Trane A4AC4048A1000A User Manual

Installer’s Guide
October 2020
88-A4AC4001-1D-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
A4AC4018B1000A
A4AC4023A1000A
A4AC4024A1000A
A4AC4030B1000A
A4AC4036A1000A
A4AC4042A1000A
A4AC4048A1000A
A4AC4060A1000A
Note: “Graphics in this document are for representation only.
Actual model may differ in appearance.”
Condensing Units

Trane A4AC4048A1000A Specifications

General

Brand	Trane
Model	A4AC4048A1000A
Category	Heat Pump
Language	English

Summary

Section 1. Safety

General Safety Warnings

Covers hazards of high refrigerant pressures, live electrical components, hot compressor domes, and valve service.

Section 7. Refrigerant Line Brazing

Braze The Refrigerant Lines

Step-by-step instructions for brazing refrigerant lines, including preparation.

Section 8. Refrigerant Line Leak Check

Check For Leaks

Procedure for pressurizing lines with nitrogen and checking for leaks with soapy solution.

Section 9. Evacuation

Evacuate the Refrigerant Lines and Indoor Coil

Section 11. Electrical - Low Voltage

Low Voltage Hook-up Diagrams

Section 12. Electrical - High Voltage

High Voltage Power Supply

Section 13. Start Up

System Start Up

Step-by-step procedure for starting up the system, including thermostat settings and wait times.

Section 14. System Charge Adjustment

Temperature Measurements

Subcooling Charging in Cooling

Method for subcooling charging in cooling mode above 55°F outdoor temperature.

Determine Final Subcooling Value

Charts and steps to determine final subcooling value using line length and lift.

Measure and Determine Liquid Gage Pressure

Steps to measure liquid line temperature/pressure and use charts to find proper gage pressure.

Adjust Refrigerant Level

Procedures for adding or recovering refrigerant to match charging chart values.

System Stabilization After Adjustments

Verify Typical Performance

Section 15. Checkout Procedures and Troubleshooting

Operational And Checkout Procedures

Checklist of operational and checkout procedures after installation.

Troubleshooting - Compressor Fails to Start

Flowchart for diagnosing compressor start failures, including contactor checks.

Troubleshooting - Compressor Won't Run

Flowchart for diagnosing compressor run failures, including voltage and capacitor checks.