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American Standard 4A7A7 User Manual

American Standard 4A7A7
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11-AC35D1-4-EN
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.
Condensing Units
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.
4A7A7
Installer’s Guide
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 ..................................................... 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 ................... 23
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American Standard 4A7A7 Specifications

General IconGeneral
RefrigerantR-410A
Phase1
Dimensions (Outdoor Unit)Varies by model
Weight (Outdoor Unit)Varies by model
TypeAir Conditioner
HSPF RatingNot Applicable
Energy EfficiencyHigh
StagesSingle Stage
Cooling Capacity (BTU/h)24, 000 - 60, 000
Heating Capacity (BTU/h)Not Applicable
Sound Level (Outdoor)76 dB
Voltage208/230V
Dimensions (Indoor Unit)Varies by model
Weight (Indoor Unit)Varies by model

Summary

Unit Location Considerations

Unit Dimensions and Weight

Table detailing the physical dimensions and weight for various unit models.

Refrigerant Piping Limits

Specifies maximum total length and vertical change for refrigerant lines.

Suggested Locations for Best Reliability

Guidance on positioning the unit for optimal performance and avoiding issues.

Cold Climate Considerations

Precautions for units installed in areas with snow or freezing temperatures.

Coastal Considerations

Requirement for Seacoast Salt Shields in coastal environments.

Unit Preparation

Prepare The Unit For Installation

Steps to check for damage and remove the unit from its pallet.

Setting the Unit

Pad Installation

Guidelines for installing the unit on a support pad, ensuring levelness and drainage.

Refrigerant Line Considerations

Refrigerant Line and Service Valve Connection Sizes

Table detailing line sizes and connection sizes for different unit models.

Factory Charge

Information on the factory refrigerant charge and when adjustments are needed.

Required Refrigerant Line Length

Guidance on determining required line length and lift measurements for system.

Refrigerant Line Insulation

Importance of insulating the vapor line and avoiding metal contact.

Reuse Existing Refrigerant Lines

Precautions when reusing existing refrigerant lines for retrofit applications.

Refrigerant Line Routing

Precautions

Guidelines to prevent noise transmission and ensure proper line routing.

Refrigerant Line Brazing

Braze The Refrigerant Lines

Step-by-step instructions for properly brazing refrigerant lines.

Refrigerant Line Leak Check

Check For Leaks

Procedure for pressurizing lines with nitrogen and checking for leaks.

Evacuation

Evacuate the Refrigerant Lines and Indoor Coil

Steps for evacuating the system using a micron gauge to remove moisture.

Service Valves

Open the Gas Service Valve

Procedure for opening the gas service valve after evacuation.

Open the Liquid Service Valve

Procedure for opening the liquid service valve with extreme caution.

Electrical - Low Voltage

Low Voltage Maximum Wire Length

Table defining maximum total length for low voltage wiring based on wire size.

Low Voltage Hook-up Diagrams

Wiring diagrams for connecting thermostat, air handler, and outdoor unit.

Electrical - High Voltage

High Voltage Power Supply

Guidance on matching high voltage power supply to equipment nameplate and codes.

High Voltage Disconnect Switch

Recommendation to install a separate disconnect switch at the outdoor unit.

High Voltage Ground

Requirement to ground the outdoor unit per national, state, and local codes.

System Start Up

System Start Up

Step-by-step procedure for safely starting up the system after installation.

System Charge Adjustment

Temperature Measurements

Instructions for checking outdoor and indoor temperatures for accurate charging.

Subcooling Charging in Cooling (Above 55° F Outdoor Temp.)

Method for adjusting system charge using subcooling above 55°F outdoor temp.

Subcooling Charging Below 55° F Outdoor Temp.

Recommended method for charging systems below 55°F outdoor temperature.

Checkout Procedures and Troubleshooting

Operational And Checkout Procedures

Final inspection list and procedures to ensure proper unit operation.

Troubleshooting

Table listing system faults, primary/secondary causes, and checks.

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