American Standard 4A7A5018-060 Installation And Operation Manual
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American Standard 4A7A5018-060 Installation And Operation 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. 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.................................................................... 4
Section 4. Setting the Unit ..................................................................... 5
Section 5. Refrigerant Line Considerations ......................................... 5
Section 6. Refrigerant Line Routing ..................................................... 6
Section 7. Refrigerant Line Brazing ...................................................... 7
Section 8. Refrigerant Line Leak Check ............................................... 9
Section 9. Evacuation ............................................................................ 9
Section 10. Service Valves .................................................................. 10
Section 11. Electrical - Low Voltage ................................................... 10
Section 12. Electrical - High Voltage .................................................. 13
Section 13. Start Up.............................................................................. 13
Section 14. System Charge Adjustment............................................. 14
Section 15. Checkout Procedures ...................................................... 19
Section 16. Refrigeration Circuits........................................................20
Section 17. Wiring Diagrams................................................................22
Section 18. Pressure Curves................................................................26
Installation and Operation Manual
Condensing Units
4A7A5018 - 060
11-AC46D1-1B-EN

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Summary of Contents for American Standard 4A7A5018-060

  • Page 1: Table Of Contents

    11-AC46D1-1B-EN Installation and Operation Manual Condensing Units 4A7A5018 – 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 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) 4A7A5018N 29 x 30 x 33 4A7A5024N 29 x 30 x 33 4A7A5030N 37 x 30 x 33 4A7A5036N 37 x 34 x 37 4A7A5042N...

  • Page 4: Section 3. Unit Preparation

    2.3 Suggested Locations for Best Reliability Avoid Install Ensure the top discharge area is unrestricted for Near Bedrooms at least five (5) feet above the unit. Three (3) feet clearance must be provided in Min 5’ Unrestricted front of the control box (access panels) and any other side requiring service.

  • Page 5: Section 4. Setting The Unit

    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. •...

  • Page 6: Section 6. Refrigerant Line Routing

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

  • Page 7: 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 8 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 9: 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 10: 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 11 11.2 Low Voltage Hook-up Diagrams 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 Blue COOL/HEAT COOL/HEAT 1st STAGE...
  • Page 12 2 Stage AC Thermostat AUX 1 AUX 1 AUX 1 AUX 2 AUX 2 INDOOR UNIT OUTDOOR UNIT AUX 2 24VAC HOT COMMON Y1/YIo COOLING Y/Y2 HEATING 11-AC46D1-1B-EN...

  • Page 13: 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 14: Section 14. System Charge Adjustment

    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 70ºF.
  • Page 15 14.2 Subcooling Charging in Cooling (Above 55º 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 STEP 2 - Determine the final subcooling value using total Line Length and Lift measured in STEP 1 and the charts below. 018 Units 024 Units SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE)
  • Page 16 STEP 3 - Stabilize the system by operating for a minimum of 20 minutes. At startup, or whenever charge is removed or 20 MIN. added, the system must be operated for a mini- mum of 20 minutes to stabilize before accurate measurements can be made.
  • Page 17 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 18 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 19: 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 20: Section 16. Refrigeration Circuits

    Section 16. Refrigeration Circuits 5018 & 5024 Models PRINTED FROM D157394P01 5030 & 5036 Models PRINTED FROM D158514P01 11-AC46D1-1B-EN...
  • Page 21 5042 & 5048 Models Printed from D157878 5060 Models Printed from D159175 11-AC46D1-1B-EN...

  • Page 22: Section 17. Wiring Diagrams

    Section 17. Wiring Diagrams 4A7A5018 - 048 Models 11-AC46D1-1B-EN...
  • Page 23 4A7A5018 - 048 Models 11-AC46D1-1B-EN...
  • Page 24 4A7A5060 Models 11-AC46D1-1B-EN...
  • Page 25 4A7A5060 Models 11-AC46D1-1B-EN...

  • Page 26: 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 @SCFM OUTDOOR TEMPERATURE (Degree F) 4A7A5018N1 INDOOR ENTERING WET BULB CURVES TOP TO BOTTOM 71, 67, 63 AND 59 DEG F.
  • Page 27 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) 4A7A5024N1 4A7A5030N1 INDOOR ENTERING WET BULB CURVES 4A7A5036N1 TOP TO BOTTOM 71, 67, 63 AND 59 DEG F.
  • Page 28 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-AC46D1-1B-EN 05 Jul 2022 Supersedes 11-AC46D1-1A-EN (April 2022) © 2022 American Standard Heating and Air Conditioning...

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