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BLD2021-1601_Manufacturer_Specifications_and_Installation_Instructions_11.24.2021_1.17.41_PM_2538481,4oy 11-BC38D1-5-EN HEATING A AIR CONDITIONING Installer's Guide Heat Pumps 4A6H4 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................................................................ Section 2. Unit Location Considerations ......................... Section 3. Unit Preparation ............................................... Section 4. Setting the Unit ................................................ Section 5. Refrigerant Line Considerations .................... Section 6. Refrigerant Line Routing ................................ Section 7. Refrigerant Line Brazing ................................. Section 8. Refrigerant Line Leak Check .......................... Section 9. Evacuation........................................................ Section 10. Service Valves ................................................ Section 11. Electrical - Low Voltage ................................. Section 12. Electrical - High Voltage ................................ Section 13. Start Up ........................................................... Section 14. System Charge Adjustment .......................... Section 15. Checkout Procedures and Troubleshooting .. 2 .. 3 ,.5 ,.5 .. 6 .. 7 .. 8 10 11 11 12 15 16 17 23 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. 11-13C38D1-5-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) 4A6H4018G 29 x 26 x 29 141 4A6H4024G 29 x 30 x 33 163 4A6H4030G 29 x 34 x 37 216 4A6H4036G 29 x 34 x 37 198 4A6H4042G 29 x 34 x 37 216 4A6H4048G 33 x 34 x 37 222 4A6H4060G 45 x 34 x 37 278 " Weight values are estimated uncrated. 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. Service valve connection diameters are shown in Table 5.1. Note: For other line lengths, Refer to Refriger- ant Piping Application Guide, SS-APGO06-EN or Refrigerant Piping Software Program, 32- 3312-03 (or latest revision). Standard Line Set 150' Max TOTAL Line Length 11-BC381311-5-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 5Unrestricted — Min 3' Min. 12' to lam— Unrestricted' Shrubbery u_ II- Access Panel AM1n4gmtufrrnrv,+iuµvrviw - �PMI1Mr'�IfN�.nIeII�11rM�nIItWw14P�Po'�nm wu'+�lnullaN Min. 12" NBarner ➢➢ID1ID1➢➢IDl f➢fOff➢[U[Uf ➢➢➢g333 f[➢EIRINIC 11D➢Dl➢lID1ID1 f[Uff➢@f[➢f(Qf ME] MEIRE111 ➢➢�➢➢➢➢➢➢ u11➢➢1➢« m➢���➢➢➢➢➢ «<u1➢«➢««➢ ➢D➢➢➢➢➢➢➢➢ llUllQllQ➢➢K Snow Legs ➢➢IDl333 fN�[IKINf 11D➢D1➢11D➢D1 ff➢ff➢f➢f➢[ff➢f 3-12" Elevation o n Pad 4 11-BC38D1-5-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. REJSA TASH 11-BC38D1-5-EN 5 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 4A6H4018G 3/4 3/8 3/4 3/8 4A6H4024G 3/4 3/8 3/4 3/8 4A6H4030G 3/4 3/8 3/4 3/8 4A6H4036G 3/4 3/8 3/4 3/8 4A6H4042G 7/8 3/8 7/8 3/8 4A6H4048G 7/8 3/8 7/8 3/8 4A6H4060G 1-1/8 3/8 7/8 3/8 * 5/8 adapter factory supplied 5.2 Factory Charge American Standard Heating & Air Conditioning 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. 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. Liquid Line Vapor Line Insulation 11-BC38D1-5-EN 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 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=01 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-BC38D1-5-EN 7 8 Feet Maximum Wall 0 0 0 0 0 0 0 0 0 0 Isolator 0 0 0 0 0 0 O 0 U. 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 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. DO NOT hang line sets from ductwork 8 11-BC38D1-5-EN 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. N ! o 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, 11-BC38D1-5-EN 9 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 10 11-13CWD1-5-EN 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 11-BC38D1-5-EN 11 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. Table 11.1 24 VOLTS WIRE SIZE MAX. WIRE LENGTH 18 AWG 150 Ft. 16 AWG 225 Ft. 14 AWG 300 Ft. 12 11-BC38D1-5-EN 11.2 Low Voltage Hook-up Diagrams With TEM 3, 4, 6, 8 With TAM 4,5,7,9 Thermostat Air Handler Outdoor Thermostat Air Handler Outdoor Unit Unit 24 VAC HOT FAN 24 VAC BBC Common LJ� SOV COOL/HEAT 1st STAGE HEATING 2nd STAGE Fw] EMERGENCY �/ HEAT X2 R ---- - - - -E ----M ---_E ---- Y* - -- --�- 1 W1 --- WZ Pink --- XZ Black 24 VAC HOT IKI FAN Et 24 VAC Common SOV Er COOL/HEAT 1st STAGE YI HEATING 2nd STAGE EMERGENCY 191 HEAT ---- YI --�- W1 1 --- W2 -__ IX22Pink • Units with pigtails require wirenuts for connections. • In AC systems for multiple stages of electric heat, jumper W1 and W2 together if comfort control has only one stage of heat. * Y2 for TEM6 11.3 Defrost Control - All Models but 036D Defrost controls have a selectable termination tem- perature. As shipped, defrost will terminate at 470F. For a higher termination temperature, cut Jumper J2 to achieve 70°F. See Service Facts shipped in the outdoor unit for more information. Pin Identification on J5 (See Illustration) 1. TEST —COMMON (Shorting to FRC_DFT causes the control to initiate Forced Defrost. Leaving this pin open results in the normal mode of operation.) 2. FRC_DFT = Forced Defrost (Short TEST_ COMMON to this pin for two (2) seconds to initiate a forced defrost. Remove the short after defrost initiates.) Defrost Control Checkout Normal operation requires: • Status LED on board flashing 1 time/second in standby or 2 times/second with a call for heating or cooling. Defrost Board Detail Ll I- 05 i D3 p� = of , J3 EM I p2— CI 011 1"ITC 7R6°ID IC R31 C19 OX1 RigliUruRl0R8/�u� .R99 Rt3r?�C20 ������������� p'gn I 012, • uR5 U1 L J B7 J • amp ^��'�������������� `iu�u �� 01 J uRCC29, • R13C ]um� n[ • Rlf[ ] R65 0­ ar7rtus C23� • R71 020 022 �mm1"i1 ^' on K� �( rkr ocaxrte R67u +3. 3V RIE '�=2 uI-II-rr R33 U CIO C9 • U021-RIFR22� C2nn U3 u Rr719 R12uC 22 �nr • = Tugl R21 S'x-cx C • Rg2 ]6 R2 JS [ ]R62Rg0 [Rl.] U� O " R17L I C 12f3 "� ` ODIL T ° J2 �. JPR2 a o � TERMSOF7 MTI T Mii T • 24V AC between R & B • 24V AC between Y, YO & B with unit operating • Defrost initiation when FRC_DFT pin is shorted to TEST —COMMON pin. J5 Test Pins If a defrost control problem is suspected, refer to the service information in control box. 11-BC381311-5-EN 13 11.3 Defrost Control - 036D Model ONLY Defrost Termination Temperatures Outdoor Temperature Termination Temperature As Shipped >22°F 47°F 10°F-22°F ODT + 25°F Defrost controls have a selectable termination temperature. As shipped, defrost will terminate at 470F. For a higher termination temperature, cut Jumper J2 to achieve 70°F when at or below 30°F ambient. See Service Facts shipped in the outdoor unit for more information. Pin Identification (See Illustration at right) 1. TEST —COMMON (Shorting any of the other pins to this pin causes the function of the other pin to be executed. Leaving this pin open results in the normal mode of operation.) 2. TST = Test (Shorting TEST_COMMON to this pin speeds up all defrost board timings.) 3. FRC_DFT = Forced Defrost (Short TEST —COMMON to this pin for two (2) seconds to initiate a forced defrost. Remove the short after defrost initiates.) Defrost Control Checkout Normal operation requires: • LED on board flashing 1 time/second. • 24V AC between R & B. • 24V AC between Y & B with unit operating. • Defrost initiation when FRC_DFT pin is shorted to TEST —COMMON pin. If a defrost control problem is suspected, refer to the service information in control box. Defrost Board Detail Q /� J1 JUMPER 2 / 1 J2 /--1 ' FRC_DFT � y TEST PINS a o o TST Z 0 J3 o 14 11-BC38D1-5-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. 11-BC38D1-5-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. 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. 16 11-BC38D1-5-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. X 1200 F 550 F X Outdoor Temp 1 X 550 F Outdoor Temp 2 XiX 800 F J 700 F Indoor Temp 11-BC38D1-5-EN 17 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 Heat Pump _ SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE) 50 Add 1° 4° 40 Add 1 ° Add 2° w z 30 1° J Z 25 Use Design Subcooling 1 ° 0< 15 Add1° 0 10 W 0 w ¢ 20 30 40 50 60 70 80 90 100 110 120 130 140 150 TOTAL REFRIGERANT LINE LENGTH (FT) - [ includes lift ] 2 1/2 Ton Heat Pump _ SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE) 50 1° 7 40Add 1' Add 2° z 30 Add 1' J Z 25 ,. Use Design Subcooling 15 1° CW7 10 LL 0 w cc20 30 40 50 60 70 80 90 100 110 120 130 140 150 TOTAL REFRIGERANT LINE LENGTH (FT) - [ includes lift ] 3 1/2 Ton Heat Pump _ SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE) 50 Add 4° 40 Add 1 ° z 30 Add 1 ° Add 20 J Z 250P Use Design Subcooling ¢ 1s Add1° 0 10 LL 0 fr w 20 30 40 50 60 70 80 90 100 110 120 130 140 150 TOTAL REFRIGERANT LINE LENGTH (FT) - [ includes lift ] 5 Ton Heat Pump 2 Ton Heat Pump _ SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE) 50 1° 40 Add 1 ° Add 2° z 30 Add 1 ° J Z 25 Use Design Subcooling ¢ 15 Lu 10 LL 0 w Er20 30 40 50 60 70 80 90 100 110 120 130 140 150 TOTAL REFRIGERANT LINE LENGTH (FT) - [ includes lift ] 3 Ton Heat Pump -- SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AN LL 50 4° Zi 40 Add 1' Add 2° z Add 1° J Use Design Subcooling a g 1° ¢ 0 w ¢ 20 30 40 50 60 70 80 90 100 110 120 130 140 150 TOTAL REFRIGERANT LINE LENGTH (FT) - [ includes lift 4Ton Heat Pump _ SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE) 50 1° Add 4° Lu 30 1 ° Add 1 ° Add 2° :IZ 25 Use Design Subcooling ¢ 15 Lu T 10 r 0 w 20 30 40 50 60 70 80 90 100 110 120 130 140 150 TOTAL REFRIGERANT LINE LENGTH (FT) - [ includes lift ] SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE) Design Subcooling Value = O F (from nameplate or Service Facts) REFRIGERANT LINE LENGTH (FT) - [ includes lift ] 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. Subcooling Correction = ° F Final Subcooling Value = 0 F �F20 MIN. 18 11-BC381D1-5-EN STEP 4 - Measure the liquid line temperature and pressure at the outdoor unit's service valve. Measured Liquid Line Temp = ° F Liquid Gage Pressure = PSIG Final Subcooling Value = ° F STEP 5 - Use the final subcooling vale ant temperature and pressure from S7 determine the proper liquid gage pres Table 14.2. Example: Assume a 12' F Final Su value and liquid temp of 900 F. 1. Locate 12' F Final Subcooling in 2. Locate the Liquid Temperarature the left column. 3. The Liquid Gage Pressure shouli proximately 327 PSIG. (This is the the intersection of the Final Subcoc and the Liquid Temperature row. 11-BC38D1-5-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 Curves in the Service Facts to verify typical performance. �F2 0 MIN. (Example only - see Service Facts) Eee39B ::9 :9:::::9::9::9:9 991911 iiii119119iia19 u® ii----------------------------------- ®u�E________________________ --------------------- ------------- ----------------------------------- ----------------------------------- ---------------------------------- ®�i---------------- ------------------------------------ ________________________________ i®i®l__________________________________ i®iM___________________________________ 20 11-13CMD1-5-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. (In Heating Only) The Subcooling Charging method in cooling is not recommended below 550 F outdoor tem- perature. The only recommended method of charging at outdoor temperatures below 55' F is weighing in the charge in heating mode. 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 STEP 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. STEP 2 - Enter the charge multiplier (0.6 oz/ft). Each linear foot of interconnecting tubing requires the addi- tion of 0.6 oz of refrigerant. STEP 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. STEP 4- This is the amount of refrigerant to weigh-in prior to opening the service valves. °F PSIG PSIG 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-BC38D1-5-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. STEP 3 - Check the liquid line temperature and liquid gage pressure to obtain a minimum of 100 subcooling in heating mode. Measured Liquid Line Temp = ° F 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. 20 MIN. 22 11-BC38D1-5-EN 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 ......................................... [ ] 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 11-BC38D1-5-EN 23 15.2 Troubleshooting SYSTEM FAULTS Suction Pressure Too High Suction Pressure Too Low I.D. Coil Frosting Compressor Runs Inadequate or No Cooling/Htg Compressor & O.D. Fan Won't Start Compressor Will Not Start But C.D. Fan Runs O.D. Fan Won't Start Compressor Hums 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 Amff?4*v HEATING A AIR CONDITIONING 6200 Troup Highway Tyler, TX 75707 www.americanstandardair.com C T US 0STED 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 10/18 11-BC38D1-5-EN 24