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BLD2021-0946_Applicant_Response_7.8.2021_12.48.11_PM_2290094Amw" S7�tyd-d 11 -AC29D1 -8-EN HEATING & AIR CONDITIONING Installer's Guide Condensing Units 4A7A3 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 only with TXV/EEV indoor systems. Some of the benefits of installing approved matched indoor and out- door 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.........................................6 Section 6. Refrigerant Line Routing.....................................................8 Section 7. Refrigerant Line Brazing......................................................8 Section 8. Refrigerant Line Leak Check.............................................10 Section 9. Evacuation...........................................................................12 Section 10. Service Valves...................................................................12 Section 11. Electrical - Low Voltage....................................................13 Section 12. Electrical - High Voltage...................................................15 Section 13. Start Up..............................................................................16 Section 14. System Charge Adjustment.............................................17 Section 15. Checkout Procedures and Troubleshooting ................... 22 Section 16. Refrigerant Circuits.......................................................... 26 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. 11 -AC29D1 -8-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` (lb) 4A7A3018H 29 x 26 x 29 133 4A7A3024H 29 x 26 x 29 130 4A7A3030H 29 x 26 x 29 137 4A7A3036H 29 x 30 x 33 147 4A7A3042E 29 x 30 x 33 172 4A7A3048E 37 x 30 x 33 184 4A7A3060D 37 x 34 x 37 226 * 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 TOTAL length of refrigerant lines from outdoor to indoor unit should NOT exceed 150 feet* (including lift). 2. The maximum vertical change should not exceed 50 feet*. 3. Standard and alternate line sizes and service valve connection sizes are shown in Table 5.1. See Table 5.1 for exceptions for certain tonnages. Note: For other line lengths, Refer to Refriger- ant Piping Application Guide, SS-APGO06-EN or Refrigerant Piping Software Program, 32- 3312-xx (latest revision). Standard Line Set 150' Max TOTAL Line Length 11-AC29 D 1-8-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. It is not recommended to install in a location where noise may distract the building occu- pants. Some examples of these types of loca- tions are sleeping quarters and by windows of a living area. Please discuss location with the building owner prior to installation. Avoid locations such as near windows where condensation and freezing defrost vapor can annoy a customer. 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 or icicles from falling directly on the unit. 2.4 Cold Climate Considerations NOTE. It is recommended that these precau- tions be taken for units being installed in areas where snow accumulation and prolonged below freezing temperatures occur. Units should be elevated 3-12 inches above the pad or rooftop, depending on local weather. This additional height will allow drainage of snow and ice melted during defrost cycle prior to its refreezing. Ensure that drain holes in unit base pan are not obstructed preventing draining of defrost water. • If possible, avoid locations that are likely to accumulate snow drifts. If not possible, a snow drift barrier should be installed around the unit to prevent a build-up of snow on the sides of the unit. Avoid Install Near Bedrooms Min 5' Unrestricted Min 3' Min. 12" to Unrestricted Shrubbery —' I I Access Panel I I '�' m nuw,u�Mu+dm�4�+i�dwu�MwJa�ol�+N�wlh�rvitl��,i,tlmuiww ai�wwm+s� IT Shrubbe to We I �.` �t MIMIC Min. 12" �. �Snow 11IDDDUlIDIVV@E )IIIIAA VIRTUE11 Barrier IDIDID[RR Snow Legs Q 3-12" Elevation Pad 4 11 -AC29D1 -8-EN 2.5 Coastal Considerations 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. 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. For other applications refer to application guide. REMOVE TABS AS SHOWN 11-AC29D1-8-EN 5 Section 5. Refrigerant Line Considerations 5.1 Refrigerant Line and Service Valve Connection Sizes Table 5.1 RATED LINE SIZES Line Sizes Service Valve Connection Sizes Max Line & Lift Lengths Vapor Line Liquid Line Vapor Line Connection Liquid Line Connection TOTAL Max Line Length (ft.) Max Lift (ft.) 4A7A3018H 3/4 3/8 3/4 3/8 150 50 4A7A3024H 3/4 3/8 3/4 3/8 150 50 4A7A3030H 3/4 3/8 3/4 3/8 150 50 4A7A3036H 3/4 3/8 3/4 3/8 150 50 4A7A3042E 7/8 3/8 7/8 3/8 150 50 4A7A3048E 7/8 3/8 7/8 3/8 150 50 4A7A3060D 7/8 3/8 7/8 3/8 150 50 Note: For other line lengths, Refer to Refrigerant Piping Application Guide, SS-APG006-EN or Refrigerant Piping Software Program, 32-3312-xx (latest revision). 11 -AC29D1 -8-EN 5.2 Factory Charge American Standard outdoor condensing units are factory charged with the system charge required for the out- door 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. 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. 11-AC29 D 1-8-EN 7 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. 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 900 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 11 -AC29D1 -8-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 11-AC29 D 1-8-EN 9 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. Nro 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 �a e e, 10 11 -AC29D1 -8-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 11-AC29 D 1-8-EN 11 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 12 11 -AC29D1 -8-EN 10.1 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. 11-AC29 D 1-8-EN 13 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 24 VAC I*� I B Common Blue I sOV ^vJ LU I COOL/HEAT Y Y 1 Y2* J_E With TAM 4, 7 Outdoor Thermostat Air Handler Unit 24 VAC HOT R R FAN G G 24 VAC B C / B B Common Blue SOV COOL/HEAT 1st STAGE YI YI Yp Yp 2nd STAGE W 1 V V 2nd STAGE W 1 V V 1 White White EMERGENCY �t EMERGENCY �t HEAT W2 ---- W2 HEAT Pink P nk BK ---- BK BK --- BK H/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 WI 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 Yl 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 only - When using a BK enabled comfort control, cut BK jumper on the AFC and connect BK from comfort control to BK of the air handler With Furnace Thermostat Furnace Outdoor Unit With Variable Speed Furnace Thermostat Furnace Outdoor Unit 24 VAC HOT ET R FAN G G 24 Common B/C B B m COOL Y1 9HF _ _ I Y I Y --YLo --- HEATING W 1 W 1 W2 BK ---- BK 1*11 • Units with pigtails require wirenuts for connections. Cap all unused wires. • In AC systems for multiple stages of heat, jumper W1 and W2 together if comfort control has only one stage of heat. * If equipped with second stage heat ** When using a BK enabled comfort control, cut BK jumper and bypass Y and YLo at the furnace. Connect BK from comfort control to BK of the furnace 14 11-AC29D1-8-EN 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. lillll�/�ulcc'a snJJJ/Jii;��Jt ��� 11-AC29 D 1-8-EN 15 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. 0 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. 16 11 -AC29D1 -8-EN Section 14. System Charge Adjustment 14.1 Temperature Measurements STEP 1 - Check the outdoor temperatures. Subcooling (in cooling mode) is the only recom- See Section 14.2 for mended method of charging above 55' F ambi- Outdoor ent outdoor temperature. See Section 14.2. Temperatures Above 550 F For outdoor temperatures below 550 F, see Sec- tion 14.3. See Section 14.3 for Note: It is important to return in the spring or Outdoor summer to accurately charge the system in the Temperatures cooling mode when outdoor ambient tempera- Below 550 F ture is above 55' F. For best results the indoor temperature should be kept between 700 F to 800 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 5.3. Total Line Length = Ft. Vertical Change (Lift) = Ft. LIFT Im ®I ImEM ImEn I 3H Ex :.. man om EN X 1200 F 550 F X Outdoor Temp 1 X 55' F Outdoor Temp 2 XiX 800 F J 700 F Indoor Temp 11-AC29 D 1-8-EN 17 STEP 2 - Determine the final subcooling value using total Line Length and Lift measured in STEP 1 and the charts below. 1.5 Ton Units CHARTSUBCOOL CHARGING CORRECTIONS TABL\\\\\\\\\\\\\\GTH AND RISE) Add 1' 50 60 70 80 90 100 110 120 130 140 1 REFRIGERANT LINE LENGTH (FT) - [includes lift 1 :': <., 2.5 Ton Units CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE) Li 30\\\\0000000000000000000�000000000000000\ J \ z 25 Use Deslgn Subcoolmg w 15 10 ¢ M w \� 20 30 40 50 60 70 80 90 100 110 120 130 140 150 \\NO TOTAL REFRIGERANT LINE LENGTH (FT) - [ includes lift ] 3.5 Ton Units �000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000� SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE) 4° \\ � ao ', � ............... Add d 2° Z 30 Deslgn Subco—ngcc Add1°' y a LuCc 10\ ¢ \ 20 30 40 50 60 70 80 90 100 110 120 130 140 150 TOTAL REFRIGERANT LINE LENGTH (FT) - [ includes lift ] - 5 Ton Units SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE) F 50 1 ° Add 4° 40 z 30 Add 2'. . 25 Use Deslgn Subcooling 15 uj 10Add 1° D V Li 20 30 40 50 60 70 80 90 100 110 120 130 140 150 TOTAL REFRIGERANT LINE LENGTH (FT) - [ includes lift] 2 Ton Units 3 Ton Units \\ SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE) z 350 025 J uj 10 \ \\\\\\\\\\\\\\\\\\ ( 0 ¢ 20 30 40 50 60 70 80 90 100 110 120 130 140 150 \,. TOTAL REFRIGERANT LINE LENGTH (FT) - [ includes lift ]\\.........................r 4 Ton Units LL LL 50 � � Add 4 F- J w 20 0 Cc Lu 20 30 40 50 60 70 80 90 100 110 120 130 140 1 REFRIGERANT LINE LENGTH (FT). [includes lift\\ Design Subcooling Value = 0 F (from nameplate or Service Facts) Subcooling Correction = 0 F Final Subcooling Value = ° F 18 11 -AC29D1 -8-EN 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 Final Subcooling Value = ° F STEP 5 - Use the final subcooling valt ant temperature and pressure from S1 determine the proper liquid gage pres Table 14.2. Example: Assume a 120 F Final Su value and liquid temp of 900 F. 1. Locate 120 F Final Subcooling in 2. Locate the Liquid Temperarature the left column. 3. The Liquid Gage Pressure shouli proximately 327 PSI. (This is the sl the intersection of the Final Subcoc and the Liquid Temperature row. 11 -AC29D1 -8-EN 19 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 LIOUID DESIGN SUBCOOLING ("F) TEMP 8 9 10 11 12 13 14 m 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 85 287 291 296 300 304 309 313 90 309 313 318 322 327 331 336 95 331 336 341 346 361 355 360 100 355 360 365 370 376 381 386 105 381 386 391 396 402 407 413 110 407 413 418 424 429 435 441 115 435 441 446 452 458 464 4]O 120 464 4]0 4]6 482 488 495 501 125 4951 501 1 507 1 514 1 520 1 527 1 533 Reter to Service Facls or Installer's Guitle for charging me[hotl. 20 11 -AC29D1 -8-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 14.3 Subcooling Charging Below 550 F Outdoor Temp. The Subcooling Charging method in cooling is not recommended below 550 F outdoor temperature. PSIG PSIG The recommended method of charging at outdoor temperatures below 550 F is weighing in the charge. Return when weather conditions permit charge verification through subcooling. STEP 1 - Determine additional charge. Note: The nameplate charge value represents the amount of refrigerant shipped in the outdoor unit and is compatible with 15 feet of AHRI rated refrigerant lines and the smallest AHRI rated coil. Using the method below, find the charge associ- ated with the additional length of tubing above 15 ft. and record it below. Calculating Charge Using the Weigh -In Method 1) Measure in feet the distance between the outdoor unit and the indoor unit. (Include the entire length of the line from the service valve to the IDU.) Subtract 15 ft from this entire length and record on line 1. 2) Enter the charge multiplier (0.6 oz/ft). Each linear foot of interconnecting tubing requires the addition of 0.6 oz of refrigerant. 3) Multiply the total length of refrigerant tubing (Line 1) times the value on Step 2. Record the result on Line 3 of the Worksheet. 4) This is the amount of refrigerant to weigh-in prior to opening the service valves. °F Weigh -In Method can be used for the initial installation, or anytime a system charge is being replaced. Weigh -In Method can also be used when power is not available to the equipment site or operating conditions (indoor/outdoor temperatures) are not in range to verify with the subcooling charging method. 1. Total Line length (ft) —15 ft 2. Charge multiplier 3. Step 1 x Step 2 4. Refrigerant (oz) x 0.6 oz 11-AC29 D 1-8-EN 21 STEP 2 - 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. k 0 MIN. 0 STEP 3 - Check the liquid line temperature and Measured Liquid Line Temp = ° F liquid gage pressure to obtain a minimum of 100 subcooling in heating mode. Liquid Gage Pressure = PSIG STEP 4 - Add charge if a minimum of 100 sub - cooling is not obtained with the namplate charge plus additional charge previously added. STEP 5 - Return to site for adjustment. Important: Return in the spring or summer to accurately charge the system in the cooling mode with outdoor ambient above 550 F. Section 15. Checkout Procedures and Troubleshooting 15.1 Operational And Checkout Procedures 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 ......................................... [ ] 2. Properly insulate suction lines and fittings .................... [ ] 3. Properly secure and isolate all refrigerant lines ............ [ ] 4. Seal passages through masonry. If mortar is used, prevent mortar from coming into direct contact with copper tubing ........................... [ ] 5. Verify that all electrical connections are tight ................ [ ] 6. Observe outdoor fan during on cycle for clearance and smooth operation ................................................... [ l 7. Be sure that indoor coil drain line drains freely. Pour water intodrain pan................................................................ [ ] 8. Be sure that supply registers and return grilles are open and unobstructed.......................................................... [ l 9. Be sure that a return air filter is installed ...................... [ ] 10. Be sure that the correct airflow setting is used. (Indoor blower motor) ................................................... [ l 11. Operate complete system in each mode to ensure safe operation ................................................... [ ] 22 11 -AC29D1 -8-EN 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 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 ontactor Co 24 VAC Does the YES Replace the room contactor thermostat energize? NO Repair or replace connecting wiring Double Pole Contactor (MS)* 70 71 IN L24-' +JL1 L2L�rL1 'Refer to Wiring Diagram to determine if a single pole or double pole contactor is used. 11 -AC29D1 -8-EN OUT HIGH VOLTAGE IN 23 TROUBLESHOOTING Compressor won't run Contactor is closed Check for high voltage to contactor Check for open IOL high voltage present YES (Internal Overload) at T1 and T2 ? Check resistance of CtoSand CtoR NO Does the Check power esistance chec Allow compressor supply from YES show an open time to cool and disconnect and/or ircuit from C to re -test breaker panel. or C to R? NO FCheck for open windings. yes a resistance chec Replace the show an open circuit YES between R and S? compressor NO Check for locked rotor soltage pre nt Check Start - at C to S and C YES Capacitor and to R with locked 10 Relay (if present) o r amps o ? and Run Capacitor NO Check wiring to o the sta compressor components an C, S and R run capacitor/ NO Replace start components and/ or run capacitor YES Replace the compressor 24 11 -AC29D1 -8-EN 15.2 Troubleshooting SYSTEM FAULTS REFRIGERANT CIRCUIT Head Pressure Too High Head Pressure Too Low Suction Pressure Too High Suction Pressure Too Low I.D. Coil Frosting Compressor Runs Inadequate or No CoolingliBut ©■■■■■■■■■■■■■©�■■©■■■©�©©■©■■ Compressor & O.D. Fan Won't Start Compressor Will Not Start O.D. Fan Runs O.D. Fan Won't Start Compressor Hurns But Won't Start Compressor Cycles on IOL I.D. Blower Won't Start Unit Won't Initiate Defrost Defrost Terminates on Time C - Cooling H - Heating P - Primary Causes S - Secondary Causes * - 3 Phase Only 11 -AC29D1 -8-EN 25 16.0 Refrigerant Circuits 1.5 & 2 Ton Units FIELD INSTALLED INTER -CONNECTING TUB I�NG INDOOR OUTDOOR SECTION I SECTION I I/4 FLARE PRESSURE I TAP UTD00 REFRIGERANT FLOW I SUCTION COIL .. -..- I LINE FIELD I I LPCO CONNECTION I I I 11 1 I I I I I COMPRESSOR T INDOOR I COIL I I I I I I I HPC I I I I I I CHECK I VALVE I I/4 FLARE ICPRESSUREDISCHARGE DRIER ITAP LNE EXPANSION I I REFRIGERANT FLOW VALVE I I (TXV/EEV) I I LIQUID LINE I FIEL I PRINTED FROM D157394P02 REV A CONNECTION 2.5 & 3.5 Ton Units FIELD INSTALLED INTER -CONNECTING TUBING INDOOR OUTDOOR SECTION SECTION 1/4 FLARE PRESSURE TAP REFRIGERANT FLOW SUCTION LINE FIELD LPCO 7 CONNECTION INDOOR COIL CHECK VALVE DRIER EXPANSION VALVE (TXV/EEV) FIELD CONNECTION COMPRESSOR COIL 1 /4 FLARE DISCHARGE PRESSURE L I NE TAP \ �- REFRIGERANT FLOW `LIQUID LINE PRINTED FROM D157394P01 26 11-AC29D1-8-EN 3 & 4Ton Units FIELD INSTALLED INTER -CONNECTING TUB I NG OUTDOOR SECTION INDOOR I I SECT I ON I 114 FLARE PRESSURE TAP I I REFRIGERANT FLOW I 1 SUCTION LINE I 1 LPCO F E IL INDOOR CONNECTION I 1 COIL I I 1 I 1 1 I 1 COMPRESSOR I I 1 I I 1 HPC I 1 I I 1 1114 FLARE I CHECK I PRESSURE I VALVE I TAP LIQUID COIL DISCHARGE DRIER LINE LINE EXPANSION I I REFRIGERANT FLOW VALVE I I (OR FCCV) I I I FIELD PRINTED FROM D158796P01 REV A CONNECTION 5 Ton Units FIELD INSTALLED INTER -CONNECTING TUBING OUTDOOR SECTION INDOOR SECTION I/4 FLARE PRESSURE TAP REFRIGERANT FLOW SUCTION LINE FI 1 CONNECTION�? INDOOR 1 1 COIL T _A COMPRESSOR I/4 FLARE CHECK PRESSURE --� VALVE TAP LIQUID LINE DISCHARGE DRIER LINE EXPANSION Dy REFRIGERANT FLOW VALVE (OR FCCV) PRINTED FROM C151867 FIEL CONNECTION m 11-AC29D1-8-EN 27 Amwc" Si�wdard HEATING & AIR CONDITIONING 6200 Troup Highway Tyler, TX 75707 www.americanstandardair.com CE�US (I$TE� 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. © 2016 American Standard Heating & Air Conditioning 07/16