Trane 4TWX8060A User Manual

18-BC91D1-6B-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.
Condensing Units
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.
4TWX8
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 4TWX8060A Specifications

General

Brand	Trane
Model	4TWX8060A
Category	Heat Pump
Language	English

Summary

Section 1. Safety

Unit and Refrigerant Safety

Covers warnings for R-410A refrigerant, high pressures, POE oil, and valve handling.

Electrical Safety

Emphasizes precautions when working with live electrical components to prevent severe injury or death.

Section 8. Refrigerant Line Leak Check

Check For Leaks

Steps to pressurize lines with nitrogen and check for leaks using soapy solution.

Section 9. Evacuation

Evacuate the Refrigerant Lines and Indoor Coil

Steps for evacuating the system to a specific micron level for proper operation.

Section 13. Start Up

System Start Up

Step-by-step procedure for safely starting up the installed system.

Section 14. System Charge Adjustment

Temperature Measurements

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

Step 1: Gathering refrigerant line total length and lift measurements.

Subcooling Charging Calculations

Step 2: Using charts to determine final subcooling value based on line length and lift.

System Stabilization for Charging

Measure Liquid Line Parameters

Step 4: Measuring liquid line temperature and pressure at the outdoor unit's service valve.

Determine Gage Pressure from Chart

Step 5: Using Table 14.2 to find proper liquid gage pressure based on subcooling and temp.

Adjust Refrigerant Level

Step 6: Adding or recovering refrigerant to match chart values for proper charge.

Stabilize System After Adjustment

Verify Typical Performance

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

Determine Additional Charge (Weigh-In Method)

Steps for calculating additional charge using the weigh-in method for heating mode.

Stabilize System for Heating Charge

Check Heating Mode Parameters

Adjust Charge for Heating Mode

Step 4: Adding charge if 10° subcooling is not met with nameplate charge.

Section 15. Checkout Procedures and Troubleshooting

Operational And Checkout Procedures

Final inspection checklist for operational readiness and performance verification.

Troubleshooting System Faults

Table detailing system faults, primary and secondary causes, and checks for various modes.