American Standard 2A7C3000A

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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-AC19D1-1

These instructions do not cover all variations in systems nor

provide for every possible contingency to be met in connec-

tion with installation. All phases of this installation must

comply with NATIONAL, STATE AND LOCAL CODES.

Should further information be desired or should particular prob-

lems 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

▲ WARNING:

This information is intended

for use by individuals possessing adequate backgrounds of

electrical and mechanical experience. Any attempt to

repair a central air conditioning product may result in

personal injury and or property damage. The manufac-

turer or seller cannot be responsible for the interpretation

of this information, nor can it assume any liability in

connection with its use.

NOTE: AMERICAN STANDARD HAS ALWAYS RECOM-

MENDED INSTALLING AMERICAN STANDARD AP-

PROVED MATCHED INDOOR AND OUTDOOR SYSTEMS.

THE BENEFITS OF INSTALLING APPROVED MATCHED

SYSTEMS ARE MAXIMUM EFFICIENCY, OPTIMUM PER-

FORMANCE AND BEST OVERALL SYSTEM RELIABILITY.

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 AND 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 reference ALG-APG0*-EN (*latest revi-

sion number).

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-

ance must be provided in front of control box (access panels) & any

other side requiring service access to meet National Electrical

Code. Also, the unit location must be far enough away from any

structure to prevent excess roof run-off water from pouring directly

on the unit. When choosing the location of the unit(s), sound

transmission through air and refrigerant lineset should be taken

into consideration. It is recommended to locate unit(s) away from

areas (bedrooms, etc.) where such sound could be objectionable.

4. The top discharge area must be unrestricted for at least five (5)

feet above the unit.

5. When the outdoor unit is mounted on a roof, be sure the roof will

support the unit’s weight. Properly selected isolation is recom-

mended to prevent transmission to the building structure.

6. The maximum length of refrigerant lines from outdoor to

indoor unit should NOT exceed sixty (60) feet.

7. If outdoor unit is mounted above the air handler, maximum lift

should not exceed sixty (60) feet (suction line). If air handler is

mounted above condensing unit, maximum lift should not exceed

sixty (60) feet (liquid line).

Condensing Units

INSTALLER'S GUIDE

ALL phases of this installation must comply with NATIONAL, STATE AND LOCAL CODES

5 FT. ABOVE UNIT — UNRESTRICTED

Models:

2A7C3030-060A3/4000A

IMPORTANT — This Document is customer property and is to remain with this unit. Please return to service information pack

upon completion of work.

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This document describes the American Standard 2A7C3030-060A3/4000A series of outdoor condensing units, which are designed for use with an indoor air handler or furnace to provide cooling for residential and light commercial applications.

Function Description

The condensing unit is a key component of a split-system air conditioning or heat pump system. Its primary function is to reject heat from the refrigerant to the outdoor air, thereby cooling the indoor space. When paired with an appropriate indoor coil and air handler, these units provide efficient cooling. The variable speed models offer enhanced comfort and energy efficiency by adjusting their operation to match the cooling demand.

Important Technical Specifications

The models covered are 2A7C3030-060A3 and 2A7C3042-060A3, among others in the 2A7C30 series. These units are designed for outdoor installation.

Refrigerant: The units use R-410A refrigerant. Electrical Supply: The electrical supply requirements vary by model, but generally fall within the 24V AC range for control circuits and higher voltages for the main power supply. For example, 18 AWG wire is specified for 150 ft, 16 AWG for 225 ft, and 14 AWG for 300 ft for the 24V circuit. Dimensions: Refer to the "2A7C3 Outline Drawing" for detailed dimensions. For instance, the 2A7C3030A model has a base width of 829 (32-3/4 inches) and a height of 756 (29-3/4 inches). The top discharge area should be unobstructed for at least five feet above the unit. Sound Levels: The units are designed to operate quietly. The location of the unit, especially its proximity to sound transmission paths like windows or patios, should be considered during installation to minimize noise impact. Subcooling Charging: The manual provides detailed tables for subcooling charging based on outdoor liquid temperature and total refrigerant line length. For example, at 80°F outdoor liquid temperature and 10 feet of total refrigerant line length, the liquid pressure should be 163 psi.

Usage Features

Installation:

Location: The unit must be installed outdoors on a level, firm pad, at least 12 inches from any wall or surrounding shrubbery to ensure adequate airflow. The top discharge area requires at least 5 feet of unobstructed space above the unit. For optimal sound performance, avoid placing the unit directly under windows or near patios.
Mounting: The mounting hole locations are provided in the "Mounting Hole Location" diagram.
Refrigerant Lines: The liquid and gas line service valves are equipped with pressure tap ports for easy charging and maintenance. The manual specifies the correct procedures for connecting refrigerant lines, including brazing techniques and pressure testing.
Electrical Connections: All wiring must comply with NATIONAL, STATE, AND LOCAL CODES. The unit requires a separate disconnect switch at the outdoor unit.
Thermostat: The unit is compatible with the BAYSTAT250B outdoor thermostat, which is described in the wiring diagram.

Operation:

Defrost Control: The unit includes a defrost control system that monitors outdoor ambient temperature and coil temperature to prevent ice buildup on the outdoor coil during heating operation (if applicable).
Compressor Start-up: The manual outlines the sequence for compressor start-up, including the initial 60-second delay to prevent short cycling.

Maintenance Features

Leak Check:

Importance: Regular leak checks are crucial for maintaining system efficiency. The manual recommends using soap bubbles or other leak-checking methods to identify leaks in the refrigerant system.
Procedure: After brazing operations, the refrigerant lines must be pressure tested with dry nitrogen to 350-375 psi.

Refrigerant Charging:

Procedure: The manual provides detailed instructions for charging the unit, emphasizing the use of the subcooling method. It includes tables to determine the correct subcooling values based on outdoor liquid temperature and total refrigerant line length.
Warning: Overcharging or undercharging can lead to reduced performance and potential compressor damage.

Service Valves:

Function: The liquid and gas line service valves are designed for easy access to the refrigerant system for charging, evacuation, and pressure testing.
Operation: The manual describes how to open and close these valves using a 1/4" square drive wrench.

Troubleshooting:

Troubleshooting Chart: A comprehensive troubleshooting chart is provided to help diagnose common system faults, including issues with refrigerant circuits, electrical components, and compressor operation.
Error Codes: The unit's control board may flash LED codes to indicate specific faults, aiding in diagnosis. For example, a rapidly flashing LED indicates a normal operation mode, while a slowly flashing LED indicates a fault.
Pin Identification (PIN ID): The control board includes a PIN ID feature that can help diagnose issues by indicating which pins are active or inactive.

General Maintenance:

Cleaning: The outdoor coil should be kept clean to ensure optimal airflow and heat transfer.
Insulation: All refrigerant lines should be properly insulated to prevent energy loss.
Wiring: All electrical connections should be checked periodically for tightness and corrosion.

Important Notes:

Always refer to the latest revision of the manual for the most up-to-date information.
Only qualified personnel should perform installation and service procedures.
The manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.