American Standard 4A6H6 User Manual

11-BC39D1-1E-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 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.
4A6H6
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 ...................................................... 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
Section 15. Checkout Procedures and Troubleshooting .................. 25

American Standard 4A6H6 Specifications

General

Brand	American Standard
Model	4A6H6
Category	Heat Pump
Language	English

Summary

Safety Precautions and Warnings

Electrical Component Safety

Warns about hazards associated with live electrical components during installation and servicing.

R-410A Refrigerant Handling Guidelines

Details safety precautions for R-410A refrigerant and POE oil.

Service Valve Operation Caution

Advises caution when opening the liquid line service valve to prevent injury.

Unit Location and Site Considerations

Unit Dimensions and Weight Specifications

Provides dimensions and estimated weights for various outdoor unit models.

Refrigerant Piping Length and Vertical Limits

Specifies maximum allowable refrigerant line lengths and vertical changes.

Optimal Placement for Reliability

Recommends optimal placement for unit airflow, sound, and protection.

Environmental Installation Factors

Provides precautions for cold climates and coastal installations.

Unit Preparation and Installation Setup

Pre-Installation Unit Inspection

Details the steps for inspecting and preparing the unit before installation.

Support Pad Installation Requirements

Outlines requirements for installing the unit on a support pad.

Refrigerant Line Installation and Management

Refrigerant Line Sizing and Connections

Details line and valve connection sizes for various models.

Refrigerant Line Insulation and Routing

Emphasizes insulating the vapor line and proper routing to prevent noise.

Refrigerant Line Brazing Procedure

Guides through the steps of brazing refrigerant lines with nitrogen purge.

System Integrity Checks

Refrigerant Line Leak Detection

Details the procedure for checking refrigerant lines for leaks using nitrogen.

System Evacuation Process

Explains how to evacuate refrigerant lines and indoor coil to a specific micron level.

Service Valve Procedures

Opening Gas and Liquid Service Valves

Describes procedures and safety for opening gas and liquid service valves.

Electrical Wiring and Connections

Low Voltage Wiring Diagrams and Limits

Provides wiring diagrams and maximum wire lengths for low voltage connections.

High Voltage Power Supply and Grounding

Covers high voltage power supply, disconnect switches, and grounding requirements.

System Start-Up and Refrigerant Charging

System Initial Start-Up

Outlines the steps for powering up and starting the system.

Subcooling Charging Method (Cooling)

Details subcooling method for charging in cooling mode above 55°F.

Weigh-In Charging Method (Heating)

Explains weighing-in charge for heating mode below 55°F.

Final Installation Checks and Troubleshooting

Operational Checkout Checklist

Lists final checks for proper operation and installation completion.

System Faults Troubleshooting Guide

Provides a system faults table to diagnose issues.