Loading...
The URL can be used to link to this page
Your browser does not support the video tag.
3.5 ton manual copy copy
88-A4AC4001-1 A -EN Installer's guide Condensing Units 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 AHRI rated with Piston/TXWEEV 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. Models A4AC4018A1000A A4AC4023A1000A A4AC4024A1000A A4AC4030A1000A A4AC4036A1000A A4AC4042A1000A A4AC4048A1000A A4AC4060A1000A 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 train- ing. Improperly installed, adjusted or altered equipment by an unqualified person could result in death or serious in- jury. When working on the equipment, observe all precautions in the literature and on the tags, stickers, and labels that are attached to the equipment. 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. Scroll compressor dome temperatures may be hot. Do not touch the top of compressor; it may cause minor to severe burning. WARNING! This product can expose you to chemicals including lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov 88-A4AC4001-1 A -EN Table of Contents Section1. Safety............................................................................................................................................................ 2 Section 2. Unit Location Considerations.................................................................................................................... 4 Section3. Unit Preparation........................................................................................................................................... 5 Section4. Setting the Unit............................................................................................................................................ 6 Section 5. Refrigerant Line Considerations................................................................................................................ 6 Section6. Refrigerant Line Routing............................................................................................................................ 8 Section 7. Refrigerant Line Brazing............................................................................................................................. 9 Section 8. Refrigerant Line Leak Check.....................................................................................................................11 Section9. Evacuation..................................................................................................................................................11 Section10. Service Valves.......................................................................................................................................... 12 Section11. Electrical - Low Voltage........................................................................................................................... 13 Section12. Electrical - High Voltage.......................................................................................................................... 14 Section13. Start Up.....................................................................................................................................................15 Section 14. System Charge Adjustment (Systems can be rated with TXV, EEV or Piston) .................................. 16 Section 15. Checkout Procedures and Troubleshooting......................................................................................... 21 Section16. Refrigerant Circuits................................................................................................................................. 24 88-A4AC4001-1 A -EN 3 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' (lb) A4AC4018A 28.6 x 23.6 x 23.6 130 A4AC4023A 32.6 x 23.6 x 23.6 130 A4AC4024A 28.6 x 25.6 x 25.6 134 A4AC4030A 28.6 x 29.8 x 29.8 160 A4AC4036A 32.6 x 29.8 x 29.8 161 A4AC4042A 28.6 x 34.3 x 34.3 159 A4AC4048A 28.6 x 34.3 x 34.3 159 A4AC4060A 36.6 x 34.3 x 34.3 220 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-APG006-EN or Refrigerant Piping Software Program, 32-3312-03 (or latest revi- sion). Standard Line Set 60' Max Line Length IIIIIIIII III -�=�" IIIIIIIII III !i �I,I,I�I� III VerticaIIIIII IIII IMax I jljljljlj jl� L;hange -- - it 4 88-A4AC4001-1 A -EN 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. 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. Avoid Install Near Bedrooms Min 5Unrestricted Min 3' Min. 12" to _ Unrestricted —'I Shrubbery I_ Access Panel � 0000°o°oo 000000000 nIPh�YfIIPi rMrnMM+ntwaJandxaMPidxJMndxu,y�M-i�wiu�nelwi 88-A4AC4001-1 A -EN 5 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 A4AC4018A 3/4 3/8 3/4 3/8 A4AC4023A 3/4 3/8 3/4 3/8 A4AC4024A 3/4 3/8 3/4 3/8 A4AC4030A 3/4 3/8 3/4 3/8 A4AC4036A 3/4 3/8 3/4 3/8 A4AC4042A 7/8 3/8 7/8 3/8 A4AC4048A 7/8 1 3/8 7/8 1 3/8 A4AC4060A 7/8 1 3/8 7/8 3/8 5.2 Factory Charge The 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. 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" 3/8-1 3 oz 9 oz 16 oz 22 oz 28 oz 88-A4AC4001-1 A -EN 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. 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. Liquid Line Vapor Line Insulation 88-A4AC4001-1 A -EN 7 Section 6. Refrigerant Line Routing 6.1 Precautions 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 902 turns. 8 Feet Maximum Joist/Rafter 0 0 0 0 Isolator 0 0 0 0 0 0 0 0 0 0 0 O 0 0 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 8 Feet Maximum / Wall 0 0 0 0 0 0 0 0 0 0 Isolator 0 0 0 0 0 0 O o 0 I I Line Set Side View 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 88-A4AC4001-1 A -EN lation vapor Line Isolation Through Wall 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. STEP 2 - Remove the pressure tap cap and valve cores from both service valves. DO NOT hang line sets from ductwork 88-A4AC4001-1 A -EN 9 STEP 3 - Purge the refrigerant lines and indoor coil with dry nitrogen. s 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. 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. NOTE: Precautions should be taken to avoid heat damage to basepan during brazing. It is recommended to keep the flame directly off of the basepan. STEP 5 - Replace the pressure tap valve cores after the service valves have cooled. 10 88-A4AC4001-1 A -EN 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. 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. 150 PSIG 0350 Microns 0 ON OFF 88-A4AC4001-1 A -EN 11 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. 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. 1 MIN. 1/4 TURN ONLY CAP COUNTERCLOCKWISE FOR FULL OPEN POSITION �— VALVE STEM UNIT SIDE OF VALVE PRESSURE TAP PORT It GAS LINE CONNECTION Capes Unit Side /3/16" Hex Wrench of Service Valve Rolled Edge to Il /Captivate Stem 1 Service Hex Headed Valve System 12 88-A4AC4001-1 A -EN 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. 11.2 Low Voltage Hook-up Diagrams Table 11.1 24 VOLTS WIRE SIZE MAX. WIRE LENGTH 18 AWG 150 Ft. 16 AWG 225 Ft. 14 AWG 300 Ft. With A4AH4 With TEM 3, 4 Thermostat Air Handler Outdoor Thermostat Unit Air Handler Outdoor Unit 24 VAC HOTH- -, 24 VAC HOT I R R - -, I I FAN I FAN I G I G I I 24 VAC I 24 VAC B Common B C / I BCommon B Blue � sOV �' I SOVCOOL/HEA I 1t STAGET Y Y1 Y 1t STAGET Y Y1 Y Y2 Y2* HEATING W HEATING 2nd STAGE W 1 Whit 2nd STAGE W 1 Wi hite EMERGENCY W - - - - W -I HEATGENCY EMER HEAT L Pink W - - - - W 2 Pink BK ---- BK WH/BL WH/BL BK WH/BL - - -- BK 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 * If equipped with first stage heat ** 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 88-A4AC4001-1 A -EN 13 Section 12. Electrical - High Voltage 12.1 High Voltage Power Supply LIVE ELECTRICAL COMPONENTS! During installation, testing, servicing, and troubleshooting of this product, it may be nec- essary to work with live electrical components. Failure to follow all electrical safety precau- tions when exposed to live electrical compo- nents could result in death or serious injury. The high voltage power supply must agree with the equipment nameplate. Power wiring must comply with national, state, and local codes. Follow instructions on unit wiring diagram located on the inside of the control box cover and in the Service Facts document included with the unit. 12.2 High Voltage Disconnect Switch Install a separate disconnect switch at the outdoor unit. For high voltage connections, flexible electri- cal conduit is recommended whenever vibra- tion transmission may create a noise problem within the structure. 12.3 High Voltage Ground Ground the outdoor unit per national, state, and local code requirements. 14 88-A4AC4001-1 A -EN 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 70°F. STEP 5 - Set system thermostat to ON. IOFF i q -�� F:: oil �(160 MIN. 88-A4AC4001-1 A -EN 15 Section 14. System Charge Adjustment (Systems can be rated with TXV, EEV or Piston) NOTE: For systems using a indoor piston metering device, refer to the Superheat charging method and chart. For systems using a TXV or EEV indoor metering device, refer to Subcool charging method and charts. 14.1 Temperature Measurements STEP 1 - Check the outdoor temperatures. Subcooling (in cooling mode) is the only recom- mended method of charging above 552 F ambi- ent outdoor temperature. Note: For Superheat (In Cooling Mode), refer to the Superheat Charging Table For best results the indoor temperature should be kept between 702 F to 802 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 55Q 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. Note: Use this method when matched with a TXV or EEV indoor unit. 1I209 F J 559 F x x Outdoor Temp x 8i00 F J 709 F x Indoor Temp 16 88-A4AC4001-1 A -EN STEP 2 - Determine the final subcooling value using total Line Length and Lift measured in STEP 1 and the charts below. 1 1/2 Ton SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE) w B0 Add 3' LL 50 Add 2° 40 1 Add 1 c of Subcooling w 30 z 25 Z 20 ¢ 15 Use Design Subcool Value w c7 10 Q Q 10 20 25 30 40 60 TOTAL REFRIGERANT LINE LENGTH (FEET) 2 1/2 Ton SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE) w 60 1 Add 4c 50 Add 3- 40 Add 2c of Subcooling w 30 Add 1c of Subcooling 25 z 20 ¢ 15 Use Design Subcool Value w c7 10 CE w 0 ¢ 10 20 25 30 40 60 TOTAL REFRIGERANT LINE LENGTH (FEET) 3 1/2 Ton SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE) w 60 Add 6' LL 50 Add 5° 40 Add 3c of Subcooling w 30 Add 2c of Subcooling 25 F Add 1' of Subcooling Z 20 ¢ 15 10 Use Design Subcool Value LL0. Q 10 20 25 30 40 60 TOTAL REFRIGERANT LINE LENGTH (FEET) 5 Ton SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE) f=, 60 50 Add 6' 40 Adtl Sc of Subcooling w 30 Add 4' of Subcooling z 25 z 20 Add 3° of Subcooling ¢ Add 2° of Subcooling ¢ 15 w c7 0 Q Design Add 1c of Subcooling 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. 2 Ton SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE) w 80 Add 4c 50 Add- 40 Add 1c of Subcooling w 30 z 25 Z 20 w 15 Use Design Subcool Value CD 10 10 20 25 30 40 60 TOTAL REFRIGERANT LINE LENGTH (FEET) 3 Ton SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE) 60 1 Add 5° w 50 Add - 40 Add 3° of Subcooling 30 z 25 Add 1" of Subcooling Add 2° z 20 15 Use Design Subcool Value 10 w 0 ¢ 10 20 25 30 40 60 TOTAL REFRIGERANT LINE LENGTH (FEET) 4 Ton SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE) j 60 50 Add 6° 40 Add 4c of Subcooling w 30 Add 3- of Subcooling z 25 ~ 20 Add 2c of Subcooling ¢ Add 1c of Subcooling ¢ 15 CD 10 Use Design Subcool Value w ¢ 10 20 25 30 40 60 TOTAL REFRIGERANT LINE LENGTH (FEET) Design Subcooling Value = ° F (from nameplate or Service Facts) Subcooling Correction = ° F Final Subcooling Value = ° F 00, 20 MIN. 88-MAC4001-1 A -EN 17 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 Final Subcooling Value = ° F 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 122 F Final Su value and liquid temp of 902 F. 1. Locate 12° F Final Subcooling in 2. Locate the Liquid Temperarature the left column. 3. The Liquid Gage Pressure shout, proximately 327 PSI. (This is the s the intersection of the Final Subcoc and the Liquid Temperature row. 18 88-A4AC4001-1 A -EN 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. STEP 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. STEP 8 - Verify typical performance. Refer to System Pressure Tables to verify typical performance. �F2 0 MIN. (Example only - see Pressure Tables) R-410A REFRIGERANT CHARGING CHART LIQUID DESIGN SUBCOOLIN. ff) TEMP 8 9 10 11 12 13 14 (�F) LIQUID GAGE PRESSURE (PSI) 55 179 182 185 188 191 195 198 60 195 198 201 204 208 211 215 65 211 215 218 222 225 229 232 70 229 232 236 240 243 247 251 75 247 251 255 259 263 267 271 80 267 271 275 279 283 287 291 85 287 291 296 Soo 304 309 313 90 309 313 318 322 327 331 336 95 331 33fi 341 346 351 355 360 100 355 386 391 396 376 381 381 86 38fi 3413 105 381 38fi 391 396 402 110 407 413 418 424 429 435 441 115 435 441 448 452 458 464 470 120 464 4�0 4�8 482 488 495 501 125 495 501 507 514 .0 .7 533 Refer to Service Facts or Installer's Guide for charging method. 88-MAC4001-1 A -EN 19 Fixed Orifice Superheat Charging Table Indoor Wet Bulb Temp (F) 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 55 7 9 10 11 12 14 15 17 18 20 21 23 24 26 27 29 30 60 5 7 8 9 10 12 13 15 16 18 19 21 22 24 25 27 28 30 31 65 4 6 8 10 11 13 14 16 17 18 19 21 22 24 25 27 28 27 31 70 5 7 8 10 11 13 14 16 17 18 19 21 22 24 25 27 28 30 31 75 5 6 7 9 10 12 14 16 18 19 21 22 24 26 28 29 31 32 Outdoor Dry 80 4 6 7 9 10 11 12 14 16 18 19 21 23 25 26 28 29 31 33 Bulb Temp. 85 4 6 7 9 10 13 14 16 18 20 21 23 24 26 28 29 30 31 32 (F) 90 4 6 8 10 11 13 14 16 18 20 22 24 25 27 28 30 31 95 4 6 8 10 13 14 16 18 20 22 23 25 26 28 29 100 6 8 10 12 13 16 18 20 21 23 25 27 29 105 4 6 7 9 11 13 15 18 20 22 24 26 28 110 4 7 9 11 13 16 18 21 23 26 28 115 6 9 12 14 16 19 21 24 26 Using a digital psychrometer, measure the return air wet -bulb temperature at the unit just before the coil. Also measure the outdoor dry-bulb tem- perature. Use these temperatures to locate the target superheat on the charging table. Do not attempt to charge the system if these conditions fall outside of this charging table. ADD refrigerant to DECREASE total superheat. REMOVE refrigerant to INCREASE total superheat. Always allow 10 to 15 minutes of operature after any refrigerant or air flow change prior to determining the final superheat. 20 88-A4AC4001-1 A -EN STEP 9 - Record System Information for refer- ence. Record system pressures and temperatures after charging is complete. 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 PSI �11 °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 88-A4AC4001-1 A -EN 21 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 d fuse goo . NO Repair or replace transformer or fuse. Investigate cause for failure (possible short in field wiring) OUT HIGH VOLTAGE IN 22 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 Z' Does the YES Replace the room contactor thermostat energize? NO Repair or replace connecting wiring Double Pole Contactor (MS)* 70 71 OUT HIGH VO LTAG E L2L4+ 'H'L1 L2L+4---4-PL1 IN *Refer to Wiring Diagram to determine if a single pole or double pole contactor is used. 88-A4AC4001-1 A -EN Compressor won't run Contactor is closed Check for high voltage to contactor high voltage pre: at T1 and T2 ? NO Check power supply from disconnect and/or breaker panel. TROUBLESHOOTING Check for open IOL YES (Internal Overload) Check resistance of CtoSand CtoR /Does the :sistance chec Allow compressor show an open YES time to cool and �cuit from C to re -test \or C to R? NO Check for open windings. Des a resistance chec YES Replace the show an open circuit between R and S? compressor NO Check for locked rotor 3Itage pre nt Check Start - at C to S and C YES 10 Capacitor and to R with lockedZ Relay (if present) o r amps o ? and Run Capacitor NO Check wiring to o the sta compressor components and C, Sand R run capacitor/ NO Replace start components and/ or run capacitor YES Replace the compressor 88-A4AC4001-1 A -EN 23 SYSTEM I AR. REFRIGERANT CIRCUIT Head Pressure Too High 0■■■■■■■■■■■■■■■00©0©■■■©■■■■■ Head Pressure Too Low 0■■■■■■■■■■■■■©0■■■■■©©■©©©0■■ Suction Pressure Too Low 0■■■■■■■■■■■■■■�■■■■■■©�©■©■■■ I.E. Coll Frosting 0■■■■■■■■■■■■■■0■■■©©■■■■■■■■■ Compressor Runs Inadequate or No Cooling/Htg 0■■■■■■■■■■■■■©0■©©■■■©0©©©©■■ ©■■■■■■■■■■■■■©0■■©■■■©0©©■©■■ WIM Compressor Cycles on 101. 0■0©0©©©■■■■■0©00©■©©■©■■©■■■■ I.D. B. 000■■■■■©0©■©■■■■■■■■■■■■■■■■■ Unit Won't Initiate Defrost Defrost Terminates on Time c - cooung n - neating N - Fr mary causes s - secondary causes * - 3 vnase my Section 16. Refrigerant Circuits FIELD INSTALLED INTER -CONNECTING TUBING I� INDOOR SECTION I I I I I I REFRIGERANT FLOW FI CONNECT INDOOR COIL CHECK VALVE DRIER EEEI EXPANSION VALVE (TXV/EEV) 1 1/2-Ton Units W OUTDOOR SECTION I" FLARE PRESSURE TAP SUCTION LINE LPCO COMPRESSOR "' FLARE DISCHARGE PRESSURE L NE TAP COIL REFRIGERANT FLOW L IOUID LINE PRINTED FROM D158513P01 24 88-A4AC4001-1 A -EN 2, 2 1/2 & 3-Ton Units FIELD INSTALLED INTER -CONNECTING TUBING I INDOOR OUTDOOR SECTION REFRIGERANT FLOW FIELD CONNECTION INDOOR COIL SECTION 1/4 FLARE PRESSURE TAP SUCTION LINE LPCO COMPRESSOR COIL CHECK VALVE I/4 FLARE DISCHARGE DRIER PRESSURE L NE TAP EXPANSION REFRIGERANT FLOW VALVE LIQUID LINE (TXV/EEV) FIELD PRINTED FROM D157394P01 CONNECTION 3 1/2 & 4-Ton Units FIELD INSTALLED INTER -CONNECTING TUBING INDOOR SECTION I I I P I I T REFRIGERANT FLOW I I FIELD CONNECTION I I 11 cF I INDOOR COIL OUTDOOR SECTION TION COMPRESSOR CHECK VALVE 1/4 FLARE DISCHARGE DRIER PRESSURE L NE TAP EXPANSION REFRIGERANT FLOW VALVE (TXV/EEV) LIQUID LINE PRINTED FROM D158514P01 FIELD CONNECTION 88-A4AC4001-1 A -EN 25 5-Ton Units FIELD INSTALLED INTER -CONNECTING TUB ING I� INDOOR SECTION 1 1/4 FLARE 1 PRESSURE TAP REFRIGERANT FLOW 1 I I FIELD CONNECTION I I INDOOR COIL I I I H I I I I I I I CHECK I I I VALVE I � DRIER I 1 O � 1 EXPANSION VALVE (TXV/EEV) I I 1 I I F I E L I CONNECTION OUTDOOR SECTION -SUCTION LINE -LPCO COMPRESSOR 1/4 FLARE DISCHARGE PRESSURE L NE TAP lm \ � REFRIGERANT FLOW `LIQUID LINE PRINTED FROM D158515P01 26 88-A4AC4001-1 A -EN Notes 88-A4AC4001-1 A -EN 27 c us /STEOUnitary Small HIP AHRI Standard 210/240 Q� Intertek Ingersoll Rand Ingersoll Rand has a policy of continuous product and product data improvement 6200 Troup Hwy, and it reserves the right to change design and specifications without notice. Tyler, TX 75707 www.ingersollrandproducts.com © 2019 Ingersoll Rand -- All Rights Reserved 05/19