Than 20 Tons for Commercial Use* .............................. 82 6 RT-SVX21AB-EN 0 TRANE` Model Number Descriptions - 3 to 10 Tons (T/Y) Digit 1 — Unit Type T = DX Cooling Y = DX Cooling, Gas Heat Digit 2 — Efficiency S = Standard Efficiency H = High Efficiency Digit 3 — Airflow C = Convertible Digit 4,5,6 — Nominal Gross Cooling Capacity (MBh) 036 = 3 Ton 048 = 4 Ton 060 = 5 Ton 072=6Ton 074 = 6 Ton, Dual Compressor 090 = 7.5 Ton, Single Compressor 092 = 7.5 Ton, Dual Compressor 102 = 8.5 Ton 120=10Ton Digit 7 — Major Design Sequence Digit 8 — Voltage Selection 1 = 208/230/60/1 3 = 208-230/60/3 4 = 460/60/3 W = 575/60/3 Digit 9 — Unit Controls E = Electromechanical R = ReliaTeIT"" Microprocessor Digit 10 — Heating Note: Applicable to Digit 1, T models only. 0 = No Electric Heat A = 5 kW (1 phase)2 B = 6 kW (3 phase) C = 9 kW (3 phase) D = 10 kW (1 phase)2 E = 12 kW (3 phase) F = 14 kW (1 phase)2 G = 18 kW (1 and 3 phase) J = 23 kW (3 phase) K = 27 kW (3 phase) N = 36 kW (3 phase) P = 54 kW (3 phase) Note: Applicable to Digit 1, Y models only. L = Low Heat M = Medium Heat H = High Heat X = Low Heat, Stainless Steel Heat Exchanger Y= Medium Heat, Stainless Steel Heat Exchanger Z = High Heat, Stainless Steel Heat Exchanger Digit 11 — Minor Design Sequence A = First Sequence3 B = Second Sequence4 Digit 12, 13 — Service Sequence ** = Factory Assigned Digit 14 — Fresh Air Selection 0 = No Fresh Air A = Manual Outside Air Damper 0-50%5 B = Motorized Outside Air Damper 0-50%6 C = Economizer, Dry Bulb 0-100% without Barometric Relief7 D = Economizer, Dry Bulb 0-100% with Barometric Relief7 E = Economizer, Reference Enthalpy 0-100% without Barometric Relief7,8 F = Economizer, Reference Enthalpy 0-100% with Barometric Relief7,8 G = Economizer, Comparative Enthalpy 0-100% without Barometric Relief7,8 H = Economizer, Comparative Enthalpy 0-100% with Barometric Relief7,8 K = Low Leak Economizer with Barometric Relief M = Low Leak Economizer with Barometric Relief P = Low Leak Economizer with Comparative Enthalpy with Barometric Relief Digit 15 — Supply Fan/Drive Type/Motor 0 = Standard Drive9 1 = Oversized Motor 2 = Optional Belt Drive Motorio 6 = Single Zone VAV11,12 7 = Multi -Speed Indoor Fan13 E = VAV Supply Air Temperature Controls Standard Motor12 Digit 16 — Hinged Service Access/Filters 0 = Standard Panels/Standard Filters A = Hinged Access Panels/Standard Filters B = Standard Panels/2" MERV 8 Filters C = Hinged Access Panels/2" MERV 8 Filters D = Standard Panels/2" MERV 13 Filters E = Hinged Access Panels/2" MERV 8 Filters Digit 17 — Condenser Coil Protection 0 = Standard Coil 1 = Standard Coil with Hail Guard 2 = Black Epoxy Coil Pre -Coated Condenser Coil13 3 = Black Epoxy Coil Pre -Coated Condenser Coil with Hail Guard14 4 = CompleteCoat' with Condenser Coil 5 = CompleteCoat' with Hail Guard Digit 18 — Through -the -Base Provisions Note: Applicable to Digit 1, T or Y models only. 0 = No Through -the -Base Provisions A = Through -the -Base Electric15 Note: Applicable to Digit 1, Y models only. B = Through -the -Base Gas Piping16 C = Through -the -Base Electric and Gas Pipingl6 Digit 19 — Disconnect/Circuit Breaker (three-phase only) 0 = No Disconnect/No Circuit Breaker 1 = Unit Mounted/Non-Fused Disconnect15 2 = Unit Mounted Circuit Breaker15 Digit 20 — Convenience Outlet 0 = No Convenience Outlet A = Unpowered Convenience Outlet B = Powered Convenience Outlet (three-phase only)17 Digit 21 — Communications Options$ 0 = No Communications Interface 1 = Trane® Communications Interface 2 = LonTalk® Communications Interface 3 = Novar 2024 Controls18 4 = Novar 3051 Controls without Zone Sensor18 5 = Novar 3051 Controls Interface with DCV18 6 = BACnetOO Communications Interface 7 = Trane® Air-Fi® Communications Interface19 Digit 22 — Refrigeration System Option 0 = Standard Refrigeration System20 B = Dehumidification Option21,22 Digit 23 — Refrigeration Controls Note: Applicable to Digit 7 = E, F, G,H. 0 = No Refrigeration Contro123 1 = FrostatTM 24,25 Digit 24 — Smoke Detector26 0 = No Smoke Detector A = Return Air Smoke Detector27.28 B = Supply Air Smoke Detector C = Supply and Return Air Smoke Detectors27,28 D = Plenum Smoke Detector Digit 25 — System Monitoring Controls 0 = No Monitoring Contro129 1 = Clogged Filter Switch29 2 = Fan Filter Switch29 3 = Discharge Air Sensing Tube29 4 = Clogged Filter Switch and Fan Filter Switch29 5 = Clogged Filter Switch and Discharge Air Sensing Tube29 6 = Fan Failure Switch and Discharge Air RT-SVX21 AB-E N aTRANE` Model Number Descriptions - 3 to 10 Tons (T/Y) Sensing Tube29 7 = Clogged Filter Switch, Fan Failure Switch and Discharge Air Sensing Tube29 8 = Novar Return Air Sensor (NOVAR 2024)30,18 9 = Novar Zone Temp Sensor (NOVAR 3051)31,18 A = Condensate Drain Pan Overflow Switch) B = Clogged Filter Switch29 and Condensate Drain Pan Overflow Switch C = Fan Failure Switch29 and Condensate Drain Pan Switch D = Discharge Air Sensing29 and Condensate Overflow Switch E = Clogged Filter Switch29, Fan Failure Switch and Condensate Drain Pan Overflow Switch F = Clogged Filter Switch29, Discharge Air Sensing Tube29 and Condensate Drain Pan Overflow Switch G = Fan Failure Switch, Discharge Air Sensing Tube29 and Condensate Drain Pan Overflow Switch H = Clogged Filter Switch29, Fan Failure Switch29, Discharge Air Sensing29 and Condensate Drain Pan Overflow Switch Digit 26 - System Monitoring Controls 0 = No Monitoring Control A = Demand Control Ventilation (CO2)32,33 B = Low Leak Economizer with FDD (Fault Detection and Diagnostics) C = FDD (Fault Detection and Diagnostics) with DCV (Demand Control Ventilation) Digit 27 - Unit Hardware Enhancements 0 = No Enhancements 1 = Stainless Steel Drain Pan Digit 31 - Advanced Unit Controls 0 = Standard Unit Controls 1 = Human Interface Model Number Notes 1. Standard on T/YSC 6, 7.5 (single and dual systems), 8.5, 10 ton standard efficiency models and T/ YHC 4, 5, 6, 7.5, 8.5, 10 ton MCHE high efficiency models (except for 4, 5, 6 ton dehumidification models). 2. Available on 3 to 5 ton models. 3. Available for all models except gas/electric, 3 to 5 tons high efficiency, single phase. 4. Available for gas/electric, 3 to 5 tons, high efficiency, single phase models. 5. Manual outside air damper will ship factory supplied within the unit, but must be field installed. 6. Motorized outside air damper is not available on multi -speed or SZVAV (single zone variable air volume) products. 7. Economizer with barometric relief is for downflow configured units only. Order economizer without barometric relief for horizontal configuration. Barometric relief for horizontal configured units must be ordered as field installed accessory. 8. Not available with electromechanical controls. Multi -speed, direct drive motor with no belt drive option is standard on 3 to 5 ton, standard efficiency, 14 SEER units. Multi - speed, direct drive motor with a belt drive option is available for 3 to 5 ton,15 SEER units. On 6 to 10 tons, multispeed direct drive is standard on all 10 ton and 6 (074) to 8.5 ton high efficiency. Belt drive is standard on all other units. Table 1, p. 9. 10. Reference Table 1, p. 9. 11. Single zone VAV is only available on 6to 10tons high efficiency and 7.5 to 10 ton standard efficiency products with ReliaTeITM controls. 12. Discharge air sensing is also standard equipment on units with single zone and supply air temperature control VAV. 13. Multi -speed indoor fan available only on 6, 7.5 and 8.5 tons high efficiency, and 7.5 to 10 ton products with ReliaTeITM controls. 14. Epoxy coil and epoxy with hail guard options are not available for units with microchannel condenser coil. 15. Through -the -base electric required when ordering disconnect/circuit breaker options. 16. Includes gas piping and shutoff (field assembly required). 17. Requires use of disconnect or circuit breaker. Reference Table 1, p. 9. 18. Novar is not available with SZVAV products. 19. MustbeusedwithBACnet®open protocol. 20. Standard metering devices are TXVs. 21. Requires selection of 2" pleated filters (option B or C) for Digit 16. 22. Not available on all single phase or standard efficiency. 23. High pressure control is standard on all units. 24. FrostatT°^ cannot be field installed in electro-mechanical units. 25. FrostatTM standard on Y/TSC036 to 060G and TNSC090H electromechanical, multi -speed and SZVAV (single zone variable air volume) products. 26. Not available with high temperature duct sensor accessory. 27. The return air smoke detector may not fit up o r work properly on the PrecedentTl units when used in conjunction with 3rd party accessories such as bolt on heat wheels, economizers and power exhaust. Do not order the return air smoke detectors when using this type of accessory. 28. Return air smoke detector cannot be ordered with Novar controls. 29. These options are standard when ordering Novar controls. 30. This option is used when ordering Novar controls. 31. Novar sensor utilized with Digit 21 = (4) Novar 3051 controls without zone sensor. 32. Demand control ventilation not available with electromechanical controls. 33. Demand control ventilation option includes wiring only. The CO2 sensor is a field -installed only option. 8 RT-SVX21AB-EN qWTRANE Model Number Descriptions - 3 to 10 Tons (T/Y) Table 1. Digit 15 Selection Details Digit 15 = 0 Standard Efficiency 3 Phase (3 to 5 Ton) = Multispeed Direct Drive Motor 3 Phase 6 to 8.5 Ton = Bet Drive 3 Phase (10 Ton) = Ultra High Efficiency Direct Drive Plenum Fan High Efficiency 1 Phase = High Efficiency Multispeed Direct Drive Motor 3 Phase (3 to 5 ton) = High Efficiency Multispeed Direct Drive Motor 3 Phase 3 to 5 ton w De umi i ication = Belt Drive Motor 3 Phase 6 074 to 10 ton = Ultra High Efficiency Direct Drive Plenum Fan Digit 15 = 2 Standard Efficiency 3 Phase = Not Available High Efficiency 1 Phase = Not Available 3 Phase 3 to 5 tons = May be Ordered 3 Phase (3 to 5 tons w/dehumidification) = Not Available 3 Phase 6 to 10 tons = Not Available Table 2. Not Available in Model Number Standard Efficiency 3 to 5 Tons and 10 Ton w 575V High Efficiency 3 to 5 Tons w/Standard Indoor Motor w 460V High Efficiency 575V RT-SVX21 AB-E N aTRANE` Model Number Descriptions - 3 to 5 Tons (T/Y - 17 Plus) Model Number Descriptions - 3 to 5 Tons (T/Y - 17 Plus) Digit 1 — Unit Type T= DX Cooling Y = DX Cooling, Gas Heat Digit 2 — Efficiency S = Standard Efficiency H = High Efficiency Digit 3 — Airflow C = Convertible Digit 4,5,6 — Nominal Gross Cooling Capacity (MBh) 037 = 3 Ton 047 = 4 Ton 067 = 5 Ton Digit 7 — Major Design Sequence E = R-410A Refrigerant Digit 8 — Voltage Selection 3 = 208-230/60/3 4 = 460/60/3 W = 575/60/3 Digit 9 — Unit Controls R = ReliaTeIT°" Microprocessor Digit 10 — Heating Capacity Note: Applicable to Digit 1, T models only 0 = No Electric Heat B = 6 kW (3 phase) E = 12 kW (3 phase) G = 18 kW (1 and 3 phase) J = 23 kW (3 phase) Note: Applicable to Digit 1, Y models only L = Low Heat M = Medium Heat H = High Heat X = Low Heat, Stainless Steel Heat Exchanger Y= Medium Heat, Stainless Steel Heat Exchanger Z = High Heat, Stainless Steel Heat Exchanger Digit 11 — Minor Design Sequence A = First Sequence15 Digit 12,13 — Service Sequence ** = Factory Assigned Digit 14 — Fresh Air Selection 0 = No Fresh Air A = Manual Outside Air Damper 0-50%1 B = Motorized Outside Air Damper 0-50% C = Economizer, Dry Bulb 0-100% without Barometric Relief4 D = Economizer, Dry Bulb 0-100% with Barometric Relief4 E = Economizer, Reference Enthalpy 0-100% without Barometric Relief4 F = Economizer, Reference Enthalpy 0-100%with Barometric Relief4 G = Economizer, Comparative Enthalpy 0-100% without Barometric Relief4 H = Economizer, Comparative Enthalpy 0-100%with Barometric Relief4 K = Low Leak Economizer with Barometric Relief M = Low Leak Economizer with Reference Enthalpy with Barometric Relief P = Low Leak Economizer with Comparative Enthalpy with Barometric Relief Digit 15 — Supply Fan/Drive Type/Motor 0 = Standard Drive3 6 = Single Zone VAV20 E = VAV Supply Air Temperature Control Standard Motor20 Digit 16 — Hinged Service Access/Filters 0 = Standard Panels/Standard Filters A = Hinged Access Panels/Standard Filters B = Standard Panels/2" MERV 8 Filters C = Hinged Access Panels/2" MERV 8 Filters D = Standard Panels/2" MERV 13 Filters E = Hinged Access Panels/2" MERV 1 Filters Digit 17 — Condenser Coil Protection 0 = Standard Coil 1 = Standard Coil with Hail Guard 2 = Black Epoxy Pre -Coated Condenser Coil 3 = Black Epoxy Pre -Coated Condenser Coil with Hail Guard 4 = CompleteCoat'' Condenser Coil 5 = CompleteCoat'' Condenser Coil with Hail Guard Digit 18 — Through the Base Provisions 0 = No Through -the -Base Provisions A = Through -the -Base Electric5 B = Through -the -Base Gas Piping12 C = Through -the -Base Electric and Gas Piping12 Digit 19 — Disconnect/Circuit Breaker (three-phase only) 0 = No Disconnect/No Circuit Breaker 1 = Unit Mounted Non -Fused Disconnects 2 = Unit Mounted Circuit Breakers Digit 20 — Convenience Outlet 0 = No Convenience Outlet A = Unpowered Convenience Outlet B = Powered Convenience Outlet (three-phase only)6 Digit 21 — Communications Options 0 = No Communications Interface 3 = Novar 2024 Controls 4 = Novar 3051 Controls without Zone Sensor 5 = Novar 3051Controls Interface with DCV Digit 22 — Refrigeration System Option 0 = Standard Refrigeration System? B = Dehumidification Option16 Digit 23 — Refrigeration Controls Note: Applicable to Digit 7 = E 0 = No Refrigeration Contro12 1 = Frostat'" Digit 24 — Smoke Detector13 0 = No Smoke Detector A = Return Air Smoke Detector8.9 B = Supply Air Smoke Detector C = Supply and Return Air Smoke Detectors8,9 D = Plenum Smoke Detector Digit 25 — System Monitoring Controls 0 = No Monitoring ControI10 1 = Clogged Filter Switch10 2 = Fan Failure Switch" 3 = Discharge Air Sensing Tubelo 4 = Clogged Filter Switch and Fan Failure Switch10 5 = Clogged Filter Switch and Discharge Air Sensing Tube10 6 = Fan Failure Switch and Discharge Air Sensing Tubelo 7 = Clogged Filter Switch, Fan Failure Switch and Discharge Air Sensing Tubelo 8 = Novar Return Air Sensor (NOVAR 2024)11,19 9 = Novar Zone Temp Sensor (NOVAR 3051)14,19 10 RT-SVX21AB-EN Model Number Descriptions - 3 to 5 Tons (T/Y - 17 Plus) A = Condensate Drain Pan Overflow Switch B = Clogged Filter Switch10 and Condensate Drain Pan Overflow Switch C = Fan Failure Switch10 and Condensate Drain Pan Overflow Switch D = Discharge Air Sensing10 and Condensate Drain Pan Overflow Switch E = Clogged Filter Switch10, Fan Failure Switch10 and Condensate Drain Pan Overflow Switch F = Clogged Filter Switch10, Discharge Air Sensing Tubelo and Condensate Drain Pan Overflow Switch G = Fan Failure Switch10, Discharge Air Sensing Tube10 and Condensate Drain Pan Overflow Switch H = Clogged Filter Switch10, Fan Failure Switch10, Discharge Air Sensing10 and Condensate Drain Pan Overflow Switch Digit 26 — System Monitoring Controls 0 = No Monitoring Controls A = Demand Control Ventilation (COW7,18 B = Low Leak Economizer with FDD (Fault Detection and Diagnostics) C = FDD (Fault Detection and Diagnostics with DCV (Demand Control Ventilation) Digit 27 — Unit Hardware Enhancements 0 = No Enhancements 1 = Stainless Steel Drain Pan Digit 31 — Advanced Unit Controls 0 = Standard Unit Controls 1 = Human Interface Model Number Notes 1. Manual outside air damper will ship factory supplied within the unit, but must be field installed. 2. High pressure control is standard on all units. 3. Direct drive is standard for 3 to 5 ton variable stage units. Digit 15=0,6 3 Phase (3-5 ton) - High Efficiency Constant CFM 4. Economizer with Barometric Relief is for downflow configured units only. Order Economizer without Barometric Relief for horizontal configuration. Barometric Relief for horizontal configured units must be ordered as field installed accessory. 5. Through the base electric required when ordering disconnect/circuit breaker options. 6. Requires use of Disconnect or Circuit Breaker. Not Available High Efficiency 3 to 5 ton w/Standard Indoor Motor w/460V or 575V 7. Standard metering devices are TXVs. 8. The return air smoke detector may notfit up or work properly on the Precedent units when used in conjunction with 3rd party accessories such as bolt on heat wheels, economizers and power exhaust. Do not order the return air smoke detectors when using this type of accessory. 9. Return Air Smoke Detector cannot be ordered with Novar Controls. 10. These options are standard when ordering Novar Controls. 11. This option is used when ordering Novar Controls. 12. Includes gas piping and shutoff (field assembly required). 13. Not available with high temperature duct sensor accessory. 14. Novar Sensor utilized with Digit21 =(4) Novar3051 Controls without Zone Sensor. 15. Available for T/Y 3,4,5 ton high efficiency models. 16. Requires selection of 2" Pleated Filters (option B or C) for Digit 16. 17. Demand Control Ventilation not available with electromechanical controls. 18. Demand Control Ventilation Option includes wiring only. The CO2 sensor is a field -installed only option. 19. Novar is not available with SZVAV products. 20. Discharge Air Sensing is also standard equipment on units with Single Zone and Supply Air Temperature Control VAV. aTRANE` RT-SVX21 AB-E N 11 0 TRANE` General Information Unit Inspection As soon as the unit arrives at the job site • Verifythatthe nameplate data matches the data on the sales order and bill of lading (including electrical data). • Verify that the power supply complies with the unit nameplate specifications. • Visually inspect the exterior of the unit, including the roof, for signs of shipping damage. If the job site inspection of the unit reveals damage or material shortages, file a claim with the carrier immediately. Specify the type and extent of the damage on the "bill of lading" before signing. • Visually inspect the internal components for shipping damage as soon as possible after delivery and before it is stored. Do not walk on the sheet metal base pans. • If concealed damage is discovered, notify the carrier's terminal of damage immediately by phone and by mail. Concealed damage must be reported within 15 days. • Request an immediate joint inspection of the damage by the carrier and the consignee. Do not remove damaged material from the receiving location. Take photos of the damage, if possible. The owner must provide reasonable evidence that the damage did not occur after delivery. • Notify the appropriate sales representative before installing or repairing a damaged unit. Storage Take precautions to prevent condensate from forming inside the unit's electrical compartments and motors if: 1. the unit is stored before it is installed; or, 2. the unit is set on the roof curb, and temporary heat is provided in the building. Isolate all side panel service entrances and base pan openings (e.g., conduit holes, Supply Air and Return Air openings, and flue openings) from the ambient air until the unit is ready for start-up. Note: Do not use the unit's heater for temporary heat without first completing the start-up procedure detailed under "Unit Start -Up," p. 52". The manufacturer will not assume any responsibility for equipment damage resulting from condensate accumulation on the unit's electrical and/or mechanical components. Unit Nameplate A Mylar unit nameplate is located on the unit's corner support next to the filter access panel. It includes the unit model number, serial number, electrical characteristics, refrigerant charge, as well as other pertinent unit data. Compressor Nameplate The nameplateforthe compressors are located on the side of the compressor. Microchannel Coil Barcode ID Barcode decal used for coil part identification can be located on the header and top of coil's inlet/outlet side. Unit Description Before shipment, each unit is leak tested, dehydrated, charged with refrigerant and compressor oil, and run tested for proper control operation. The condenser coils are either aluminum fin, mechanically bonded to copper tubing or all aluminum microchannel. Direct -drive, vertical discharge condenser fans are provided with built-in thermal overload protection. There are two control systems offered for these units. The electromechanical control option uses a thermostat to perform unitfunctions. The ReliaTeIT°^ Control Module is a microelectronic control system that is referred to as "Refrigeration Module" (RTRM). The acronym RTRM is used extensively throughout this document when referring to the control system network. These modules through Proportional/Integral control algorithms perform specific unit functions that governs unitoperation in responseto;zone temperature, supply air temperature, and/or humidity conditions depending on the application. The stages of capacity control for these units are achieved by starting and stopping the compressors. The RTRM is mounted in the control panel and is factory wired to the respective internal components. The RTRM receives and interprets information from other unit modules, sensors, remote panels, and customer binary contacts to satisfy the applicable request for cooling. Economizer Control Actuator (Optional) Electromechanical Control The ECA monitors the mixed airtemperature, ambient dry bulb temperature and local minimum position setpoint sensors, if selected, to control dampers to an accuracy of +/- 5% of stroke. The actuator is spring returned to the closed position any time that power is lost to the unit. It is capable of delivering up to 25 inch pounds of torque and is powered by 24 Vac. ReliaTell" Control The ECA monitors the mixed air temperature, return air temperature, minimum position setpoint (local or remote), power exhaust setpoint, CO2 setpoint, CO2, and ambient dry bulb/enthalpy sensor or comparative humidity (return air humidity against ambient humidity) sensors, if selected, to control dampers to an accuracy of 12 RT-SVX21AB-EN +/- 5% of stroke. The actuator is spring returned to the closed position any time that power is lost to the unit. It is capable of delivering up to 25 inch pounds of torque and is powered by 24 Vac. RTCI - ReliaTelT"^ Trane Communication Interface (Optional) This module is used when the application calls for an ICSTM building management type control system. It allows the control and monitoring of the system through an ICS panel. The module can be ordered from the factory or ordered as a kit to be field installed. Follow the installation instruction that ships with each kit when field installation is necessary. RLCI - ReliaTelT" LonTalk Communication Interface (Optional) This module is used when the application calls for an ICSTM building management type control system that is LonTalk. It allowsthe control and monitoring of the system through an ICS panel. The module can be ordered from the factory or ordered as a kit to be field installed. Follow the installation instruction that ships with each kit when field installation is necessary. RBCI - ReliaTelT"' BACnet Communications Interface (Optional) This module is used when the application calls for an open BACnet protocol. It allows the control and monitoring of the system through an ICS panel. The module can be ordered from the factory or as a kit to be field installed. Followthe installation instructions that ships with each kit when field installation is necessary. RTOM - ReliaTelTM Options Module (Standard on 17 Plus, 6Ton (074), 7.5 Ton and 8.5 Ton High Efficiency with ReliaTel, 10 Ton with ReliaTel) The RTOM monitorsthe supply fan proving, clogged filter, supply air temperature, exhaust fan setpoint, supply air tempering, FrostatTM , smoke detector, and Variable Speed Fan Control (17 Plus units only). Refer to system input devices and functions for operation. System Input Devices and Functions The RTRM must have a zone sensor or thermostat input in order to operate the unit. The flexibility of having several mode capabilities depends upon the type of zone sensor or thermostat selected to interface with the RTRM. The descriptions of the following basic Input Devices used within the RTRM network areto acquaintthe operatorwith their function as they interface with the various modules. Refer to the unit's electrical schematic for the specific module connections. The following controls are available from the factory for field installation. aTRANE` General Information Supply Fan Failure Input (Optional) The Fan Failure Switch can be connected to sense indoor fan operation: FFS (Fan Failure Switch) If air flow through the unit is not proven by the differential pressure switch connected to the RTOM (factory set point 0.07 "w.c.) within 40 seconds nominally, the RTRM will shut off all mechanical operations, lock the system out, send a diagnostic to ICS, and the SERVICE output will flash. The system will remain locked out until a reset is initiated either manually or through ICS. Clogged Filter Switch (Optional) The unit mounted clogged filter switch monitors the pressure differential across the return air filters. It is mounted in the filter section and is connected to the RTOM. A diagnostic SERVICE signal is sent to the remote panel if the pressure differential acrossthe filters is at least 0.5" w.c. The contacts will automatically open when the pressure differential across the filters decreases to approximately 0.4" w.c. The clogged filter output is energized when the supply fan is operating and the clogged filter switch has been closed for at least 2 minutes. The system will continue to operate regardless of the status of the filter switch. Note: On units equipped with factory installed MERV 13 filters, a clogged filter switch with different pressure settings will be installed. This switch will close when the differential pressure is approximately 0.8' w.c. and open when the differential falls to 0.7" w.c. Condensate Drain Pan Overflow Switch (Optional) ReliaTelT"" Option This input incorporates the Condensate Overflow Switch (COF) mounted on the drain pan and the ReliaTel Options Module (RTOM). When the condensate level reaches the trip point for 6 continuous seconds, the RTOM will shut down all unit functions until the overflow condition has cleared. The unit will return to normal operation after 6 continuous seconds with the COF in a non -tripped condition. If the condensate level causes unit shutdown more than 2 times in a 3 days period, the unit will be locked -out of operation requiring manual reset of diagnostic system through Zone Sensor or Building Automation System (BAS). Cycling unit power will also clear the fault. Electromechanical Option This input incorporates the condensate overflow switch (COF), COF Relay, COF Time Delay. When the condensate level reaches the trip point, the COF relay energizes and opens the 24 Vac control circuit which disables the unit. Oncethe 24 Vac control circuit is opened, a delaytimerwill prevent unit start-up for three minutes. RT-SVX21 AB-E N 13 aTRANE` General Information Compressor Disable (CPR1/2) This input incorporates the low pressure control (LPC) of each refrigeration circuit and can be activated by opening a field supplied contact installed on the LTB. If this circuit is open before the compressor is started, the compressor will not be allowed to operate. Anytime this circuit is opened for 1 continuous second during compressor operation, the compressor for that circuit is immediately turned "Off". The compressor will not be allowed to restart for a minimum of 3 minutes should the contacts close. If four consecutive open conditions occur during the first three minutes of operation, the compressor forthat circuit will be locked out, a diagnostic communicated to the remote panel (if installed), and a manual reset will be required to restart the compressor. Low Pressure Control ReliaTelT"^ Control When the LPC is opened for 1 continuous second, the compressor for that circuit is turned off immediately. The compressor will not be allowed to restart for a minimum of 3 minutes. If four consecutive open conditions occur during an active call for cooling, the compressor will be locked out, a diagnostic communicated to ICST"", if applicable, and a manual reset required to restart the compressor. On dual compressor units only the affected compressor circuit is locked out. Electromechanical Control When the LPC is opened, the compressor forthat circuit is turned off immediately. The compressor will restart when the LPC closes. High Pressure Control ReliaTelT"" Control The high pressure controls are wired in series between the compressor outputs on the RTRM and the compressor contactor coils. If the high pressure control switch opens, the RTRM senses a lack of current while calling for cooling and locks the compressor out. If four consecutive open conditions occur during an active call for cooling, the compressor will be locked out, a diagnostic communicated to ICSTM, if applicable, and a manual reset required to restart the compressor. On dual compressor units only the affected compressor circuit is locked out. Electromechanical Control When the HPC is opened, the compressor for that circuit is turned off immediately. The compressor will restart when the HPC closes. Power Exhaust Control (Optional) ReliaTeIT"" Control The powerexhaustfan is started wheneverthe position of the economizer dampers meets or exceed the power exhaust setpoint when the indoor fan is on. With the optional ventilation override accessory, the power exhaust fan is independent of the indoor fan. The setpoint panel is located in the return air section and is factory set at 25%. Electromechanical Control The power exhaust fan is started whenever the indoor fan is on and the adjustable damper limit switch DLS is closed. Lead/Lag Control (Dual Circuit Only) ReliaTelT"" Control Only Lead/Lag is a selectable input located on the RTRM. The RTRM is configured from the factory with the Lead/Lag control disabled. To activatethe Lead/Lag function, simply cut the wire connected to J3-8 at the RTRM. When it is activated, each time the designated lead compressor is shut off due to the load being satisfied, the lead compressor or refrigeration circuit switches. When the RTRM is powered up, i.e. after a power failure, the control will default to the number one circuit compressor. Lead/ Lag is not available on Multi -Speed Indoor Fan, or Single Zone Variable Air Volume (SZVAV) products. Zone Sensor Module (ZSM) (BAYSENS106*) This electronic sensor features three system switch settings (Heat, Cool, and Off) and two fan settings (On and Auto). It is a manual changeover control with single setpoint. (Cooling Setpoint Only) Zone Sensor Module (ZSM) (BAYSENS108* This electronic sensor features four system switch settings (Heat, Cool, Auto, and Off) and two fan settings (On and Auto). It is a manual or auto changeover control with dual setpoint capability. It can be used with a remote zone temperature sensor BAYSENS077*. Zone Sensor (BAYSENS110*) This electronic sensor features four system switch settings (Heat, Cool, Auto, and Off) and two fan settings (On and Auto) with four system status LED's. It is a manual or auto changeover control with dual setpoint capability. It can be used with a remote zone temperature sensor BAYS E N S077 *. Wall Mounted Relative Humidity Sensor (BAYSENS036*) Field installed, wall mounted humidity sensor is used to control activation of Enhanced Dehumidification and the Hot Gas Reheat Dehumidification options. Humidity set points can be selected for relative humidity levels between 14 RT-SVX21AB-EN 40% and 60% by adjusting the DEHUMID setting on the ReliaTel Options Module. See Figure 60, p. 41. Duct Mounted Relative Humidity Sensor (BAYSENS037*) Field installed, duct mounted humidity sensor is used to control activation of Enhanced Dehumidification and the hot gas reheat dehumidification options. Humidity set points can be selected for relative humidity levels between 40% and 60% by adjusting the DEHUMID setting on the ReliaTel Options Module. See Figure 60, p. 41. Programmable Zone Sensor - (BAYSENS119* This 7 day programmable sensorfeatures 2, 3 or 4 periods for Occupied or Unoccupied programming per day. If the power is interrupted, the program is retained in permanent memory. If power is off for an extended period of time, only the clock and day may have to be reset. The Zone Sensor allows selection of 2, 3 or 4 system modes (Heat, Cool, Auto, and Off), two fan modes (On and Auto). It has dual temperature selection with programmable start time capability. The occupied cooling set point ranges between 45 and 98 ° F. The heating set point ranges between 43 and 96°F. A liquid crystal display (LCD) displays zone temperature, temperature set points, day of the week, time, and operational mode symbols. The Option Menu is used to enable or disable applicable functions, i.e.; Morning Warm-up, Economizer minimum position override during unoccupied status, Fahrenheit or Centigrade, Supply air tempering, Remote zone temperature sensor, 12/24 hour time display, Smart fan, and Computed recovery. During an occupied period, an auxiliary relay rated for 1.25 amps @ 30 volts AC with one set of single pole double throw contacts is activated. Status Inputs (4 Wires Optional) The ZSM can be wired to receive four (4) operating status signals from the RTRM (HEAT, COOL, SYSTEM "ON", SERVICE). Four (4) wires from the RTRM should be connected to the appropriate terminals (7, 8, 9 and 10) on the ZSM. Remote Zone Sensor (BAYSENS073*) This electronic sensor features remote zone sensing and timed override with override cancellation. It is used with a Trane Integrated ComfortT" building management system. Remote Zone Sensor (BAYSENS074*) This electronic sensor features single setpoint capability and timed override with override cancellation. It is used with a Trane Integrated ComfortTm building management system. aTRANE` General Information Remote Zone Sensor (BAYSENS0161 This bullet type temperature sensor can be used for outside air (ambient) sensing, return air temperature sensing, supply air temperature sensing, remote temperature sensing (uncovered). Wiring proceduresvary according to the particular application and equipment involved. Refer to the unit's wiring diagrams for proper connections. Remote Zone Sensor (BAYSENS0771 This electronic sensor can be used with BAYSENS106*, 108*,110*,119* Remote Panels. When this sensor is wired to a BAYSENS119* Remote Panel,wiring must be 18AWG Shielded Twisted Pair (Belden 8760 or equivalent). Referto the specific Remote Panel for wiring details. Wireless Zone Sensor (BAYSENS050*) This electronic sensor features five system settings (Auto, Off, Cool, Heat, and Emergency Heat) and with On and Auto fan settings. It is a manual or auto changeover control with dual setpoint capability. Other features include a timed override function, lockable system settings, and Fahrenheit or Celsius temperature display. Included with the wireless zone sensor will be a receiver that is to be mounted inside the unit, a mounting bracket, and a wire harness. Electromechanical Control The unit must have a thermostat to operate. • BAYSTAT151 • Single Stage - 1 Heat/1 Cool • BAYSTAT155 • Multi Stage - 3 Heat/2 Cool - Can be Used for Economizer Operation • BAYSENS150 • Multi stage - 3 Heat/2 Cool Programmable Thermostat High Temperature Sensor (BAYFRST001* This sensor connects to the RTRM Emergency Stop Input on the LTB and provides high limit "shutdown" of the unit. The sensor is used to detect high temperatures due to a high thermal event in the air conditioning or ventilation ducts. The sensor is designed to mount directly to the sheet metal duct. Each kit containstwo sensors. The return air duct sensor (X1310004001) is set to open at 135°F. The supply air duct sensor (X1310004002) is set to open at 240°F. The control can be reset after the temperature has been lowered approximately 25°F below the cutout setpoint. Evaporator Frost Control ReliaTell" Option This input incorporates the FrostatT" control (FOS) mounted in the indoor coil circuit and can be activated by RT-SVX21 AB-E N 15 aTRANE` General Information closing a field supplied contact installed in parallel with the FOS. If this circuit is closed before the compressor is started, the compressor will not be allowed to operate. Anytime this circuit is closed for 1 continuous second during compressor operation, the compressor for that circuit is immediately turned "Off". The compressor will not be allowed to restart for a minimum of 3 minutes should the FOS open. Frostat is standard on multi -speed indoor motors and single zone VAV products (SZVAV). Electromechanical Option This input incorporates the FrostatTl control (FOS) mounted inthe indoorcoil circuitoron suction line before equalizer port of TXV and can be activated by opening a field supplied contact installed in series with the FOS. If this circuit is open before the compressor is started, the compressor will not be allowed to operate. Anytime this circuit is opened during compressor operation, the compressor for that circuit is immediately turned "Off". The compressor will restart when the FOS closes. FrostatTl is standard on YSC036-06OG electromechanical control products. Discharge Line Temp Switch (DLTS) The DLTS is looped in series with HPC and LPC. It prevents compressor from overheating (over 300 F° dome temp) in case of indoor fan failure (cooling) or outdoor fan failure (heating). Smoke Detector Sensor (Optional) This sensor provides high limit "shutdown" of the unit and requires a manual reset. The sensor is used to detect smoke in the air conditioning or ventilation ducts. Notes: • The supply air smoke detector samples supply air. The return and plenum air smoke detectors sample return air. The smoke detectors are designed to shut off the unit if smoke is sensed. This function is performed by sampling the airflow entering the unit at the return air opening. Follow the instructions provided below to assure that the airflowthrough the unit is sufficient for adequate sampling. Failure to followthese instructions will prevent the smoke detectors from performing its design function. • Airflow through the unit is affected by the amount of dirt and debris accumulated on the indoor coil and filters. To insure that airflow through the unit is adequate for proper sampling by the return air smoke detector, complete adherence to the maintenance procedures, including recommended intervals between filter changes, and coil cleaning is required. • Periodic checks and maintenance procedures must be performed on the smoke detector to insure that it will function properly. For detailed instructions concerning these checks and procedures, refer to the appropriate section(s) of the smoke detector Installation and Maintenance Instructions provided with the literature package for this unit. In order for the supply air smoke detector or return air smoke detector to properly sense smoke in the supply air stream or return air stream, the air velocity entering the smoke detector unit must be between 500 and 4000 feet per minute. Equipment covered in this manual will develop an airflow velocity that falls within these limits over the entire airflow range specified in the evaporator fan performance tables. Phase Monitor This sensor monitors voltage between the 3 conductors of the 3 phase power supply. Two LED lights are provided: • The green light indicates that a balanced 3 phase supply circuit is properly connected. • The red light indicates that unit operation has been prevented. There are two conditions that will prevent unit operation: • The power supply circuit is not balanced with the proper phase sequence of L1, L2, L3 for the 3 conductors of a 3 phase circuit. • The line to line voltage is not between 180 volts and 633 volts. Single Zone Variable Air Volume / Displacement Ventilation (Optional) This sensor offers full supply fan modulation across the available airflow range. In addition to full supply fan modulation, the unit controls the discharge air temperature to a varying discharge air temperature setpoint in order to maintain Space Temperature. Human Interface - 5 Inch Color Touchscreen (Optional) The 5 inch color touchscreen Human Interface provides an intuitive user interface to the rooftop unit that speeds up unit commissioning, shortens unit troubleshooting times, and enhances preventative maintenance measures. The human interface includes several features including: • Data trending capabilities by means of time series graphs • Historical alarm messages • Real-time sensor measurements • On board system setpoints • USB port that enables the downloading of component runtime information as well as trended historical sensor data • Customized reports 16 RT-SVX21AB-EN 0 TRANE` Pre -Installation Fiberglass Wool! Exposition to glass wool fibers without all necessary PPE equipment could result in cancer, respiratory, skin or eye irritation, which could result in death or serious injury. Disturbing the insulation in this product during installation, maintenance or repair will expose you to airborne particles of glass wool fibers and ceramic fibers known to the state of California to cause cancer through inhalation. You MUST wear all necessary Personal Protective Equipment (PPE) including gloves, eye protection, a NIOSH approved dust/mist respirator, long sleeves and pants when working with products containing fiberglass wool. Precautionary Measures • Avoid breathing fiberglass dust. • Use a NIOSH approved dust/mist respirator. • Avoid contact with the skin or eyes. Wear long- sleeved, loose -fitting clothing, gloves, and eye protection. • Wash clothes separately from other clothing: rinse washer thoroughly. • Operations such as sawing, blowing, tear -out, and spraying may generate fiber concentrations requiring additional respiratory protection. Use the appropriate NIOSH approved respiration in these situations. First Aid Measures Eye Contact - Flush eyes with water to remove dust. If symptoms persist, seek medical attention. Skin Contact - Wash affected areas gently with soap and warm water after handling. RT-SVX21 AB-E N 17 0 TRANE` Dimensions and Weights Unit Clearances Figure 1, p. 18 illustrates the minimum operating and service clearances for either a single or multiple unit installation. These clearances are the minimum distances necessary to assure adequate serviceability, cataloged unit capacity, and peak operating efficiency. Providing less than the recommended clearances may result in condenser coil starvation, "short-circuiting" of exhaust and economizer airflows, or recirculation of hot condenser air. Figure 1. Typical installation clearances for single and multiple unit applications 1. For horizontal discharge unit, this measurement is reduced to 1'6" (457 MM) to minimize duct extensions. 2. When equipped with economizer or barometric relief damper, clearance distance is to be measured from protruding hood instead of base. 4. Addition clearance required when barometric damper or economizer is installed. YSC036-06OG & YHC036, YHC037E Units YSC072-120H, YHC048-120F, YHC047-067E Units 18 RT-SVX21AB-EN qWTRANE Dimensions and Weights Figure 2. Corner weights Center of Gravitv Heavy Objects! Failure to follow instructions below or properly lift unit could result in unit dropping and possibly crushing CE operator/technician which could result in death or c serious injury, and equipment or property -only damage. Ensure that all the lifting equipment used is properly rated for the weight of the unit being lifted. Each of the cables (chains or slings), hooks, and shackles used to lift the unit must be capable of supporting the entire weight of the unit. Lifting cables (chains or slings) may not be of the same length. Adjust as necessary for even unit lift. Improper Unit Lift! Failure to properly lift unit could result in unit dropping and possibly crushing operator/technician which could result in death or serious injury, and equipment or property -only damage. Test lift unit approximately 24 inches to verify proper center of gravity lift point. To avoid dropping of unit, reposition lifting point if unit is not level. Table 3. Maximum unit and corner weights (lbs) and center of gravity dimensions (in.) - gas/electric models G3 C Tons Unit Model No. Maximum Model Weights(a) Corner Weights(b) Center of Gravity (in.) Shipping Net A B C D Length Width 3 YSC036G 577 472 193 178 45 55 33 9 4 YSC048G 598 492 205 183 46 58 33 9 5 YSC060G 627 522 214 193 52 63 33 10 6 YSC072H 805 710 222 217 121 150 41 22 7.5 YSC090H 925 832 253 225 169 185 42 23 7.5 YSC092H 990 847 265 249 173 160 46 21 8.5 YSC102H 1028 927 300 242 203 182 47 22 10 YSC120H 1156 1058 345 242 258 213 41 23 3 YHC036E 607 532 165 137 95 134 31 19 4 YHC048E 858 763 238 200 148 176 40 23 4 YHC048F 806 711 226 199 144 143 44 22 5 YHC060E 917 822 261 218 156 187 40 22 5 YHC060F 850 755 239 214 152 151 44 21 6 YHC072E 1025 927 296 198 205 228 41 24 6 YHC072F 965 822 250 245 174 153 47 21 6 YHC074F 1114 1016 334 231 248 202 41 23 7.5 YHC092F 1124 1026 340 233 249 204 41 23 8.5 YHC102F 1133 1035 341 236 253 205 49 23 10 YHC120F 1453 1259 356 371 289 242 54 27 (a) Weights are approximate. (b) Corner weights are given for information only. RT-SVX21 AB-E N 19 qWTRANE Dimensions and Weights Figure 3. Rigging and center of gravity ATTA[ CABLE Table 4. Factory installed options (fiops)/accessory net weights (lbs)(a),(b) Accessory YSC036G-060G YHC036E,YHCO37E Net Weight YHCO47E-067E YHC048E-06OE YHCO48F-06OF Net Weight YSC072H-102H YHCO72E/F Net Weight YSC120H YHCO74F-1O2F Net Weight YHC12OF Net Weight 3 to 5 Tons 4 to 5 Tons 6 to 8.5 Tons 6, 7.5, 8.5, 10 10 Barometric Relief 7 10 10 10 10 Belt Drive Option (3 phase only) 31 31 — — — Coil Guards 12 20 20 20 30 Economizer 26 36 36 36 36 Electric Heaters (c) 15 30 30 44 50 Hinged Doors 10 12 12 12 12 Low Leak Economizer 70 91 91 91 91 Manual Outside Air Damper 16 26 26 26 26 Motorized Outside Air Damper 20 30 30 30 30 Novar Control 8 8 8 8 8 Oversized Motor 5 8 8 — — Powered Convenience Outlet 38 38 38 38 50 Powered Exhaust 40 40 80 80 80 Reheat Coil 12(d) 14 15 20(e) 30 Roof Curb 61 78 78 78 89 Smoke Detector, Supply 5 5 5 5 5 Smoke Detector, Return 7 7 7 7 7 Stainless Steel Heat Exchangerf0 4 6 6 6 6 Through -the -Base Electrical 8 13 13 13 13 Through -the -Base Gas 5 5 5 5 5 Unit Mounted Circuit Breaker 5 5 5 5 5 Unit Mounted Disconnect 5 5 5 5 5 (a) Weights for options not listed are <5 lbs. (b) Net weight should be added to unit weight when ordering factory -installed accessories. (c) Applicable to cooling units only. (d) Reheat weight here is only applicable to YHC036E models. (e) Reheat weight for this value only applicable to 7.5 and 8.5 Ton High Efficiency "F" models. (f) Applicable to Gas/Electric units only. 20 RT-SVX21 AB-E N Figure 4. Cooling and gas/electric - 3 to 5 tons standard efficiency(a),(b) TOP PANEL —ESS PANEL CONDEn ATE DI 314 - l4 NPT DIA. MOLE 3 8/1s' GAS CONNECTION- 1/2 NM (bey IDo MBM1)J NPT (120, 130, 150 men) M'1 10IIIIIIIIIII/'� All— PANEL (a)All dimensions are in inches/millimeters. (b) 1/2 NPT or 3/4 NPT gas connection = (Y_C models only); 2" electrical connection: single point power when heat installed (T_C models only) Figure 5. Cooling and gas/electric - 3 tons high efficiency(a),(b) —P..M. S -\ ACM PANEL `1 MAP ZT.PRESSOR 2 MM NPT GAGGONNEG ON 24 (a)All dimensions are in inches/millimeters. (b) 1/2 NPT gas connection = (Y_C models only); 2" electrical connection: single point power when heat installed (T_C models only) Figure 6. Cooling and gas/electric —3 to 5 tons standard efficiency, 3 tons high efficiency downflow airflow supply/return— through - the -base utilities(a) (a)All dimensions are in inches/millimeters. RT-SVX21 AB-E N Owl M4ME Dimensions and Weights Figure 7. Cooling and gas/electric —3 to 5 tons standard efficiency, 3 tons high efficiency — horizontal airflow supply/return(a) 3 3/16" 61 MM ' 14 3/4" 23 1/4" 375 MM 591 MM RETURN 4 3/4" SUPPLY 12 MM 0 13 1/4 337 MM 17 1/4" 8 7/8" 438 MM 225 MM 3/4-14 NPT DRAIN CONNECTION CONDENSER COIL (a) All dimensions are in inches/millimeters. Figure 8. Cooling and gas/electric —3 to 5 tons standard efficiency, 3 tons high efficiency — unit clearance and roof opening(al CLEARANCE CLEARANCE 36" (914 \ l MM HORIZONTAL FLOW - (457 MM) � DOWNFLOW 36" (914 MM) \TYPICAL ROOF OPENING CLEARANCE FROM TOP OF UNIT 72" 68 3/16" 40" \ 1732 MM 1O1637" M\ 940 MM � 1/2"/ 1130 MM CLEARANCE 48" (1219 MM) \� CLEARANCE 36" (914 MM) (a) All dimensions are in inches/millimeters. Figure 9. Cooling and gas/electric —3 to 5 tons standard efficiency, 3 tons high efficiency — roof curb(a) c pq 36 lg1a rNMI 1 3/4" N 37c�Fq WWNCt` Ge �44 MM 951 NCF `76'0 PQ,P mM MM 25 3/16 14 9/16" (4Sz4MM 640 MM 370 MM 1M -` 31-- 61 13/16" MJ 'O • �R\v 21_MM 1568 MM 16%/MM F0RH o/y 35 MM 4253MM 1-JNYO� 1 3/4" Q�� " 14" �44 MM S� cYF F C. 65 13/16" 40 7/8" Fy 1670 MM 1038 MM 417/16 (I111 512MM 1053 MM a M) 1 M MJ 512MM G�P�NG�36n (,9 (a) All dimensions are in inches/millimeters. 21 qWTRANE Dimensions and Weights Figure 10. Cooling and gas/electric —3 to 5 standard Figure 12. Cooling and gas/electric —3 to 5 tons efficiency, 3 tons high efficiency — downflow standard efficiency, 3 tons high efficiency — duct connections, field fabricated(a) economizer and barometric relief damper hood(a) P24 3/8" (619MM)i4— 6 3/16"14- / 171/16" (433 MM) IGES 1 1/4" (32 MM) (a) All dimensions are in inches/millimeters. Figure 11. Cooling and gas/electric —3 to 5 tons standard efficiency, 3 tons high efficiency — economizer, manual or motorized fresh air damper, power exhaust(a) xre�e: � 16 uz iaiv nn (a)All dimensions are in inches/millimeters. (a) All dimensions are in inches/millimeters. Figure 13. Cooling and gas/electric —3 to 5 tons standard efficiency, 3 tons high efficiency — swing diameter for hinged door(s) option v � 17 acn M8m 16" 406 MM Applicable to 22 1/4" Y_C models only 565 MM 22 RT-SVX21 AB-E N Figure 14. Gas/electric — 3 to 10 tons standard and high efficiency— gas pipe height (Y models only)(a)•(b) I I __<jI (a)All dimensions are in inches/millimeters. (b) Height of gas pipe required from inside unit base to gas shut off assem- bly (factory provided) Figure 15. Cooling and gas/electric —6, 7.5 (single) tons standard efficiency, 4 to 5 tons high efficiency(a1 \7 (a)All dimensions are in inches/millimeters. Figure 16. Cooling and gas/electric - 6 to 10 tons standard efficiency, 4 to 8.5 tons high efficiency - downflow airflow supply/return, through -the -base utilities(a) r` _ Owl M4ME Dimensions and Weights Figure 17. Cooling and gas/electric — 6 to 10 ton standard efficiency units, 4 to 6 ton high efficiency units, 6(074)-8.5 (microchannel) high efficiency unit —horizontal airflow supply/ return(a) (a) All dimensions are in inches/millimeters. Figure 18. Cooling and gas/electric —6 to 10 tons standard efficiency, 4 to 8.5 tons high efficiency— unit clearance and roof openir l EARANCE CLEARANCE 36"(914 MM) HOL FLOW -18"MM) OOWNFLOWWNFLOW-36"(919 MM) / \\ TYPICAL ROOF OPENING CLEARANCE FROM TOP OF UNR 46"\ 96"/ \ 88 5/8" 1168 M��1168 M 2M 251 MM / 53 1/4- / /1352 MM CLEARANCE 48' (� MM) CLEARANCE 36" (919 MM) (a) All dimensions are in inches/millimeters. Figure 19. Cooling and gas/electric —6 to 10 tons standard efficiency, 4 to 8.5 tons high efficiency— roof curb(a) 191A MMl cQ GLrGP as 3/e^ F 6 11J8 MM C)a �4� l8+ �9 3J33/8" 25 MM rRS�YAjM 68 M ✓e �� , ---- nn,n tiiyJ�,cp (a) All dimensions are in inches/millimeters. GvePyll. (a)All dimensions are in inches/millimeters. RT-SVX21 AB-E N 23 aTRANE` Dimensions and Weights Figure 20. Cooling and gas/electric —6 to 10 tons standard efficiency, 4 to 10 tons high efficiency— downflow duct connections, field fabricated(a)'(b),(c) 17 3/4" S1MM �' 17 3/4" 33 3/4" 51MM 7' 8�MM 33 /4" 1 857 MM I I 1 ALL FLANGES 1 1/4" (31 MM) 1 I 1 (a)All dimensions are in inches/millimeters. (b) Reference duct clearance to combustible materials in this chapter. (c) 1/2 or 3/4 NPT gas connection = (Y_C models only); 2" electrical con- nection: single point power when heat installed (T_C models only) Figure 21. Cooling and gas/electric —6 to 10 tons standard efficiency, 4 to 10 tons high efficiency— economizer, manual or motorized fresh air damper(a) (a)All dimensions are in inches/millimeters. Figure 22. Cooling and gas/electric —6 to 10 tons standard efficiency, 4 to 8.5 tons high efficiency— swing diameter for hinged door(s) option(a) 17' 432 MM 21 3/8" 143 Mn Applicable to Y_C models only 3a s%s^ --- .79 MM (a) All dimensions are in inches/millimeters. Figure 23. Cooling and gas/electric —7.5 (dual compressor) to 10 tons standard efficiency, 6 to 8.5 tons high efficiency(a) (a)All dimensions are in inches/millimeters. Figure 24. Cooling and gas/electric —7.5 (dual compressor) to 10 tons standard efficiency, 6 to 8.5 tons high efficiency— power exhaust(a) (a) All dimensions are in inches/millimeters. 24 RT-SVX21 AB-E N Figure 25. Cooling and gas/electric —10 tons high efficiency(a) (a)All dimensions are in inches/millimeters. Figure 26. Cooling and gas/electric —10 tons high efficiency— downflow airflow supply/return, through -the -base utilities(a) (a)All dimensions are in inches/millimeters. aTRANE` Dimensions and Weights Figure 27. Cooling and gas/electric —10 tons high efficiency— horizontal airflow, supply and return(a) (a) All dimensions are in inches/millimeters. Figure 28. Cooling and gas/electric —10 tons high efficiency— unit clearance and roof opening(a) CLEARANCE CLEARANCE 36" (914 MM) HORIZONTAL FLOW - 18" (457 MM) / ^ DOWNFLOW 36"(914 MM) TYPICAL ROOF OPENING CLEARANCE FROM TOP OF UNIT JZ" 99 11/16" 8 M 46°2- MM 21168 MM 1168 MM / i' ' 63 3/16"� 1 5 MM CLEARANCE 48- (121 9 MM) CLEARANCE 36" (914 MM) (a) All dimensions are in inches/millimeters. Figure 29. Cooling and gas/electric —10 tons high efficiency— roof curb(a) (a) All dimensions are in inches/millimeters. RT-SVX21 AB-E N 25 aTRANE` Dimensions and Weights Figure 30. Cooling and gas/electric —10 tons high efficiency— power exhaust(a) ONOMIZER HOOD (a) All dimensions are in inches/millimeters. Figure 31. Cooling and gas/electric —10 tons high efficiency— swing diameter for hinged door(s) option(a) (a)All dimensions are in inches/millimeters. 26 RT-SVX21AB-EN 0 TRANE' Installation Foundation Heavy Objects! Failure to follow instructions below or properly lift unit could result in unit dropping and possibly crushing operator/technician which could result in death or serious injury, and equipment or property -only damage. Ensure that all the lifting equipment used is properly rated for the weight of the unit being lifted. Each of the cables (chains or slings), hooks, and shackles used to lift the unit must be capable of supporting the entire weight of the unit. Lifting cables (chains or slings) may not be of the same length. Adjust as necessary for even unit lift. Roof Damage! System contains oil and refrigerant under high pressure. Roofs should be protected from exposure to oils and refrigerant in the system. If rooftop is not protected, damage to the roof may occur. Important: Refer to local building codes for proper installation. All installation must comply with local building codes. Horizontal Units If the unit is installed at ground level, elevate it above the snow line. Provide concrete footings at each support location with a "full perimeter" support structure or a slab foundation forsupport. Refer to the weights information in the Dimensions and Weights chapter for the unit's operating and point loading weights when constructing a footing foundation. If anchoring is required, anchor the unit to the slab using hold down bolts or isolators. Isolators should be installed to minimize the transmission of vibrations into the building. Risk of Roof Collapsing! Failure to ensure proper structural roof support could cause the roof to collapse, which could result in death or serious injury and property damage. Confirm with a structural engineer that the roof structure is strong enough to support the combined weight of the roofcurb and the unit. Refer to the weights section for typical unit and curb weights. For rooftop applications, ensure the roof is strong enough to support the combined unit and support structural weight. Referto maximum unitand cornerweights (center of gravity) dimensions in the Dimensions and Weights section for the unit operating weights. If anchoring is required, anchor the unit to the roof with hold-down bolts or isolators. Check with a roofing contractor for proper waterproofing procedures. Ductwork Supply and return air openings as viewed from the rear of the unit are shown in the following drawings. Figure 32. Cooling and gas/electric — 3 to 5 tons standard efficiency, 3 tons high efficiency — horizontal airflow supply/return(a) 3 3/18" B1 MM 14 3/4" 23 1/4" 375 MM 591 MM RETURN 4 3/4" SUPPLY 12 MM 13 1/4 337 MM 17 1/4" 8 7/8 438 MM 225 MM 3/4-14 NPT DRAIN CONNECTION CONDENSER COIL (a) All dimensions are in inches/millimeters. Figure 33. Cooling and gas/electric — 6-10 ton standard efficiency units, 4 to 6 ton high efficiency units, 6(074)-8.5 (Microchannel) high efficiency unit —horizontal airflow supply/return(a) (a) All dimensions are in inches/millimeters. RT-SVX21 AB-E N 27 qWTRANE Installation Figure 34. Cooling and gas/electric —10 tons high efficiency— horizontal airflow, supply and return(a) (a)All dimensions are in inches/millimeters. Supply and return air openings as viewed from a downflow configuration are shown in the following drawings. Elbows with turning vanes or splitters are recommended to minimize air noise due to turbulence and to reduce static pressure. When attaching the ductwork to the unit, provide a water tight flexible connector at the unit to prevent operating sounds from transmitting through the ductwork. All outdoor ductwork between the unit and the structure should be weather proofed after installation is completed. Figure 35. 3 to 5 ton standard efficiency units and 3 ton high efficiency units - downflow supply and return air openings w/ through -the -base utilities Figure 36. 4 to 6 ton high efficiency units, 6(074)-8.5 (Microchannel) high efficiency units and 6 to 10 ton standard efficiency units - down flow supply and return air openings w/ through- the- base utilities SUPPLY III Figure 37. 10 ton high efficiency unit - downf low supply and return air openings w/ through -the -base utilities Roof Curb Downflow The roof curbs forthese units consists of a "full perimeter" enclosure to support the unit just inside of the unit base rail. The 10ton high efficiency units contain a support base alignment rail and will extend pastthe end of the roof curb as shown in figures below. Before installing any roof curb, verify; • It is the correct curb for the unit, • It includes the necessary gaskets and hardware, • The installation location provides the required clearance for proper operation, • The curb is level and square. The top surface of the curb must be true to assure an adequate curb -to -unit seal. 28 RT-SVX21 AB-E N Combustible Materials! Failure to maintain proper clearance between the unit heat exchanger, vent surfaces and combustible materials could cause a fire which could result in death or serious injury or property damage. Refer to unit nameplate and installation instructions for proper clearances. Verify that appropriate materials were used in the construction of roof and ductwork. Combustible materials should not be used in the construction of ductwork or roof curb that is in close proximity to heater elements or any hot surface. Any combustible material on the inside of the unit base should be removed and replaced with appropriate material. Step-by-step curb assembly and installation instructions ship with each accessory roof curb kit. Follow the instructions carefully to assure proper fit -up when the unit is set into place. Note: To assure proper condensate flow during operation, as well as proper operation of the condensate overflow switch (if equipped), the unit and curb must be level. If the unit is elevated, a field constructed catwalk around the unit is strongly recommended to provide easy access for unit maintenance and service. Recommendations for installing the SupplyAirand Return Air ductworkjoining the roof curb are included in the curb instruction booklet. Curb ductwork must be fabricated and installed by the installing contractor before the unit is set into place. Note: For sound consideration, cut only the holes in the roof deck for the ductwork penetrations. Do not cut out the entire roof deck within the curb perimeter. Figure 38. View for base to roof curb alignment YHC120F on 50" x 84" roof curb Base Align TRANE Installation Figure 39. View for base to roof curb alignment YHC120F on 60" x 84" roof curb If a Curb Accessory Kit is not used: • The ductwork can be attached directly to the factory - provided flanges around the unit's supply and return air openings. Be sure to use flexible duct connections at the unit. • For "built-up" curbs supplied by others, gaskets must be installed around the curb perimeter flange and the supply and return air opening flanges. Rigging Heavy Objects! Failure to follow instructions below or properly lift unit could result in unit dropping and possibly crushing operator/technician which could result in death or serious injury, and equipment or property -only damage. Ensure that all the lifting equipment used is properly rated for the weight of the unit being lifted. Each of the cables (chains or slings), hooks, and shackles used to lift the unit must be capable of supporting the entire weight of the unit. Lifting cables (chains or slings) may not be of the same length. Adjust as necessary for even unit lift. A rigging illustration and center -of -gravity dimensional data table is shown in the weights section. Refer to the typical unit operating weights table before proceeding. 1. Remove all drill screws fastening wood protection to metal base rail. Remove all screws securing wooden protection to wooden top crate. 2. Remove Wooden Top Crate. RT-SVX21 AB -EN 29 qWTRANE Installation Improper Unit Lift! Failure to properly lift unit could result in unit dropping and possibly crushing operator/technician which could result in death or serious injury, and equipment or property -only damage. Test lift unit approximately 24 inches to verify proper center of gravity lift point. To avoid dropping of unit, reposition lifting point if unit is not level. 3. Rig the unit as shown in the weights section. Attach adequate strength lifting slings to all four lifting brackets in the unit base rail. Do not use cables, chains, or slings except as shown. 4. Install a lifting bar, as shown in the weights section to protect the unit and to facilitate a uniform lift. The minimum distance between the lifting hook and the top of the unit should be 7 feet. 5. Test -lift the unit to ensure it is properly rigged and balanced, make any necessary rigging adjustments. Figure 40. Fork pockets -all units except 10 ton high efficiency units REMO\ FORK BRAD REMOVE 2 METAL RUNNERS AND 3 WOODEN BOARDS Figure 41. Fork pockets - 10 ton high efficiency unit NOTICE REMOVE THIS ROOFCURB ALIGNMENT BRACKET PRIOR TO SETTING UNIT ONTO 60XU INCH ROOFCURB ONLY REMOVE I METAL RUNNER REMOVE 2 WOODEN BOARDS 6. Lift the unit enough to allow the removal of base fork pocket protection components as shown in the following figures. 7. When 10 ton high efficiency units are installed on smaller existing roof curb (50"x 84") for replacement applications, do not remove alignment bracket. This bracket helps assure proper alignment of duct openings. 8. Downflow units; align the base rail of the unitwith the curb rail while lowering the unit onto the curb. Make sure that the gasket on the curb is not damaged while positioning the unit. General Unit Requirements The checklist listed below is a summary of the steps required to successfully install a commercial unit. This checklist is intended to acquaint the installing personnel with what is required in the installation process. It does not replace the detailed instructions called out in the applicable sections of this manual. • Check the unit for shipping damage and material shortage; file a freight claim and notify appropriate sales representative. • Verify correct model, options and voltage from unit nameplate. • Verify that the installation location of the unit will provide the required clearance for proper operation. • Assemble and install the roof curb (if applicable). Refer to the latest edition of the curb installers guide that ships with each curb kit. • Fabricate and install ductwork; secure ductwork to curb. • Install pitch pocket for power supply through building roof. (If applicable) • Rigging the unit. • Set the unit onto the curb; check for levelness. • Ensure unit -to -curb seal is tight and without buckles or cracks. • Install and connect a condensate drain line to the evaporator drain connection. Note: Condensate Overflow Switch (if equipped) will not work if unit is not leveled properly. Factory Installed Economizer • Ensure the economizer has been pulled out into the operating position. Refer to the economizer REMOVE10FORK installation guide for proper position and setup. LIFT BRACKETS • Install all access panels. 30 RT-SVX21 AB-E N Temperature Limit Switch Usage for Gas Heat Units Units are factory shipped in the downflow discharge configuration but can be field converted to a horizontal discharge configuration. Some, but not all units require a different TC01 limit switch, which is attached to the combustion blower motor if horizontal discharge configuration is used. If any of the units are installed in the downflow discharge configuration and have the alternate TC01 limit switch provided, remove the additional TC01 limit switch from the combustion blower motor and discard. Table 5. TC01 tripping values Unit Model - 6 to 10 Ton Standard Efficiency TCO1 Tripping Values - Downflow/ Horizontal YSC072H**(M,Y) 155F/170F YSC072H**(L,X) 170F YSC072H**(H,Z) 145F/155F YSC090H**(L,X) 180F/20OF YSC090H**(M,Y) 155F YSC090H**(H,Z) 155F YSC092H**(L,X)(a) 200F/220F YSC092H**(L,X)(b) 225F YSC092H**(M,Y)(a) 230F YSC092H**(M,Y)(b) 190F/225F YSC092H**(H,Z)(a) 220F/26OF YSC092H**(H,Z)(b) 220F/26OF YSC102H**(L,X)(a) 200F/220F YSC102H**(L,X)(b) 225F YSC102H**(M,Y)(a) 230F YSC102H**(M,Y)(b) 190F/225F YSC102H**(H,Z)(a) 220F/26OF YSC102H**(H,Z)(b) 220F/26OF YSC120H**(L,X) 190F/225F YSC120H**(M,Y) 20OF YSC120H**(H,Z) 150F/21OF (a) Digit 15 = 0,1 (b) Digit 15 = 6,7 Table 6. TC01 tripping values(a)•(b) Unit Model - High Efficiency 15 SEER TC01 Tripping Values - Downflow/ Horizontal YHC036E**(L,X)-DD 18OF YHC036E**(L,X)-BD 170F YHC036El*(M,Y)-DD YHC036E(3,4,W)*(M,Y)-DD 190F 170F/19OF YHC036E**(M,Y)-BD 180F/190F YHC036El*(H,Z)-DD YHC036E(3,4,W)*(H,Z)-DD 190F/22OF 170F/19OF YHC036E**(H,Z)-BD 155F/190F YHC048Fl*(L,X)-DD YHC048E/F(3,4,W)*(L,X)-D D 170F/155F 145F/155F YHC048E/F**(L,X)-BD 155F qWTRANE Installation Table 6. TC01 tripping values(a),(b) (continued) Unit Model - High Efficiency 15 SEER TCOi Tripping Values - Downflow/ Horizontal 140F 150F/17OF YH C048 Fl * (M,Y)-DD YHC048E/F(3,4,W)*(M,Y)-DD YHC048E/F**(M,Y)-BD 170F/18OF YHC048F1*(H,Z)-DD YHC048E/F(3,4,W)*(H,Z)-DD 180F/20OF 220F YHC048E/F**(H,Z)-BD 220F/26OF YHC060F1*(L,X)-DD YHC060E/F(3,4,W)*(L,X)-DD 155F 140F YHC060E/F**(L,X)-BD 155F/145F YHC060F1*(M,Y)-DD YHC060E/F(3,4,W)*(M,Y)-DD 140F/15OF 145F/170F YHC060E/F**(M,Y)-BD 170F YHC060F1*(H,Z)-DD YHC060E/F(3,4,W)*(H,Z)-DD 180F 190F/22OF YHC060E/F**(H,Z)-BD 220F/23OF YHC072E/F**(L,X) 20OF YHC072E/F**(M,Y) 220F YHC072E/F**(H,Z) 21OF YHC074F**(L,X) 170F YHC074F**(M,Y) 180F/19OF YHC074F**(H,Z) 180F/23OF YHC092F**(L,X) 200F/220F YHC092F**(M,Y) 190F/225F YHC092F**(H,Z) 20OF YHC102F**(L,X) 200F/220F YHC102F**(M,Y) 190F/225F YHC102F**(H,Z) 20OF YHC120F**(L,X) 170F/20OF YHC120F**(M,Y) 170F/19OF YHC120F**(H,Z) 135F/155F (a) BD= Belt drive ID motor (b) DD= Direct drive ID motor Table 7. TC01 tripping values Unit Model - High Efficiency 17 Plus TC01 Tripping Values - Downflow/ Horizontal YHC037**(L,X) 190F YHC037**(M,Y) 170F/22OF YHC037**(H,Z) 220F YHC047**(L,X) 145F/155F YHC047**(M,Y) 170F YHC047**(H,Z) 220F YHC067**(L,X) 140F YHC067**(M,Y) 170F YHC067**(H,Z) 170F RT-SVX21 AB-E N 31 qWTRANE Installation Table 8. TC01 tripping values Unit Model - 3 to 5 Ton Standard Efficiency - MCHE Standard Motor TCO1 Tripping Values Downflow/ Horizontal Oversized Motor TCO1 Tripping Values Downflow/ Horizontal YSC036G**(L,X)B 170F 170F YSC036G**(M,Y)B 170F 170F/155F YSC036G**(H,Z)B 150F 150F YSC048G**(L,X)B 170F 155F YSC048G**(M,Y)B 170F 170F/155F YSC048G**(H,Z)B 15OF 15OF YSC060**(L,X)B 170F 155F YSC060**(M,Y)B 155F 155F YSC060**(H,Z)B 150F 150F Horizontal Discharge Conversion (3 to 5 Ton Units) Note: 3 to 5 ton units supply cover to supply opening and return cover to return opening. Supplies needed by installer for conversion: 3 oz. tube of high temperature RTV sealant. (500°F / 260°C: similar to Dow Corning 736) Important: Failure to use recommended sealant could result in unit performance loss. If a unit is to be converted to a horizontal discharge, the following conversion must be performed: 1. Remove RETURN and SUPPLY duct covers. 2. Locate supply cover. Apply'/4 in. (6mm.) continuous bead of 500°F RTV sealant to the flange as shown. Figure 42. Duct cover 3. Position duct cover as shown, rotate 90 degrees to allow entrance into supply opening. 4. Slide duct covers into duct openings until inward edge of duct cover engages with the 2 retaining clips on the duct flanges. Secure the outward edge of each duct cover with 2 screws. 5. Slide RETURN DUCT COVER (insulation side up) into supply opening until inward edge of duct cover engages with the 2 retaining clips on the duct flange. Secure outward edge of the duct cover with two screws. 6. After completing installation of the duct covers for horizontal discharge, proceed to TC01 instructions. TC01 Instructions If the unit being installed has a different TC01 value (refer to previous tables), the limit control TC01 must be replaced with the extra limit control shipped in the heater compartment. Replace TC01 following the instructions in steps 1 through 3 below. If the unit being installed does not correspond to any in the following list, skip steps 1 through 3 and go on to next step in the installation process. Figure 43. TC01 location (YHC036E, YHC037E) Flame Rollout Limit - Location of TC01 limit for YHC036E and YHC037E units Location of TC01 limit YSC033-063G Hazardous Voltage! Failure to disconnect power before servicing could result in death or serious injury. Disconnect all electric power, including remote disconnects before servicing. Follow proper lockout/tagout procedures to ensure the power can not be inadvertently energized. 1. Remove the heat section access panel. 2. Remove TC01 from shipping location, attached to the combustion blower. 3. Replace and discard the existing TC01 originally installed at the factory for down flow operation with the TC01 shipped attached to the combustion blower for horizontal operation. 4. Replace heat section access panel. 32 RT-SVX21AB-EN Horizontal Discharge Conversion • (6 to 10 Ton Units) Note: 6 to 10 ton units the supply cover to return opening • and return cover to supply opening. Supplies Needed by Installer for Conversion: 3 oz. tube of high Temperature RTV sealant (500°F / 260°C: Similar to Dow Corning 736). Important: Failure to use recommended sealant could result in unit performance loss. If a unit is to be converted to a Horizontal discharge, the following conversion must be performed: 1. Remove RETURN and SUPPLY duct covers. 2. Place SUPPLY DUCT COVER over down -flow return opening. (insulation side down) 3. Using self -drilling screws, (or screws removed from duct cover), screw through dimples to attach DUCT COVER to base. Figure 44. Duct cover Supply Duct Cover Screw into 4 dimples on top edge 4. On original RETURN DUCT COVER, apply 1/4"(6mm.) continuous bead of 500°F RTV sealant around flange (opposite insulation side), as shown Figure 45. Duct cover 5. Slide RETURN DUCT COVER (insulation side up) into supply opening until inward edge of duct cover engages with the 2 retaining clips on the duct flange. Secure outward edge of the duct cover with two screws. Notes: aTRANE` Installation If unit is equipped with Return Air Smoke Detector, refer to field conversion instructions for horizontal discharge before installing return air duct. If unit is equipped with Discharge Air Sensing option refer to the following figurefor propertube positioning based on unit tonnage. RT-SVX21 AB-E N 33 qWTRANE Installation Figure 46. For YSC120H*R and YHC074F, 092F,102F models CAP ASSE WITH INSULATIO10 N Downflow application SECURE WITH SCREWS Horizontal application Note: Rotate and install sensing tubes like this for horizontal conversion Secure with screws 6. After completing installation of the duct covers for horizontal discharge, proceed to TC01 instructions Figure 47. Supply and return covers -, � , mm . 00-4, cover Insulation side — Return duct Insulation side up cover TC01 Instructions If the unit being installed is listed in the following list, the limit control TC01 must be replaced with the extra limit control shipped in the heater compartment. Replace TC01 following the instructions in steps 1 through 3 below. If the unit being installed does not correspond to any in the following list, skip steps1 through 3 and go on to next step in the installation process. Unit Model Number YSC072H**(H,Z),YSCO92H**(M,Y), YSC092H**(H,Z), YSC102H**(M,Y), YSC102H**(H,Z), YSC120H**(L,X), YSC120H**(H,Z), YSC090H**(L,X), YHC074F**(M,Y), YHC074F**(H,Z), YHC092F**(M,Y), YHC102F**(M,Y), YHC120F**(L,X), YHC120F**(H,Z). Hazardous Voltage! Failure to disconnect power before servicing could result in death or serious injury. Disconnect all electric power, including remote disconnects before servicing. Follow proper lockout/tagout procedures to ensure the power can not be inadvertently energized. 1. Remove the heat section access panel. 2. Remove TC01 from shipping location, attached to the combustion blower. 3. Replace and discard the existing TC01 originally installed at the factory for down flow operation with the TC01 shipped attached to the combustion blower for horizontal operation. 4. Replace heat section access panel. Figure 48. TC01 location (YHC120F) TCOI limit is located above the burner on the YHC120F models Replace original factory installed TC01 With optional TC01 attached to blower housing for field convertion to horizontal discharge Return Air Smoke Detector The factory installed Return Air Smoke Detector is installed in the downflow discharge position. No additional field setup is required. If a unit is to be converted to horizontal discharge, the following conversion must be performed: 1. If the unit has an economizer, it must be pulled out in the operating position. 2. Remove the 3 screws from the mounting brackets. Refer to downflow view for screws locations. 34 RT-SVX21 AB-E N Figure 49. Downflow view Downflow View 3. Lift the tube and bracket from the downflow duct opening. Rotate the tube and bracket assembly 180 degrees ensuring that the holes on the copper sensing tube face away from the unit and face the return air ductwork. For screw location, reference the following two figures. Figure 50. Horizontal view 1 Ho,izo,ta( V- Figure 51. Horizontal view 2 qWTRANE Installation H—I—tal View2 Note: Check to insure that the flexible tubing lies flat on the base pan surface. 4. Slide the top bracket down the copper sensing tube. For YSC036G-060, and YHC036-037E units insert the tab on the left side into the slot on the indoor coil block off and secure the right side of the bracket with one of the 3 screws removed in step 2. Refer to Figure 50, p. 35. For YHC047E-067E, YHC048E/F-060E/F, YSC072H-120H and YHC(072E/F, 074F-120F) units secure the tab on left side to the indoor coil block off with one of the screws removed in step 2 and secure the right side of the bracket with one of the screws removed from the access panel. Refer to Figure 51, p. 35. 5. Using the remaining 2 screws removed in step 2, secure the bottom bracket. Refer to Figure 50, p. 35. Note: Larger diameter holes on bottom bracket line up with the dimples on the rear panel. The smaller diameter holes line up with the screw holes in the rear panel. Air-Fi® Wireless Communication Interface The factory installed wireless communications interface is installed in the downflow discharge position. If a unit is to be converted to horizontal discharge, the following conversion must be performed: 1. If the unit has an economizer, it must be pulled out in the operating position. 2. Remove the screw from the mounting bracket. Refer to downflow view for screw and bracket location. RT-SVX21AB-EN 35 aTRANE` Installation Figure 52. Wireless communication interface - downflow 3. Mount the bracket in the horizontal discharge location. Refer to horizontal view for screw and bracket location. Figure 53. Wireless communication interface - horizontal Note: Cable ties must be removed to allow the cable to extend to the horizontal mounting location. Main Electrical Power Requirements Hazardous Voltage w/Capacitors! Failure to disconnect power and discharge capacitors before servicing could result in death or serious injury. Disconnect all electric power, including remote disconnects and discharge all motor start/run capacitors before servicing. Follow proper lockout/ tagout procedures to ensure the power cannot be inadvertently energized. Verify with an appropriate voltmeter that all capacitors have discharged. For additional information regarding the safe discharge of capacitors, see PROD-SVB06A-EN. Proper Field Wiring and Grounding Required! Failure to follow code could result in death or serious injury. All field wiring MUST be performed by qualified personnel. Improperly installed and grounded field wiring poses FIRE and ELECTROCUTION hazards. To avoid these hazards, you MUST follow requirements for field wiring installation and grounding as described in NEC and your local/state electrical codes. Verify that the power supply complies with the unit nameplate specifications. • Inspect all control panel components; tighten any loose connections. • Connect properly sized and protected power supply wiring to a field-supplied/installed disconnect switch and to the main powerterminal block (HT131) in the unit control panel. • Install proper grounding wires to an earth ground. Through -the -Base Gas Installation The gas supply line must extend 45/8" above the base pan. The "Through -the -Base Gas" kit is located in the heat vestibule compartment. To gain access to the kit, remove the Heat Compartment access panel. 1. Remove the pipe assembly strapped to the manifold. Unscrew 90' elbow from 61/2" nipple and slide rubber grommet off of nipple. 2. Remove the plastic plug from the hole in the center post and insert the grommet removed from 61/2" pipe nipple. 3. Using pipe sealant, attach the 90' elbow to the gas supply line. 4. Disconnect the 5" pipe nipple and union from the "Through -the -Base Gas" kit assembly. 5. Using pipe sealant, attach the 61/2" nipple and gas shutoff assembly to the 90' elbow on the gas supply line. 6. Using pipe sealant, attach the 5" pipe nipple and union to the street el attached to the gas valve. 7. Connect 5" pipe nipple and union to 61/2" nipple and gas shutoff assembly. Figure 54. Typical through -the -base gas installation 36 RT-SVX21AB-EN 6 1/2" Pipe Nipple (165 MM) •1 •• • • _ Street Elbow wo 'a 1,and 90° Elbow and Nipples 5" Pipe Nipple and Union (127 MM) Requirements for Gas Heat Note: The unit gas train and optional through -the -base gas shut-off valve are rated at 1/2 PSIG maximum. A pressure reducing regulator is recommended to prevent this maximum from being exceeded. These components must be isolated during field gas piping test that exceed 1/2 PSIG. It is recommended that the field piping be capped prior to the unit gas train or optional through -the -base gas shut-off valve if present. • Gas supply line properly sized and connected to the unit gas train. • All gas piping joints properly sealed. • Gas piping leak checked with a soap solution. If piping connections to the unit are complete, do not pressurize piping in excess of 0.50 psig or 14" W.C. to prevent component failure. • Drip leg Installed in the gas piping near the unit. • Minimum gas supply pressure should be 4.5" W.C. • Maximum gas supply pressure must not exceed 14.0" W.C. • Manifold pressure for single stage heaters should be set to 3.3" W.C. • Manifold pressure for two stage heaters should be set to 3.5" W.C. on HIGH FIRE and 1.8" W.C. on LOW FIRE. • Flue Exhaust clear of any obstruction. Condensate Drain Configuration Hazardous Voltage! Failure to disconnect power before servicing could result in death or serious injury. Disconnect all electric power, including remote disconnects before servicing. Follow proper lockout/tagout procedures to ensure the power can not be inadvertently energized. aTRANE` Installation An evaporator condensate drain connection is provided on each unit. Refer to the ductwork section in the Installation chapter for the appropriate drain location. The condensate drain pan is factory installed to drain condensate to the back side of the unit. Refer to the ductwork section in the Installation chapter for the drawings. It can be converted to drain condensate out the front side of the unit or through -the -base. To convert drain condensate out the front of unit: 1. Remove evaporator access panel and supply airaccess panels. 2. Remove the support panel that the condensate drain pan exits through. 3. Slide the condensate drain pan out of the unit and rotate 180°. 4. Slide the condensate drain pan back into the unit, align the drain with the grommeted opening in the rear support panel and push until the coupling is seated in the grommet. 5. Replace the front support panel by aligning the panel with tabs in the raceway. Align the condensate drain pan support in the grommeted hole as the panel is put in place. 6. Replace evaporator access panel and supply air access panels. To convert drain condensate through -the base of unit: 1. Remove evaporator access panel and supply air access panels. 2. Remove the support panel that the condensate drain pan exits through. 3. Slide the condensate drain pan out of the unit. 4. Place on a level surface in the position it was removed from the unit. 5. Remove the plug knockout in the bottom of the drain pan to convert it to through -the -base drainage. 6. Plug the original condensate drain opening with a field supplied 3/4" NPT plug. 7. Slide the condensate drain pan back into the unit, align the drain support with the grommeted opening in the rear support panel and push until the support is seated in the grommet. 8. Replace the front support panel by aligning the panel with tabs in the raceway. Align the plugged condensate drain pan coupling in the grommeted hole as the panel is put in place. 9. Replace evaporator access panel and supply air access panels. A condensate trap must be installed at the unit due to the drain connection being on the "negative pressure" side of RT-SVX21 AB-E N 37 aTRANE` Installation the fan. Install the P-Trap using the guidelines in Figure 55, p. 38. A condensate drain line must be connected to the p-trap. Pitch the drain lines at least 1/2 inch for every 10 feet of horizontal run to assure proper condensate flow. Do not allow the horizontal run to sag causing a possible double - trap condition which could result in condensate backup due to "air lock". Figure 55. Condensate trap installation PANEL ENCLOSURE 75 INCH NPT ,--FEMALE CONNECTOR Field Installed Power Wiring Proper Field Wiring and Grounding Required! Failure to follow code could result in death or serious injury. All field wiring MUST be performed by qualified personnel. Improperly installed and grounded field wiring poses FIRE and ELECTROCUTION hazards. To avoid these hazards, you MUST follow requirements for field wiring installation and grounding as described in NEC and your local/state electrical codes. An overall dimensional layout for the field installed wiring 1,5/, entrance into the unit is illustrated in the Dimensions and 38.1 MM Weights chapter. To insure that the unit's supply power wiring is properly sized and installed, followthe following guidelines. Verify that the power supply available is compatible with the unit's nameplate ratings. The available supply power must be within 10% of the rated voltage stamped on the CLLAHOUT nameplate. Use only copper conductors to connect the PLiLL, power supply to the unit. Drain Pan Removal (Units with Condensate Overflow Switch Option) Before drain pan removal, the switch wire must be disconnected from wire tie on panel and/or any tape before drain pan can be removed. Care must be taken so the wire does not catch on the bottom of indoor coil or any protrusion. Note: When reversing the drain pan, on some units, the condensate overflow switch will need to be moved to the second hole in its bracket to avoid contact with headers or indoor coil. Filter Installation • Use Copper Conductors Only! Failure to use copper conductors could result in equipment damage as unit terminals are not designed to accept other types of conductors. Important: If the unit is not equipped with an optional factory installed non -fused disconnect switch or circuit breaker, a field supplied disconnect switch must be installed at or near the unit in accordance with the National Electrical Code (NEC latest edition). The quantity of filters is determined by unit size. Accessto Main Unit Power the filters is obtained by removing the filter access panel. Refer to the unit Service Facts (shipped with each unit) for filter requirements. Note: Do not operate the unit without filters. Proper Field Wiring and Grounding Required! Failure to follow code could result in death or serious injury. All field wiring MUST be performed by qualified personnel. Improperly installed and grounded field wiring poses FIRE and ELECTROCUTION hazards. To avoid these hazards, you MUST follow requirements for field wiring installation and grounding as described in NEC and your local/state electrical codes. 38 RT-SVX21AB-EN Hazardous Voltage! Failure to disconnect power before servicing could result in death or serious injury. Disconnect all electric power, including remote disconnects before servicing. Follow proper lockout/tagout procedures to ensure the power can not be inadvertently energized. Standard Wiring 1. Location of the applicable electrical service entrance is illustrated in the Dimensions and Weights chapter. Complete the unit's power wiring connections at Compressor Contactor# 1 (CC1) inside the unit control panel. Refer to the customer connection diagram that is shipped with the unit for specific termination points 2. Provide proper grounding for the unit in accordance with local and national codes. Optional TBUE Wiring (Through -the -Base Electrical Option) 1. Location of the applicable electrical service is illustrated below. Refer to the customer connection diagram that is shipped with the unit for specific termination points. Thetermination points, depending on the customer option selected would be a factory mounted non -fused disconnect switch (UDC) or circuit breaker (UCB). If neither a factory mounted non -fused disconnect switch (UDC) or circuit breaker (UCB) was factory mounted, field wiring connections should be terminated in the control box at Compressor Contactor # 1 (CC1). 2. Provide proper grounding for the unit in accordance with local and national codes. Note: Black Gasket is shipped from the factory and is located in the literature ship -with bag in the control box. Apply Black Gasket around conduit plate on all 4 sides after installation to prevent air leakage from the building entering the electrical enclosures. Note: Seal between wiring and conduitwith Black Gasket or weather proof sealer to prevent air leakage from the building entering the electrical enclosures. Also seal around conduit and wiring at all roof and curb penetrations. Figure 56. All units except 10 ton high efficiency units qWTRANE Installation SEAL BETWEEN WIRING AND CONDUIT WITH WEATHER PROOF SEALER TO PREVENT AIR LEAKAGE FIELD POWERED CONTROL WIRING CONVENIENCE OUTLET CONDUIT -` I CONDUIT POWER WIRING CONDUIT BLACK GASKET__,�� Figure 57. 10 ton high efficiency units SEAL BETWEEN I O �i III I WIRING AND ` CONDUITWITH WEATHERPROOF SEALER TO PREVENT AIR LEAKAGE FIELD POWERED CONTROL WIRING CONVENIENCE OUTLET CONDUIT— CONDUIT CONTROL WIRING BLACK GASKET f CONDUIT Field -Installed Control Wiring Hazardous Voltage! Failure to disconnect power before servicing could result in death or serious injury. Disconnect all electric power, including remote disconnects before servicing. Follow proper lockout/tagout procedures to ensure the power can not be inadvertently energized. RT-SVX21 AB-E N 39 aTRANE` Installation Proper Field Wiring and Grounding Required! Failure to follow code could result in death or serious injury. All field wiring MUST be performed by qualified personnel. Improperly installed and grounded field wiring poses FIRE and ELECTROCUTION hazards. To avoid these hazards, you MUST follow requirements for field wiring installation and grounding as described in NEC and your local/state electrical codes. An overall layout of the various control options available with the required number of conductors for each control device is illustrated in Figure 58, p. 41 and Figure 59, p. 41. Note: All field wiring must conform to NEC guidelines as well as state and local codes. Control Power Transformer The 24volt control power transformers are to be used only with the accessories called out in this manual. Transformers rated greater than 50 VA are equipped with internal circuit breakers. If circuit breaker trips, turn "Off" all power to the unit before attempting to reset it. Hazardous Voltage! Failure to disconnect power before servicing could result in death or serious injury. Disconnect all electric power, including remote disconnects before servicing. Follow proper lockout/tagout procedures to ensure the power can not be inadvertently energized. Note: Be sure to check all loads and conductors for grounds, shorts, and mis-wiring. 3. Do not run the AC low voltage wiring in the same conduit with the high voltage power wiring. 4. Route low voltage wiring per illustrations on page 42. Table 9. Electromechanical thermostat 24V AC conductors with ReliaTelT°° Distance from Unit to Control 000 - 460 feet 000 - 140 m Recommended Wire Size 18 gauge 0.75 mm2 461 - 732 feet 16 gauge 141-223m 1.3mm2 733 - 1000 feet 14 gauge 224 - 305 m 2.0 mm2 Table 10. Electromechanical thermostat 24V AC conductors with electromechanical unit Distance from Unit to Control Recommended Wire Size 0 - 30 feet 22 gauge 0-9.1m 0.33m2 31 - 50 feet 20 gauge 9.5-15.2m 0.50m2 51 - 75 feet 18 gauge 15.5-22.9m 0.75m2 76 - 125 feet 16 gauge 23.1-38.1m 1.3m2 126 - 200 feet 14 gauge 38.4-60.9m 2.0m2 The transformer is located in the control panel. The circuit Controls using DC Analog Input/Outputs (Standard Low Voltage Multi breaker is located on the left side of the transformer and can be reset by pressing in on the black reset button. conductor Wire) Controls Using 24 Vac Before installing any connecting wiring, refer to the Dimensions and Weights chapter for the electrical access locations provided on the unit and Table 9, p. 40 or Table 10, p. 40 for AC conductor sizing guidelines, and; 1. Use copper conductors unless otherwise specified. 2. Ensure that the AC control wiring between the controls and the unit's termination point does not exceed three (3) ohms/conductor for the length of the run. ■ • Controls Using 24 VAC! Resistance in excess of 3 ohms per conductor could cause component failure due to insufficient AC voltage supply. Before installing any connecting wiring between the unit and components utilizing a DC analog input\output signal, refer to the Dimensions and Weights chapter for the electrical access locations provided on the unit. • Table 11, p. 41 lists the conductor sizing guidelines that must be followed when interconnecting the DC binary output devices and the system components utilizing a DC analog input/output signal to the unit. Notes: Resistance in excess of 2.5 ohms per conductor can cause deviations in the accuracy of the controls. Notes: Ensure that the wiring between controls and the unit's termination point does not exceed two and a half (2.5) ohms/conductor for the length of the ru n. • Do not run the electrical wires transporting DC signals in or around conduit housing high voltage wires. • Route low voltage wiring per illustrations on page 42. 40 RT-SVX21 AB-E N DC Conductors Table 11. Zone sensor module wiring Distance from Unit to Control Recommended Wire Size 0 - 150 feet 22 gauge 0 - 45.7 m 0.33 mm2 151 - 240 feet 20 gauge 46 - 73.1 m 0.50 mm2 241 -385 feet 18 gauge 73.5 - 117.3 m 0.75 mm2 386 - 610 feet 16 gauge 117.7 - 185.9 m 1.3 mm2 611 - 970 feet 14 gauge 186.2 - 295.7 m 2.0 mm2 Figure 58. Typical field wiring diagrams for electromechanical ELECTRO MECHANICAL THERMOSTAT GAS / ELECTRIC UNITS THERMOSTAT ,—WIRENUTS UNIT 111 R RED 10 CC III W1 BROWN 173A G Y1 qWTRANE Installation Figure 59. ReliaTelTM conventional thermostat field wiring diagrams(a) RTRM THERMOSTAT RC -- J7-1 124 VAC) HEAT HEAT 1 W1 J7-3 OFF HEAT 2 42 J7-5 COOL )OL �- J7-4 AUTO FAN -OFF HEAT RH J7-9 ]OL COOL' _ J7-2 oOF Y 1 COOL2 o _2 J7-6 HEAT (a) Not compatible with VAV units. Figure 60. ReliaTelTM options module (RTOM board) je J4 J9 J10 ill 0000 00 2 1.6 J3 0 00 O 00 0 J6 000000 t--o--o--o--C J7 Figure 61. ReliaTelTM relative humidity sensor (dehumidification option) LOW VOLTAGE TERMINAL BLOCK NLTB NLTB RELATIVE HUMIDITY 12 ® ® 13 SENSOR NLTB (FIELD SUPPLIED) LOCATED ON FRONT 14 ® ® 15 OF ROOFTOP UNIT CONTROL BOX 16 ® ® 17 I 18 ® ® 19 p R.H.*I I R.H.- I 0 FIELD SUPPLIED CABLE RT-SVX21 AB-E N 41 qWTRANE Installation Figure 62. ReliaTelT" humidistat (dehumidification option) LOW VOLTAGE TERMINAL BLOCK LTB 7 [� 8 HUMIDISTAT LTB LOCATED ON FRONT 9 ® ®10 (FIELD SUPPLIED) OF ROOFTOP UNIT — — CONTROL BOX 11 ® 9� 12 I f b HI 13 ® 9914 ❑�M r—C ---� FIELD SUPPLIED WIRE Figure 63. Electromechanical control customer low voltage routing (all units except 10 ton high efficiency) ELECTRO MECHANICAL TBU WIRING ROUTE FIELD WIRING AS SHOWN AND SECURE WITH 3 WIRE TIES TBU OPTION 00 UNPOWERED CONVENIENCE OUTLET SECURE FIELD INSTALLED WIRING -FOR CONVENIENCE I OUTLET WITH POP -IN WIRE TIE Figure 64. ReliaTelTM control customer low voltage routing (all units except 10 ton high efficiency) REFRIGERATION COMMUNICATION MODULE JINTERFACE _._...... LTB RELIATEL CONVENTIONAL WIRING ROUTE FIELD WIRING AS SHOWN AND SECURE WITH 2 WIRE TIES REFRIGERATION COMMUNICATION MODULE INTERFACE LTB RELIATEL TBU WIRING ROUTE FIELD WIRING AS SHOWN TBU AND SECURE WITH 3 WIRE TIES OPTION UNPOWERED CONVENIENCE OUTLET SECURE FIELD INSTALLED WIRING r-FOR CONVENIENCE IOUTLET WITH POP -IN WIRE TIE 42 RT-SVX21 AB-E N Figure 65. ReliaTelT°" (without TBUE) control customer wire routing (10 ton high efficiency) Figure 66. ReliaTelT" (with TBUE) control customer wire routing (10 ton high efficiency) -.EaFA E wMM� o� a�ooaao,�oE0.oaE. CONNECTION DIAGRAM C qWTRANE Installation RT-SVX21AB-EN 43 qWTRANE Installation Figure 67. Electromechanical (without TBUE) control customer wire routing (10 ton high efficiency) ENTER CONTROL BOX THROUGH HOLE IN OUTDOOR DIVIDER PANEL. SECURE FIELD WIRING WITH POP -IN WIRE TIE NEAR HOLE IN OUTDOOR DIVIDER PANEL. ENTER UNIT THROUGH HOLE IN POST. ss E • -- 1 e .I- M� i ,_ I 9L-_.i r 1IaII = T ■"ii o �_ I (r11 Figure 68. Electromechanical (with TBUE) control customer wire routing (10 ton high efficiency) ENTER CONTROL BOX THROUGH HOLE IN OUTDOOR DIVIDER PANEL. SECURE FIELD WIRING WITH POP -IN WIRE TIE NEAR HOLE IN OUTDOOR DIVIDER PANEL. ROUTE FIELD WIRING ALONG SIDE OF TBUE WRAPPER. SECURE WITH SCREW -IN WIRE TIES. CONNECTION DIAGRAM eIn CONVENIENCE I \ `EXIT TBUE ENCLOSURE THROUGH OUTLET HOLE IN WRAPPER. THE BASE. 44 RT-SVX21 AB-E N Space Temperature Averaging (ReliaTelT11 Only) Space temperature averaging is accomplished by wiring a number of remote sensors in a series/parallel circuit. Using the BAYSENS016* or BAYSENS077*, at least four sensors are required to accomplish space temperature averaging. See diagram below. • Example #1 illustrates two series circuits with two sensors in each circuit wired in parallel. The square of any number of remote sensors is required. Figure 69. Examples EXAMPLE #1 ZSM REMOTE SENSORS #1 M2 #3 r iY4 r 1 : o- -- - - -- -- J---------I 2 EXAMPLE #2 ZSM REMOTE SENSORS #1 #2 #3 O I L� 2 P� #4 1 I /{8#9LL --- --- �-- 1 EXAMPLE #3 ZSM REMOTE SENSORS #1 #2 O 1 2 TRANE Installation • Example #2 illustrates three sensors squared in a series/parallel circuit. Using BAYSENS077*, two sensors are required to accomplish space temperature averaging. • Example #3 illustrates the circuit required for this sensor. Table 12, p. 47 lists the temperature versus resistance coefficient for all sensors. Remote Sensor #1 Remote Sensor #2 VVVV VVVV Remote Sensor #3 Remote Sensor #4 VVVV VVVV ZSM ZSM TERMINAL # 1 TERMINAL # 2 Remote Sensor #1 Remote Sensor #2 Remote Seneor #3 VVVV��VVV01�VVVV Remote Sensor #4 Remote Seneor #5 Remote Seasor #6 VVVV\-�VVVV�-�VVVV Remote Sensor #7 Remote Seneor #R Remote Seasor #9 VVVV\'�VVVV��VVVV ZSM ZSM TERMINAL # 1 TERMINAL # 2 Remote Sensor #1 Remote Sensor #2 VVVVVVVV VVUV VVVV ZSM ZSM TERMINAL # 1 TERMINAL # 2 Note: Wiring pin numbers are for reference only. There are multiple smoke detector systems that could have differently numbered pins. For correctwiring details, please refer to the specific smoke detector literature that accompanied this unit. RT-SVX21 AB-E N 45 qWTRANE Installation Figure 70. Typical field wiring diagrams for optional controls (ReliaTelTM only) RTRM 1 2 3 A 5 6 1 8 9 10 II 12 IA 0 0 0 0 0 0 0 0 0 0 0 IL--------- I I `---------I I I 00005 TB1 BAYSENS706* ZONE SENSOR RTRM 1 2 3 A 5 6 7 8 9 10 11 12 IU J6 0 0 0 0 0 0 0 0 0 0 0 0 I I I I L I I BAYSEN5073* ZONE SENSOR ICS WITH OVERRIDE AND CANCELLATION BUTTON WME4C' slop II r---- i 0 @ ' I I I n warn rev E RaNcr slap oEvim RE FACf�OR1' SIRMB AOKR RTRM 1 2 3 A 5 6 7 8 9 10 II 12 M J6 O Q O O Q 0 0 0 0 0 0 0 0 I I I I L I I I 1 BAYSENS075* ASYSTAT669A I OPTION REMOTE 2 3 SENSOR T81 �IA- �' BAYSEN5108* ZONE SENSOR CUT WIRE JUMPER R11 ADJACENT TO TEMPERATURE SLIDES ON ZONE SENSOR WHEN OPTIONAL REMOTE SENSOR IS USED. RTRM 1 2 3 1 5 6 7 0 9 10 II 12 IA J6 0 0 0 0 0 0 0 0 0 0 0 I I IL L_____ L------ I I I I I ob© BAYSEN5074* ZONE SENSOR ICS WITH SETPOINT,OVERRIDE AND CANCELLATION BUTTON n BAYFRS7003A b� ------------------ I I RE FAMr�j�BRRY I I B ,�AbER L J 5RD017 % \ N'gh LEI C"d Rei— No X1310004001 Rlg6 LIMI Cmlra %131000e002 RTRM 1 2 3 A 5 6 7 8 9 10 11 12 14 .S 0 0 0 0 0 0 0 0 0 0 0 0 0 ' l l l l l L I I I I BAYSENS075* ASYSTAT669AOPTION I I I I I I I I I I REMOTE 2 O3O 5 ©©®9O® SENSORBAYST81 'ON, SENSOR NSOR ZONE 2 CUT WIRE JUMPER R11 ADJACENT TO TEMPERATURE SLIDES ON ZONE SENSOR WHEN OPTIONAL REMOTE SENSOR IS USED. RTRM 12 3 A 5 6 7 8 9 10 11 12 IA A 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 BAYSENS119* ASYSTAT666A iiiii ' 1 ----- ZONE SENSOR I I I I I!! ' BAYIENS075* I ' ' ' l ' II I ASYSTAT669A 1 1 1 1 1 1 1 OPTIONAL REMOTE SENSOR _ ECA 71N4 P - I POS I I I I I I �IFTmum P.Rr. P.I., Rme1. I I ue Re � I I NOTE BAYSTAT023A 46 RT-SVX21 AB-E N Table 12. Temperature vs. resistance Temperature Degrees OF Degrees °C Nominal Resistance -200 -28.90 170.1 K - Ohms -150 -26.10 143.5 K - Ohms -100 -23.30 121.4 K - Ohms -50 -20.60 103.0 K - Ohms 00 -17.80 87.56 K - Ohms 50 -15.00 74.65 K - Ohms 100 -12.20 63.80 K - Ohms 150 -9.40 54.66 K - Ohms 200 -6.70 46.94 K - Ohms 250 -3.80 40.40 K - Ohms 300 -1.10 34.85 K - Ohms 351 1.70 30.18 K - Ohms 400 4.40 26.22 K - Ohms 450 7.20 22.85 K - Ohms 500 10.00 19.96 K - Ohms 550 12.80 17.47 K - Ohms 600 15.60 15.33 K - Ohms 651 18.30 13.49 K - Ohms 700 21.10 11.89 K - Ohms 750 23.90 10.50 K - Ohms 800 26.70 9.297 K - Ohms 850 29.40 8.247 K - Ohms 900 32.20 7.330 K - Ohms 950 35.00 6.528 K - Ohms Table 13. Sizing natural gas pipe mains and branches Iron Pipe Size (IPS) Inches Length of Pipe (Ft.) 1/2 n Pipe 3/4n Pipe V Pipe 11/4 n Pipe 11/2 n Pipe 15 76 176 345 750 1220 30 52 120 241 535 850 45 43 99 199 435 700 60 38 86 173 380 610 75 77 155 345 545 Note: Capacity of Pipe of Different Diameters and Lengths in Cu. Ft. Per Hr. with Pressure Drop of 0.3" and Specific Gravity of 0.60 qWTRANE Installation Table 14. Iron pipe size (SI) millimeters Iron Pipe Size (SI) Millimeters Length of Pipe (Meters) 15 mm Pipe 20 mm Pipe 25 mm Pipe 32 mm Pipe 40 mm Pipe 4.6 2.15 4.98 9.76 21.23 34.54 9.1 1.47 3.39 6.82 15.14 24.06 13.7 1.21 2.80 5.63 12.31 19.82 18.3 1.07 2.43 4.89 10.76 17.27 22.9 - 2.18 4.38 9.76 15.40 Note: Capacity of Pipe of Different Diameters and Lengths in Cu. Meter Per Hr. with Pressure Drop of 74.6 Pa and Specific Gravity of 0.60. Figure 71. Schematic diagram for field gas piping to unit 116' NPT Test Plug Field supplied Groundg" MIN \ Union To Gas Train as Supply Line Gas shutoff (Field Supplied \nit Access Ho Fe - outside unit cabinet.) Drip Leg RT-SVX21 AB-E N 47 0 TRANE` Pre -Start Use the checklist provided below in conjunction with the "General Unit Requirements" checklist to ensure that the unit is properly installed and ready for operation. Hazardous Voltage w/Capacitors! Failure to disconnect power and discharge capacitors before servicing could result in death or serious injury. Disconnect all electric power, including remote disconnects and discharge all motor start/run capacitors before servicing. Follow proper lockout/ tagout procedures to ensure the power cannot be inadvertently energized. Verify with an appropriate voltmeter that all capacitors have discharged. For additional information regarding the safe discharge of capacitors, see PROD-SVB06A-EN Verify that the condenser airflow will be unobstructed. Rotating Components! Failure to follow all safety precautions below could result in rotating components cutting and slashing technician which could result in death or serious injury. During installation, testing, servicing and troubleshooting of this product it may be necessary to work with live and exposed rotating components. Have a qualified or licensed service individual who has been properly trained in handling exposed rotating components, perform these tasks. • Verify that the condenser fan and indoor blower turn freely without rubbing and are properly tightened on the shafts. • Check the supply fan belts for proper tension and the fan bearings for sufficient lubrication. If the belts require adjustment, or if the bearings need lubricating, refer to the maintenance section of this manual for instructions. • Verifythat a condensatetrap is installed and the piping is properly sized and pitched. • Verify that the correct size and number of filters are in place. • Inspect the interior of the unit for tools and debris and install all panels in preparation for starting the unit. Voltage Imbalance Three phase electrical power to the unit must meet stringent requirements for the unit to operate properly. Measure each leg (phase -to -phase) of the power supply. Each reading must fall within the utilization range stamped on the unit nameplate. If any of the readings do not fall within the proper tolerances, notify the power company to correct this situation before operating the unit. Excessivethree phase voltage imbalance between phases will cause motors to overheat and eventually fail. The maximum allowable voltage imbalance is 2%. Measure and record the voltage between phases 1, 2, and 3 and calculate the amount of imbalance as follows: % Voltage Imbalance= 100 x AVA - VD where; AV (Average Voltage)= Volt 1 + Volt 2 + Volt 3 V1, V2, V3 = Line Voltage Readings VD = Line Voltage reading that deviates the farthest from the average voltage. Example: If the voltage readings of the supply power measured 221, 230, and 227, the average volts would be: 221 + 230 + 227 = 226 Avg. 3 VD (reading farthest from average) = 221 The percentage of imbalance equals: 100x226-221 =22% 226 The 2.2% imbalance in this example exceeds the maximum allowable imbalance of 2.0%. This much imbalance between phases can equal as much as a 20% current imbalance with a resulting increase in motor winding temperatures that will decrease motor life. If the voltage imbalance is over 2%, notify the proper agencies to correct the voltage problem before operating this equipment. Electrical Phasing (Three Phase Motors) The compressor motor(s) and the supply fan motor are internally connected for the proper rotation when the incoming power supply is phased as A, B, C. Proper electrical supply phasing can be quickly determined and corrected before starting the unit by using an instrument such as an Associated Research Model 45 Phase Sequence Indicator and following the steps below: • Turn the field supplied disconnect switch that provides power to the main power terminal block or to the "Line" side of the optional factory mounted disconnect switch to the "Off" position. • Connect the phase sequence indicator leads to the terminal block or to the "Line" side of the optional factory mounted disconnect switch as follows; Black (phase A) to L1 Red (phase B) to L2 Yellow (phase C) to L3 48 RT-SVX21 AB-E N • Close the field supplied main power disconnect switch or circuit protector switch that provides the supply power to the unit. Note: Upon closing main power disconnect and the unit mounted disconnect switch or circuit breaker, the phase monitorwill verify proper phasing. If LED on face of the monitor is red, correct supply power fault. Live Electrical Components! Failure to follow all electrical safety precautions when exposed to live electrical components could result in death or serious injury. When necessary to work with live electrical components, have a qualified licensed electrician or other individual who has been properly trained in handling live electrical components perform these tasks. To prevent injury or death from electrocution, it is the responsibility of the technician to recognize this hazard and use extreme care when performing service procedures with the electrical power energized. • ObservetheABC and CBAphase indicator lights onthe face of the sequencer. TheABC indicator lightwill glow if the phase is ABC. If the CBA indicator light glows, open the disconnect switch or circuit protection switch and reverse any two power wires. • Restore the main electrical power and recheck the phasing. If the phasing is correct, open the disconnect switch or circuit protection switch and remove the phase sequence indicator. Compressor Crankcase Heaters (Optional) Each compressor can be equipped with a crankcase heater (on some units the crankcase heater comes standard). The proper operation of the crankcase heater is important to maintain an elevated compressor oil temperature during the "Off" cycle to reduce oil foaming during compressor starts. Oil foaming occurs when refrigerant condenses in the compressor and mixes with the oil. In lower ambient conditions, refrigerant migration to the compressor could increase. When the compressor starts, the sudden reduction in crankcase pressure causes the liquid refrigerant to boil rapidly causing the oil to foam. This condition could damage compressor bearings due to reduced lubrication and could cause compressor mechanical failures. Before starting the unit in the "Cooling" mode, set the system switch to the "Off" position and turn the main power disconnect to the "On" position and allow the crankcase heater to operate a minimum of 8 hours. Before closing the main power disconnect switch, insure thatthe "System" selection switch is in the "Off' position and the "Fan" selection switch is in the "Auto" position. aTRANE` Pre -Start Close the main power disconnect switch and the unit mounted disconnect switch, if applicable. Note: Upon closing main power disconnect and the unit mounted disconnect switch or circuit breaker, the phase monitorwill verify proper phasing. If LED on face of the monitor is red, correct supply power fault. Live Electrical Components! Failure to follow all electrical safety precautions when exposed to live electrical components could result in death or serious injury. When necessary to work with live electrical components, have a qualified licensed electrician or other individual who has been properly trained in handling live electrical components perform these tasks. To prevent injury or death from electrocution, it is the responsibility of the technician to recognize this hazard and use extreme care when performing service procedures with the electrical power energized. ReliaTelT"' Controls Upon power initialization, the RTRM performs self - diagnostic checks to insure that all internal controls are functional. It also checks the configuration parameters against the components connected to the system. The Liteport LED located on the RTRM module is turned "On" within one second of power -up if internal operation is okay. Use one ofthefollowing "Test" procedureto bypass some time delays and to start the unit at the control panel. Each step of unit operation can be activated individually by temporarily shorting across the "Test' terminals for two to three seconds. The Liteport LED located on the RTRM module will blink when the test mode has been initiated. The unit can be left in any "Test' step for up to one hour before it will automatically terminate, or it can be terminated by opening the main power disconnect switch. Once the test mode has been terminated, the Liteport LED will glow continuously and the unit will revert to the "System" control. RT-SVX21 AB-E N 49 aTRANE` Pre -Start Table 15. Service test guide for component operation PWM Multi -Speed Fan Test Step Mode Fan Econ (a) Comp i Comp 2 Heat 1 Heat 2 Resistance Output(b) Output Minimum Fan On Position Off Off Off Off 1 Setpoint 0% 2.21<0 50% low Minimum On Selectable Off Off Off Off Ventilation 2 Economizer On Open Off Off Off Off 3.3KQ 500/b<0 low Test Open 3 Cool On Minimum On (d) Off Off Off 4.71<0 82% low Stage 1 Position 4 (e) Cool On Minimum On (d) On (d) Off Off 6.8KQ 100% High (2-step cooling) Stage 2 Position Low (3-step cooling) 5 (e) Cool On Minimum On (d) On (d) Off Off 8.2KQ 100% High Stage 3 Position 6 (e) Reheat On Minimum On On Off Off 33KO 100%(f) High 7 (e) Heat On Minimum Off Off On Off 10KO 100% High Stage 1 8 (e) Heat On Minimum Off Off On On 15KO 100% High Stage 2 (a) The exhaust fan will turn on anytime the economizer damper position is equal to or greater than the exhaust fan setpoint. (b)The PWM Output is in reference to the user selected maximum unit fan speed. (c) Regardless of the Economizer Mode configuration, the unit will run the Supply Fan at the minimum speed during the Economizer step of the Service Test. (d)The condenser fans will operate any time a compressor is 'On' providing the outdoor air temperatures are within the operating values. (e) Steps for optional accessories and non -applicable modes in unit will be skipped. (f) Units with Enhanced Dehumidification only will not perform this step during Service Test. Test Modes There are three methods in which the "Test" mode can be cycled at LTB-Test 1 and LTB-Test 2. 1. Step Test Mode - This method initiates the different components of the unit, one at a time, by temporarily shorting across the two test terminals for two to three seconds. For the initial start-up of the unit, this method allows the technician to cycle a component "On" and have up to one hour to complete the check. 2. Resistance Test Mode - This method can be used for start-up providing a decade box forvariable resistance outputs is available. This method initiates the different components of the unit, one at a time, when a specific resistance value is placed across the two test terminals. The unitwill remain in the specifictest mode for approximately one hour even though the resistance is left on the test terminals. 3. Auto Test Mode - This method is not recommended for start-up due to the short timing between individual component steps. This method initiates the different components of the unit, one at a time, when a jumper is installed across the test terminals. The unit will start the first test step and change to the next step every 30 seconds. At the end of the test mode, control of the unit will automatically revert to the applied "System" control method. For unit test steps, test modes, and step resistance values to cycle the various components, refer to Table 15, p. 50. ReliaTelT"" Controls Upon power initialization, the Gas Ignition Module (IGN) performs self -diagnostic checks to insure that all internal controls are functional. It also checks the configuration parameters against the components connected to the system. The System LED located on the IGN module is turned "On" within one second of power -up if internal operation is okay. Electromechanical Controls Test Procedure See unit schematic for correct wire numbers. Fan Test and Minimum Ventilation Connect red thermostat wire (R) to black thermostat wire (G). Economizer Cooling Connect a jumper wire across OTS on Economizer Control (ECA). Connect red thermostat (R) wire to yellow thermostat wire (Y1). Cool 1 Connect red thermostat wire (R) to yellow thermostat wire (Y1). 50 RT-SVX21AB-EN aTRANE` Pre -Start Cool 2 Connect red thermostat wire (R) to yellow thermostat wire (Y2). Heat 1 Connect red thermostat wire (R) to brown thermostat wire (W1). Heat 2 Connect red thermostat wire (R) to brown thermostat wire (W2). RT-SVX21 AB-E N 51 0 TRANE` Unit Start -Up Sequence of Operation Units are offered with two control options, electromechanical or ReliaTeIT11 Note: Refer to the unit nameplate: If the 9th digit of the model number = R, proceed with the ReliaTeIT"" Controls section within this chapter. If the 9th digit of the model number = E, proceed with the Electromechanical Controls section within this chapter. Note: The optional condensate overflow switch (COF) will shut the unit down if the float is raised and the switch is closed. ReliaTelT"' Controls ReliaTelTI Controls - Constant Volume (CV) ReliaTeIT°" control is a microelectronic control feature, which provides operating functions that are significantly different than conventional electromechanical units. The master module is the ReliaTelT"' refrigeration module (RTRM). The RTRM provides compressor anti -short cycle timing functions through minimum "Off" and "On" timing to increase reliability, performance and to maximize unit efficiency. Upon power initialization, the RTRM performs self - diagnostic checks to insure that all internal controls are functioning. It checks the configuration parameters against the components connected to the system. The LED located on the RTRM module is turned "On" within one second after power -up if all internal operations are okay. ReliaTelT"' Control Cooling without an Economizer When the system switch is set to the "Cool" position and the zone temperature rises above the cooling setpoint control band, the RTRM energizes the (K9) relay coil located on the RTRM. When the K9 relay contacts close, the compressor contactor (CC1) coil is energized provided the low pressure control (LPC1), high pressure control (HPC1) and discharge line thermostat (TDL 1) are closed. When the CC1 contacts close, compressor (CPR1) and the outdoor fan motor (ODM) start to maintain the zone temperature to within ± 2°F of the sensor setpoint at the sensed location. If the first stage of cooling can not satisfy the cooling requirement, the RTRM energizes the (K10) relay coil located on the RTRM. When the (K10) relay contacts close, the compressor contactor (CC2) coil is energized provided the low pressure control (LPC2), high pressure control (HPC2) and discharge line thermostat (TDL 2) are closed. When the CC2 contacts close, compressor (CPR2) starts to maintain the zone temperature to within ± 2°F of the sensor setpoint at the sensed location. Three -Stages of Cooling Note: High efficiency units only. When the unit is configured for three -stage cooling, and the system switch is set to the cool position and the zone temperature rises above the cooling setpoint control band, the RTRM energizes the (K10) relay coil located on the RTRM. When the (K10) relay contacts close, compressor contactor (CC2) is energized. This is the smaller of the two compressors (CPR2). This staging order is opposite standard staging order. If the first stage of cooling can not satisfy the cooling requirement, the RTRM energizes the (K9) relay coil and de -energizes the (K10) relay coil on the RTRM. Compressor contactor (CC1) is energized, bringing on the larger of the two compressors (CPR1). Compressor contactor (CC2) is de -energized, turning off the smaller compressor. If the second stage of cooling can not satisfy the cooling requirement, the RTRM keeps the (K9) relay coil energized and energizes the (K10) relay coil. Compressor contactors (CC1) and (CC2) are energized, and both compressors (CPR1 and CPR2). Lead/Lag is disabled with three -stage cooling. A unit configured for three -stage cooling and controlled with a thermostat will operate as a two -stage unit. ReliaTelTM Control Evaporator Fan Operation (for Gas Units) When the fan selection switch is setto the "Auto" position, the RTRM energizes the (K6) relay coil approximately 1 second after energizing the compressor contactor coil (CC1) in the cooling mode. In the heating mode, the RTRM energizesthe (K6) relay coil approximately45 second after gas ignition. Closing the (K6) contacts on the RTRM energizesthe indoorfan relay (F) coil to startthe indoorfan motor (IDM). The RTRM de -energizes the fan relay (F) approximately 60 seconds after the cooling requirement has be satisfied to enhance unit efficiency. When the heating cycle is terminated, the indoor fan relay (F) coil is de -energized approximately 90 seconds after the heating requirement. When the fan selection switch is set to the "On" position, the RTRM keeps the indoor fan relay coil (F) energized for continuous fan motor operation. 52 RT-SVX21AB-EN When the unit is equipped with the optional clogged filter switch, wired between terminals J7-3 and J7-4 on the ReliaTeIT°^ options module (RTOM), the RTRM produces an analog output if the clogged filter switch (CFS) closes fortwo minutes after requestforfan operation. When the system is connected to a remote panel, the "SERVICE" LED will be turned on when this failure occurs. ReliaTelT"' Control Evaporator Fan Operation (for Cooling Only Units) When the fan selection switch is setto the "Auto" position, the RTRM energizes the (K6) relay coil approximately 1 second after energizing the compressor contactor coil (CC1) in the cooling mode. In the heating mode, the RTRM energizes the (K6) relay coil approximately 1 second before energizing the electric heat contactors. Closing the (K6) contacts on the RTRM energizes the indoor fan relay (F) coil to start the indoor fan motor (IDM). The RTRM de - energizes the fan relay (F) approximately 60 seconds after the cooling requirement has be satisfied to enhance unit efficiency. When the heating cycle is terminated, the indoor fan relay (F) coil is de -energized at the same time as the heater contactors. When the fan selection switch is set to the "On" position, the RTRM keeps the indoor fan relay coil (F) energized for continuous fan motor operation. When the unit is equipped with the optional clogged filter switch, wired between terminals J7-3and J7-4 on the ReliaTeIT°^ options module (RTOM), the RTRM produces an analog output if the clogged filter switch (CFS) closes for two minutes after a request for fan operation. When the system is connected to a remote panel, the "SERVICE" LED will be turned on when this failure occurs. Low Ambient Operation Note: For ReliaTeITM units only During low ambient operation, outside air temperature below 55°F, the RTRM will cycle the compressor and outdoor fan motor "Off" for approximately 3 minutes after every 10 minutes of accumulated compressor run time. The indoorfan motor (IDM) will continue to operate during this evaporator defrost cycle (EDC) and the compressor and outdoor fan will return to normal operation once the defrost cycle has terminated and the compressor "Off" time delay has been satisfied. Note: Units with the dehumidification option - When in dehumidification mode, the unit will not cycle as described above. The unit will run continuously in dehumidification mode at all ambient conditions above 40°F. Dehumidification is disabled at ambient conditions below 40°F. aTRANE` Sequence of Operation Multi -Speed Indoor Motor Note: Multi -speed indoorfan available only on6,7.5(dual compressor) and 8.5 tons high efficiency, and 10 ton products with ReliaTeITI controls. Note: Multi -speed indoor fan standard for 17 Plus. Models configured for the multi -speed indoor motor will be controlled via the 0-10 Vdc or PWC indoor fan speed output located on the RTOM. R136 (DA COOL —FAN SPD) potentiometer on the RTOM sets the maximum motor speed. Note that the potentiometer voltage readings can be verified via 2-position harness connector located adjacenttothe RTOM. The unit schematicwill illustratethe exact location. Use a DC voltmeter to read the voltage between the two terminals. Provisions have been made in Service TEST Mode to allow for maximum motor speed adjustment. Motor may be adjusted using modes listed below. Reference the RPM table in the Performance Data section for fan speed. 1. TEST Mode Cool 2; 2-Step Cool applications only 2. TEST Mode Cool 3; 3-Step Cool applications only Adjust R136 potentiometer clockwise to increase or counterclockwise to decrease motor speed. Refer to the Fan Output% list below for supply fan output associated with each unit function: Fan Output% • Ventilation Only 50% • Economizer Cooling 65% • Cool 1 (Cl Energized) 65% • Cool 2 (Cl + C2) 100% (2-Steps of Cooling) • Cool 2 (Cl or C2) 65% (3-Steps of Cooling) • Cool 3 (Cl + C2 Energized) 100% • Dehumidification Fan Speeds and Enhanced 53% • Heat 100% Multi -Zone VAV Sequence of Operation Supply Air Pressure Control ReliaTelTM Option Module Control (RTOM) Supply fan is driven by a pulse -width modulation (PWM) signal from the RTOM. Note: PWM = 3 to 5 tons A pressure transducer measures duct static pressure, and the supply fan is modulated to maintain the supply air static pressure within an adjustable user -defined range. The range is determined by the supply air pressure setpoint and supply air pressure deadband, which are set through a unit mounted potentiometer or remote panel. The RTOM provides supply fan motor speed modulation. RT-SVX21 AB-E N 53 aTRANE` Sequence of Operation The supply fan will accelerate or decelerate as required to maintain the supply static pressure setpoint. Supply Air Static Pressure Limit The control of the supply fan and VAV boxes are coordinated, with respect to time, during unit start up and transition to/from Occupied/Unoccupied modes to prevent overpressurization of the supply air ductwork. However, if for any reason the supply air pressure exceeds the fixed supply air static pressure limit of 3.5" W.C., the supply fan is shut down and the VAV boxes are closed. The unit is then allowed to restart three times. If the overpressurization condition occurs on the fourth time, the unit is shut down and a manual reset diagnostic is set and displayed at any of the remote panels with LED status lights or communicated to the Integrated Comfort system. Supply Air Temperature Controls Cooling/Economizer During occupied cooling mode of operation, the economizer (if available) and primary cooling are used to control the supply air temperature. The supply air temperature setpoint is user -defined at the unit mounted VAV Setpoint Potentiometer or at the remote panel. If the enthalpy of the outside air is appropriate to use "free cooling", the economizer will be used first to attempt to satisfy the supply setpoint. On units with economizer, a call for cooling will modulate the fresh air dampers open. The rate of economizer modulation is based on deviation of the discharge temperature from setpoint, i.e., the further away from setpoint, the faster the fresh air damper will open. Note that the economizer is only allowed to function freely if ambient conditions are below the enthalpy control setting or belowthe return air enthalpy if unit has comparative enthalpy installed. If outside air is not suitable for "economizing", the fresh air dampers drive to the minimum open position. A field adjustable potentiometer on the Economizer Actuator, or a remote potentiometer can provide the input to establish the minimum damper position. At outdoor air conditions above the enthalpy control setting, primary cooling only is used and the fresh air dampers remain at minimum position. If the unit does not include an economizer, primary cooling only is used to satisfy cooling requirements. Supply Air Setpoint Reset Supply air reset can be used to adjust the supply air temperature setpoint on the basis of a zone temperature, return air temperature, or on outdoor air temperature. Supply air reset adjustment is available on the unit mounted VAV setpoint potentiometer for supply air cooling control. Reset Based on Outdoor Air Temperature Outdoor air cooling reset is sometimes used in applications where the outdoor temperature has a large effect on building load. When the outside airtemperature is low and the building cooling load is low, the supply air setpoint can be raised, thereby preventing subcooling of critical zones. This reset can lower usage of primary cooling and result in a reduction in primary cooling energy usage There are two user -defined parameters that are adjustable through the VAV Setpoint Potentiometer: reset temperature setpoint and reset amount. The amount of reset applied is dependent upon how far the outdoor air temperature is below the supply air reset setpoint. The amount iszero wherethey are equal and increases linearly toward the value set at the reset amount input. The maximum value is 20°F. If the outdoor air temperature is more than 20°F below the reset temperature setpoint the amount of reset is equal to the reset amount setpoint. Reset Based on Zone or Return Temperature Zone or return reset is applied to the zone(s) in a building that tends to overcool or overheat. The supply air temperature setpoint is adjusted based on the temperature of the critical zone(s) or the return air temperature. This can have the effect of improving comfort and/or lowering energy usage. The user -defined parameters are the same as for outdoor air reset. Logic for zone or return reset control is the same except that the origins of the temperature inputs are the zone sensor or return sensor respectively. The amount of reset applied is dependent upon how far the zone or return air temperature is below the supply air reset setpoint. The amount iszero wherethey are equal and increases linearly toward the value set at the reset amount potentiometer on the VAV setpoint potentiometer. The maximum value is 3°F. If the return or zone temperature is more than 30F below the reset temperature setpoint the amount of reset is equal to the reset amount setpoint. Zone Temperature Control Unoccupied Zone Cooling During unoccupied mode, the unit is operated as a CV unit. VAV boxes are driven full open and the supply fan is commanded to full speed. The unit controls zone temperature to the Unoccupied zone cooling setpoints. Daytime Warm-up During occupied mode, if the zone temperature falls to a temperature three degrees below the Morning Warm-up setpoint, Daytime Warm-up is initiated. The system changesto CV heating (full unit airflow), the VAV boxes are fully opened and the CV heating algorithm is in control until the Morning Warm-up setpoint is reached. The unit is then returned to VAV cooling mode. The Morning Warm- up setpoint is set at the unit mounted VAV Setpoint potentiometer or at a remote panel. Morning Warm-up (MWU) Morning warm-up control (MWU) is activated whenever the unit switches from unoccupied to occupied and the zone temperature is at least 1.5°F below the MWU setpoint. When MWU is activated the VAV box output will 54 RT-SVX21 AB-E N be energized for at least 6 minutes to drive all boxes open, the supply fan is commanded to full speed, and full heat (gas or electric) is energized. When MWU is activated the economizer damper is driven fully closed. When the zone temperature meets or exceeds the MWU setpoint minus 1.5°F, the heat will be turned or staged down. When the zone temperature meets or exceeds the MWU setpoint then MWU will be terminated and the unit will switch over to VAV cooling. Variable Air Volume Applications (Single Zone VAV) Supply Fan Output Control Units configured for Single Zone VAV will be controlled via the 0-10 Vdc Indoor Fan Speed output located on the RTOM. R136 (DA COOL -FAN SPD) potentiometer on the RTOM sets the maximum motor speed. Note that the potentiometer voltage readings can be verified via 2- position harness connector located adjacentto the RTOM. The unit schematic will illustrate the exact location. Use a DC voltmeter to read the voltage between the two terminals. Reference the RPM table in the Performance Data section for fan speed. • Use Service TEST Mode to adjust maximum motor speed using modes listed below. 1. TEST Mode Cool 2; 2-Step Cool applications only 2. TEST Mode Cool 3; 3-Step Cool applications only • Adjust DA COOL_FAN SPD potentiometer clockwise to increase or counterclockwise to decrease motor speed. • The control will scale the 0-10 Vdc output from the RTOM linearly to control between the 50%-100% controllable range based on the space cooling demand. Minimum Supply Fan Output • Refertothetablebelowfordetailsonminimum supply fan output signals associated with each unit function. • Minimum Fan Output% • Ventilation Only 50% • Economizer Cooling 65% • Cool 1 (Cl Energized) 65% • Cool 2 (Cl + C2) 82% (2-Steps of Cooling) • Cool 2 (Cl or C2) 65% (3-Steps of Cooling) • Cool 3 (Cl + C2 Energized) 82% • Heat 100% Discharge Air Cool Setpoint Adjustment • Single Zone VAV units will require traditional zone heating (if heatinstalled) and cooling setpoints that are used on single speed units in addition to a new setpoint: Discharge Air Cool Setpoint limit. Discharge aTRANE` Sequence of Operation Air Cool Setpoints will be customer selectable via a potentiometer (DACR) adjacent to the RTOM with a range of 40- 70°F. • The table below lists the discharge air cool setpoints on the DACR. Note: The recommended setting is 50°F. Table 16. Discharge air cool setpoints (DACR) Setpoint (OF) Voltage (Vdc) 40 - <0.1 55 - 1.65 41-0.2 56-1.7 42 - 0.3 57 - 1.75 43 - 0.45 58 - 1.83 44-0.55 59-1.9 45 - 0.7 60 - 1.95 46-0.8 61-2 47 - 0.95 62 - 2.05 48 - 1.05 63 - 2.1 49-1.15 64-2.13 50 - 1.25 65 - 2.17 51-1.3 66-2.21 52 - 1.35 67 - 2.27 53-1.45 68-2.3 54 - 1.55 69 - 2.35 70 - >2.4 ReliaTelT"' Control Cooling with an Economizer The economizer is utilized to control the zone temperature providing the outside air conditions are suitable. Outside air is drawn into the unit through modulating dampers. When cooling is required and economizing is possible, the RTRM sends the cooling request to the unit economizer actuator (ECA) to open the economizer damper. The RTRM tries to cool the zone utilizing the economizer to slightly below the zone temperature setpoint. If the mixed air sensor (MAS) senses that the mixed air temperature is below 53°F, the damper modulates toward the closed position. If the zone temperature continues to rise above the zone temperature setpoint controlband and the economizer damper is full open, the RTRM energizes the compressor contactor (CC1). If the zone temperature continues to rise above the zone temperature setpoint controlband and the economizer damper is fully open, the RTRM energizes the compressor contactor (CC2). Multi -Speed Fan When economizing alone or with 1st stage cooling the indoor motor will operate at low speed. If economizing and 2nd stage cooling requested, the indoor motor will transition from low to high speed. RT-SVX21 AB-E N 55 aTRANE` Sequence of Operation Single Zone VAV The indoor motor will vary the indoor motor speed to optimize minimum fan speed forthe cooling demand in all modes (Economizer Only, Economizer+1 st Stage Cooling, or Economizer+ 1st/2nd Stage Cooling). The ECA continues to modulate the economizer damper open/closed to keep the mixed air temperature that is calculated by the RTRM. If economizing is not possible, the ECA drives the damper to the minimum position setpoint when the indoor fan relay (F) is energized and allows mechanical cooling operation. When the unit is equipped with the optional fan failure switch, wired between terminals J7-5 and J7-6 on the RTOM, the RTRM will stop all cooling functions and produce an analog output if the fan failure switch (FFS) does not open within 40 seconds after a request for fan operation. When the system is connected to a remote panel, the "SERVICE" LED will flash when this failure occurs. ReliaTelT"' Control Dehumidification Single Compressor Units On a call for dehumidification, the reheat valve is energized and the compressor is turned on. When the humidity control setpoint is satisfied, the valve is de - energized and the compressor isturned off. If there is a call for cooling or heating from the space temperature controller, i.e. zone sensor or thermostat, while in reheat, the reheat valve is de -energized and the compressor continues to run, or the heat is turned on. The 3 minute compressor on and off times are still active during compressor operation. Dual Compressor Units The dehumidification cycle is only permitted above 40OF and below 100°F and is not permitted during a heating cycle or during a demand for 2nd stage cooling. Otherwise, when an installed zone humidity sensor indicates a relative humidity equal to or greater than the RH set point as adjusted on the ReliaTeITI options module (RTOM), a dehumidification cycle is initiated. The sequence of operation forthe dehumidification cycle is identical to that of the second stage ReliaTeIT"' cooling cycle, except that the hot gas reheat valve (RHV) is energized, allowing air from the evaporator to be reheated. Also, any installed fresh air damper is driven to minimum position.The dehumidification cycle is terminated by initiation of a heating cycle or a 2nd stage cooling cycle or when zone humidity is reduced to 5% below the R.H. set point. In the absence of a zone humidity sensor input, an on/off input from a zone humidistat is used to initiate/terminate the dehumidification cycle. Dehumidification takes priority over a call for one -stage cooling. Heating or two -stage cooling takes priority over dehumidification, and a relative humidity sensor takes priority over a humidistat. Dehumidification Coil Purge Cycle On multiple circuit units with dehumidification/reheat configured, a purge cycle will be active for compressor reliability. The purpose of this function is to properly distribute refrigerantand lubricant throughout the system bytemporarily switching to the unused section of the coil for 3 minutes (purge cycle). The function operates as follows: 1. A purge cycle will be initiated after 90 minutes of accumulated compressor run time in only one mode: cooling or dehumidification, without transitioning to the other mode. 2. A purge cycle will consist of transitioning to the mode that hasn't run in 90 minutes of total compressor operation. The cycle will last for a period of 3 minutes. 3. The 90-minute cycle count will be reset anytime there is a normal transition between cooling and dehumidification. Transitioning from one of these modes to any other mode (off or heat) will not reset the counter. 4. If the purge cycle is a cooling cycle, only the first circuit will be activated. If it is a dehumidification cycle then the normal 2-compressor dehumidification mode cycle will be used. 5. The purge cycle will ignore the low ambient dehumidification lockout feature. 6. A purge cycle takes priority over normal cooling or dehumidification requests, but will discontinue for all high priority lockouts and alarms. ReliaTelT"' Control Cooling with an Economizer The economizer is utilized to control the zone temperature providing the outside air conditions are suitable. Outside air is drawn into the unit through modulating dampers. When cooling is required and economizing is possible, the RTRM sends the cooling request to the unit economizer actuator(ECA)to open the economizer damper. The RTRM tries to cool the zone utilizing the economizer to slightly below the zone temperature setpoint. If the mixed air sensor (MAS) senses that the mixed air temperature is below 53°F, the damper modulates toward the closed position. If the zone temperature continues to rise above the zone temperature setpoint control band and the economizer damper is full open for 5 minutes, the RTRM energizes the compressor contactor (CC1). If the zone temperature continues to rise above the zone temperature setpoint control band and the economizer damper is fully open, the RTRM energizes the compressor contactor (CC2). 56 RT-SVX21AB-EN The ECA continues to modulate the economizer damper open/closed to keep the mixed air temperature that is calculated by the RTRM. If economizing is not possible, the ECA drives the damper to the minimum position setpoint when the indoor fan relay (F) is energized and allows mechanical cooling operation. When the unit is equipped with the optional fan failure switch, wired between terminals J7-5 and J7-6 on the RTOM, the RTRM will stop all cooling functions and produce an analog output if the fan failure switch (FFS) does not open within 40 seconds after a request for fan operation. When the system is connected to a remote panel, the "SERVICE" LED will flash when this failure occurs. Note: For units equipped with the dehumidification option, if the unit is economizing, the damper resets to minimum position while in dehumidification mode. Economizer Set -Up Adjusting the minimum position potentiometer located on the unit economizer actuator (ECA) sets the required amount of ventilation air. Two of the three methods for determining the suitability of the outside air can be selected utilizing the enthalpy potentiometer on the ECA, as described below: 1. Ambient temperature - controlling the economizing cycle by sensing the outside air dry bulb temperature. The following table lists the selectable dry bulb values by potentiometer setting. 2. Reference enthalpy - controlling the economizer cycle by sensing the outdoor air humidity. The following table lists the selectable enthalpy values by potentiometer setting. If the outside air enthalpy value is less than the selected value, the economizer is allowed to operate. 3. Comparativeenthalpy- utilizingahumiditysensorand a temperature sensor in both the return air stream and the outdoor air stream, the unit control processor (RTRM) will be able to establish which conditions are best suited for maintaining the zone temperature, i.e. indoor conditions or outdoor conditions. The potentiometer located on the ECA is non-functional when both the temperature and humidity sensors are installed. aTRANE` Sequence of Operation Table 17. Potentiometer settings Potentiometer Setting , Dry Bulb Reference Enthalpy A 73°F (22.80C) 27 Btu/Ib (63 kJ/kg) B 70oF (21.10C) 25 Btu/Ib (58 kJ/kg) C 670F(a) (19.40C) 23 Btu/Ib (53 kJ/kg) D 630F (17.20C) 22 Btu/Ib (51 kJ/kg) E 55OF (12.8°C) 19 Btu/Ib (44 k]/kg) (a) Factory settings ReliaTelT"' Control Heating Operation (for Cooling Only Units) When the system switch is set to the "Heat" position and the zone temperature falls below the heating setpoint control band, the RTRM energizes (K1) relaycoil. When the (K1) relay contacts close, located on the RTRM, the first stage electric heat contactor (AH or AH and CH) is energized. If the first stage of electric heat can not satisfy the heating requirement, the RTRM energizes (K2) relay coil. When the (K2) relay contacts close, located on the RTRM, the second stage electric heat contactor (BH) is energized, if applicable. The RTRM cycles both the first and second stages of heat "On" and "Off" as required to maintain the zone temperature setpoint. ReliaTelT"' Control Heating Operation (for Gas Units) When the system switch is set to the "Heat" position and the zone temperature falls below the heating setpoint control band, a heat cycle is initiated when the RTRM communicates ignition information to the Ignition module (IGN). Ignition Module Two -stage (IGN) runs self -check (including verification that the gas valve is de -energized). (IGN) checks the high - limit switches (TC01 and TCO2) for normally closed contacts, the pressure switch (PS) for normally open contacts, and the flame rollout (FR) switch for continuity. (IGN) energizes inducer blower on high speed to check pressure switch closure. If the pressure switch is closed, the inducer blower starts a 20-second pre -purge (15 seconds on high speed followed by 5 seconds on low speed). If the pressure switch (PS) is still open, the inducer blower will continue to be energized on high speed until pressure switch closure. After pre -purge completes, the (IGN) energizes the first stage of the gas valve, initiates spark for 2 seconds minimum, 7 seconds maximum (ignition trial) and detects flame and de -energizes spark. From this point, a fixed 45 second indoor blower delay on timing starts. After the indoor blower delay on is completed, the (IGN) energizes the indoor blower. The (IGN) enters a normal operating loop where all inputs are continuously monitored. If the first stage of gas heat can RT-SVX21 AB-E N 57 aTRANE` Sequence of Operation not satisfy the heating requirement, the thermostat closes W2. The (IGN) energizes the second stage of the gas valve and the second stage of inducer blower. When the zone thermostat is satisfied, the (IGN) de -energizes the gas valve. The (IGN) senses loss of flame. The (IGN) initiates a 5 second inducer blower post purge. The (RTRM) initiates a second indoor blower delay off. If the burnerfailsto ignite,the ignition modulewill attempt two retries before locking out. The green LED will indicate a lock out by two fast flashes. An ignition lockout can be reset by; 1. Opening for 3 seconds and closing the main power disconnect switch. 2. Switching the "Mode" switch on the zone sensor to "OFF" and then to the desired position. 3. Allowing the ignition control module to reset automatically after one hour. Refer to the "Ignition Control Module Diagnostics" section for the LED diagnostic definitions. When the fan selection switch is setto the "Auto" position, the RTRM energizes the indoor fan relay (F) coil approximately 30 second after initiating the heating cycle to start the indoor fan motor (IDM). Table 18. Ignition module diagnostics Module is powered up, but no active call for Steady light heat. Blinking at continuous Active call for heat. steady rate One blink Loss of communication. System lockout (failure to ignite, no spark, low/ Two blinks no gas pressure, etc.) Pressure switch (no vent air flow, bad CBM, Three blinks closed at initial call for heat). Auto reset. High limit (excessive heat in combustion Four blinks chamber, low airflow). Auto reset. Flame sensed and gas valve not energized or Five blinks flame sensed and no call for heat. Flame rollout (CBM failure, incorrect gas pressure, incorrect primary air). Requires Six blinks manual reset of the switch. ReliaTel"" module will communicate a heat fail Seven blinks diagnostic back to the RTRM. Drain Pan Condensate Overflow Switch (Optional) This input incorporates the condensate overflow switch (COF) mounted on the drain pan and the ReliaTeIT"" options module (RTOM). When the condensate level reaches the trip point for 6 continuous seconds, the RTOM will shut down all unit function until the overflow condition has cleared. The unit will return to normal operation after 6 continuous seconds with the COF in a non -tripped condition. If the condensate level causes the unit to shutdown more than 2 times in a 3 day period, the unit will be locked -out of operation. A manual reset of the diagnostic system through the zone sensor or Building Automation System (BAS) will be required. Cycling unit power will also clear the fault. Electromechanical Controls These units are offered with two control options, electromechanical and ReliaTeITI controls. The ReliaTeIT°" controls is a microelectronic control feature, which provides operating functions that are significantly different than conventional electromechanical units. Electromechanical Control Cooling without an Economizer When the thermostat switch is set to the "Cool" position and the zone temperature rises above the cooling setpoint, the thermostat Y contacts close. The compressor contactor (CC1) coil is energized provided the low pressure control (LPC1), high pressure control (HPC1) and discharge line thermostat (TDL 1) are closed. When the (CC1) contacts close, compressor (CPR1) and the outdoor fan motor (ODM) start. If the first stage of cooling can not satisfy the cooling requirement, the thermostat closes Y2. The compressor contactor (CC2) coil is energized provided the low pressure control (LPC2), high pressure control (HPC2) and discharge line thermostat (TDL 2) are closed. When the (CC2) contacts close, compressor (CPR2) starts Electromechanical Control Evaporator Fan Operation (for Gas Units) When the thermostat fan selection switch is set to the "Auto" position, the Ignition Module (IGN) energizes the indoor fan relay (F) approximately 1 second after energizing the compressor contactor coil (CC1) in the cooling mode. In the heating mode, the Ignition Module (IGN) energizesthe indoorfan relay (F) coil approximately 45 second after gas ignition. Closing indoor fan relay (F) coil starts the indoor fan motor (IDM). The (IGN) de - energizes the fan relay (F) approximately 80 seconds after the cooling requirement has been satisfied to enhance unit efficiency. When the heating cycle is terminated, the indoor fan relay (F) coil is de -energized approximately 90 seconds after the heating requirement. When the thermostat fan selection switch is set to the "On" position, the (IGN) keeps the indoor fan relay coil (F) energized for continuous fan motor operation. Electromechanical Evaporator Fan Operation (for Cooling Only Units) When the thermostat fan selection switch is set to the "Auto" position, the thermostat energizes the indoor fan relay coil (F) to start the indoor fan motor (IDM). The fan relay (F) de -energizes after the cooling requirement has been satisfied. When the heating cycle is terminated, the indoor fan relay (F) coil is de -energized with heater contactors. 58 RT-SVX21 AB-E N When the thermostat fan selection switch is set to the "On" position, the thermostat keeps the indoor fan relay coil (F) energized for continuous fan motor operation. Economizer Set -Up Adjusting the minimum position potentiometer located on the unit economizer actuator (ECA) sets the required amount of ventilation air. Ambient tem peratu re is controlling the economizing cycle by sensing the outside air dry bulb temperature. The following table lists the selectable dry bulb values by potentiometer setting. Table 19. Potentiometer settings Potentiometer Setting Dry Bulb Reference Enthalpy A 73°F (22.80C) 27 Btu/lb (63 kJ/kg) B 70°F (21.10C) 25 Btu/lb (58 kJ/kg) C 670F(8) (19.40C) 23 Btu/lb (53 kJ/kg) D E 63°F (17.20C) 22 Btu/lb (51 kJ/kg) 550F (12.80C) 19 Btu/lb (44 kJ/kg) (a) Factory settings Electromechanical Control Cooling with an Economizer The economizer is utilized to control the zone temperature providing the outside air conditions are suitable. Outside air is drawn into the unit through modulating dampers. When cooling is required and economizing is possible, the unit economizer actuator (ECA) opens the economizer damper. The ECA continues to modulate the economizer damper open/closed to keep the mixed air temperature in the 50°F to 55OF range. The thermostat will close the Y2 contacts to turn on contactor (CC1) if mechanical cooling is required. If economizing is not possible, the ECA drives the damper to the minimum position setpoint when the indoor fan relay (F) is energized and allows mechanical cooling operation. Electromechanical Control Heating Operation (for Cooling Only Units) When the system switch is set to the "Heat" position and the zone temperature falls below the heating setpoint, the thermostat closes W1 contacts the first stage electric heat contactor (AH or AH and CH) is energized. If the first stage of electric heat can not satisfythe heating requirement, the thermostat closes W2. When the W2 contacts close, the second stage electric heat contactor (BH) is energized, if applicable. The thermostat cycles both the first and second stages of heat "On" and "Off" as required to maintain the zone temperature setpoint. aTRANE` Sequence of Operation Electromechanical Control Heating Operation (for Gas Units) When the system switch is set to the "Heat" position and the zone temperature falls belowthe heating setpoint, the Ignition module (IGN) initiates a heat cycle. Ignition Module Low, Medium and High Heat Two -stage (IGN) runs self -check (including verification that the gas valve is de -energized). (IGN) checks the high - limit switches (TC01 and TCO2) for normally closed contacts, the pressure switch (PS) for normally open contacts, and the flame rollout (FR) switch for continuity. (IGN) energizes inducer blower on high speed to check pressure switch closure. If the pressure switch is closed, the inducer blower starts a 20second pre -purge (15 secondson high speedfollowed by 5 seconds on low speed). If the pressure switch (PS) is still open, the inducer blower will continue to be energized on high speed until pressure switch closure. After pre -purge completes, the (IGN) energizes the first stage of the gas valve, initiates spark for 2 seconds minimum, 7 seconds maximum (ignition trial) and detects flame and de -energizes spark. From this point, a fixed 45 second indoor blower delay on timing starts. After the indoor blower delay on is completed, the (IGN) energizes the indoor blower. The (IGN) enters a normal operating loop where all inputs are continuously monitored. If the first stage of gas heat can not satisfy the heating requirement, the thermostat closes W2. The (IGN) energizes the second stage of the gas valve and the second stage of inducer blower. When the zone thermostat is satisfied, the (IGN) de - energizes the gas valve. The (IGN) senses loss of flame. The (IGN) initiates a 5 second inducer blower post purge and 90 second indoor blower delay off at current speed. The (IGN) de -energizes the inducer blower atthe end of the post purge. The (IGN) de -energizes the indoor blower at the end of the selected indoor blower delay off. Table 20. Ignition module diagnostics Module is powered up, but no active call for Steady light heat. Blinking at continuous steady Active call for heat. rate One blink Loss of communication. System lockout (failure to ignite, no spark, Two blinks low/no gas pressure, etc.) Pressure switch (no vent air flow, bad CBM, Three blinks closed at initial call for heat). Auto reset. High limit (excessive heat in combustion Four blinks chamber, low airflow). Auto reset. Flame sensed and gas valve not energized Five blinks or flame sensed and no call for heat. RT-SVX21 AB-E N 59 aTRANE` Sequence of Operation Table 20. Ignition module diagnostics (continued) Flame rollout (CBM failure, incorrect gas pressure, incorrect primary air). Requires Six blinks manual reset of the switch. W1 and W2 swapped (electromechanical 3- Seven blinks 10 tons units). Drain Pan Condensate Overflow Switch (Optional) The condensate overflow switch (COF) is utilized to prevent water overflow from the drain pan. The float switch is installed on the corner lip of the drain pan. When the condensate level reaches the trip point, the COF relay energizes and opens the 24 Vac control circuit which disablesthe unit. Oncethe 24Vaccontrol circuit is opened, a delay timer will prevent unit start-up for three minutes. Verifying Proper Air Flow Live Electrical Components! Failure to follow all electrical safety precautions when exposed to live electrical components could result in death or serious injury. When necessary to work with live electrical components, have a qualified licensed electrician or other individual who has been properly trained in handling live electrical components perform these tasks. Units with 5-Tap Direct Drive Indoor Fan Much of the systems performance and reliability is closely associated with, and dependent upon having the proper airflow supplied both to the space that is being conditioned and across the evaporator coil. The indoor fan motor is factory wired to operate on speed tap 1 in the cooling and heating mode for electric/electric units. For Gas/Electric units, the motor is factory wired to operate on speed tap 1 during cooling. For 3 and 4ton Gas/ Electric units operating in heat mode, the minimum setting is Tap 4. For these units, a separate tap terminal is provided to change speeds automatically between heating and cooling. The motor can be rewired for different speed settings should the application require it. Refer to the wiring diagram that shipped in the unit and the unit fan performance tables in the Service Facts. The indoorfan motors are specifically designed to operate within the BHP parameters listed in the fan performance tables of the unit Service Facts. When verifying direct drive fan performance, the tables must be used somewhat differently than those of belt driven fans. Fan performance diagnostics can be easily recognized when these tables are used correctly. Before starting the SERVICE TEST, set the minimum position setpointforthe economizerto 0 percent using the setpoint potentiometer located on the Economizer Control (ECA), if applicable. ReliaTelTM Control: Using the Service Test Guide in Table 15, p. 50, momentarily jump across the Test 1 and Test 2 terminals on LTB1 one time to start the Minimum Ventilation Test. Electromechanical Control: Using the Service Test Guide perform the proper test mode connections. With the fan operating properly, determine the total system external static pressure (inches w.c.) by the following method (ReliaTeIT""/Electromechanical): 1. Measurethesupplyandreturn ductstaticpressureand sum the resulting absolute values, 2. Use the accessory pressure drop table in the Service Facts, to calculate the total static pressure drop for all of the accessories installed on the unit; i.e., curb, economizer, etc. Note: Accessory static pressure drop is based on desired CFM and may not be actual static pressure drop. 3. Add the total accessory static pressure drop (step 2) to the duct external static pressure (step 1). The sum of these two values represents the total system external static pressure. Using the Fan Performance Tables in the Service Facts, look up the selected speed tap setting and match the measured ESP to determine the approximate CFM. If the required CFM is too low, (external static pressure is high) do one or both of the following and repeat procedure: a. Relieve supply and/or return duct static. b. Change indoor fan speed tap to a higher value If the required CFM is too high, (external static pressure is low), do one or both of the following and repeat procedure: a. Increase supply and/or return duct static. b. Change indoor fan speed tap to a lower value. Note: Minimum setting for units with Gas or Electric Heat is 320 CFM per Ton. For 3 and 4 Ton Gas Heat units operating in heating mode the heat speed set cannot be lower than Speed Set 4. 4. To stop the SERVICE TEST, turn the main power disconnect switch to the "Off" position or proceed to the next component start-up procedure. Units with Belt Drive Indoor Fan Much of the systems performance and reliability is closely associated with, and dependent upon having the proper airflow supplied both to the space that is being conditioned and across the evaporator coil. 60 RT-SVX21 AB-E N The indoor fan speed is changed by opening or closing the adjustable motor sheave. Before starting the SERVICE TEST, set the minimum position setpointforthe economizerto 0 percent using the setpoint potentiometer located on the Economizer Control (ECA), if applicable. ReliaTelT"" Control: Using the Service Test Guide in Table 15, p. 50, momentarily jump across the Test 1 and Test 2 terminals on LTB1 one time to start the Minimum Ventilation Test. Electromechanical Control: Using the Service Test Guide perform the propertest mode connections.Once the supply fan has started, check for proper rotation. The direction of rotation is indicated by an arrow on the fan housing. With the fan operating properly, determine the total system airflow (CFM) by (ReliaTeIT"^/Electromechanical): 1. Measuring the actual RPM, 2. Measurethe amperage atthe supplyfan contactorand compare itwith the full load amp (FLA) rating stamped on the motor nameplate. a. Calculate the theoretical BHP using (Actual Motor Amps/ Motor Nameplate Amps) X Motor HP. b. Using the fan performance tables in the unit Service Facts, plot the actual RPM (step 1) and the BHP (step 2a) to obtain the operating CFM. 3. If the required CFM is too low, (external static pressure is high causing motor HP output to be below table value), a. Relieve supply and/or return duct static. b. Change indoor fan speed and repeat steps 1 and 2. • To Increase Fan RPM; Loosen the pulley adjustment set screw and turn sheave clockwise. • To Decrease Fan RPM; Loosen the pulley adjustment set screw and turn sheave counterclockwise. • If the required CFM is too high, (external static pressure is low causing motor HP output to be above tablevalue), change indoorfan speed and repeatsteps 1 and 2. • To stop the SERVICE TEST, turn the main power disconnect switch to the "Off" position or proceed to the next component start-up procedure. Units with Direct Drive Indoor Fan - Electromechanical Control Much of the systems performance and reliability is closely associated with, and dependent upon having the proper airflow supplied both to the space that is being conditioned and across the evaporator coil. The indoor fan speed is changed by adjusting the output voltage from the MMC/ECM board to the direct drive fan. Before starting the SERVICE TEST, set the minimum position setpoint for the aTRANE` Sequence of Operation economizer to 0 percent using the setpoint potentiometer located on the Economizer Control (ECA), if applicable. ReliaTelTM Units with Direct Drive Indoor Fan Note: 10 tons standard efficiency, 6 (074) to 10 tons high efficiency and optional on 7.5 (092) to 8.5 tons standard efficiency Much of the systems performance and reliability is closely associated with, and dependent upon having the proper airflow supplied both to the space that is being conditioned and across the evaporator coil. The indoor fan speed is changed by adjusting the voltage from the RTOM indoor fan speed output to the direct drive plenum fan. If installed, before starting the SERVICE TEST disable the economizer by disconnecting the 4 pin power connector located at the base of the Economizer Control (ECA). Using the service test guide in Table 15, p. 50, momentarily jump across the Test 1 and Test 2 terminals on LTB1. Repeat process until Service Test Mode is at Cool 2 (2-Steps of Cooling Applications Only) or Cool 3 (3-Steps of Cooling applications). The indoor motor shall be operating @ 100%, to verify turn DA COOL —FAN SPD potentiometer fu I I clockwise, voltage should read —7.5 Vdc across harness test terminals. The Unit schematic illustrates location for measuring the indoor motor speed voltage. Table 21. Direct drive plenum fan settings (rpm vs. voltage) Potentiometer Voltage Motor RPM 1 N/A 1.25 N/A 1.5 N/A 1.75 N/A 2 N/A 2.25 325 2.5 402 2.75 465 3 544 3.25 630 3.5 716 3.75 775 4 845 4.25 912 Potentiometer Voltage Motor RPM 4.5 976 4.75 1044 5 1115 5.25 1203 5.5 1253 5.75 1312 6 1368 RT-SVX21 AB-E N 61 aTRANE` Sequence of Operation Table 21. Direct drive plenum fan settings (rpm vs. voltage) (continued) 6.25 6.5 6.75 1425 1475 1533 7 1581 7.25 1615 7.5 1615 Once the supply fan has started, determine the total system airflow (CFM) 1. Measure the DC voltage across harness test terminals. Using the fan rpm table shown above, determine RPM correlated to measured voltage. 2. If the required CFM is too low, (external static pressure is high causing motor HP output to be below table value), a. Relieve supply and/or return duct static. b. Change indoor fan speed and repeat steps 1 and 2. • To Increase/Decrease Fan RPM turn DA COOL FAN SPD on the RTOM clockwise/counter-clockwise. 3. If the required CFM is too high, (external static pressure is low causing motor HP output to be above tablevalue), change indoorfan speed and repeatsteps 1 and 2. • Stop the SERVICE TEST, turn the main power disconnect switch to the "Off' position and reconnect Economizer 4-pin power connector if disconnected for this procedure. Proceed to the next component start-up procedure. Electromechanical Control: Using the Service Test Guide perform the proper test mode connections. Once the supply fan has started, determine the total system airflow (CFM) by (ReliaTelTM/Electromechanical): 1. Measurethe amperage at the supply fan contactorand compare it with the full load amp (FLA) rating for the evaporator motor stamped on the unit nameplate. a. Calculate the theoretical BHP using (Actual Motor Amps/Motor Nameplate Amps) X Motor HP. b. Using the fan performance tables in the unit Service Facts, plot the actual RPM (step 1) and the BHP (step 2a) to obtain the operating CFM. 2. If the required CFM is too low, (external static pressure is high causing motor HP output to be below table value), a. Relieve supply and/or return duct static. b. Change indoor fan speed and repeat steps 1 and 2. • For ECM board: To Increase/Decrease Fan RPM: a. Push and hold the SET button for 3 sec. Board will display Motor 1 parameter name: Hi 1. b. Slow push SET again to display the parameter's current value =7.50 volts. c. Push on+or—button to adjust parameter to desired value = XXX volts. d. Push and hold SET button for 3 sec to "save" the value. After save is complete, Hi 1 will show again. e. After the voltage Hi 1 is successfully changed, the display sequence will be: MTR 1 --- > XXX -----> MTR2 -----> 0.00----- >FST1---- >ON/ OFF ----- >FST2------ >ON/OFF------- >EhEn-- --->ON/OFF The motor will ramp up or down to adjust to the input signal. Using the fan rpm table above, determine RPM correlated to displayed voltage. • If the required CFM is too high, (external static pressure is low causing motor HP output to be above table value), change indoorfan speed and repeat steps 1 and 2. • To stop the SERVICE TEST, turn the main power disconnect switch to the "Off" position or proceed to the next component start-up procedure. Units with Constant CFM Direct Drive Indoor Fan Much of the systems performance and reliability is closely associated with, and dependent upon having the proper airflow supplied both to the space that is being conditioned and across the evaporator coil. The indoor fan provides a constant CFM base on voltage output for the potentiometer on the RTOM board. Before starting the SERVICE TEST, set the minimum position setpoint for the economizer to 0% using the setpoint potentiometer located on the Economizer Control (ECA), if applicable. ReliaTelTM Control. Using the Service Test Guide in Table 15, p. 50, momentarily jump across the Test 1 and Test 2 terminals on LTB1 one time to start the Minimum Ventilation Test. Once the supply fan has started, determine the total system airflow (CFM) by: 1. Measure the DC voltage across pins TP1 and ground (screwon cornerof RTOM board). Lookup desired CFM using the voltage CFM table shown on the access panel label or in the unit Service Facts; record corresponding voltage. Adjust potentiometer until output voltage across TP1 and ground achieves desired CFM setpoint. 2. To increase voltage/CFM, turn potentiometer clockwise. 3. To decrease voltage/CFM, turn potentiometer counter- clockwise. Note: With ID fan access panel removed, fan will operate at lower RPM due to the decrease in pressure. Once panel is installed, RPM will increase. 62 RT-SVX21 AB-E N 17 Plus units with the constant CFM direct drive indoor fan Proper airflow is critical to unit operation. All 17 Plus Precedent units (037, 047, and 067 units) use an indoorfan that provides a constant CFM. There are two different types of 17 Plus Precedent units: Single Zone VAV units and Multi Speed units. Both types of units use the same type of indoor motor and the same airflow adjustment procedure. To adjust airflow on a 17 Plus unit the Service Test mode must be used for accurate results. Additionally, airflow adjustments should be made in either "Cool Stage 2" or any stage of heat because the fan is driven to its maximum setting during these stages. Onlythe maximum fan setting requires adjustment, all other fan speeds follow the maximum adjustment and do not require any adjustment. Using the Service Test Guide in Table 15, p. 50, enter the unit into either "Cool Stage 2" or any stage of heat by using either the "Step Test Mode" or "Resistance Test Mode". Once the unit is in either "Cool Stage 2" or any stage of heat, system airflow (CFM) is determined by: 1. In the indoor fan compartment, locate the R136 potentiometer on the RTOM circuit board (also designated "DA COOL - FAN SPY). Also, locate the TP1 test pin loop next to the R136 potentiometer. 2. Measure the DC Voltage across the test pin TP1 and unit chassis ground. Compare DC voltage to the CFM chart shown in Table 22, p. 63. Table 22, p. 63 shows what DC voltage corresponds to CFM per ton of unit cooling. Note: If 1200 cfm is required from a 3 ton unit (037) the R136 potentiometer should be adjusted so that the DC voltage measured at TP1 to ground reads 1.65 volts DC. 3. To increase the TP1 voltage, turn the R136 potentiometer clockwise. 4. To decrease the TP1 voltage, turn the R136 potentiometer counter -clockwise. Note: With the indoor fan access panel removed, the fan will operate at a lower RPM because static pressure is reduced with the door open. Once the panel is returned the RPM of the indoor fan will increase. Table 22. Cfm vs. vdc PWM% value Potentiometer Voltage (Vdc) CFM/Ton 70 <0.1 320 75 0.7 347 80 1.25 373 85 1.65 400 90 1.95 427 95 2.17 453 100 >2.4 480 aTRANE` Sequence of Operation Variable Air Volume Applications (Traditional VAV) Supply Air Temperature Control - Occupied Cooling and Heating The RTRM is designed to maintain a selectable supply air temperature of 40°F to 90°F with a +/- 3.5°F deadband. In cooling, if supply airtemperature is morethan 3.5 degrees warmer than the selected temperature, a stage of cooling will be turned "On" (if available). Then if the supply air temperature is more than 3.5° cooler than the selected temperature, a stage of cooling will be turned "Off". At very Iowairflowsthe unit maycycle stages "On" and "Off" to maintain an average discharge airtemperature outside the 7° deadband. During low load or low airflow conditions the actual temperature swing ofthe discharge airwill likely be greater. The RTRM utilizes a proportional and integral control scheme with the integration occurring when the supply airtemperature is outside the deadband. As long as the supply air temperature is within the setpoint deadband, the system is considered to be satisfied and no staging up or down will occur. Note: The RTRM is designed to maintain a selectable supply air temperature of 40OF to 90OF with a +/- 3.5°F deadband. However, to reduce the risk of evaporatorcoil freeze-up in Precedentand Voyager Light Commercial applications, supply air temperature should not be set below 50' F. Supply Air Temperature Control with an Economizer The economizer is utilized to control the supply air cooling at+1.5°F around the supply airtemperature setpoint range of 40°F and 90°F providing the outside air conditions are suitable. To reduce the risk of evaporator coil freeze-up supply air temperature should not be set below 50' F. While economizing, the mechanical cooling is disabled until the economizer dampers have been fully open for three minutes. If the economizer is disabled due to unsuitable conditions, the mechanical cooling will cycle as though the unit had no economizer. Note: The RTRM is designed to maintain a selectable supply air temperature of 40°F to 90°F with a +/- 3.5°F deadband. However, to reduce the risk of evaporatorcoil freeze-up in Precedent and Voyager Light Commercial applications, supply air temperature should not be set below 50°F. VHR Relay Output During unoccupied mode, daytime warm-up (DWU), morning warm-up (MWU) and heating mode the Supply Fan will operate at 100% of user set maximum airflow. All VAV boxes must be opened through an ICS program or by the VHR wired to the VAV boxes. The RTRM will delay 100% fan operation approximately 6.5 minutes when switching from occupied cooling mode to a heating mode. RT-SVX21 AB-E N 63 aTRANE` Sequence of Operation Zone Temperature Control without a Night Setback Panel or ICS - Unoccupied Cooling When a field supplied occupied/unoccupied switching device is connected between RTRM J6-11 and RTRM J6- 12, both the economizer and the mechanical cooling will be disabled. Zone Temperature Control without a Night Setback Panel or ICS - Unoccupied Heating When a field supplied occupied/unoccupied switching device is connected between RTRM J6-11 and J6-12 and DWU is enabled, the zone temperature will be controlled at 10°F below the Morning Warm-up setpoint, but not less than 50oF, by cycling one or two stages of either gas or electric heat, whichever is applicable. Morning Warm-up (MWU) Control Morning Warm-up is activated if the zone temperature is at least 1.5°F below the MWU setpoint whenever the system switches from Unoccupied to Occupied status. The MWU setpoint may be set from the unit mounted potentiometer or a remotely mounted potentiometer. The setpoint ranges are from 50°F to 90°F. When the zone temperature meets or exceedsthe MWU setpoint,the unit will switch to the "Cooling" mode. The economizerwill be held closed during the morning warm-up cycle. Daytime Warm-up (DWU) Control Daytime Warm-up is applicable during occupied status and when the zone temperature is below the initiation temperature. It can be activated or deactivated through ICS or a night setback zone sensor. If ICS or a night setback zone sensor is not utilized, DWU can be activated by setting the DWU enable DIP switch (RTAM) to ON and supplying a valid morning warm-up setpoint. The unit is shipped with a Morning Warm-up setpoint configured andthe Daytime Warm-up function is activated (switch on). Opening the DWU enable switch will disable this function. If the system control is local, the DWU initiation setpoint is 3°F below the Morning Warm-up setpoint. The termination setpoint is equal to the Morning Warm-up setpoint. If the system control is remote (Tracer®), the DWU setpoint is equal to the Tracer® Occupied heating setpoint. The initiation and termination setpoints are selectable setpoints designated by Tracer®. When the zone temperature meets or exceeds the termination setpoint while the unit is in an Occupied, "Auto" Mode or switched to the "Cooling" Mode, the unit will revert to the cooling operation. If an Occupied "Heating" Mode is selected, the unit will only function within the DWU perimeters until the system is switched from the "Heat" Mode or enters an Unoccupied status. Note: When a LCI is installed on a VAV unit, the MWU setpoint located on the RTAM board is ignored. The MWU and DWU setpoints come from the higher priority LCI-R DAC. Supply Duct Static Pressure Control The supply duct static pressure is measured by a transducer with a 0.25 to 2.125 Vdc proportional output which corresponds to an adjustable supply duct static pressure of 0.3" w.c. to 2.5" w.c. respectively with a deadband adjustment range from 0.2" w.c. to 1.0" w.c. The setpoint is adjustable on the RTAM Static Pressure Setpoint potentiometer or through ICS. Traditional VAV Standalone Operation If a traditional VAV unit is required to operate without ICS, BAS or other "front end" controller, a jumper must be placed between J6-2 and J6-4 of the RTRM to allow local standalone control. Example: Supply Duct Static setpoint = 2.0" w.c. (RTAM) Deadband = 0.2" w.c. (RTAM) Duct Static Control Range = 1.9" w.c. to 2.1" w.c. Figure 72. Transducer voltage output vs. pressure input imt nr� �� iifin rani i im � nm � _ � u�a�u�ws�•wuuuuuinuuuiu•ru•r� 3.55 3.0 2.5 2.0 1.5 1.0 0.5 0.0 •0.5 0.0 0.5 1.0 1.5 2.0 2.5 3,0 3.5 4.0 4.5 5.0 5,5 Pressure (inches w.c.) Supply Air Temperature Reset The supply air temperature can be reset by using one of four DIP switch configurations on the RTAM or through ICS when a valid supply air reset setpoint with a supply air reset amount is given. A selectable reset amount of 0° F to 20°F via RTAM potentiometer or ICS is permissible for each type of reset. The amount of change applied to the supply air temperature setpoint depends on how far the return air, zone, or outdoor air temperature falls below the reset temperature setpoint. If the return air, zone, or outdoor air temperature is equal to or greater than the reset temperature setpoint, the amount of change is zero. If the return air, or zone temperature falls 3°F below the reset temperature setpoint, the amount of reset applied to 64 RT-SVX21AB-EN the supply air temperature will equal the maximum amount of reset selected. If the outdoor air temperature falls 20°F below the reset temperature setpoint, the amount of reset applied to the supply airtemperature will equal the maximum amount of reset selected. The four DIP switch configurations are as follows: 1. None - When RTAM DIP Switch #3 and #4 are in the "Off" position, no reset will be allowed. 2. Reset based on Return Air Temperature- When RTAM DIP Switch #3 is "Off" and Switch #4 is "On", a selectable supply air reset setpoint of 50°F to 90°F via a unit mounted potentiometer or Tracer® is permissible. 3. Reset based on Zone Temperature - When RTAM DIP Switch #3 is "On" and Switch #4 is "Off", a selectable supply air reset setpoint of 50°F to 90°F via RTAM potentiometer or Tracer® is permissible. 4. Reset based on Outdoor Air Temperature - When DIP Switch #3 and #4 are "On", a selectable supply air reset setpoint of 0°F to 100°F via RTAM potentiometer or Tracer® is permissible. Return Air Smoke Detector The return air smoke detector is designed to shut off the unit if smoke is sensed in the return air stream. Sampling the airflow entering the unit at the return air opening performs this function. In orderforthe smoke detectorto properly sense smoke in the return airstream,the air velocity entering the unit must be between 500 and 4000 feet per minute. Equipment covered in this manual will develop an airflow velocity that falls within these limits over the entire airflow range specified in the evaporator fan performance tables. There are certain models however, if operated at low airflow, will not develop an airflow velocity that falls within the required 500 to 4000 feet per minute range. For these models, the design airflow shall be greater than or equal to the minimum CFM specified in the table provided below. Failure to followthese instructions will prevent the smoke detector from performing its design function. Economizer Start -Up Live Electrical Components! Failure to follow all electrical safety precautions when exposed to live electrical components could result in death or serious injury. When necessary to work with live electrical components, have a qualified licensed electrician or other individual who has been properly trained in handling live electrical components perform these tasks. aTRANE` Sequence of Operation Minimum Position Setting for 17 Plus, 6 to 10 Ton with Multi -Speed, or Single Zone VAV 1. Apply power to the unit 2. Using the Service Test Guide on unit access panel, momentarily jump across the Test 1 and Test 2 terminals on LTB1 one time to start indoor fan. Turn the MIN POS - DCV potentiometer on the RTEM clockwise to open or counter -clockwise to close. The damper will open to this setting for low speed fan operation. When adjusting minimum position, the damper may move to the new setting in several small steps. Wait at least 15 seconds for the damper to settle atthe new position. Range of damper forthis setting is 0-100%. 4. Momentarily jump across the Test 1 and Test 2 terminals on LTB1, to cycle through test modes to Cool 1. 5. Turn the DCV SETPOINT - LL potentiometer on the RTEM clockwiseto open or counter -clockwise to close. This will set the minimum damper position at an intermediate point of fan operation range of damper for this setting is 0-75%. 6. Momentarily jump across the Test 1 and Test 2 terminals on LTB1, to cycle through test modes to Cool 2. 7. Turn the MIN POS - DESIGN potentiometer on the RTEM clockwiseto open or counter -clockwise to close. This will set the minimum damper position at maximum fan speed. Range of damper for this setting is 0-50%. 8. The economizer minimum damper position for all fan speeds is complete. The RTEM will control minimum damper position along an imaginary line between the 3 damper minimum positions based on fan speed. Note: The RTEM will limit intermediate minimum damper position to ensure proper ventilation based upon the lowfan speed minimum damper position set in Step 3. 9. Replace the filter access panel. The damper will close when the blower circuit is de -energized. Live Electrical Components! Failure to follow all electrical safety precautions when exposed to live electrical components could result in death or serious injury. When necessary to work with live electrical components, have a qualified licensed electrician or other individual who has been properly trained in handling live electrical components perform these tasks. ReliaTel"' Control: Using the Service Test Guide in Table 15, p. 50, momentarily jump across the Test 1 and Test 2 terminals on LTB1 one time to start the Minimum Ventilation Test. RT-SVX21 AB-E N 65 aTRANE` Sequence of Operation Electromechanical Control: Using the Service Test Guide perform the proper test mode connections. 1. Setthe minimum position setpointforthe economizer to the required percentage of minimum ventilation using the setpoint potentiometer located on the Economizer Control (ECA). The economizer will drive to its minimum position setpoint, exhaust fans (if applicable) may start at random, and the supply fan will start when the SERVICE TEST is initiated. Rotating Components! Failure to follow all safety precautions below could result in rotating components cutting and slashing technician which could result in death or serious injury. During installation, testing, servicing and troubleshooting of this product it may be necessary to work with live and exposed rotating components. Have a qualified or licensed service individual who has been properly trained in handling exposed rotating components, perform these tasks. The Exhaust Fan will start anytime the economizer damper position is equal to or greater than the exhaust fan setpoint. 2. Verify that the dampers stroked to the minimum position. ReliaTelT"" Control: Momentarily jump across the Test 1 and Test 2 terminals on LTB1 one additional time if continuing from previous component start-up or until the desired start-up component test is started. Electromechanical Control: Using the Service Test Guide perform the proper test mode connections. 3. Verify that the dampers stroked to the full open position. 4. To stop the SERVICE TEST, turn the main power disconnect switch to the "Off" position or proceed to the next component start-up procedure. Remove electromechanical test mode connections (if applicable). Compressor Start -Up 1. Attach a set of service gauges onto the suction and discharge gauge ports for each circuit. Refer to the refrigerant circuit illustration in the Service Facts. ReliaTelT"" Control: Momentarily jump across the Test 1 and Test 2 terminals on LTB1 one additional time if continuing from previous component start-up or until the desired start-up component Test is started. Electromechanical Control: Using the Service Test Guide perform the proper test mode connections. Scroll Compressors a. Once each compressor has started, verify that the rotation is correct. If a scroll compressor is rotating backwards, it will not pump and a loud rattling sound can be observed. b. If the electrical phasing is correct, before condemning a compressor, interchange any two leads (at the compressor Terminal block) to check the internal phasing. If the compressor runs backward for an extended period (15to 30 minutes), the motor winding can overheat and cause the motor winding thermostat to open. 2. After the compressor and condenser fan have started and operated for approximately 30 minutes, observe the operating pressures. Compare the operating pressures to the operating pressure curve in the Service Facts. 3. Check system superheat. Follow the instruction listed on the superheat charging curve in the Service Facts. Superheat should be within ±5 F ofthe superheat chart value. 4. Repeat steps 1 through 4 for each refrigerant circuit. 5. To stop the SERVICE TEST, turn the main power disconnect switch to the "Off" position or proceed to the next component start-up procedure. Remove electromechanical test mode connections (if applicable). Dehumidification Option Live Electrical Components! Failure to follow all electrical safety precautions when exposed to live electrical components could result in death or serious injury. When necessary to work with live electrical components, have a qualified licensed electrician or other individual who has been properly trained in handling live electrical components perform these tasks. Momentarily jump across the Test 1 and Test 2 terminals of the LTB1 until the unit enters test mode 7 (See Table 15, p. 50). Once the unit is in the reheat test mode, verify that the 3 way valve has shifted to the reheat position and that the supply temperature rises 10°F more than when in cooling mode stage 2. Monitor the suction pressure for 15 minutes. The suction pressure should remain within 5 psi of normal cooling operation. Gas Heat Units Open the main disconnect switch to shut the unit off and to reset the RTRM. 66 RT-SVX21 AB-E N aTRANE` Sequence of Operation ReliaTelT'" Control: Follow the Test Guide in Table 15, p. 50 to start the unit in the heating mode. Momentarily jump across the Test 1 and Test 2 terminals on LTB1 one additional time if continuing from previous component start-up or until the desired start-up component Test is started. Electromechanical Control. Using the Service Test Guide perform the proper test mode connections. When starting the unit for the first time or servicing the heaters, it is a good practice to start the heater with the main gas supply turned "Off". Once the ignition system and components have been checked, open the main power disconnect switch to reset the unit. Final System Setup After completing all of the pre -start and start-up procedures outlined in the previous sections (i.e., operating the unit in each of its Modes through all available stages of cooling and heating), perform these final checks before leaving the unit: • Program the Night Setback (NSB) panel (if applicable) for proper unoccupied operation. Refer to the programming instructions for the specific panel. • Verify that the Remote panel "System" selection switch, "Fan" selection switch, and "Zone Temperature" settings for automatic operation are correct. • Inspect the unit for misplaced tools, hardware, and debris. • Verify that all exterior panels including the control panel doors and condenser grilles are secured in place. • Close the main disconnect switch or circuit protector switch that provides the supply power to the unit's terminal block or the unit mounted disconnect switch. RT-SVX21 AB-E N 67 0 TRANE` Maintenance Hazardous Service Procedures! Failure to follow all precautions in this manual and on the tags, stickers, and labels could result in death or serious injury. Technicians, in order to protect themselves from potential electrical, mechanical, and chemical hazards, MUST follow precautions in this manual and on the tags, stickers, and labels, as well as the following instructions: Unless specified otherwise, disconnect all electrical power including remote disconnect and discharge all energy storing devices such as capacitors before servicing. Follow proper lockout/tagout procedures to ensure the power can not be inadvertently energized. When necessary to work with live electrical components, have a qualified licensed electrician or other individual who has been trained in handling live electrical components perform these tasks. Fan Belt Adjustment - Belt Drive Units Live Electrical Components! Failure to follow all electrical safety precautions when exposed to live electrical components could result in death or serious injury. When necessary to work with live electrical components, have a qualified licensed electrician or other individual who has been properly trained in handling live electrical components perform these tasks. Rotating Components! Failure to follow all safety precautions below could result in rotating components cutting and slashing technician which could result in death or serious injury. During installation, testing, servicing and troubleshooting of this product it may be necessary to work with live and exposed rotating components. Have a qualified or licensed service individual who has been properly trained in handling exposed rotating components, perform these tasks. The fan belts must be inspected periodically to assure proper unit operation. Replacement is necessary if the belts appear frayed or worn. Units with dual belts require a matched set of belts to ensure equal belt length. When removing or installing the new belts, do not stretch them over the sheaves. Loosen the belts using the belt tension adjustment bolts on the motor mounting base. Once the new belts are installed, using a Browning or Gates tension gauge (or equivalent) illustrated in Figure 73, p. 68, adjust the belt tension as follows; 1. To determine the appropriate belt deflection; a. Measure the center -to -center shaft distance (in inches) between the fan and motor sheaves. b. Divide the distance measured in Step la by 64; the resulting value represents the amount of belt deflection that corresponds to the proper belt tension. 2. Set the large O-ring on the belt tension gauge at the deflection value determined in Step 1b. 3. Set the small O-ring at zero on the force scale of the gauge plunger. 4. Placethe largeend of the gauge atthe center of the belt span, then depressthe gauge plunger until the large 0- ring is even with the top of the next belt or even with a straightedge placed across the fan and motor sheaves. Refer to Figure 73, p. 68. 5. Remove the belt tension gauge. The small O-ring now indicates a number other than zero on the plunger's force scale. This number represents the force (in pounds) required to give the needed deflection. 6. Compare the "force" scale reading (Step 5) with the appropriate "force" value listed in Table 23, p. 69. If the "force" reading is outside the range, readjust the belt tension. Note: Actual belt deflection "force" must not exceed the maximum "force" value shown in Figure 73, p. 68. 7. Recheck the belt tension at least twice during the first 2 to 3 days of operation. Belt tension may decrease until the new belts are "run in". Figure 73. Belt tension gauge Deflection = Belt Span (in) 64 Deflection = Belt Span (mm) 152 Force Scale Small Belt Spa❑ 0—Ring (+ Large Span Scale 0—Ring 68 RT-SVX21 AB-E N Table 23. Belt tension measurement and deflection Deflection Force (Lbs.) Belts Cross Section Small P.D Range Super Gripbelts Gripnotch Steel Cable Gripbelts Min. Max. Min. Max. Min. Max 3.0 - 3.6 3 4 1/2 3 7/8 5 1/2 3 1/4 4 A 3.8 - 4.8 3 1/2 5 4 1/2 6 1/4 3 3/4 4 3/4 5.0 - 7.0 4 5 1/2 5 6 7/8 4 1/4 5 1/4 3.4 - 4.2 4 5 1/2 5 3/4 8 4 1/2 5 1/2 B 4.4 - 5.6 5 1/8 7 1/8 6 1/2 9 1/8 5 3/4 7 1/4 5.8 - 8.8 6 3/8 8 3/4 7 3/8 10 1/8 7 8 3/4 Monthly Maintenance Hazardous Voltage! Failure to disconnect power before servicing could result in death or serious injury. Disconnect all electric power, including remote disconnects before servicing. Follow proper lockout/tagout procedures to ensure the power can not be inadvertently energized. Before completing the following checks, turn the unit OFF and lock the main power disconnect switch open. Filters Inspect the return air filters. Clean or replace them if necessary. If included, leave filter removal tool in unit Refer to the unit Service Facts for filter information. Return Air Smoke Detector Maintenance Airflow through the unit is affected by the amount of dirt and debris accumulated on the indoor coil and filters. To insure that airflow through the unit is adequate for proper sampling by the return air smoke detector, complete adherence to the maintenance procedures, including recommended intervals between filter changes, and coil cleaning is required. Periodic checks and maintenance procedures must be performed on the smoke detector to insure that it will function properly. For detailed instructions concerning these checks and procedures, refer to the appropriate section(s) of the smoke detector Installation and Maintenance Instructions provided with the literature package for this unit. Condensate Overflow Switch During maintenance, the switch float (black ring) must be checked to ensure free movement up and down. Cooling Season • Check the unit's drain pans and condensate piping to ensure that there are no blockages. aTRANE` Maintenance • Inspect the evaporator and condenser coils for dirt, bent fins, etc. If the coils appear dirty, clean them according to the instructions described in "Coil Cleaning" later in this section. • Manually rotate the condenser fan(s) to ensure free movement and check motor bearings for wear. Verify that all of the fan mounting hardware is tight. • Inspect the F/A-R/A damper hinges and pins to ensure that all moving parts are securely mounted. Keep the blades clean as necessary. • Verify that all damper linkages move freely; lubricate with white grease, if necessary. • Check supply fan motor bearings; repair or replace the motor as necessary. • Check the fan shaft bearings for wear. Replace the bearings as necessary. • Check the supply fan belt. If the belt is frayed or worn, replace it. Refer to the "Fan Belt Adjustment" section for belt replacement and adjustments. • Verify that all wire terminal connections are tight. • Remove anycorrosion present on the exterior surfaces of the unit and repaint these areas. • Generally inspect the unit for unusual conditions (e.g., loose access panels, leaking piping connections, etc.) • Make sure that all retaining screws are reinstalled in the unit access panels once these checks are complete. • With the unit running, check and record the: ambient temperature; compressor suction and discharge pressures (each circuit); superheat (each circuit); • Record this data on an "operator's maintenance log" like the one shown in Table 24, p. 71. If the operating pressures indicate a refrigerant shortage, measure the system superheat. For guidelines, refer to the "Compressor Start -Up" section. Important: Do not release refrigerant to the atmosphere! If adding or removing refrigerant is required, the service technician must comply with all federal, state and local laws. Heating Season • Inspect the unit's air filters. If necessary, clean or replace them. • Check supply fan motor bearings; repair or replace the motor as necessary. • Inspect both the main unit control panel and heat section control box for loose electrical components and terminal connections, as well as damaged wire insulation. Make any necessary repairs. • Clean burner area, verify gas heat system operates properly. RT-SVX21 AB-E N 69 aTRANE` Maintenance Coil Cleaning Regular coil maintenance, including annual cleaning, enhances the unit's operating efficiency by minimizing: compressor head pressure and amperage draw, evaporator water carryover, fan brake horsepower due to increase static pressure losses, airflow reduction. At least once each year, or more often if the unit is located in a "dirty" environment, clean the evaporator and condenser coils using the instructions outlined below. Be sure to follow these instructions as closely as possible to avoid damaging the coils. Note: For units equipped with hail guards follow removal procedure listed below. Hail Guard Removal • Unlatch hail guard. • Pull thetop of the hail guard outward until the fastener studs are free of the retaining nuts. • Lift the hail guard from the lower retaining bracket and set aside. Microchannel (MCHE) Coils Coil Damage! Failure to follow instructions below could result in coil damage. DO NOT use any detergents with microchannel condenser coils. Use pressurized water or air ONLY, with pressure no greater than 600psi. For additional information regarding the proper microchannel coil cleaning procedure, refer to service bulletin RT-SVB83*-EN. Due to the soft material and thin walls of the MCHE coils, the traditional field maintenance method recommended for Round Tube Plate Fin (RTPF) coils does not apply to microchannel coils. Moreover, chemical cleaners are a riskfactorto MCHE due to the material of the coil. The manufacturer does not recommend the use of chemical cleaners to clean microchannel coils. Using chemical cleaners could lead to warranty claims being further evaluated for validity and failure analysis. The recommended cleaning method for microchannel condenser coils is pressurized water or air with a non - pinpoint nozzle and an ECU of at least 180with pressure no greater than 600 psi. To minimize the risk of coil damage, approach the cleaning of the coil with the pressure washer aimed perpendicularto theface of the coil during cleaning. Note: For more details on Microchannel coil cleaning, please refer to bulletin RT-SVB83*-EN. Round Tube Plate Fin (RTPF) Coils To clean refrigerant coils, use a soft brush and a sprayer (either a garden pump -up type or a high-pressure sprayer). A high -quality detergent is also required; suggested brands include "SPREX A.C.", "OAKITE 161 "OAKITE 166" and "COILOV. If the detergent selected is strongly alkaline (ph value exceeds 8.5), add an inhibitor. Hazardous Chemicals! Failure to follow all safety instructions below could result in death or serious injury. Coil cleaning agents can be either acidic or highly alkaline and can burn severely if contact with skin occurs. Handle chemical carefully and avoid contact with skin. ALWAYS wear Personal Protective Equipment (PPE) including goggles or face shield, chemical resistant gloves, boots, apron or suit as required. For personal safety refer to the cleaning agent manufacturer's Materials Safety Data Sheet and follow all recommended safe handling practices. 1. Remove enough panels from the unit to gain access to the coil. 2. Protect all electrical devices such as motors and controllers from any over spray. 3. Straighten any bent coil fins with a fin comb. Hazardous Pressures! Failure to follow safety precautions below could result in coil bursting, which could result in death or serious injury. Coils contain refrigerant under pressure. When cleaning coils, maintain coil cleaning solution temperature under 150°F to avoid excessive pressure in the coil. 4. Mix the detergent with water according to the manufacturer's instructions. If desired, heat the solution BUT DO NOT EXCEED 150°F maximum to improve its cleansing capability. 5. Pour the cleaning solution into the sprayer. If a high- pressure sprayer is used: a. do not allow sprayer pressure to exceed 600 psi. b. the minimum nozzle spray angle is 15 degrees. c. maintain a minimum clearance of 6" between the sprayer nozzle and the coil. d. spray the solution perpendicular (at 90 degrees) to the coil face. 6. Spray the leaving -airflow side of the coil first; then spray the opposite side of the coil. Allow the cleaning solution to stand on the coil for five minutes. 7. Rinse both sides of the coil with cool, clean water. 70 RT-SVX21AB-EN 8. Inspect both sides of the coil; if it still appears to be dirty, repeat Step 6 and Step 7. 9. Reinstall all of the components and panels removed in Step 1 and any protective covers installed in Step 2. Note: For units equipped with hail guards follow reinstallation procedure listed below. Hail Guard Reinstallation 10. To reinstall the hail guard, locate the bottom of the hail guard in the lower bracket and secure it to the upper unit bracket with the attached fasteners. Note: Secure hail guard latches. Figure 74. Hail guard t LATCH PULL DOWN TO DETAIL A DISENGAGE GUARD 11. Restore the unit to its operational status and check system operation. Table 24. Sample maintenance log aTRANE` Maintenance Annual Maintenance • Clean and repaint any corroded surface. Final Process For future reference, you may find it helpful to record the unit data requested in the blanks provided. Complete Model Number: Unit Serial Number: Wiring Diagram Numbers (from unit control panel): Connections: Schematics: Refrigerant Circuit #1 Refrigerant Circuit #2 Suct. Disch. Liquid Disch. Liquid Current Press. Press. Press. Super Sub- Compr. Suct. Press. Press. Super- Sub - Ambient Compr. Psig/ Psig/ Psig/ -heat cool. Oil Press. Psig/ Psig/ heat cool. Date Temp. F/C Oil Level kPa kPa kPa F/C F/C Level Psig/kPa kPa kPa F/C F/C -ok -ok low low ok ok low low ok ok low low ok\ ok low low -ok -ok - low - low Note: Check and record the data requested above each month during the cooling season with the unit running. RT-SVX21 AB-E N 71 0 TRANE` Troubleshooting Hazardous Service Procedures! Failure to follow all precautions in this manual and on the tags, stickers, and labels could result in death or serious injury. Technicians, in order to protect themselves from potential electrical, mechanical, and chemical hazards, MUST follow precautions in this manual and on the tags, stickers, and labels, as well as the following instructions: Unless specified otherwise, disconnect all electrical power including remote disconnect and discharge all energy storing devices such as capacitors before servicing. Follow proper lockout/tagout procedures to ensure the power can not be inadvertently energized. When necessary to work with live electrical components, have a qualified licensed electrician or other individual who has been trained in handling live electrical components perform these tasks. ReliaTelTM Control The RTRM has the ability to provide the service personnel with some unit diagnostics and system status information. Before turning the main power disconnect switch "Off", follow the steps below to check the ReliaTel Refrigeration Module (RTRM). All diagnostics and system status information stored in the RTRM will be lost when the main power is turned "Off'. Live Electrical Components! Failure to follow all electrical safety precautions when exposed to live electrical components could result in death or serious injury. When necessary to work with live electrical components, have a qualified licensed electrician or other individual who has been properly trained in handling live electrical components perform these tasks. To prevent injury or death from electrocution, it is the responsibility of the technician to recognize this hazard and use extreme care when performing service procedures with the electrical power energized. 1. Verify LED on face of the phase monitor is green. If LED is red, correct supply power fault. 2. Verify that the Liteport LED on the RTRM is burning continuously. If the LED is lit, go to Step 3. 3. If the LED is not lit, verify that 24 Vac is presence between J1-1 and J1-2. If 24 Vac is present, proceed to Step 4. If 24 Vac is not present, check the unit main power supply, check transformer (TNS1). Proceed to Step 4 if necessary. 4. Utilizing "Method 1" or "Method 2" in the "System Status Diagnostic" section, check the following: • System status • Heating status • Cooling status If a system failure is indicated, proceed to Step 5. If no failures are indicated, proceed to Step 6. 5. If a System failure is indicated, recheck Step 2 and Step 3. If the LED is not lit in Step 2, and 24 Vac is present in Step 3, the RTRM has failed. Replace the RTRM. 6. If no failures are indicated, use one of the TEST mode procedures described in the "Unit Start -Up" section to startthe unit. This procedurewill allowyou to checkall of the RTRM outputs, and all of the external controls (relays, contactors, etc.) that the RTRM outputs energize, for each respective mode. Proceed to Step 7. Step the system through all of the available modes, and verify operation of all outputs, controls, and modes. If a problem in operation is noted in any mode, you may leave the system in that mode for up to one hour while troubleshooting. Refer to the sequence of operations for each mode, to assist in verifying proper operation. Make the necessary repairs and proceed to Step 8 and Step 9. 8. If no abnormal operating conditions appear in the test mode, exitthe test mode by turning the power "Off' at the main power disconnect switch. 9. Refer to the individual component test procedures if other microelectronic components are suspect. System Status Checkout Procedure "System Status" is checked by using one of the following two methods: Method 1 If the Zone Sensor Module (ZSM) is equipped with a remote panel with LED status indication, you can checkthe unitwithin the space. If the ZSM does not have LED's, use Method 2. BAYSENS110*, BAYSENS109*, BAYSENS119*, BAYSENS023A all have the remote panel indication feature. The LED descriptions are listed below. Zone Sensor LED 1 (System) "On" during normal operation. "Off" if a system failure occurs or the LED fails. "Flashing" indicates test mode. Zone Sensor LED 2 (Heat) "On" when the heat cycle is operating. "Off" when the heat cycle terminates or the LED fails. "Flashing" indicates a heating failure. 72 RT-SVX21AB-EN Zone Sensor LED 3 (Cool) "On" when the cooling cycle is operating. "Off" when the cooling cycle terminates or the LED fails. "Flashing" indicates a cooling failure. Zone Sensor LED 4 (Service) "On" indicates a clogged filter. "Off" during normal operation. "Flashing" indicates an evaporator fan or condensate overflow switch failure. Below is the complete listing of failure indication causes System failure Check the voltage between terminals 6 and 9 on J6, it should read approximately32 Vdc. If no voltage is present, a system failure has occurred. Refer to Step 4 in the previous section for the recommended troubleshooting procedure. Heating Failure Verify Heat Failure by Ignition Module (IGN) LED indicator: OFF: No Power or Failure ON: Normal Slow Flash: Normal, Heat Call Fast Flash: Error Code: 1 Flash: Communication Failure 2 Flashes: System Lockout 3 Flashes: Pressure Switch Fail 4 Flashes: TC01 or TCO2 Open 5 Flashes: Flame w/o Gas Valve 6 Flashes: Flame Rollout Open Cooling Failure • Cooling and heating set point (slide pot) on the zone sensor has failed. Refer to the "Zone Sensor Test Procedure" section. • Zone temperature thermistor ZTEMP on ZTS failed. Refer to the "Zone Sensor Test Procedure" section. • CC1 or CC2 24 Vac control circuit has opened, check CC1 and CC2 coils, and any of the controls below that apply to the unit (HPC1, HPC2). • LPC1 has opened during the 3 minute minimum "on time" during 4 consecutive compressor starts, check LPC1 or LPC2 bytesting voltage between the J1-1 and J3-2 terminals on the RTRM and ground. If 24 Vac is present, the LPC's has not tripped. If no voltage is present, LPC's has tripped. Service Failure • Ifthesupplyfan provingswitch has closed, the unit will not operate (when connected to RTOM), check the fan motor, belts, and proving switch. aTRANE` Troubleshooting • Clogged filter switch has closed, check the filters. • If the condensate overflow switch is closed, the unit will not operate. Make sure the float switch is not in a tripped condition, and check for an "open" between wires connecting to RTOM J6-1, J6-2 (ReliaTeITI controls). Simultaneous Heat and Cool Failure • Emergency Stop is activated Method 2 The second method for determining system status is done by checking voltage readings at the RTRM (J6). The system indication descriptions and the approximate voltages are listed below. System Failure • Measure the voltage between terminals J6-9 and J6-6. • Normal Operation = approximately 32 Vdc • System Failure = less than 1 Vdc, approximately 0.75 Vdc • Test Mode = voltage alternates between 32 Vdc and 0.75 Vdc Heat Failure • Measure the voltage between terminals J6-7 and J6-6. • Heat Operating = approximately 32 Vdc • Heat Off = less than 1 Vdc, approximately 0.75 Vdc • Heating Failure = voltage alternates between 32 Vdc and 0.75 Vdc Cool Failure • Measure the voltage between terminals J6-8 and J6-6. • Cool Operating = approximately 32 Vdc • Cool Off = less than 1 Vdc, approximately 0.75 Vdc • Cooling Failure = voltage alternates between 32 Vdc and 0.75 Vdc Service Failure • Measure the voltage between terminals J6-10 and J6- 6. • Clogged Filter = Approximately 32 Vdc. • Normal = Less than 1 Vdc, approximately 0.75 Vdc Fan Failure = voltage alternates between 32 Vdc and 0.75 Vdc. To use LED's for quick status information at the unit, purchase a BAYSENS110* ZSM and connect wires with alligator clamps to terminals 6 through 10. Connected each respective terminal wire (6through 10)from theZone Sensor to the unit J6 terminals 6 through 10. Note: If the system is equipped with a programmable zone sensor, BAYSENS1 19*the LED indicatorswill notfunction whilethe BAYSENS110* is connected. RT-SVX21 AB-E N 73 aTRANE` Troubleshooting Resetting Cooling and Ignition Lockouts Cooling Failures and Ignition Lockouts are reset in an identical manner. Method 1 explains resetting the system from the space; Method 2 explains resetting the system at the unit. Note: Before resetting Cooling Failures and Ignition Lockouts check the Failure Status Diagnostics by the methods previously explained. Diagnosticswill be lost when the power to the unit is disconnected. Method 1 To reset the system from the space, turn the "Mode" selection switch at the zone sensor to the "Off" position. After approximately 30 seconds, turn the "Mode" selection switch to the desired mode, i.e. Heat, Cool or Auto. Method 2 To reset the system at the unit, cycle the unit power by turning the disconnect switch "Off" and then "On". Lockouts can be cleared through the building management system. Refer to the building management system instructions for more information. Zone Temperature Sensor (ZTS) Service Indicator The ZSM SERVICE LED is a generic indicator, that will signal the closing of a Normally Open switch at any time, providing the Indoor Motor (IDM) is operating. This indicator is usually used to indicate a clogged filter, or an air side fan failure. The RTRM will ignore the closing of this Normally Open switch for 2 (±1) minutes. This helps prevent nuisance SERVICE LED indications. The exception is the LED will flash 40 seconds after the fan is turned "On" if the Fan Proving Switch is not made. Clogged Filter Switch This LED will remain lit the entire time that the Normally Open switch is closed. The LED will be turned off immediately after resetting the switch (to the Normally Open position), or any time that the IDM is turned "Off". If the switch remains closed, and the IDM is turned "On", the SERVICE LED will be turned "On" again afterthe 2 (±1) minute ignore delay. This LED being turned "On", will have no other affect on unit operation. It is an indicator only. Fan Failure Switch When the "Fan Failure" switch is wired to the RTOM, the LED will remain flashing the entire time the fan proving switch is closed, indicating a fan failure, and itwill shutthe unit operations down. Condensate Overflow Switch When the "Condensate Overflow Switch" is closed, a drain pan overflow condition is indicated and it will shut unit operations down. Zone Temperature Sensor (ZTS) Tests Note: These procedures are not for programmable or digital models and are conducted with the Zone Sensor Module electrically removed from the system. Test 1 - Zone Temperature Thermistor (ZTEMP) This component is tested by measuring the resistance between terminals 1 and 2 on the Zone Temperature Sensor. Below are some typical indoor temperatures, and corresponding resistive values. Test 2 - Cooling Set Point (CSP) and Heating Set Point (HSP) Table 25. Cooling setpoint and heating setpoint Zone Temperature 50oF 10.0oC 550F 12.80C Nominal ZTEMP Resistance 19.9 K - Ohms 17.47 K - Ohms 60OF 15.60C 15.3 K - Ohms 650F 18.30C 13.49 K - Ohms 70OF 21.10C 11.9 K - Ohms 75OF 23.90C 10.50 K - Ohms 80oF 26.7oC 9.3 K - Ohms 850F 29.40C 8.25 K - Ohms 90OF 32.20C 7.3 K - Ohms The resistance of these potentiometers are measured between the following ZSM terminals. Refer to the chart above for approximate resistances at the given setpoints. Cool SP = Terminals 2 and 3 Range = 100 to 900 Ohms approximate Heat SP = Terminals 2 and 5 Range = 100 to 900 Ohms approximate Test 3 - System Mode and Fan Selection The combined resistance of the Mode selection switch and the Fan selection switch can be measured between terminals 2 and 4 on the Zone Sensor. The possible switch combinations are listed below with their corresponding resistance values. 74 RT-SVX21 AB-E N Test 4 - LED Indicator Test, (SYS ON, HEAT, COOL and SERVICE) Method 1 Testing the LED using a meter with diode test function. Test both forward and reverse bias. Forward bias should measure a voltage drop of 1.5 to 2.5 volts, depending on your meter. Reverse bias will show an Over Load, or open circuit indication if LED is functional. Method 2 Testing the LED with an analog Ohmmeter. Connect Ohmmeter across LED in one direction, then reverse the leads for the opposite direction. The LED should have at least 100 times more resistance in reverse direction, as compared with the forward direction. If high resistance in both directions, LED is open. If low in both directions, LED is shorted. Method 3 To test LED's with ZSM connected to unit, test voltages at LED terminals on ZSM. A measurement of 32 Vdc, across an unlit LED, means the LED has failed. Relative Humidity Sensor Test This component is measured by measuring the DC mA output signal on the Relative Humidity Sensor. Verify accuracy of the sensor annually. If the output reading is DC mA 0, first verify that power is applied to the sensor. A reading of 4 corresponds to 0% RH and 20 DC mA corresponds to 100% RH. RH DC mA 30 8.8 40 10.4 50 12.0 60 13.6 70 15.2 80 16.8 Note: Measurements should be made from LED common (ZSM terminal 6 to respective LED terminal). Programmable and Digital Zone Sensor Test Testing serial communication voltage 1. Verify 24 Vac is present between terminals J6-14 and J6-1 1. 2. Disconnect wires from J6-11 and J6-12. Measure the voltage between J6-11 and J6-12, should be about 32 Vdc. 3. Reconnect wires to terminals J6-11 and J6-12. Measure voltage again between J6-11 and J6-12, voltage should flash high and low every 0.5 seconds. The voltage on the low end will measure about 19 Vdc, aTRANE` Troubleshooting while the voltage on the high end will measure from approximately 24 to 38 Vdc. 4. Verify all modes of operation, by running the unit through all of the steps in the "Test Modes" section discussed in "Unit Start -Up". 5. After verifying proper unit operation, exit the test mode. Turn the fan on continuously at the ZSM, by pressing the button with the fan symbol. If the fan comes on and runs continuously, the ZSM is good. If you are not able to turn the fan on, the ZSM is defective. ReliaTelT" Refrigeration Module (RTRM) Default Chart If the RTCI loses input from the building management system, the RTRM will control in the default mode after approximately 15 minutes. If the RTRM loses the Heating and Cooling setpoint input, the RTRM will control in the default mode instantaneously. The temperature sensing thermistor in the Zone Sensor Module is the only component required for the "Default Mode" to operate. Unit Operation without a Zone Sensor This procedure is for temporary operation only. The economizer and condenser fan cycling functions are disabled. Hazardous Voltage! Failure to disconnect power before servicing could result in death or serious injury. Disconnect all electric power, including remote disconnects before servicing. Follow proper lockout/tagout procedures to ensure the power can not be inadvertently energized. 1. Open and Lock the unit disconnect switch. 2. Remove the Outside Air Sensor (OAS) from the condenser section of unit. 3. Use two (2) wire nuts, to individually cap the wires. 4. Locate the RTRM (J6). Connect two (2) wires to terminals J6-1 and 2. 5. Connect the sensor (OAS) using two wire nuts to the two (2) field supplied wires that were connected to terminals 1 and 2 on J6. Unit Economizer Control (ECA) Troubleshooting ReliaTelT"' Control Verify Economizer Status by Economizer Actuator (ECA) LED indicator: • OFF: No power or failure • ON: Normal, OK to economize RT-SVX21 AB-E N 75 aTRANE` Troubleshooting • Slow Flash: Normal, not OK to economize • Fast Flash - 1/2 second on / 2 seconds off: • Error Code: Communications failure • Pulse Flash:2 seconds on / 1/2 second off: • Error Code: • 1 Flash: Actuator Fault • 2 Flashes: CO2 Sensor • 3 Flashes: RA Humidity Sensor • 4 Flashes: RA Temp Sensor • 5 Flashes: OA Quality Sensor • 6 Flashes: OA Humidity Sensor • 7 Flashes: OA Temp Sensor • 8 Flashes: MA Temp Sensor • 9 Flashes: RAM Fault • 10 Flashes: ROM Fault • 11 Flashes: EEPROM Fault Electromechanical Control The IGN has the ability to provide the service personnel with some unitdiagnostics and system status information Before turning the main power disconnect switch "Off", followthe steps belowto checkthe Ignition Module (IGN) Live Electrical Components! Failure to follow all electrical safety precautions when exposed to live electrical components could result in death or serious injury. When necessary to work with live electrical components, have a qualified licensed electrician or other individual who has been properly trained in handling live electrical components perform these tasks. To prevent injury or death from electrocution, it is the responsibility of the technician to recognize this hazard and use extreme care when performing service procedures with the electrical power energized. 1. Verify LED on face of the phase monitor is green. If LED is red, correct supply power fault. 2. Verifythatthe LED on the IGN is burning continuously. If the LED is lit, go to Step 4. 3. Ifthe LED is not lit, verify that 24 Vac is present between R and B. If the LED is not lit and 24 Vac is present replace the IGN. If 24 Vac is not present, check transformer (TNS1). Proceed to Step 4 if necessary. 4. If no failures are indicated, use the TEST mode procedures described in the "Unit Start -Up" section or thermostat to start the unit. This procedure will allow you to check all of the external controls (relays, contactors, etc) and the IGN. 5. Testthe system through all of the available modes, and verify operation of all outputs, controls, and modes. Refer to the sequence of operations for each mode, to assist in verifying proper operation. Make the necessary repairs and proceed to Step 6 and Step 7. 6. If no abnormal operating conditions appear in the test mode, exit the test mode by turning the power "Off" at the main power disconnect switch and removing the test mode connections. 7. Refer to the individual component test procedures if other components are suspect. Heating Failure Verify Heat Failure by Ignition Module (IGN) LED indicator: • OFF: No Power or Failure • ON: Normal • Slow Flash: Normal, Heat Call • Fast Flash: Error Code: 1 Flash: No Communication 2 Flashes: System Lockout 3 Flashes: Pressure Switch Fail 4 Flashes: TC01 or TCO2 Open 5 Flashes: Flame w/o Gas Valve 6 Flashes: Flame Rollout Open Cooling Failure • Cooling and heating set point (slide pot) on the thermostat has failed. • CC1 or CC2 24 Vac control circuit has opened, check CC1 and CC2 coils, and any of the controls below that apply to the unit (HPC1, HPC2, LPC1, LPC2, FrostatT°^ ) Resetting Cooling and Ignition Lockouts Cooling Failures and Ignition Lockouts are reset in an identical manner. Method 1 explains resetting the system from the space; Method 2 explains resetting the system at the unit. Method 1 To reset the system from the space, turn the "Mode" selection switch at the thermostat to the "Off" position. After approximately 30 seconds, turn the "Mode" selection switch to the desired mode, i.e. Heat, Cool or Auto. Method 2 To reset the system at the unit, cycle the unit power by turning the disconnect switch "Off' and then "On". 76 RT-SVX21AB-EN qWTRANE Troubleshooting Table 26. Fault detection and diagnostic codes Primary Fault Codes Information Code Failures Mixed Air Outdoor Economizer RTEM Pressure Temp Sensor Airflow Space Unit Fails Unit Damper Temp Temp Actuator Comm Dead band Fail Sensor Fail Press Dead to Economizing o Position /o Sensor Sensor Fault Fail Fail (If Used) (If Used) bandFail Economize When It Indicated Fail Fail (If Used) (If Used) Should Not Damper stuck X X(a) X(a)* X(a) X X at Minimum Damper Stuck X X(a) X(a) X(a) X X Open Mixed Sensor X X Failure Supply Air X X Sensor Failure Outdoor Air Temperature X X Fail Power loss to X RTEM Failed or Power Loss to X X Actuator Mechanical Failure of X Actuator (a) If goes out of range. Table 27. Low leak economizer sensor values Sensor Values Data Temp of Resistance (K ohms) Temp of Resistance (K ohms) Temp of Resistance (K ohms) 40 26.097 54 17.847 68 12.435 41 25.383 55 17.382 69 12.126 42 24.690 56 16.930 70 11.827 43 24.018 57 16.491 71 11.535 44 23.367 58 16.066 72 11.252 45 22.736 59 15.654 73 10.977 46 22.132 60 15.253 74 10.709 47 21.530 61 14.864 75 10.448 48 20.953 62 14.486 76 10.194 49 20.396 63 14.119 77 9.949 50 19.854 64 13.762 78 9.710 51 19.330 65 13.416 79 9.477 52 18.821 66 13.078 80 9.250 53 18.327 67 12.752 81 9.030 RT-SVX21 AB-E N 77 aTRANE` Troubleshooting Unit Economizer Control (ECA) Test Procedures Electromechanical Control This series of tests will allow you to diagnose, and determine where, and if a problem exists in the system economizer operation. Test 1 determines if the problem is in the Unit, or if it is in the ECA. Test 2 tests sensor inputs. Test 3 tests the resistors and sensors. Conduct the tests in numerical order until problem is found. Test 1 Verifying that the economizer actuator (ECA) is functional: 1. Using the "Test Mode" described in the "System Start - Up" section, put the unit into the economizer mode and verify that the economizer actuator (ECA) drives fully open (approximately 90 seconds). 2. If the ECA is not driving the dampers, verify that 24 Vac is between the ECA terminals TR and TR1 is present. If 24 volts is not present, a wiring or terminal problem exists from the control transformer. Make any necessary repairs, see wiring diagrams to troubleshoot. 3. If 24 Vac is present, adjust the minimum position potentiometer fully clockwise. If the actuator does not drive, the economizer actuator is bad. Replace the ECA. Test 2 Testing the ECA resistors and sensors 1. Testing the Mixed Air Sensor (MAS). Disconnect the wires connected to T and T1 on the ECA, and; a. Measure the resistance of the sensor between the wires 180B and 181 B. b. Measure the temperature at the MAS location. Using the Temperature versus Resistance chart, verify the accuracy of the MAS. Replace the sensor if it is out of range. 2. Testing the Outdoor Air Switch. If the temperature is above 60 degrees, it will need to be chilled. Measure the resistance of the sensor on the ECA SO and +. The resistance should be approximately 390 Ohms. Replace the Switch if it is open. Replace the ECA if it is out of range. 3. Testing the R1 Resistance. Measure the resistance of the sensor on the ECA SR and +. The resistance should be approximately 420 Ohms. Replace the ECA if it is out of range. 4. Testing the R2 Resistance. Measure the resistance of the sensor on the ECA P and P1. The resistance should be approximately 130 Ohms. Replace the ECA if it is out of range. Troubleshooting procedures for Direct Drive Plenum Fan Prior to troubleshooting, verify all wiring and wiring connections. The motor has internal protections that will shut down the motor before damage occurs. A power cycle is required to reset some of the internal protections. Before proceeding, power down unitfor 1 minute and then power on. Please follow steps sequentially unless directed differently in solution. Refer to RT-SVP08*-EN for a Comprehensive Troubleshooting Guide. 78 RT-SVX21 AB-E N 0 TRANE' Wiring Diagrams Table 28. Wiring diagram matrix (8) Schematic Type Drawing Number Description Control ReliaTelTM 230,460,575V 1213-1641 YSC036-06OG ReliaTel controls Control ReliaTelTM 230,460,575V 4366-7217 YHC(037-067) Control ReliaTel TM 230,460,575V 4366-4571 Y(S,H)C(036,048)E/F (1,3 Phase) and YHC060F (1-Phase), ReliaTel Controls, X13 IDM Control ReliaTelTM 230,460,575V 4366-1015 Y(S,H)C(036-090)E/F, ReliaTel Controls, Belt -Drive IDM Control ReliaTel TM 230,460,575V 4366-4703 YSC060E (1,3 Phase) and YHC060E/F (3-Phase), ReliaTel Controls, X13 IDM Control ReliaTelTM 230,460,575V 1213-2389 YSC(072-090)H ReliaTel Gas Heat Control ReliaTelTM 230,460,575V 1213-2391 YSC(092-120)H ReliaTel Gas Heat Control ReliaTelTM 230,460,575V 4366-1042 YSC(092,102)F, ReliaTel Controls Control ReliaTelTM 230,460,575V 4366-7436 (YHC074-102,YSC12O)F, ReliaTel Controls Control ReliaTelTM 230V/460V 1213-2411 YHC120F, ReliaTel Controls Control ReliaTelTM 575V 1213-2412 YHC120F, ReliaTel Controls Control Electromechanical 230,460,575V 1213-1644 YSC(036-060)G Electromechanical Controls Control Electromechanical 230,460,575V 4366-8386 Y(S,H)C(036,048)E/F (1,3 Phase) and YHC060F (I -Phase), Electromechanical Controls, X13 IDM Control Electromechanical 230,460,575V 4366-8383 Y(S,H)C(036-060)E/F, Electromechanical Controls, Belt - Drive IDM Control Electromechanical 230,460,575V 4366-8387 YSC060E (1,3 Phase) and YHC060E/F (3-Phase), Electromechanical Controls, X13 IDM Control Electromechanical 230,460,575V 4366-8385 Y(S,H)C(072,090)F, Electromechanical Controls Control Electromechanical 230,460,575V 1213-2414 YSC(072-120)H Electromechanical Gas Heat Control Electromechanical 230,460,575V 4366-8384 YSC(092,102)F, Electromechanical Controls Control Electromechanical 230,460,575V 4366-8388 (YHC074-102,YSC12O)F, Electromechanical Controls Control Electromechanical 230V/460V 1213-2409 YHC120F, Electromechanical Controls Control Electromechanical 575V 1213-2410 YHC120F, Electromechanical Controls Power ReliaTelTM 230V 1213-1637 YSC(036-060)G3 ReliaTel Controls Power ReliaTelTM 230V 4366-7179 YHC(037-067) (230V) Power ReliaTelTM 230V 4366-4576 Y(S,H)C(036-060)E/F (I -Phase) Power ReliaTelTM 230V 4366-5163 YHC(036-060)E/F (230V 3-Phase), X13 IDM Power ReliaTelTM 230V 4366-1016 Y(S,H)C(036-090)E/F (230V 3-Phase), Belt -Drive IDM Power ReliaTelTM 230V 4366-1033 YSC(092,102)F (230V) Power ReliaTelTM 230V 1213-2280 (YHC074-102, YSC120)F (230V), ReliaTel Controls Power ReliaTelTM 230V 1213-2411 YHC120F, ReliaTel Controls Power ReliaTelTM 460V and/or 575V 1213-1638 YSC(036-060)G4 ReliaTel Controls Power ReliaTelTM 460V and/or 575V 1213-1662 YSC(036-060)GW ReliaTel Controls Power ReliaTelTM 460V and/or 575V 4366-7180 YHC(037-067) (460V) Power ReliaTelTM 460V and/or 575V 4366-5164 YHC(036-060)E/F (460V), X13 IDM Power ReliaTelTM 460V and/or 575V 4366-1005 Y(S,H)C(036-090)E/F (460V,575V), Belt -Drive IDM Power ReliaTelTM 460V and/or 575V 4366-1034 YSC(092,102)F (460V,575V) Power ReliaTelTM 460V and/or 575V 1213-2281 (YHC074-102, YSC12O)F (460V), ReliaTel Controls Power ReliaTelTM 460V and/or 575V 1213-2282 YSC120F (575V), ReliaTel Controls Power ReliaTelTM 460V 1213-2411 YHC120F, ReliaTel Controls Power ReliaTelTM 575V 1213-2412 YHC120F, ReliaTel Controls Power Electromechanical 230V 1213-1637 YSC(036-060)G3 Electromechanical Controls Power Electromechanical 230V 1213-2409 YHC120F, Electromechanical Controls Power Electromechanical 230V 1213-2275 YHC(074-102)F, YSC120F, Electromechanical Controls Power Electromechanical 460V and/or 575V 1213-1638 YSC(036-060)G4 Electromechanical Controls Power Electromechanical 460V and/or 575V 1213-1662 YSC(036-060)GW Electromechanical Controls Power Electromechanical 460V and/or 575V 4366-1005 Y(S,H)C(036-090)E/F (460V,575V), Belt -Drive IDM Power Electromechanical 460V and/or 575V 4366-1005 Y(S,H)C(036-090)E/F (460V,575V), Belt -Drive IDM Power Electromechanical 460V and/or 575V 1213-2276 YSC120F4, YHC(074-102)F4, Electromechanical Controls Power Electromechanical 460V and/or 575V 1213-2277 YSC(120)FW, YHC(074-102)FW, Electromechanical Controls RT-SVX21 AB-E N 79 AIM TRANE Wiring Diagrams Table 28. Wiring diagram matrix (a) Schematic Type Drawing Number Description Power Electromechanical 460V 1213-2409 YHC120F, Electromechanical Controls Power Electromechanical 575V 1213-2410 YHC120F, Electromechanical Controls Power Electromechanical/ ReliaTelTM 230,460,575V 1213-2384 YSC(072-120)H Constant Volume IDM Power Electromechanical/ ReliaTelTM 230,460,575V 1213-2385 YSC(072-120)H Multispeed IDM, SZVAV, MZVAV Connection ReliaTelTM 230V 1213-1672 YSC(036-060)G3 ReliaTel Controls Connection ReliaTelTM 230V 4366-7340 YHC(037) (230V) Connection ReliaTelTM 230V 4366-8247 YHC037E (230V), 17 Plus with Multi -Zone VAV Connection ReliaTelTM 230V 4366-7342 YHC(047-067) (230V) Connection ReliaTelTM 230V 4366-8249 YHC(047, 067)E (230V), 17 Plus with Multi -Zone VAV Connection ReliaTelTM 230V 4366-4564 Y(S,H)C(036,048)E/F, YHC060F (I -Phase), ReliaTel Controls Connection ReliaTelTM 230V 4366-5185 YHC(036,048)E/F (230V 3-Phase), ReliaTel Controls, X13 IDM Connection ReliaTelTM 230V 4366-1522 Y(S,H)C(036-060)E/F (230V 3-Phase), ReliaTel Controls, Belt -Drive IDM Connection ReliaTelTM 230V 4366-5186 YHC060E/F (230V 3-Phase), ReliaTel Controls, X13 IDM Connection ReliaTelTM 230V 4366-1539 Y(S,H)C(072,090)F (230V), ReliaTel Controls Connection ReliaTelTM 230V 4366-7449 YHC120F (3-Phase), ReliaTel Controls Connection ReliaTelTM 230V 4366-8254 YHC(074-120)F ReliaTel Controls, with Multi -Zone VAV Connection ReliaTelTM 230V 4366-1530 YSC(092,102)F (230V), ReliaTel Controls Connection ReliaTelTM 230V 4366-7451 (YSC120,YHC074-102)F (230V), ReliaTel Controls Connection ReliaTelTM 230V 4366-8255 YHC(074-102)F, YSC120F (230V), ReliaTel Controls with Multi -Zone VAV Connection ReliaTelTM 230,460,575V 1213-2662 YSC(072-090)H ReliaTel Connection ReliaTelTM 230,460,575V 1213-2663 YSC(092-120)H ReliaTel Connection ReliaTelTM 460V and/or 575V 1213-1674 YSC(036-060)G4 ReliaTel Controls Connection ReliaTelTM 460V and/or 575V 1213-1676 YSC(036-060)GW ReliaTel Controls Connection ReliaTelTM 460V and/or 575V 4366-8254 YHC120F ReliaTel Controls, with Multi -Zone VAV Connection ReliaTelTM 460V and/or 575V 4366-7341 YHC(037) (460V) Connection ReliaTelTM 460V and/or 575V 4366-8248 YHC037E (460V), 17 Plus with Multi -Zone VAV Connection ReliaTelTM 460V and/or 575V 4366-7343 YHC(047-067) (460V) Connection ReliaTelTM 460V and/or 575V 4366-8250 YHC(047,067)E (460V), 17 Plus with Multi -Zone VAV Connection ReliaTelTM 460V and/or 575V 4366-5202 YHC(036,048)E/F (460V), ReliaTel Controls, X13 IDM Connection ReliaTelTM 460V and/or 575V 4366-1516 Y(S,H)C(036-060)F (460V,575V), ReliaTel Controls, Belt - Drive IDM Connection ReliaTelTM 460V and/or 575V 4366-5203 YHC060E/F (460V), ReliaTel Controls, X13 IDM Connection ReliaTelTM 460V and/or 575V 4366-1540 Y(S,H)C(072,090)F (460V,575V), ReliaTel Controls Connection ReliaTelTM 460V and/or 575V 4366-1532 YSC(092,102)F (460V,575V), ReliaTel Controls Connection ReliaTelTM 460V and/or 575V 4366-7454 (YSC120,YHC074-102)F (460V), ReliaTel Controls Connection ReliaTelTM 460V and/or 575V 4366-8256 YHC(074-102)F, YSC120F (460V), ReliaTel Controls with Multi -Zone VAV Connection ReliaTelTM 460V and/or 575V 4366-7456 YSC120F (575V), ReliaTel Controls Connection ReliaTelTM 460V and/or 575V 4366-8257 YSC120F (575V), ReliaTel Controls with Multi -Zone vAV Connection Electromechanical 230V 1213-1673 YSC(036-060)G3 Electromechanical Controls Connection Electromechanical 230V 4366-8390 Y(S,H)C(036,048)E/F, YHC060F (I -Phase), Electromechanical Controls Connection Electromechanical 230V 4366-8392 YHC(036,048)E/F (230V 3-Phase), Electromechanical Controls, X13 IDM Connection Electromechanical 230V 4366-8404 Y(S,H)C(036-060)E/F (230V 3-Phase), Electromechanical Controls, Belt -Drive IDM Connection Electromechanical 230V 4366-8393 YHC060E/F (230V 3-Phase), Electromechanical Controls, X13 IDM Connection Electromechanical 230V 4366-8408 Y(S,H)C(072,090)F (230V), Electromechanical Controls Connection Electromechanical 230V 4366-8403 YHC120F (3-Phase), Electromechanical Controls Connection Electromechanical 230V 4366-8406 YSC(092,102)F (230V), Electromechanical Controls Connection Electromechanical 230V 4366-8400 (YSC120,YHC074-102)F (230V), Electromechanical Controls 80 RT-SVX21 AB -EN qWTRANE Wiring Diagrams Table 28. Wiring diagram matrix (a) Schematic Type Drawing Number Description Connection Electromechanical 230,460,575V 1213-2660 YSC(072-102)H Electromechanical Connection Electromechanical 230,460,575V 1213-2661 YSC(092-120)H Electromechanical Connection Electromechanical 460V and/or 575V 1213-1675 YSC(036-060)G4 Electromechanical Controls Connection Electromechanical 460V and/or 575V 1213-1677 YSC(036-060)GW Electromechanical Controls Connection Electromechanical 460V and/or 575V 4366-8394 YHC(036,048)E/F (460V), Electromechanical Controls, X13 IDM Connection Electromechanical 460V and/or 575V 4366-8405 Y(S,H)C(036-060)E/F (460V,575V), Electromechanical Controls, Belt -Drive IDM Connection Electromechanical 460V and/or 575V 4366-8399 YHC060E/F (460V), Electromechanical Controls, X13 IDM Connection Electromechanical 460V and/or 575V 4366-8389 Y(S,H)C(072,090)F (460V.575V), Electromechanical Controls Connection Electromechanical 460V and/or 575V 4366-8407 YSC(092,102)F (460V.575V), Electromechanical Controls Connection Electromechanical 460V and/or 575V 4366-8401 (YSC120,YHC074-120)F (460V), Electromechanical Controls Connection Electromechanical 460V and/or 575V 4366-8402 YSC120F (575V), Electromechanical Controls (a) Wiring diagrams can be accessed using e-Library by entering the diagram number in the literature order number search field or by contacting technical support. RT-SVX21 AB-E N 81 0 TRAME' Limited Warranty Combination Gas Electric Air Conditioner YCD, YCH, YSC and YHC (Parts Only) Models Less Than 20 Tons for Commercial Use* This warranty is extended by Trane to the original purchaser and to any succeeding owner of the real property to which the Combination Gas Electric Air Conditioner is originally affixed, and applies to products purchased and retained for use within the U.S.A. and Canada. There is no warranty against corrosion, erosion or deterioration. If any part of your Combination Gas Electric Air Conditioner fails because of manufacturing defectwithin one year from the date of the original purchase, Warrantor will furnish without charge the required replacement part. In addition, if the sealed motor -compressor fails because of a manufacturing defect within the second through fifth year from the date of original purchase, Warrantor will furnish without charge the required replacement compressor. In addition, if the standard aluminized steel heat exchanger fails because of a manufacturing defect within five years from the date of start-up, Warrantor will furnish without charge a replacement heat exchanger. Any local transportation, related service labor and diagnosis calls are not included. In addition, if the optional, factory installed, stainless steel heat exchanger fails because of a manufacturing defect within ten years from the date of start-up, Warrantor will furnish without charge a replacement heat exchanger. Any local transportation, related service labor and diagnosis calls are not included. Warrantor's obligations and liabilities underthis warranty are limited to furnishing F.O.B. Warrantor factory or warehouse at Warrantor designated shipping point, freight allowed to Buyer's city, replacement parts for Warrantor's products covered under this warranty. Warrantor shall not be obligated to pay for the cost of lost refrigerant. No liability shall attach to Warrantor until products have been paid for and then liability shall be limited solely to the purchase price of the equipment under warranty shown to be defective. THE WARRANTYAND LIABILITYSET FORTH HEREIN ARE IN LIEU OF ALL OTHER WARRANTIES AND LIABILITIES, WHETHER IN CONTRACTOR IN NEGLIGENCE, EXPRESS OR IMPLIED, IN LAW OR IN FACT, INCLUDING IMPLIED WARRANTIES OF MERCHANTABILITYAND FITNESS FOR PARTICULAR USE, AND IN NO EVENT SHALL WARRANTOR BE LIABLE FOR ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES. Some states do not allow limitations on how long an implied warranty lasts or do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation or exclusion may not apply to you. This warranty gives you specific legal rights, and you may also have other rights which vary from state to state. Trane 2701 Wilma Rudolph Blvd. Clarksville, TN 37040-1008 Attention: Manager, Product Service GW-606-4800 * This warranty is for commercial usage of said equipment and not applicable when the equipment is used for a residential application. Commercial use is any application where the end purchaser uses the product for other than personal, family or household purposes. **A 5 year limited warranty is provided for the optional "Low Leak" economizer when combined with the additional FDD (Fault Detection and Diagnostics) option. 82 RT-SVX21AB-EN Trane - by Trane Technologies (NYSE: TT), a global climate innovator - creates comfortable, energy efficient indoor environments for commercial and residential applications. For more information, please visit trane.com or tranetechnologies.com. Trane has a policy of continuous product and product data improvement and reserves the right to change design and specifications without notice. We are committed to using environmentally conscious print practices. RT-SVX21AB-EN 31 mar202o Supersedes RT-SVX21AA-EN (Jan 2020) ©2020 Trane TRAiNE® Job Name: . Prepared By:. Unit Tag:YSC060G3EMB00 Quantity: 1 Trane Precedent Gas/Electric Packaged Rooftop Application Unit Size pp y an x ei External "� DX cooling, 5 Ton 060 Airflow Static Height gas heat ) Pressure 2000 cfm 0.500 in H2O 3.41 ft Unit Features -1 Voltage/phase/hertz 208-230/60/3 MCA 28.30 A MOP 40.00 A Timensions (in.) Weight Width Length Minimum Maximum 3.69 ft 5.82 ft 522.0 lb 797.0 lb Controls • Unit Controls Electro mechanical controls 3ph Entering Dry Bulb 80.00 F Capacity Entering Wet Bulb 67.00 F Gross Total 59.98 MBh Ambient Temp 95.00 F Gross Sensible 49.31 MBh Leaving Coil Dry Bulb 57.55 F Net Total 57.75 MBh Leaving Coil Wet Bulb 57.55 F Net Sensible 47.08 MBh Leaving Unit Dry Bulb 59.34 F Fan Motor Heat 2.22 MBh Leaving Unit Wet Bulb 58.24 F Refrig Charge -circuit 1 4.8 lb 006. Refrigeration System Options Leaving Dew Point 57.56 F Heating Stages 2 Output Heating Capacity 81.00 MBh Output Heating Capacity with Fan 83.22 MBh Heating EAT 70.00 F Heating LAT 107.80 F Heating Temp Rise 37.80 F EER IEER/SEER 12.0 EER Indoor Fan Data Outdoor Fan Data Type FC Centrifugal Type Propeller Drive Type Direct Fan Quantity 1 Indoor Fan Performance Drive Type Direct Airflow 2000 cfm Outdoor Fan Performance Design ESP 0.500 in H2O Condenser Fan FLA 0.00 A Indoor Motor Operating Power 0.72 bhp Exhaust Fan Data Indoor Motor Power 0.54 kW Type FC Centrifugal 1 Indoor RPM 1027 rpm Drive Type Direct Indoor Fan FLA 0.00 A Exhaust Fan Performance Exhaust Fan FLA 0.00 A Power 0.00 kW Circuit 1 RLA 0.00 A Circuit 2 RLA 1.40 A Page 1 of 9 TRAINS® Job Name: . Prepared By:. Unit Tag:YSCO6OG3EMBOO Quantity: 1 EVAPORATOR SECTION ACCESS PAN ELF CONDENSATE DRAJN (ALT) 314"-14 NPT DIA. HOLE 4 1 !d' 11d" THROUGH THE EASE CONDENSATE 23 1£1'�{ 4 3119m I I I I I I I 24" 18" I I I N6' 42 r I RETURN SUPPLY 4" a Lis if2 91., L 4' J E W. PLAN VIEW UNIT DIMENSION DRAWING I I I I I I I 24" 18" I I I N6' 42 r I RETURN SUPPLY 4" a Lis if2 91., L 4' J E W. PLAN VIEW UNIT DIMENSION DRAWING 7 RETURN SUPPLY 143I4' 7 23 114" D 4 3f4' 171A' a7fa' 131f4' 33I16' 69 71a' CONDENSATE P PANEL CONDENSER FAN NDENSER COIL _U NIT CONTROL WIRE 718" DIA. HOLE SERVICE GAUGE PORTACCESS 1 3!8"DIA. HOLE OMIT POWER WIRE CDNTRDLANDCOMPRESSORACCESSPANEL —112" NPT GAS CON NECTION NOTES: 1. TH RU -TH E -BASE GASAND ELECTRICAL IS NOT STANDARD ON ALL UNITS. 2.VERIFYWEIGHT, CONNECTION. AND ALL DIMENSION WITH INSTALLER DOCUMENTS BEFORE INSTALLATION 40 PACKAGED GAS / ELECTRICAL DIMENSION DRAWING HORIZONTAL AIR FLOW 2018-04-26 16:58:06Z Page 2 of 9 TRAiNE® Job Name: . Prepared By:. Unit Tag:YSC060G3EMB00 Quantity: 1 314--14 N P T DRAIN CONNECTION SUPPLY RETURN 23 9116"41l4' ISOMETRIC -PACKAGED COOLING 2018-04-26 16:58:06Z Page 3 of 9 TRAIVE® Job Name: . Prepared By:. Unit Tag:YSC060G3EMBOO Quantity: 1 ELECTRICAL 1 GENERAL DATA (2X4)(0) GENERAL HEATING PERFORMANCE Model: YSCO60G Oversized M DtDr HEATING -GENERAL DATA Unit Operating Voltage: 187-253 MCA: NIA Unit PrimaryVultage: 203 MFS: NIA Heating Model: Medium Unit SecondaryVoRage 230 MCB: NIA HeatingModel:Input 6TU): 1odium70,000 U nit H ertz: 60 Heating 0utput(BTU ): 81,000I56,700 U nit P h ase: 3 N a,,. Burners: 3 N o. Stages 2 EE RISE ER 12.0I14.0 Standard M otor Field Installed Oversized M otcr Gas Inlet Pressure MCA 28.2 MCA NIA NaturaIGas (Min/Mbc): 4.5I14.0 MFS: 40.0 MFS: NIA LP CM infMax) 11.0114.0 MCB: 40.0 MCB: NIA Gas Pipe Connection Size: 1= INDOOR MOTOR Standard M otor Oversized Motor Field Installed Oversized M otor Number. 1 Number: NIA Number: NIA Horsepower 1.0 Horsepower. NIA Horsepower: NIA M Dtor Speed (RP M]: — M otor Speed CRP M] NIA M otor Speed (RP M) NIA Phase 1 Phase NIA Phase NIA Full Load Amps: 6.9 Full Load Amps: NIA Full Load Amps: NIA Locked RotorAmps _ LockedRDtorAmps: NIA LockedRotorAmps: NIA COMPRESSOR Circuit 1,2 OUTDOORMOTOR Number: 1 Number: 1 H orse powe r: 4.3 H orsepo wer: 0.40 Ph ase: 3 M DtD r Speed (RP M): 1100 Rated Load Amps: 15.9 Phase: 1 Locked Rotor Am ps: 110.0 Full Load Amps: 1.4 Locked RotorAmps 52 POWER EXHAUSTAGGESSORY ta] FILTERS REFRIGERANT t2) (Field Installed Power E)Khaust] Type Phase: NIA Type: Throwaway Horsepower: NIA Furnished: Yes Factory Charge MDtorSpeed (RPM ): NIA Number 2 Circuit#1 4.3Ib Full Load Amps: NIA Recommended 20'k35-,2" Circuit#2 NIA Lo eked Rotor Am ps: NIA NOTES 1. M aximum (H ACR) Circuit Break or si zing is for installations in the United States only. 2. Refrigerant charge is an approximatevalue. For a more pre cisevalue, see unit nameplate and service instrudion& 3. Value does not in elude P Dwer Exh aust Accessory. 4. Value includes oversized motor. 5. Value does not in elude P Dwer Exh gust Accessory. 6. E E R is rated atAH RI conditions and in accordance with DDE test procedures. 2018-04-26 16:58:06Z Page 4 of 9 TRAINS® Job Name: . Prepared By:. Unit Tag:YSC060G3EMB00 Quantity: 1 PACKAGED GAS 1 ELECTRICAL CORNER WEIGHT INSTALLED ACCESSORIES NET WEIGHT DATA ACCESSORY WEIGHTS ECONOMIZER MOTORIZED OUTSIDE AIR DAMPER MANUAL OUTSIDE AIR DAM PER BAROMETRIC RELIEF OVERSIZED MOTOR BELT DRIVE MOTOR POWER EXHAUST THROUGHT THE BASE ELECTRICALIGAS (FIOPS) UNIT MOUNTED CIRCUIT BREAKER (FIOPS) UNIT MOUNTED DISCONNECT (FIOPS) POWERED CONVENIENCE OUTLET (FIOPS) HINGED DOORS (FIOPS) HAILGUARD SMOKE DETECTOR, SUPPLYI RETURN NOVAR CONTROL STAINLESS STEELHEAT EXCHANGER REHEAT ROOFCURB BASIC UNIT WEIGHTS CORNER WEIGHTS CENTER OFGRAVITIY SHIPPING NET 214.6Ih ;� 52.016 (E}LENGHT (F}WIDTH 627.0lb 522.01b 193.1} IG ; 63.P 16 33" 1l}" OTE: All weightsare apprmmate. Weights far Dptionsthat are not list refertD Installation guide. The actual weight are listed Dn the unit nameplate. RefertD unit nameplate and installation guide for weights 6eforescheduling transportation and installation PACKAGED GAS I ELECTRICAL RIGGING AND CENTER OF GRAVITY iical unit operating weight farthe configuration selected. Estimated nension with installer documants 6eforeinstallation. lion Dnly. ssoriesshDuld be addedtD unit weight when Drdering factory Dr Held 2018-04-26 16:58:06Z Page 5 of 9 TRAINS® Job Name: . Prepared By:. Unit Tag:YSC060G3EMB00 Quantity: 1 CLEARANCE 36" DOWN FLOW CLEARANCE36" H ORIZ ONTAL CLEARAN CE 18" ROOF OPENING UNIT OUTLINE — PACKAGED GASIELECTRIC CLEARAN CE CLEARANCE48" CLEARANCE36" CLEARANCE FROM TOP OF UNIT72' 44 VZ 40' 68 3116" PACKAGED GASIELECTRIC DOWN FLOW TYPICAL ROOF OPEN ING 2018-04-26 16:58:06Z Page 6 of 9 TRAIVL�® Job Name: . Prepared By:. Unit Tag: YSC060G3EMB00 Quantity: 1 General The units shall be convertible airflow. The operating range shall be between 1150F and 0°F in cooling as standard from the factory for units with microprocessor controls. Operating range for units with electromechanical controls shall be between 1150F and 40°F. Cooling performance shall be rated in accordance with ARI testing procedures. All units shall be factory assembled, internally wired, fully charged with R-410A, and 100 percent run tested to check cooling operation, fan and blower rotation, and control sequence before leaving the factory. Wiring internal to the unit shall be colored and numbered for simplified identification. Units shall be cULus listed and labeled, classified in accordance for Central Cooling Air Conditioners. Casing Unit casing shall be constructed of zinc coated, heavy gauge, galvanized steel. Exterior surfaces shall be cleaned, phosphatized, and finished with a weather -resistant baked enamel finish. Unit's surface shall be tested 672 hours in a salt spray test in compliance with ASTM 13117. Cabinet construction shall allow for all maintenance on one side of the unit. Service panels shall have lifting handles and be removed and reinstalled by removing two fasteners while providing a water and air tight seal. All exposed vertical panels and top covers in the indoor air section shall be insulated with a cleanable foil - faced, fire -retardant permanent, odorless glass fiber material. The base of the unit shall be insulated with 1/8 inch, foil -faced, closed -cell insulation. All insulation edges shall be either captured or sealed. The unit's base pan shall have no penetrations within the perimeter of the curb other than the raised 1 1/8 inch high downflow supply/return openings to provide an added water integrity precaution, if the condensate drain backs up. The base of the unit shall have provisions for forklift and crane lifting, with forklift capabilities on three sides of the unit. Unit Top The top cover shall be one piece construction or, where seams exist, it shall be double -hemmed and gasket -sealed. The ribbed top adds extra strength and enhances water removal from unit top. Filters Throwaway filters shall be standard on all units. Optional 2-inch MERV 8 and MERV 13 filters shall also be available. Compressors All units shall have direct -drive, hermetic, scroll type compressors with centrifugal type oil pumps. Motor shall be suction gas-cooled and shall have a voltage utilization range of plus or minus 10 percent of unit nameplate voltage. Internal overloads shall be provided with the scroll compressors. Dual compressors are outstanding for humidity control, light load cooling conditions and system back- up applications. Dual compressors are available on 7'/2-10 ton models and allow for efficient cooling utilizing 3-stages of compressor operation for all high efficiency models. Indoor Fan The following units shall be equipped with a direct drive plenum fan design (T/YSC120F,T/YHC074F, T/YHC092F,T/YHC102F, 120F). Plenum fan design shall include a backward -curved fan wheel along with an external rotor direct drive variable speed indoor motor. All plenum fan designs will have a variable speed adjustment potentiometer located in the control box. 3 to 5 ton units (high efficiency 3-phase with optional motor) are belt driven, FC centrifugal fans with adjustable motor sheaves. 3 to 5 ton units (standard and high efficiency 3-phase) have multispeed, direct drive motors. All 6 to 8'/2 ton units (standard efficiency) shall have belt drive motors with an adjustable idler -arm assembly for quick -adjustment to fan belts and motor sheaves. All motors shall be thermally protected. All 10 tons, 6 ton (074), 7'/2 to 81/2 (high efficiency) units have variable speed direct drive motors. All indoor fan motors meet the U.S. Energy Policy Act of 1992 (EPACT). 2018-04-26 16:58:06Z Page 7 of 9 Job Name: . Prepared By:. Unit Tag: YSC060G8EMB00 Quantity: 1 Outdoor Fans The outdoor fan shall be direct -drive, statically and dynamically balanced, draw -through in the vertical discharge position. The fan motor shall be permanently lubricated and shall have built-in thermal overload protection. Evaporator and Condenser Coils Internally finned, 5/16" copper tubes mechanically bonded to a configured aluminum plate fin shall be standard. Evaporator coils are standard for all 3 to 10 ton standard efficiency models. Microchannel condenser coils are standard for all 3 to 10 ton standard efficiency models and 4, 5, 6, 7.5, 8.5 ton high efficiency models. The microchannel type condenser coil is not offered on the 4 and 5 ton dehumidification model. Due to flat streamlined tubes with small ports, and metallurgical tube -to -fin bond, microchannel coil has better heat transfer performance. Microchannel condenser coil can reduce system refrigerant charge by up to 50% because of smaller internal volume, which leads to better compressor reliability. Compact all -aluminum microchannel coils also help to reduce the unit weight. These all aluminum coils are recyclable. Galvanic corrosion is also minimized due to all aluminum construction. Strong aluminum brazed structure provides better fin protection. In addition, flat streamlined tubes also make microchannel coils more dust resistant and easier to clean. Coils shall be leak tested at the factory to ensure the pressure integrity. The evaporator coil and condenser coil shall be leak tested to 600 psig. The assembled unit shall be leak tested to 465 psig. The condenser coil shall have a patent pending 1+1+1 hybrid coil designed with slight gaps for ease of cleaning. A plastic, dual -sloped, removable and reversible condensate drain pan with through -the -base condensate drain is standard. Controls Unit shall be completely factory -wired with necessary controls and contactor pressure lugs or terminal block for power wiring. Unit shall provide an external location for mounting a fused disconnect device. A choice of microprocessor or electromechanical controls shall be available. Microprocessor controls provide for all 24V control functions. The resident control algorithms shall make all heating, cooling, and/or ventilating decisions in response to electronic signals from sensors measuring indoor and outdoor temperatures. The control algorithm maintains accurate temperature control, minimizes drift from set point, and provides better building comfort. A centralized microprocessor shall provide anti - short cycle timing and time delay between compressors to provide a higher level of machine protection. 24-volt electromechanical control circuit shall include control transformer and contactor High Pressure Control All units include High Pressure Cutout as standard. Phase monitor Phase monitor shall provide 100% protection for motors and compressors against problems caused by phase loss, phase imbalance, and phase reversal. Phase monitor is equipped with an LED that provides an ON or FAULT indicator. There are no field adjustments. The module will automatically reset from a fault condition. Refrigerant Circuits Each refrigerant circuit offer thermal expansion refrigerant line filter driers are factory -installed as suction line driers. valve as standard. Service pressure ports, and standard. An area shall be provided for replacement 2018-04-26 16:58:06Z Page 8 of 9 TRAME® Job Name: . Prepared By:. Unit Tag:YSC060G3EM600 Quantity: 1 Gas Heating Section The heating section shall have a progressive tubular heat exchanger design using stainless steel burners and corrosion resistant steel throughout. An induced draft combustion blower shall be used to pull the combustion products through the firing tubes. The heater shall use a direct spark ignition (DSI) system. On initial call for heat, the combustion blower shall purge the heat exchanger for 20 seconds before ignition After three unsuccessful ignition attempts, the entire heating system shall be locked out until manually reset at the thermostat/zone sensor. Units shall be suitable for use with natural gas or propane (field -installed kit) and also comply with the California requirement for low NOx emissions (Gas/Electric Only). 2018-04-26 16:58:06Z Page 9 of 9