American Standard 4A7A4018N Installation And Operation Manual
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American Standard 4A7A4018N Installation And Operation Manual

Condensing units
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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. 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 ...................................................... 8
Section 8. Refrigerant Line Leak Check ............................................. 10
Section 9. Evacuation .......................................................................... 11
Section 10. Service Valves .................................................................. 11
Section 11. Electrical - Low Voltage ................................................... 12
Section 12. Electrical - High Voltage .................................................. 15
Section 13. Start Up.............................................................................. 16
Section 14. System Charge Adjustment............................................. 17
Section 15. Checkout Procedures ...................................................... 23
Section 16. Refrigerant Circuits .......................................................... 23
Section 17. Wiring Diagrams ............................................................... 26
Section 18. Pressure Curves ............................................................... 36
Installation and Operation Manual
Condensing Units
4A7A4018 - 060
11-AC11D1-9E-EN

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Summary of Contents for American Standard 4A7A4018N

  • Page 1: Table Of Contents

    11-AC11D1-9E-EN Installation and Operation Manual Condensing Units 4A7A4018 – 060 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 This information is intended for use by individuals LIVE ELECTRICAL COMPONENTS! possessing adequate backgrounds of electrical and During installation, testing, servicing, and trouble- mechanical experience. Any attempt to repair a central shooting of this product, it may be necessary to work 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) 4A7A4018N 29 x 26 x 29 4A7A4019N 29 x 30 x 33 4A7A4024N 29 x 26 x 29 4A7A4025N...
  • Page 4 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 Standard exceed sixty (60) feet. Line Set 150’ Max TOTAL Line Length 3.

  • Page 5: Section 3. Unit Preparation

    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. Min.

  • Page 6: 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 4A7A4018N 4A7A4019N 4A7A4024N 4A7A4025N 4A7A4030N 4A7A4036N 4A7A4042N 4A7A4048N 4A7A4049N 4A7A4060N 1-1/8 4A7A4018L 4A7A4024/25L...

  • 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: Section 7. Refrigerant Line Brazing

    8 Feet Maximum Wall Isolator Line Set 8 Feet Maximum Side View 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 Wall Sealant Ductwork...
  • Page 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.

  • Page 10: Section 8. Refrigerant Line Leak Check

    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 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.

  • Page 11: Section 9. Evacuation

    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. 0350 Microns STEP 1 - Evacuate until the micron gauge reads no higher than 350 microns, then close off the valve to the vacuum pump.

  • Page 12: Section 11. Electrical - Low Voltage

    10.2 Open the Liquid Service Valve WARNING 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. Unit Side 3/16” Hex Wrench Failure to follow this warning will result in abrupt of Service release of system charge and may result in Valve...
  • Page 13 11.2 Low Voltage Hook-up Diagrams For 018N - 060N Models: With TEM 3, 4, 6, 8 With TAM 4, 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...
  • Page 14 For 018L, 024/25L, 030/31L, 036/37L, 036/37M, 042/43L, 048L and 060L Models: With TEM 3, 4, 6, 8 With TAM 4, 7, 9 Outdoor Outdoor Thermostat Air Handler Thermostat Air Handler Unit Unit 24 VAC HOT 24 VAC HOT 24 VAC 24 VAC Common Common...

  • Page 15: 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 16: 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 17: Section 14. System Charge Adjustment

    Section 14. System Charge Adjustment 14.1 Temperature Measurements (Systems can be rated with TXV, EEV or Piston. Ensure charging method is correct). STEP 1 - Check the outdoor temperatures. 120º F Subcooling (in cooling mode) is the only recom- mended method of charging above 55º F ambi- ent outdoor temperature.
  • Page 18 STEP 2 - Determine the final subcooling value using total Line Length and Lift measured in STEP 1 and the charts below. For 018N - 060N Models: & 019 Models Models SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE) SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE) Add 1°...
  • Page 19 For 018L, 024/25L, 030/31L, 036/37L, 036/37M, 042/43L, 048L and 060L Models: 018 Models 024 & 025 Models 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°...
  • Page 20 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 = __________ PSI 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 R-410A REFRIGERANT CHARGING CHART...
  • Page 21 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 22 Fixed Orifice Superheat Charging Table Indoor Wet Bulb Temp (F) Outdoor Bulb Temp. 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.

  • Page 23: Section 15. Checkout Procedures

    Section 15. Checkout Procedures 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 24 042N & 048N Models 042/43L & 048L Models PRINTED FROM D158514P01 049N & 060N Models PRINTED FROM D159175 11-AC11D1-9E-EN...
  • Page 25 018L Models PRINTED FROM D158513P01 060L Models PRINTED FROM D158515P01 11-AC11D1-9E-EN...

  • Page 26: Section 17. Wiring Diagrams

    Section 17. Wiring Diagrams 018N, 019N, 024N, 025N, 042N & 049N Models 11-AC11D1-9E-EN...
  • Page 27 018N, 019N, 024N, 025N, 042N & 049N Models 11-AC11D1-9E-EN...
  • Page 28 030N, 036N & 048N Models PRINTED FROM D157362P05 REVB 11-AC11D1-9E-EN...
  • Page 29 030N, 036N & 048N Models PRINTED FROM D157362P05 REVB 11-AC11D1-9E-EN...
  • Page 30 060N Models 11-AC11D1-9E-EN...
  • Page 31 060N Models 11-AC11D1-9E-EN...
  • Page 32 Models 018L, 024/25L, 030/31L, 036/37L, 036/37M, 042/43L & 048L PRINTED FROM D157362P05 REVB 11-AC11D1-9E-EN...
  • Page 33 Models 018L, 024/25L, 030/31L, 036/37L, 036/37M, 042/43L & 048L PRINTED FROM D157362P05 REVB 11-AC11D1-9E-EN...
  • Page 34 060L Models 11-AC11D1-9E-EN...
  • Page 35 060L Models 11-AC11D1-9E-EN...

  • Page 36: Section 18. Pressure Curves

    Section 18. Pressure Curves PRESSURE CURVES (Refer below table for models) INDOOR ENTERING WET BULB CURVES TOP TO BOTTOM 71, 67, 63 AND 59 DEG F. Cooling OD Model OUTDOOR TEMPERATURE (Degree F) @SCFM 4A7A4018N1 INDOOR ENTERING WET BULB CURVES TOP TO BOTTOM 71, 67, 63 AND 59 DEG F.
  • Page 37 PRESSURE CURVES (Refer below table for models) INDOOR ENTERING WET BULB CURVES TOP TO BOTTOM 71, 67, 63 AND 59 DEG F. Cooling OD Model @SCFM OUTDOOR TEMPERATURE (Degree F) 4A7A4019N1 INDOOR ENTERING WET BULB CURVES TOP TO BOTTOM 71, 67, 63 AND 59 DEG F. OUTDOOR TEMPERATURE (Degree F) COOLING PERFORMANCE CAN BE CHECKED WHEN THE OUTDOOR TEMP IS ABOVE 65 DEG F.
  • Page 38 PRESSURE CURVES (Refer below table for models) INDOOR ENTERING WET BULB CURVES TOP TO BOTTOM 71, 67, 63 AND 59 DEG F. Cooling OD Model @SCFM 4A7A4024N1 4A7A4025N1 OUTDOOR TEMPERATURE (Degree F) 4A7A4030N1 INDOOR ENTERING 4A7A4036N1 1000 WET BULB CURVES TOP TO BOTTOM 71, 67, 63 AND 59 DEG F.
  • Page 39 PRESSURE CURVES (Refer below table for models) INDOOR ENTERING WET BULB CURVES TOP TO BOTTOM 71, 67, 63 AND 59 DEG F. Cooling OD Model @SCFM 1400 4A7A4048N1 OUTDOOR TEMPERATURE (Degree F) 4A7A4049N1 1400 INDOOR ENTERING 4A7A4060N1 1600 WET BULB CURVES TOP TO BOTTOM 71, 67, 63 AND 59 DEG F.
  • Page 40 PRESSURE CURVES (Refer below table for models) INDOOR ENTERING WET BULB CURVES TOP TO BOTTOM 71, 67, 63 AND 59 DEG F. Cooling OD Model @SCFM OUTDOOR TEMPERATURE (Degree F) 4A7A4018L1 INDOOR ENTERING WET BULB CURVES TOP TO BOTTOM 71, 67, 63 AND 59 DEG F. OUTDOOR TEMPERATURE (Degree F) COOLING PERFORMANCE CAN BE CHECKED WHEN THE OUTDOOR TEMP IS ABOVE 65 DEG F.
  • Page 41 PRESSURE CURVES (Refer below table for models) INDOOR ENTERING WET BULB CURVES TOP TO BOTTOM 71, 67, 63 AND 59 DEG F. Cooling OD Model @SCFM 4A7A4024L1 4A7A4025L1 4A7A4030L1 4A7A4031L1 1100 4A7A4036L1 OUTDOOR TEMPERATURE (Degree F) 4A7A4037L1 1050 INDOOR ENTERING 1100 4A7A4036M1 WET BULB CURVES...
  • Page 42 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-AC11D1-9E-EN 17 Jun 2022 Supersedes 11-AC11D1-9D-EN (February 2022) © 2022 American Standard Heating and Air Conditioning...

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