American Standard 4A6H5 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 4A6H5 Specifications

General

Brand	American Standard
Model Number	4A6H5
Type	Heat Pump
SEER Rating	Up to 16
Refrigerant	R-410A
Voltage	208/230 V
Phase	1
Cooling Capacity	18, 000 - 60, 000 BTU/h
Heating Capacity	18, 000 - 60, 000 BTU/h
Noise Level	72 dB
Compressor Type	Single-Stage

Summary

Section 1. Safety

Section 2. Unit Location Considerations

2.1 Unit Dimensions and Weight

Details unit dimensions and weight for installation planning.

2.2 Refrigerant Piping Limits

Outlines maximum total and vertical refrigerant line lengths.

2.3 Suggested Locations for Best Reliability

Recommends optimal placement to ensure airflow and reliability.

2.4 Cold Climate Considerations

Provides guidance for installations in cold weather conditions.

2.5 Coastal Considerations

Advises on protection for units near salt water.

Section 3. Unit Preparation

3.1 Prepare The Unit For Installation

Describes initial steps for preparing the unit before installation.

Section 4. Setting the Unit

4.1 Pad Installation

Details requirements for proper support pad installation.

Section 5. Refrigerant Line Considerations

5.1 Refrigerant Line and Service Valve Connection Sizes

Lists line sizes and service valve connection diameters by model.

5.2 Factory Charge

Explains the factory refrigerant charge for the unit.

5.3 Required Refrigerant Line Length

Prompts for recording total line length and vertical change.

5.4 Refrigerant Line Insulation

Emphasizes the importance of insulating the vapor line.

5.5 Reuse Existing Refrigerant Lines

Provides precautions for using existing refrigerant lines.

Section 6. Refrigerant Line Routing

6.1 Precautions

Details how to route refrigerant lines to prevent noise and comply with codes.

Section 7. Refrigerant Line Brazing

7.1 Braze The Refrigerant Lines

Step-by-step guide for 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.

Section 9. Evacuation

9.1 Evacuate the Refrigerant Lines and Indoor Coil

Details the process of evacuating the system using a micron gauge.

Section 10. Service Valves

10.1 Open the Gas Service Valve

Instructions for safely opening the gas service valve.

10.1 Open the Liquid Service Valve

Instructions for safely opening the liquid service valve.

Section 11. Electrical - Low Voltage

11.1 Low Voltage Maximum Wire Length

Provides maximum wire lengths based on AWG size for low voltage.

11.2 Low Voltage Hook-up Diagrams

Illustrates thermostat and unit wiring connections.

11.3 Defrost Control

Explains defrost control settings and operation.

Section 12. Electrical - High Voltage

12.1 High Voltage Power Supply

Covers requirements for high voltage power supply compliance.

12.2 High Voltage Disconnect Switch

Details the installation of a separate disconnect switch.

12.3 High Voltage Ground

Specifies requirements for grounding the outdoor unit.

Section 13. Start Up

13.1 System Start Up

Outlines the sequence for powering up and starting the system.

Section 14. System Charge Adjustment

14.1 Temperature Measurements

Explains the temperature measurements needed for charging.

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

Details the subcooling method for charging above 55°F.

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

Describes weighing-in charge in heating mode for low temps.

Section 15. Checkout Procedures and Troubleshooting

15.1 Operational And Checkout Procedures

Lists procedures for final system checks after installation.

15.2 Troubleshooting

Provides a fault guide for diagnosing system issues.