American Standard 4A6H6 Installer's Manual
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American Standard 4A6H6 Installer's Manual

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ALL phases of this installation must comply with NATIONAL, STATE AND LOCAL CODES
IMPORTANT - This Document is customer property and is to remain with this unit. Please return to service informa-
tion pack upon completion of work.
These instructions do not cover all variations in systems or provide for every possible contingency to be met in connection with
the installation. Should further information be desired or should particular problems arise which are not covered sufficiently for the
purchaser's purposes, the matter should be referred to your installing dealer or local distributor.
Note: The manufacturer recommends installing only approved matched indoor and outdoor systems. All of the manufacture's split
systems are A.H.R.I. rated only with TXV/EEV indoor systems. Some of the benefits of installing approved matched indoor and
outdoor split systems are maximum efficiency, optimum performance and the best overall system reliability.

Table of Contents

Section 1. 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 ..................................................... 7
Section 7. Refrigerant Line Brazing ...................................................... 9
Section 8. Refrigerant Line Leak Check ............................................. 11
Section 9. Evacuation .......................................................................... 11
Section 10. Service Valves................................................................... 12
Section 11. Electrical - Low Voltage .................................................... 13
Section 12. Electrical - High Voltage ................................................... 16
Section 13. Start Up.............................................................................. 17
Section 14. System Charge Adjustment ............................................. 18
Installer's Guide
Heat Pumps
4A6H6
11-BC39D1-1E-EN

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Summary of Contents for American Standard 4A6H6

  • Page 1: Table Of Contents

    11-BC39D1-1E-EN Installer’s Guide Heat Pumps 4A6H6 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.

  • Page 2: Section 1. Safety

    Section 1. Safety WARNING WARNING LIVE ELECTRICAL COMPONENTS! This information is intended for use by individuals During installation, testing, servicing, and trouble- possessing adequate backgrounds of electrical and shooting of this product, it may be necessary to work mechanical experience. Any attempt to repair a central with live electrical components.

  • Page 3: Section 2. Unit Location Considerations

    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) 4A6H6024N 41 x 34 x 37 4A6H6036N 45 x 34 x 37 4A6H6048N 45 x 34 x 37 4A6H6060N 45 x 34 x 37 4A6H6018H...
  • Page 4 2.3 Suggested Locations for Best Reliability Ensure the top discharge area is unrestricted for at least five (5) feet above the unit. Avoid Install Near Bedrooms Three (3) feet clearance must be provided in front of the control box (access panels) and any other side requiring service.

  • Page 5: Section 3. Unit Preparation

    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.

  • Page 6: Section 5. Refrigerant Line Considerations

    Section 5. Refrigerant Line Considerations 5.1 Refrigerant Line and Service Valve Connection Sizes Table 5.1 Line Sizes Service Valve Connection Sizes Vapor Liquid Vapor Line Liquid Line Model Line Line Connection Connection 4A6H6024N 4A6H6036N 4A6H6048N 4A6H6060N 1-1/8 Alternate Line Sizes Line Sizes Service Valve Connection Sizes Vapor...

  • Page 7: Section 6. Refrigerant Line Routing

    5.4 Refrigerant Line Insulation Important: The Vapor Line must always be Vapor Line insulated. DO NOT allow the Liquid Line and Liquid Line Vapor Line to come in direct (metal to metal) Insulation contact. 5.5 Reuse Existing Refrigerant Lines CAUTION If using existing refrigerant lines make certain that all joints are brazed, not soldered.
  • Page 8 8 Feet Maximum Joist/Rafter Isolator Side View 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...

  • Page 9: Section 7. Refrigerant Line Brazing

    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.
  • Page 10 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.

  • Page 11: Section 8. Refrigerant Line Leak Check

    Section 8. Refrigerant Line Leak Check 8.1 Check For Leaks STEP 1 - Pressurize the refrigerant lines and 150 PSIG 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.

  • Page 12: Section 10. Service Valves

    STEP 2 - Observe the micron gauge. Evacuation is complete if the micron gauge does not rise above 500 microns in one (1) minute. 1 MIN. Once evacuation is complete blank off the vacuum pump and micron gauge, and close the valves on the manifold gauge set.

  • Page 13: Section 11. Electrical - Low Voltage

    Section 11. Electrical - Low Voltage 11.1 Low Voltage Maximum Wire Length Table 11.1 defines the maximum total length of Table 11.1 low voltage wiring from the outdoor unit, to the 24 VOLTS indoor unit, and to the thermostat. WIRE SIZE MAX.
  • Page 14 For 018H - 060H Models: With TEM 3, 4, 6, 8 With TAM 4, 5, 7, 9 Outdoor Outdoor Thermostat Air Handler Thermostat Air Handler Unit Unit 24 VAC HOT 24 VAC HOT 24 VAC 24 VAC Common Common Blue Blue COOL/HEAT COOL/HEAT...
  • Page 15 11.3 Defrost Control Defrost controls have a selectable termination tem- perature. As shipped, defrost will terminate at 47°F. Defrost Board Detail 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.

  • Page 16: Section 12. Electrical - High Voltage

    Section 12. Electrical - High Voltage 12.1 High Voltage Power Supply WARNING 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.

  • Page 17: Section 13. Start Up

    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. DONE CANCEL 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...

  • Page 18: Section 14. System Charge Adjustment

    Section 14. System Charge Adjustment 14.1 Temperature Measurements STEP 1 - Check the outdoor temperatures. 120º F See Section 14.2 for Subcooling (in cooling mode) is the only recom- mended method of charging above 55º F ambi- Outdoor ent outdoor temperature. See Section 14.2. Temperatures 55º...
  • Page 19 STEP 2 - Determine the final subcooling value using total Line Length and Lift measured in STEP 1 and the charts below. For 024N - 060N Models: 2 Ton 3 Ton SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE) SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE) 4°...
  • Page 20 For 018H - 060H Models: 1 1/2 Ton 2 Ton SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE) SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE) Add 3° Add 4° Add 2° Add 2° Add 1° of Subcooling Add 1°...
  • Page 21 STEP 4 - Measure the liquid line temperature and pressure at the outdoor unit’s service valve. Measured Liquid Line Temp = __________ º F Liquid Gage Pressure = __________ PSIG Final Subcooling Value = __________ º F 107 °F STEP 5 - Use the final subcooling value, refriger- Table 14.2 ant temperature and pressure from STEP 4, to determine the proper liquid gage pressure using...
  • Page 22 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.
  • Page 23 STEP 9 - Record System Information for refer- ence. Record system pressures and temperatures after charging is complete. Measured Suction Line Temp = __________ º F Outdoor model number = _________________ Measured Outdoor Ambient = __________ º F Liquid Gage Pressure = __________ PSIG Suction Gage Pressure = __________ PSIG Measured Indoor Ambient = __________ º...
  • Page 24 STEP 2 - Stabilize the system by operating for a minimum of 20 minutes. 20 MIN. 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.

  • Page 25: Section 15. Checkout Procedures And Troubleshooting

    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.
  • Page 26 The manufacturer has a policy of continuous data improvement and it reserves the right to change design and specifications with- out notice. We are committed to using environmentally conscious print practices. 11-BC39D1-1E-EN 13 Jun 2022 Supersedes 11-BC39D1-1D-EN (March 2020) © 2022 American Standard Heating and Air Conditioning...

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