American Standard 4A7A6024 User Manual

© 2005 American Standard Inc. All Rights Reserved
Since the manufacturer has a policy of continuous product
and product data improvement, it reserves the right to
change design and specifications without notice.
11-AC16D1-3
IMPORTANT — This Document is customer property and is to remain with this unit. Please return to service information pack
upon completion of work.
These instructions do not cover all variations in systems
nor provide for every possible contingency to be met in
connection with installation. All phases of this installa-
tion must comply with NATIONAL, STATE AND LOCAL
CODES. 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.
A. GENERAL
The following instructions cover 4A7A6 Condensing Units. See
special wiring and sequence of operation on page 5.
NOTICE: These outdoor units may be used with indoor
units equipped with Thermostatic Expansion Valve only.
▲ WARNIN
G
:
These units use R-410A refrig-
erant which operates at 50% to 70% higher pressures than
R-22. Use only R-410A approved service equipment. Re-
frigerant cylinders are painted a “Rose” color to indicate
the type of refrigerant and may contain a “dip” tube to
allow for charging of liquid refrigerant into the system.
All R-410A systems use a POE oil that readily absorbs
moisture from the atmosphere. To limit this “hygroscopic”
action, the system should remain sealed whenever pos-
sible. Never break a vacuum with air and
always change
the driers when opening the system for component
replacement.
Check for transportation damage after unit is uncrated. Report
promptly, to the carrier, any damage found to the unit.
To determine the electrical power requirements of the unit, refer
to the nameplate of the unit. The electrical power available must
agree with that listed on the nameplate.
B. LOCATION & PREPARATION OF THE UNIT
1. When removing unit from the pallet, notice the tabs on the
basepan. Remove tabs by cutting with a sharp tool as shown in
Figure 2 (see page 2).
2. The unit should be set on a level support pad at least as large
as the unit base pan, such as a concrete slab. If this is not the
application used please refer to application bulletin
“ALG16-APG**-EN” (* denotes latest revision).
3. The support pad must NOT be in direct contact with any
structure. Unit must be positioned a minimum of 12" from any
wall or surrounding shrubbery to insure adequate airflow. Clear-
Condensing Units
Models:
4A7A6024,36,48, & 60B1000A
CAUTION
!
UNIT CONTAINS R-410A REFRIGERANT!
R-410A OPERATING PRESSURE EXCEEDS THE
LIMIT OF R-22. PROPER SERVICE EQUIPMENT IS
REQUIRED. FAILURE TO USE PROPER SERVICE
TOOLS MAY RESULT IN EQUIPMENT DAMAGE OR
PERSONAL INJURY.
SERVICE
USE ONLY R-410A REFRIGERANT AND
APPROVED POE COMPRESSOR OIL.
INSTALLER'S GUIDE
ALL phases of this installation must comply with NATIONAL, STATE AND LOCAL CODES
TOP DISCHARGE — UNRESTRICTED
5 FT. ABOVE UNIT
1

American Standard 4A7A6024 Specifications

General

Brand	American Standard
Model	4A7A6024
Category	Heat Pump
Language	English

Summary

Condensing Unit Installation Procedures

General Installation Guidelines

Covers general instructions and notices for installing 4A7A6 condensing units, including R-410A refrigerant precautions.

Unit Location and Preparation

Details requirements for unit placement, support pads, clearance from structures, and airflow.

Installing Refrigerant Lines

Provides guidance on routing, bending, securing, and insulating refrigerant tubing for installation.

Service Valve Operation

Explains the operation of brass liquid line service valves and warnings for R-410A systems.

Refrigerant System Handling and Evacuation

Brazing Refrigerant Lines

Instructions for brazing refrigerant lines, including precautions for valve cores and basepans.

Leak Check

Procedure for leak checking refrigerant lines and connections using nitrogen pressure.

System Evacuation

Steps for evacuating the refrigerant system to a specific micron level and charging with R-410A.

Electrical Connections and System Components

Electrical Connections

Guidelines for power wiring, grounding, disconnect switches, and low voltage wiring.

Electric Heaters

Instructions for installing electric heaters in the air handling device.

Start Control

Information on factory-installed or field-installed quick start components.

Outdoor Thermostat

Details on field installation of the TAYSTAT250A outdoor thermostat.

Seacoast Salt Shield

Note on the salt shield included with 4A7A6 models and its purpose.

Troubleshooting

A chart for diagnosing system faults related to refrigerant and electrical components.

Technical Drawings and Diagrams

Field Hook-Up Diagrams

Wiring diagrams for connecting 4A7A6 models to variable speed air handlers and furnaces.

Outline Drawing

Dimensional drawing of the 4A7A6 condensing unit with component locations and table of dimensions.

Mounting Hole Location

Detailed dimensions for mounting hole locations on the unit base.

System Checkout and Operation

Checkout Procedure

A checklist for verifying proper installation and operation of the entire HVAC system.