American Standard 4A6H5024H User Manual

11-BC26D1-11-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.
Heat Pumps
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.
4A6H5
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 ..................................................... 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 ................................................... 14
Section 13. Start Up .............................................................................. 15
Section 14. System Charge Adjustment ............................................. 16
Section 15. Checkout Procedures and Troubleshooting ................... 23

American Standard 4A6H5024H Specifications

General

Brand	American Standard
Model	4A6H5024H
Category	Heat Pump
Language	English

Summary

Section 1. Safety

Section 5. Refrigerant Line Considerations

5.3 Required Refrigerant Line Length

Section 6. Refrigerant Line Routing

6.1 Precautions

Details how to route refrigerant lines to prevent noise transmission and comply with codes, including isolation.

Section 7. Refrigerant Line Brazing

7.1 Braze The Refrigerant Lines

Provides step-by-step instructions for preparing and brazing refrigerant lines to service valves.

Section 8. Refrigerant Line Leak Check

8.1 Check For Leaks

Explains how to pressurize lines with nitrogen and check for leaks using a soapy solution.

Section 9. Evacuation

9.1 Evacuate the Refrigerant Lines and Indoor Coil

Details the process of evacuating the system using a micron gauge to remove air and moisture.

Section 10. Service Valves

10.1 Open the Gas Service Valve

10.1 Open the Liquid Service Valve

Section 13. Start Up

13.1 System Start Up

Details the sequence of steps for safely powering up and starting the HVAC system.

Section 14. System Charge Adjustment

14.1 Temperature Measurements

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

Describes the subcooling method for charging in cooling mode when ambient temperature is above 55°F.

14.3 Subcooling Charging Below 55° F Outdoor Temp. (In Heating Only)

Details using the weigh-in method for charging in heating mode at temperatures below 55°F outdoor.

Section 15. Checkout Procedures and Troubleshooting

15.1 Operational And Checkout Procedures

Lists essential checks to perform after installation to ensure proper operation and system integrity.

15.2 Troubleshooting

Provides a fault chart correlating system faults with potential causes for diagnosis.