American Standard 4A7L5048N1000A User Manual

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Only qualified personnel should install and service the equipment. The installation, starting up, and servicing of heating, ventilating, and air-conditioning
equipment can be hazardous and requires specific knowledge and training. Improperly installed, adjusted or altered equipment by an unqualified person
could result in death or serious injury. When working on the equipment, observe all precautions in the literature and on the tags, stickers, and labels that
are attached to the equipment.
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Side Discharge AC Models
For coastal applications where units are installed within one (1) mile of salt water, epoxy coated models are recommended. These models
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Installation and Operation Manual

American Standard 4A7L5048N1000A Specifications

General

Model Number	4A7L5048N1000A
Brand	American Standard
Category	Air Conditioner
Type	Split System
Refrigerant Type	R-410A
Voltage	208/230V
Phase	1
HSPF	Not Applicable
Stages	1
SEER Rating	16
Compressor Type	Single Stage

Summary

Safety Section

Hazardous Voltage Warning

Warning regarding potential property damage, severe personal injury, or death from electrical hazards.

Refrigerant Oil Handling

Precautions for R-410A refrigerant oil, its properties, and handling requirements.

Hot Surface Caution

Warning about potential burns from touching hot surfaces like the compressor.

Refrigerant Handling Precautions

Cautionary advice on handling systems containing refrigerant and oil under pressure.

Grounding Requirements

Importance of proper grounding for safety and equipment protection.

Service Valve Operation

Brazing and Leak Testing

Refrigerant Line Brazing

Brazing Refrigerant Lines

Refrigerant Line Leak Checks and Evacuation

Refrigerant Line Leak Check

Refrigerant Line Evacuation

Service Valve Operations

Opening Gas Service Valve

Opening Liquid Service Valve

Electrical Systems Overview

Low Voltage Wiring Specifications

High Voltage Power Supply

High Voltage Disconnect Switch

System Start Up and Charging Procedures

System Start Up Procedure

Steps for setting thermostat, applying power, and waiting for stabilization before operation.

Subcooling Charging Method

Recommended subcooling method for charging above 55°F ambient temperatures.

System Charge Adjustment

Worksheet for determining final subcooling value with line length and lift corrections.

Refrigerant Charging Chart

Table of liquid gauge pressure values based on liquid temperature and design subcooling.

Subcool Charging Charts

Charts providing subcooling corrections based on line length and lift for different ton models.

Stabilizing and Verifying Charge

Procedures for stabilizing the system and verifying proper charge using pressure curves.

Checkout Procedures

Final Installation Checklist

A comprehensive list of checks to ensure proper installation and system function.

Wiring Diagrams

Diagrams for 2.0, 2.5, and 3.0 Ton Models

Diagrams for 3.5 and 4.0 Ton Models

Pressure Curves

Pressure Curves for 2.0 and 2.5 Ton Models

Pressure Curves for 3.0 Ton Models

Pressure Curves for 3.5 and 4.0 Ton Models