Trane 4TTR4018L User Manual

18-AC51D1-8-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 A.H.R.I. rated only with TXV/EEV indoor systems. Some of the benefits of installing approved matched indoor and
outdoor split systems are maximum efficiency, optimum performance and the best overall system reliability.
4TTR4
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 ..................................................... 7
Section 7. Refrigerant Line Brazing ...................................................... 8
Section 8. Refrigerant Line Leak Check ............................................. 10
Section 9. Evacuation ........................................................................... 11
Section 10. Service Valves ................................................................... 11
Section 11. Electrical - Low Voltage .................................................... 13
Section 12. Electrical - High Voltage ................................................... 16
Section 13. Start Up .............................................................................. 17
Section 14. System Charge Adjustment ............................................. 18
Section 15. Checkout Procedures and Troubleshooting ................... 22

Trane 4TTR4018L Specifications

General

Brand	Trane
Model	4TTR4018L
Category	Heat Pump
Language	English

Summary

Safety Precautions

Refrigerant Line Handling

Refrigerant Line Brazing

Braze The Refrigerant Lines

Details steps for preparing, purging, brazing refrigerant lines, and installing filter driers.

Refrigerant Line Leak Check and Evacuation

Check For Leaks

Outlines pressurizing the system with nitrogen and checking for leaks using a soap solution.

Evacuate the Refrigerant Lines and Indoor Coil

Explains evacuating the system to a specific micron level and verifying it.

Electrical - High Voltage

High Voltage Power Supply

Emphasizes matching power supply to the nameplate and complying with codes.

High Voltage Disconnect Switch

High Voltage Ground

System Start Up

System Start Up

Details the sequence for powering up the system and setting the thermostat.

System Charge Adjustment

Temperature Measurements

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

Explains the subcooling method for charging the system in cooling mode.

Checkout Procedures and Troubleshooting

Operational And Checkout Procedures

Lists essential operational checks and final inspections before system handover.

Troubleshooting

Presents a fault diagnostic chart correlating system faults with potential causes.