American Standard Link 4A6V8X48A1000A 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.
August 2022
1111--BBCC4455DD11--11CC--EENN
American Standard Link or AccuLink™™
Variable Speed Heat Pumps and Air Conditioners
4A6V8X24A1000A
4A6V8X36A1000A
4A6V8X48A1000A
4A6V8X60A1000A
4A7V8X24A1000A
4A7V8X36A1000A
4A7V8X48A1000A
4A7V8X60A1000A
TM
The Diagnostics Mobile App is available by scanning a QR code
located inside this unit or by searching for the Link Diagnostics App
in your App Store
® .
NNoottee:: “Graphics in this document are for representation only. Actual
model may differ in appearance.”
NNoottee:: This unit can be used in AccuLink
™ mode or American Standard
Link mode.
Installer’s Guide

American Standard Link 4A6V8X48A1000A Specifications

General

Brand	American Standard
Model	Link 4A6V8X48A1000A
Category	Air Conditioner
Language	English

Summary

Installer's Guide - Initial Safety

Initial Safety Warning

A primary safety alert presented on the title page of the guide.

Comprehensive Safety Section

Hazardous Voltage and Electrical Safety

Precautions for high voltage and electrical hazards during service.

Refrigerant and Oil Handling Safety

Guidelines for safe handling of refrigerants and system oils.

Equipment Operation Safety

Safety measures for hot surfaces, grounding, and service valve operations.

Brazing and Leak Prevention Safety

Safety requirements for brazing connections and ensuring leak-free systems.

High Leakage Current Warning

Alert about high leakage current and essential earth connection.

Electrical Safety and System Compatibility

400 Volts Electrical Hazard Alert

Specific warning about 400VDC electrical hazards and waiting periods.

Approved Unit Combinations

Unit Preparation and Installation Setup

Initial Unit Preparation Steps

Outdoor Unit Pad Installation

Refrigerant Line System Setup

Refrigerant Line Length and Lift Requirements

Refrigerant Line Routing and Isolation

Refrigerant Line Routing Precautions

Refrigerant Line Brazing Procedure

Steps for Brazing Refrigerant Lines

Detailed instructions for preparing and brazing refrigerant lines.

Refrigerant Line Integrity Checks

Leak Checking Refrigerant Lines

Procedure for pressurizing and checking refrigerant lines for leaks.

Evacuating Refrigerant Lines and Coil

Service Valve Operations

Opening the Gas Service Valve

Opening the Liquid Service Valve

Low Voltage Electrical Connections

Fully Communicating System Wiring Diagram

High Voltage Electrical Connections

High Voltage Power Supply Requirements

High Voltage Disconnect Switch Installation

System Start-Up Procedure

System Charge Adjustment

Temperature Measurements for Charging

Subcooling Charging Correction Calculations

Worksheet and method for correcting subcooling based on line length/lift.

Subcool Charging Correction Charts

R-410A Refrigerant Charging Chart

Unit Charging Process

Setting Proper Gage Pressure

Procedure for adjusting refrigerant to match target gage pressure.

System Stabilization and Verification

Steps to stabilize the system and verify performance after charging.

Heating Mode Charging Below 55°F

Defrost Control for Heat Pumps

Installation Checkout Procedures