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BLD2021-1182_Manufacturer_Specifications_and_Installation_Instructions_8.25.2021_1.30.37_PM_237592116 rR�E� 18-AC110D1-1A-EN Installer m guide Condensing Units 4TTR3043A1000N 4TTR3049A1000N ALL phases of this installation must comply with NATIONAL, STATE AND LOCAL CODES IMPORTANT —This Document is customer property and is to remain with this unit. Please return to service informa- tion pack upon completion of work. These instructions do not cover all variations in systems or provide for every possible contingency to be met in connection with the installation. Should further information be desired or should particular problems arise which are not covered sufficiently for the purchaser's purposes, the matter should be referred to your installing dealer or local distributor. Note: The manufacturer recommends installing only approved matched indoor and outdoor systems. All of the manufacture's split systems are A.H.R.I. rated only with TXV/EEV indoor systems. Some of the benefits of installing approved matched indoor and outdoor split systems are maximum efficiency, optimum performance and the best overall system reliability. Table of Contents Section1. Safety.....................................................................................2 Section 2. Unit Location Considerations..............................................3 Section 3. Unit Preparation....................................................................5 Section 4. Setting the Unit.....................................................................5 Section 5. Refrigerant Line Considerations.........................................5 Section 6. Refrigerant Line Routing.....................................................6 Section 7. Refrigerant Line Brazing......................................................7 Section 8. Refrigerant Line Leak Check...............................................9 Section 9. Evacuation...........................................................................10 Section 10. Service Valves...................................................................11 Section 11. Electrical - Low Voltage....................................................11 Section 12. Electrical - High Voltage...................................................13 Section 13. Start Up..............................................................................14 Section 14. System Charge Adjustment.............................................15 Section 15. Checkout Procedures and Troubleshooting ...................19 Section 16. Refrigerant Circuits.......................................................... 22 Section 1. Safety This information is intended for use by individuals possessing adequate backgrounds of electrical and mechanical experience. Any attempt to repair a central air conditioning product may result in personal injury and/or property damage. The manufacture or seller cannot be responsible for the interpretation of this information, nor can it assume any liability in connec- tion with its use. These units use R-410A refrigerant which operates at 50 to 70% higher pressures than R-22. Use only R-410A approved service equipment. Refrigerant cylinders are painted a "Rose" color to indicate the type of refrigerant and may contain a "dip" tube to allow for charging of liquid refrigerant into the sys- tem. All R-410A systems use a POE oil that readily absorbs moisture from the atmosphere. To limit this "hygroscopic" action, the system should remain sealed whenever possible. If a system has been open to the atmosphere for more than 4 hours, the compressor oil must be replaced. Never break a vacuum with air and always change the driers when opening the system for component replacement. For specific handling concerns with R-410A and POE oil reference Retrofit Bulletins SS-APG006-EN and APP-APG011-EN or APP-APG012-EN. UNIT CONTAINS R-410A REFRIGERANT! R-410A operating pressures exceed the limit of R-22. Proper service equipment is required. Failure to use proper service tools may result in equipment damage or personal injury. SERVICE USE ONLY R-410A REFRIGERANT AND AP- PROVED POE COMPRESSOR OIL. Extreme caution should be exercised when opening the Liquid Line Service Valve. Turn counterclockwise until the valve stem just touches the rolled edge. No torque is required. Failure to follow this warning will result in abrupt release of system charge and may result in personal injury and /or property damage. LIVE ELECTRICAL COMPONENTS! During installation, testing, servicing, and trouble- shooting of this product, it may be necessary to work with live electrical components. Failure to follow all electrical safety precautions when exposed to live electrical components could result in death or serious injury. If using existing refrigerant lines make certain that all joints are brazed, not soldered. wFill 1111 =11 Scroll compressor dome temperatures may be hot. Do not touch the top of compressor; it may cause minor to severe burning. 18-AC1 10D1-1A-EN Section 2. Unit Location Considerations 2.1 Unit Dimensions and Weight Table 2.1 Unit Dimensions and Weight Models H x D x W (in) Weight* (Ib) 4TTR3043A1 29 x 34 x 37 184 4TTR3049A1 29 x 34 x 37 189 Weight values are estimated. When mounting the outdoor unit on a roof, be sure the roof will support the unit's weight. Properly selected isolation is recommended to alleviate sound or vibration transmission to the building structure. 2.2 Refrigerant Piping Limits 1. The maximum length of refrigerant lines from outdoor to indoor unit should NOT exceed sixty (60) feet. 2. The maximum vertical change should not exceed sixty (60) feet. 3. Service valve connection diameters are shown in Table 5.1. Note: For line lengths greater than sixty (60) feet, Refer to Refrigerant Piping Application Guide, SS-APGO06-EN or Refrigerant Piping Software Program, 32-3312-03 (or latest revi- sion). Standard Line Set 60' Max Line Length t 60' Max Vertical Change. 18-AC110D1-1A-EN 3 2.3 Suggested Locations for Best Reliability Ensure the top discharge area is unrestricted for at least five (5) feet above the unit. Three (3) feet clearance must be provided in front of the control box (access panels) and any other side requiring service. Do not locate close to bedrooms as operational sounds may be objectionable. Position the outdoor unit a minimum of 12" from any wall or surrounding shrubbery to ensure adequate airflow. Outdoor unit location must be far enough away from any structure to prevent excess roof runoff water from pouring directly on the unit. 2.4 Coastal Considerations 53r Bedrooms Min 5' Unrestricted Min T 1211t. Unrestricted bbery,.— Access Panel „14 If installed within one mile of salt water, including seacoasts and inland waterways, models without factory sup- plied Seacoast Salt Shields require the addition of BAYSEAC001 (Seacoast Kit) at installation time. Section 3. Unit Preparation 3.1 Prepare The Unit For Installation STEP 1 - Check for damage and report prompt- ly to the carrier any damage found to the unit. STEP 2 - To remove the unit from the pallet, remove tabs by cutting with a sharp tool. REMOVE TABS AS SHOWN 4 18-AC1 10D1-1A-EN Section 4. Setting the Unit 4.1 Pad Installation When installing the unit on a support pad, such as a concrete slab, consider the following: • The pad should be at least 1" larger than the unit on all sides. • The pad must be separate from any structure. • The pad must be level. • The pad should be high enough above grade to allow for drainage. • The pad location must comply with National, State, and Local codes. Section 5. Refrigerant Line Considerations 5.1 Refrigerant Line and Service Valve Connection Sizes Table 5.1 Line Sizes Service Valve Connection Sizes Model Vapor Line Liquid Line Vapor Line Connection Liquid Line Connection 4TTR3043A1 7/8 3/8 7/8 3/8 4TTR3049A1 7/8 3/8 7/8 3/8 5.2 Factory Charge Trane outdoor condensing units are factory charged with the system charge required for the outdoor condensing unit, fifteen (15) feet of tested connecting line, and the smallest indoor evaporative coil match. If connecting line length exceeds fifteen (15) feet and/or a larger indoor evaporative coil is installed, then final refrigerant charge adjustment is necessary. See table for line length adders. 5.3 Required Refrigerant Line Length Determine required line length and lift. You will need this later in STEP 2 of Section 14. Total Line Length = Ft. Total Vertical Change (lift) = Ft. TUBING INFORMATION REFRIGERANT TO ADD AT SPECIFIED LINE TYPE ADDITIONAL LENGTH Suction Liquid Line Line 20 ft 30 ft 40 ft 50 ft 60 ft 3/4" 3/8" 3 oz 9 oz 15 oz 21 oz 27 oz 7/8" 3/8" 3 oz 9 oz 16 oz 22 oz 28 oz 18-AC110D1-1A-EN 5 5.4 Refrigerant Line Insulation Important: The Vapor Line must always be insulated. DO NOT allow the Liquid Line and Vapor Line to come in direct (metal to metal) contact. 5.5 Reuse Existing Refrigerant Lines If using existing refrigerant lines make certain that all joints are brazed, not soldered. For retrofit applications, where the existing indoor evaporator coil and/or refrigerant lines will be used, the following precautions should be taken: • Ensure that the indoor evaporator coil and refrigerant lines are the correct size. • Ensure that the refrigerant lines are free of leaks, acid, and oil. Important: For more information see publica- tion number SS-APG006-EN. Section 6. Refrigerant Line Routing 6.1 Precautions Liquid Line Vapor Line Insulation Important: Take precautions to prevent noise Comply with National, State, and Local Codes when within the building structure due to vibration isolating line sets from joists, rafters, walls, or other transmission from the refrigerant lines. structural elements. For Example: • When the refrigerant lines have to be fastened to floor joists or other framing in a structure, use isolation type hangers. • Isolation hangers should also be used when refrigerant lines are run in stud spaces or enclosed ceilings. • Where the refrigerant lines run through a wall or sill, they should be insulated and isolated. • Isolate the lines from all ductwork. • Minimize the number of 90' turns. 8 Feet Maximum / Joist/Rafter 0 0 0 0 0 0 Isolator 0 0 0 0 0 0 0 0 0 O1 1010 Side View I 8 Feet Maximum Line Set Secure Vapor line from joists using isolators every 8 ft. Secure Liquid Line directly to Vapor line using tape, wire, or other appro- priate method every 8 ft. Isolation From Joist/Rafter 18-AC1 10D1-1A-EN 8 Feet Maximum O Side View Isolation Through Wall Wall Isolator u I Line Set 8 Feet Maximum Secure Vapor Line using isolators every 8 ft. Secure Liquid Line directly to Vapor Line using tape, wire, or other appropriate method every 8 ft. Isolation In Wall Spaces lation vapor Line Section 7. Refrigerant Line Brazing 7.1 Braze The Refrigerant Lines STEP 1 - Remove caps or plugs. Use a debur- ing tool to debur the pipe ends. Clean both internal and external surfaces of the tubing using an emery cloth. DO NOT hang line sets from ductwork 18-AC110D1-1A-EN 7 STEP 2 - Remove the pressure tap cap and valve cores from both service valves. STEP 3 - Purge the refrigerant lines and indoor coil with dry nitrogen. STEP 4 - Wrap a wet rag around the valve body to avoid heat damage and continue the dry nitro- gen purge. Braze the refrigerant lines to the service valves. For units shipped with a field -installed external drier, check liquid line filter drier's directional flow arrow to confirm correct direction of refrigeration flow (away from outdoor unit and toward evapo- rator coil) as illustrated. Braze the filter drier to the Liquid Line. Continue the dry nitrogen purge. Do not remove the wet rag until all brazing is completed. Important: Remove the wet rag before stopping the dry nitrogen purge. Note: Install drier in Liquid Line. NCKME. Precautions should be taken to avoid heat damage to basepan during brazing. It is recommended to keep the flame directly off of the basepan. o 3-4"from valve e e e e, 18-AC110D1-1 A -EN STEP 5 - Replace the pressure tap valve cores after the service valves have cooled. Section 8. Refrigerant Line Leak Check 8.1 Check For Leaks STEP 1 - Pressurize the refrigerant lines and evaporator coil to 150 PSIG using dry nitrogen. STEP 2 - Check for leaks by using a soapy solu- tion or bubbles at each brazed location. Remove nitrogren pressure and repair any leaks before continuing. 150 PSIG 18-AC110D1-1A-EN 9 Section 9. Evacuation 9.1 Evacuate the Refrigerant Lines and Indoor Coil Important. Do not open the service valves until the refrigerant lines and indoor coil leak check and evacuation are complete. STEP 1 - Evacuate until the micron gauge reads no higher than 350 microns, then close off the valve to the vacuum pump. STEP 2 - Observe the micron gauge. Evacuation is complete if the micron gauge does not rise above 500 microns in one (1) minute. Once evacuation is complete blank off the vacuum pump and micron gauge, and close the valves on the manifold gauge set. Section 10. Service Valves 10.1 Open the Gas Service Valve Important: Leak check and evacuation must be completed before opening the service valves. NOTE: Do not vent refrigerant gases into the atmosphere STEP 1 - Remove valve stem cap. STEP 2 - Using an adjustable wrench, turn valve stem 1/4 turn counterclockwise to the fully open position. STEP 3 - Replace the valve stem cap to prevent leaks. Tighten finger tight plus an additional 1/6 turn. 0350 Microns 0 ON OFF 1 MIN. 1/4 TURN ONLY CAP COUNTERCLOCKWISE FOR FULL OPEN POSITION �— VALVE STEM UNIT SIDE OF VALVE PRESSURE TAP PORT GAS LINE CONNECTION 10 18-AC110D1-1 A -EN 10.2 Open the Liquid Service Valve Extreme caution should be exercised when opening the Liquid Line Service Valve. Turn counterclockwise until the valve stem just touches the rolled edge. No torque is required. Failure to follow this warning will result in abrupt release of system charge and may result in personal injury and /or property damage. Important. Leak check and evacuation must be completed before opening the service valves. STEP 1 - Remove service valve cap. STEP 2 - Fully insert 3/16" hex wrench into the stem and back out counterclockwise until valve stem just touches the rolled edge (approximately five (5) turns.) STEP 3 - Replace the valve cap to prevent leaks. Tighten finger tight plus an additional 1/6 turn. Section 11. Electrical - Low Voltage 11.1 Low Voltage Maximum Wire Length Table 11.1 defines the maximum total length of low voltage wiring from the outdoor unit, to the indoor unit, and to the thermostat. Capes 9 Unit Side /3/16" Hex Wrench of Service Valve Rolled Edge to Il Captivate Stem /Hex Headed Valve System Service Port Table 11.1 24 VOLTS WIRE SIZE MAX. WIRE LENGTH 18 AWG 150 Ft. 16 AWG 225 Ft. 14 AWG 300 Ft. 18-AC110D1-1A-EN 11 11.2 Low Voltage Hook-up Diagrams With TEM 3, 4, 6 Outdoor Thermostat Air Handler Unit 24 VAC HOT i FAN G G i i i 24 VAC B/C B i B Common Blue i SOV Fi ol. i LIRE T Y Y1I-E] It Y2* With TAM 4, 7 Thermostat Air Handler Outdoor Unit 24 VAC HOT R R FAN G G 24 VAC B/C B B Common Blue SOV E COOL/HEAT 1st STAGE YI YI Yp Yp HEATING HEATING 2nd STAGE V V 1 V V 1 2nd STAGE W 1 V V 1 White White HEAT EMERGENCY `^'� - - - - wPink 2 HEAT EMERGENCY - - - - `^'2 V V V V FVPiink BK ---- FBK1 BK --- BK WH/BL WH/BL WH/BL WH/BL • Units with pigtails require wirenuts for connections. Cap all unused wires. • In AC systems for multiple stages of electric heat, jumper W1 and W2 together if comfort control has only one stage of heat. • TEM3/4 - Bypass air handler and connect Y from comfort control directly to OD unit * TEM6 Only ** TEM6 only - When using a BK enabled comfort control, cut BK jumper and bypass Y1 and Y2 at the air handler. Connect BK from comfort control to BK of the air handler • TAM4 only - Wire as shown, no BK is available • TAM7 nnly - Whan iminn A RV anAhlari rnmfnrf rnntrnl riff RV iiimnar nn fha AFC And rnnnarf RV frnm rnmfnrf rnntrnl fn RK of fha .Air hanrilPr 12 18-AC1101D1-1 A -EN «.Q««��Q�Q�Q�Q�� lllll�:I�l�l�l�l�l�l�lCl(ll(l2llllllll(lllllll�lll 111111�j�pl�l�l�lOIOIO/�l�l�lQl(/l�l�101101011 l�l�T(� I�l111111(ll(ll(ll(II(Illll(l//C/!///C//C/((//l//ll( I(II(IIPIPIPIPI(IIIIIIIIIlI(IT((((/I(O(O(ll U O cz L CD O j O Cl 2� c� U "" O O C O_ N O N N (o .E U Cn O) (o p 0-- cz � C Co � •O E U >, 'z O O cz N Z U,_r ca2.` 8 O co O_0 Z` U w U y E O) U O N _U O L O_ �i _ U _ Q cn CL a) O O OU O E Q C ,, U.o ° 3 o� o cz in N L U rr (o i O x O O) - E O U cz o� o � 5 O O �� O O-a i 0 0 U J O O t 00 O E S U C LL W U L .Q C 3 O U W .E cz O cn O O O O O O �-0 L LL :_ C iL cz LL O Cn �s is g0 _afi Z. a Q N N ao a) a1 t T 2 N T ` co� O N cOn N cz U C O a) CO C U C U 70 ooE�i N c U C � C cz U cz c O C N •J .U-•� C � cr a, 0 0 -0 O O � O UO C.'j — M Section 13. Start Up 13.1 System Start Up STEP 1 - Ensure Sections 7 through 12 have been completed. STEP 2 - Set System Thermostat to OFF. STEP 3 - Turn on disconnect(s) to apply power to the indoor and outdoor units. STEP 4 - Wait one (1) hour before starting the unit if compressor crankcase heater acces- sory is used and the Outdoor Ambient is below 70O F. 60 MIN. STEP 5 - Set system thermostat to ON. 14 18-AC1 10D1-1A-EN Section 14. System Charge Adjustment 14.1 Temperature Measurements STEP 1 - Check the outdoor temperatures. Subcooling (in cooling mode) is the only recom- mended method of charging above 55' F ambi- ent outdoor temperature. For best results the indoor temperature should be kept between 700 F to 80' F. Note: It is important to return in the spring or summer to accurately charge the system in the cooling mode when outdoor ambient tempera- ture is above 550 F. 14.2 Subcooling Charging in Cooling (Above 550 F Outdoor Temp.) STEP 1 - Use the refrigerant line total length and lift measurements from Section 5 and use line length adders as shown in Section 5.2 if required. Total Line Length = Ft. Vertical Change (Lift) = Ft. X 1200 F J 550 F X Outdoor Temp X 800 F J 700 F X Indoor Temp 18-AC110D1-1A-EN 15 STEP 2 - Determine the final subcooling value using total Line Length and Lift measured in STEP 1 and the charts below. 3 1 /2 Ton SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE) w 60 Add 6- w 50 Add 5° LE 40 Add 3° of Subcooling 30 Add 2° of Subcooling 25 Add 1 ° of Subcooling z 20 5 w Use Desi n Su bcool Value c7 10 9 FF w p oC 10 20 25 30 40 60 TOTAL REFRIGERANT LINE LENGTH (FEET) 4 Ton SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE) 60 w 50 Add 6° 40 Add 4° of Subcooling 30 Add 3" of Subcooling 25 � Add 2' of Subcooling ¢ 20 Add 1 o of Subcooling � 15 w pF 1001 Use Design Subcool Value w � 10 20 25 30 40 60 TOTAL REFRIGERANT LINE LENGTH (FEET) STEP 3 - Stabilize the system by operating for a minimum of 20 minutes. At startup, or whenever charge is removed or added, the system must be operated for a mini- mum of 20 minutes to stabilize before accurate measurements can be made. STEP 4 - Measure the liquid line temperature and pressure at the outdoor unit's service valve. Measured Liquid Line Temp = ° F Liquid Gage Pressure = PSI Design Subcooling Value = ° F (from nameplate or Service Facts) Subcooling Correction = ° F Final Subcooling Value = ° F Of 20 MIN. 16 18-AC1101D1-1 A -EN STEP 5 - Use the final subcooling vale ant temperature and pressure from S- determine the proper liquid gage pres Table 14.2. Example: Assume a 12' F Final Su value and liquid temp of 90' F. 1. Locate 12' F Final Subcooling in 2. Locate the Liquid Temperarature the left column. 3. The Liquid Gage Pressure shoul proximately 327 PSI. (This is the s the intersection of the Final Subcoc and the Liquid Temperature row. STEP 6 - Adjust refrigerant level to attain proper gage pressure. Add refrigerant if the Liquid Gage Pressure is lower than the chart value. 1. Connect gages to refrigerant bottle and unit as illustrated. 2. Purge all hoses. 3. Open bottle. 4. Stop adding refrigerant when liquid line temperature and Liquid Gage Pressure matches the charging chart Final Subcooling value. Recover refrigerant if the Liquid Gage Pres- sure is higher than the chart value. P 7 - Stabilize the system. 1. Wait 20 minutes for the system condi- tion to stabilize between adjustments. Note: When the Liquid Line Temperature and Gage Pressure approximately match the chart, the system is properly charged. 2. Remove gages. 3. Replace service port caps to prevent leaks. Tighten finger tight plus an ad- ditional 1/6 turn. 20 MIN. 18-AC110D1-1 A -EN 17 STEP 8 - Verify typical performance. Refer to System Pressure Tables to verify typical performance. STEP 9 - Record System Information for refer- ence. Record system pressures and temperatures after charging is complete. (Example only - see Pressure Tables) �oommmmml mI mm m� gym®®gym®mm mm®®gym®mm Outdoor model number = Measured Suction Line Temp = Measured Outdoor Ambient = ° F Liquid Gage Pressure = Measured Indoor Ambient = ° F Suction Gage Pressure = Measured Liquid Line Temp = ° F Section 15. Checkout Procedures and Troubleshooting 15.1 Operational And Checkout Procedures ZRI ZN °F Final phases of this installation are the unit Operational and Checkout Procedures. To obtain proper performance, all units must be operated and charge adjustments made. Important. Perform a final unit inspection to be sure that factory tubing has not shifted during shipment. Adjust tubing if nec- essary so tubes do not rub against each other when the unit runs. Also be sure that wiring connections are tight and properly secured. CHECKOUT PROCEDURE After installation has been completed, it is recommended that the entire system be checked against the following list: 1. Leak check refrigerant lines ......................................... [ ] 7. Be sure that indoor coil drain line drains freely. Pour water 2. Properly insulate suction lines and fittings .................... [ ] into drain pan ................................................................ [ ] 3. Properly secure and isolate all refrigerant lines............ [ ] 8. Be sure that supply registers and return grilles are open and unobstructed.......................................................... [ l 4. Seal passages through masonry. If mortar is used, prevent mortar from coming 9• Be sure that a return air filter is installed ...................... [ ] into direct contact with copper tubing ........................... [ ] 10. Be sure that the correct airflow setting is used. 5. Verify that all electrical connections are tight ................ [ ] (Indoor blower motor) ................................................... [ ] 6. Observe outdoor fan during on cycle for clearance 11. Operate complete system in each mode to and smooth operation ................................................... [ ] ensure safe operation................................................... [ l 18 18-AC110D1-1 A-E� 15.2 Troubleshooting Compressor fails to start Contactor check Is contactor YES energized? contacts closed NO Check for 24 volts AC across contactor coil Is voltage present at NO Check control transformer and control fuse s the contro transformer 717 Repair or replace transformer or fuse. Investigate cause for failure (possible short in field wiring) OUT HIGH VOLTAGE YES TROUBLESHOOTING Go To: Compressor won't run Replace contactor YES Jumper R to Y low voltage terminals at thermostat sub base. Single Pole Contactor (MS)* TP T1 :)ntactor Cc 24 VAC Does the YES Replace the room contactor thermostat energize? NO Repair or replace connecting wiring Double Pole Contactor (MS)* TO T1 IN L24-' +�-JL1 L2 L+4---A-P L1 *Refer to Wiring Diagram to determine if a single pole or double pole contactor is used. 18-AC110D1-1 A -EN OUT HIGH VO LTAG E IN 19 TROUBLESHOOTING Compressor won't run Contactor is closed Check for high voltage to contactor z Check for open IOL high voltage present YES (Internal Overload) YN'OCheck for open windings. at T1 and T2 ? Check resistance of CtoSandCtoR NO Does theCheck poweresistance checYESAllow compressor supply fromshow an open time to cool and disconnect and/or ircuitfromCto re -test breaker panel. or C to ? oes a resistance chec YES Replace the show an open circuitbetween R and S? compressor NO Check for locked rotor �Itage pre nt Check Start - at C to Sand C YES Capacitor and to R with locked 10 Relay (if present) o rampso ? and Run Capacitor NO Check wiring to o the sta compressor components andC, Sand R run capacitor/ Replace start components and/ or run capacitor YES Replace the compressor 20 18-AC110D1-1A-EN SYE REFRIGERANT CIRCUIT Head Pressure Too High ■■■■■■■■■■■■■■■■■■■0©■■■©■■■■■ Head Pressure Too Low ■■■■■■■■■■■■■■©0■■■■■©©■©©©■■■ Suction Pressure Too High 0■■■■■■■■■■■■■©■00■■■■©■■0■0■■ Suction Pressure Too Low 0■■■■■■■■■■■■■■0■■■■■■©0©■©■■■ 0■■■■■■■■■■■■■■■■■■■■0■■■■■■■■ 0■■■■■■■■■■■■■■■0■■©©■©0■■■■■■ ©■■■■■■■■■■■■■■■0■■©©■©■■■©■■■ I.D. Coil Frosting 0■■■■■■■■■■■■■■0■■■©©■■■■■■■■■ Compressor Runs Inadequate or No Cooling/Htg 0■■■■■■■■■■■■■©0■©©■■■©0©©©©■■ ©■■■■■■■■■■■■■©0■■©■■■©0©©■©■■Unit Won't Initiate Defrost c - cooing H - Heating N - Primary causes 5 - Secondary causes * - 3 vnase Umy 16.0 Refrigerant Circuits 3 1/2 & 4-Ton Units FIELD INSTALLED INTER -CONNECTING TUBING I� INDOOR SECTION I I I I I I REFRIGERANT FLOW I FIELD - CONNECTION I I I I I INDOOR COIL I I I I CHECK VALVE E;D I I DRIER EXPANSION VALVE f TXV/EEV) I F I E L CONNECTION OUTDOOR SECTION 1/4 FLARE PRESSURE TAP SUCTION LINE �LPCO LACOMPRESSOR I/A FLARE DISCHARGE PRESSURE L I NE TAP OUTDOOR COIL \ -eft- FLOW `LIQUID LINE PRINTED FROM D158514POl 18-AC110D1-1 A -EN 21 TJMWv 6200 Troup Highway Tyler, TX 75707 www.trane.com 22 OTUS 9TE Intertek The manufacturer has a policy of continuous product and product data improvement and it reserves the right to change design and specifications without notice. Representative -only illustrations included in this document. © 2017 Trane U.S.,Inc. 01 /17 18-AC110D1-1 A -EN