Trane A4AC3018A1000A User Manual

Installer’s Guide
April 2020
88-A4AC3001-1C-EN
SAFETY WARNING
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 pre-
cautions in the literature and on the tags, stickers, and labels that are attached to the equipment.
Models
A4AC3018A1000A
A4AC3023A1000A
A4AC3024A1000A
A4AC3029A1000A
A4AC3030A1000A
A4AC3036A1000A
A4AC3042A1000A
A4AC3043A1000A
A4AC3048A1000A
A4AC3060A1000A
Note: “Graphics in this document are for representation only.
Actual model may differ in appearance.”
Condensing Units

Trane A4AC3018A1000A Specifications

General

Model	A4AC3018A1000A
Type	Heat Pump
Cooling Capacity (BTU)	18000
SEER Rating	14
HSPF Rating	8.2
Refrigerant	R-410A
Voltage	208/230
Phase	1
Unit Weight (lbs)	150

Summary

Installer's Guide - Introduction and General Safety

General Safety Warnings

Covers qualifications, R-410A refrigerant, electrical hazards, and California Prop 65.

High Voltage Power Supply Safety

Focuses on high voltage power supply safety, nameplate, and codes.

Unit Location and Preparation

Unit Dimensions and Refrigerant Piping Limits

Details unit dimensions, weight, and refrigerant line length/vertical change limits.

Installation Location Guidelines

Provides clearance, noise, cold climate, and airflow advice for unit placement.

Unit Preparation and Pad Installation

Covers pre-installation checks, damage reporting, and support pad requirements.

Refrigerant Line Installation and Charging

Refrigerant Line Sizing, Routing, and Insulation

Specifies line sizes, valve connections, routing precautions, and insulation needs.

Refrigerant Line Brazing and Leak Checking

Outlines steps for brazing refrigerant lines and performing leak checking.

Evacuation and Service Valve Operation

Explains vacuum evacuation process and how to open gas/liquid service valves.

System Charge Adjustment Methods

Details temperature measurements, subcooling, and superheat charging procedures.

Electrical System Installation

Low Voltage Wiring and Hook-up Diagrams

Covers low voltage wire length limits and system wiring hook-up diagrams.

High Voltage Power and Grounding

Describes high voltage disconnect switch installation and proper grounding.

System Startup, Checkout, and Troubleshooting

System Startup Procedures

Step-by-step guide for powering up the unit and setting the thermostat.

Operational Checkout Procedures

A checklist of final inspection and operational checks before system use.

Troubleshooting Common Issues

Guides for diagnosing and resolving compressor start/run failures and system faults.

Refrigerant Circuit Diagrams

Refrigerant Flow for 1.5-3.5 Ton Units

Illustrates refrigerant flow for 1.5, 2, 2.5, and 3.5 ton unit configurations.

Refrigerant Flow for 3-5 Ton Units

Illustrates refrigerant flow for 3, 4, and 5 ton unit configurations.