Trane 4TWR4036N User Manual

18-BC95D1-5E-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
4TWR4
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.
Installation and Operation Manual
Table of Contents
Section 1. Safety ..................................................................................... 2
Section 2. Unit Location Considerations ............................................. 4
Section 3. Unit Preparation .................................................................... 5
Section 4. Setting the Unit ..................................................................... 5
Section 5. Refrigerant Line Considerations ......................................... 5
Section 6. Refrigerant Line Routing ..................................................... 6
Section 7. Refrigerant Line Brazing ...................................................... 8
Section 8. Refrigerant Line Leak Check ............................................... 8
Section 9. Evacuation ............................................................................ 9
Section 10. Service Valves .................................................................... 9
Section 11. Electrical - Low Voltage ................................................... 10
Section 12. Electrical - High Voltage .................................................. 11
Section 13. Start Up .............................................................................. 12
Section 14. System Charge Adjustment ............................................. 12
Section 15. Checkout Procedures ...................................................... 16
Section 16. Defrost Control ................................................................. 17
Section 17. Troubleshooting ............................................................... 20
Section 18. Wiring Diagrams ............................................................... 22
Section 19. Pressure Curves ............................................................... 25
Section 20. Refrigerant Circuit ............................................................ 30

Trane 4TWR4036N Specifications

General

Model	4TWR4036N
Type	Heat Pump
SEER Rating	16
Refrigerant	R-410A
Voltage	208/230V
Phase	1
Cooling Capacity	36000 BTU/h
Heating Capacity	36000 BTU/h
Compressor Type	Scroll
Operating Temperature Range (Heating)	-5°F to 65°F

Summary

Section 1. Safety

Electrical and Voltage Safety

Warnings about live electrical components, hazardous voltage, and grounding requirements.

Refrigerant and Oil Handling Safety

Precautions for R-410A refrigerant, POE oil, service valves, and hot surfaces.

Section 5. Refrigerant Line Considerations

Section 7. Refrigerant Line Brazing

Brazing Procedures

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

Section 8. Refrigerant Line Leak Check

Leak Detection Methods

Procedure for pressurizing lines and checking for leaks using a soapy solution.

Section 9. Evacuation

System Evacuation Procedure

Section 11. Electrical - Low Voltage

Low Voltage Wiring Diagrams

Diagrams and specifications for low voltage wiring, including wire length limits.

Section 12. Electrical - High Voltage

High Voltage Power Supply

Section 13. System Start Up

System Start Up Procedures

Step-by-step guide for initial system startup after installation.

Section 14. System Charge Adjustment

Subcooling Charging Method

Method for charging the system using subcooling, with correction tables for line length and lift.

Charging Chart and Adjustments

Using the R-410A charging chart to determine final subcooling and adjust refrigerant level.

Subcooling Charging Charts

Section 15. Checkout Procedures

Final Checkout Procedures

Section 16. Defrost Control

Section 17. Troubleshooting

Compressor Start Troubleshooting

Flowchart for diagnosing compressor start failures, including contactor and voltage checks.

Compressor Not Running Troubleshooting

Flowchart for diagnosing compressor failures, including voltage, overload, and start component checks.

Outdoor TXV/Heating Mode Troubleshooting

Section 18. Wiring Diagrams

Wiring Diagram (017N, 042N, 048N & 060N Models)

Wiring Diagram (018N, 024N, 030N & 036N Models)