Trane A4AC3042A1000A 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 A4AC3042A1000A Specifications

General

Model Number	A4AC3042A1000A
Category	Heat Pump
Cooling Capacity (tons)	3.5
SEER Rating	14
Refrigerant Type	R-410A
Voltage (V)	208/230
Phase	1
Sound Level	74 dB
Compressor Type	Scroll
Stages	Single
Cooling Capacity (BTU/h)	42, 000

Summary

Section 1. Safety

General Safety Warnings

Important safety guidelines and warnings regarding installation and servicing of HVAC equipment.

Section 5. Refrigerant Line Considerations

Refrigerant Line and Service Valve Connection Sizes

Table detailing line sizes and service valve connection sizes for different models.

Section 7. Refrigerant Line Brazing

Braze The Refrigerant Lines

Step-by-step instructions for preparing and brazing refrigerant lines to service valves.

Section 8. Refrigerant Line Leak Check

Check For Leaks

Procedure to pressurize and check refrigerant lines for leaks using soapy solution.

Section 9. Evacuation

Evacuate the Refrigerant Lines and Indoor Coil

Steps for evacuating the system to achieve a proper vacuum level.

Section 10. Service Valves

Open the Gas Service Valve

Open the Liquid Service Valve

Procedure and safety warning for opening the liquid service valve.

Section 12. Electrical – High Voltage

High Voltage Power Supply

Section 13. Start Up

System Start Up

Step-by-step procedure for powering up and starting the system after installation.

Section 14. System Charge Adjustment

Subcooling Charging in Cooling (Above 55° F Outdoor Temp.)

Method for adjusting system charge using subcooling for outdoor temps above 55°F.

Subcooling Charging Below 55° F Outdoor Temp.

Calculating Charge Using the Weigh-In Method

Section 15. Checkout Procedures and Troubleshooting

Operational And Checkout Procedures

List of final checks to ensure proper system operation and installation.

Troubleshooting System Faults

Guides for diagnosing and resolving common system faults, including flowcharts and fault tables.