Trane 4TWX7024E User Manual

18-BC109D1-1A-EN
ALL phases of this installation must comply with NATIONAL, STATE AND LOCAL CODES
IMPORTANT — This Document is customer property and is to remain with this unit. Please return to service informa-
tion pack upon completion of work.
Heat Pumps
These instructions do not cover all variations in systems or provide for every possible contingency to be met in connection with
the installation. Should further information be desired or should particular problems arise which are not covered sufficiently for the
purchaser’s purposes, the matter should be referred to your installing dealer or local distributor.
Note: The manufacturer recommends installing only approved matched indoor and outdoor systems. All of the manufacture’s split
systems are AHRI rated only with TXV/EEV indoor systems. Some of the benefits of installing approved matched indoor and out-
door split systems are maximum efficiency, optimum performance and the best overall system reliability.
4TWX7
Installer’s Guide
Table of Contents
Section 1. Safety ..................................................................................... 2
Section 2. Unit Location Considerations ............................................. 3
Section 3. Unit Preparation.................................................................... 5
Section 4. Setting the Unit ..................................................................... 5
Section 5. Refrigerant Line Considerations ......................................... 6
Section 6. Refrigerant Line Routing ..................................................... 8
Section 7. Refrigerant Line Brazing ...................................................... 9
Section 8. Refrigerant Line Leak Check ............................................. 11
Section 9. Evacuation .......................................................................... 12
Section 10. Service Valves .................................................................. 12
Section 11. Electrical - Low Voltage ................................................... 13
Section 12. Electrical - High Voltage .................................................. 15
Section 13. Start Up.............................................................................. 16
Section 14. System Charge Adjustment............................................. 17
Section 15. Checkout Procedures and Troubleshooting .................. 23

Trane 4TWX7024E Specifications

General

Model	4TWX7024E
Type	Heat Pump
SEER Rating	16
HSPF Rating	9.0
Refrigerant	R-410A
Voltage	208/230V
Phase	1
Cooling Capacity	24, 000 BTU/h
Heating Capacity	24, 000 BTU/h
Compressor Type	Scroll

Summary

Section 1. Safety

Section 5. Refrigerant Line Considerations

5.1 Refrigerant Line and Service Valve Connection Sizes

5.3 Required Refrigerant Line Length

Section 7. Refrigerant Line Brazing

7.1 Braze The Refrigerant Lines

Details the step-by-step procedure for brazing refrigerant lines.

Section 8. Refrigerant Line Leak Check

8.1 Check For Leaks

Describes the process of pressurizing lines and checking for leaks.

Section 9. Evacuation

9.1 Evacuate the Refrigerant Lines and Indoor Coil

Explains the procedure for evacuating the system to a specific micron level.

Section 11. Electrical - Low Voltage

11.1 Low Voltage Maximum Wire Length

11.2 Low Voltage Hook-up Diagrams

Illustrates wiring connections for thermostats and air handlers.

11.3 Defrost Control

Section 12. Electrical - High Voltage

12.1 High Voltage Power Supply

12.2 High Voltage Disconnect Switch

12.3 High Voltage Ground

Section 13. Start Up

13.1 System Start Up

Section 14. System Charge Adjustment

14.1 Temperature Measurements

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

Explains the subcooling method for charging in cooling mode above 55°F.

14.3 Subcooling Charging Below 55° F Outdoor Temp. (In Heating Only)

Describes the weigh-in method for charging below 55°F outdoor temperature in heating mode.

Section 15. Checkout Procedures and Troubleshooting

15.1 Operational And Checkout Procedures

Lists final inspection points and operational checks after installation.

15.2 Troubleshooting

Provides a guide to diagnosing and resolving common system faults.