Trane 4TTR4042N User Manual

18-AC51D1-10F-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. Some of the benefits of
installing approved matched indoor and outdoor split systems are maximum efficiency, optimum performance and the best overall
system reliability.
4TTR4018 – 060
Table of Contents
Section 1. Safety ..................................................................................... 2
Section 2. Unit Location Considerations ............................................. 3
Section 3. Unit Preparation.................................................................... 4
Section 4. Setting the Unit ..................................................................... 4
Section 5. Refrigerant Line Considerations ......................................... 4
Section 6. Refrigerant Line Routing ..................................................... 5
Section 7. Refrigerant Line Brazing ...................................................... 7
Section 8. Refrigerant Line Leak Check ............................................... 7
Section 9. Evacuation ............................................................................ 8
Section 10. Service Valves .................................................................... 8
Section 11. Electrical - Low Voltage ..................................................... 9
Section 12. Electrical - High Voltage .................................................. 10
Section 13. Start Up.............................................................................. 11
Section 14. System Charge Adjustment............................................. 11
Section 15. Checkout Procedures ...................................................... 15
Section 16. Refrigerant Circuits (Reference only) ............................. 15
Section 17. Wiring Diagrams ............................................................... 16
Section 18. Pressure Curves ............................................................... 20
Installation and Operation Manual

Trane 4TTR4042N Specifications

General

Model	4TTR4042N
Type	Heat Pump
SEER Rating	Up to 14.5
HSPF Rating	Up to 8.2
Refrigerant	R-410A
Voltage	208/230V
Cooling Capacity	42, 000 BTU/h
Compressor Type	Scroll
Electrical Phase	Single Phase
Heating Capacity	42, 000 BTU/h

Summary

Safety

General User Qualifications

Manual intended for individuals with electrical and mechanical experience.

Live Electrical Component Safety

Risk of death or serious injury from live electrical components during servicing.

R-410A Refrigerant Handling

R-410A operates at higher pressures; use approved service equipment.

Liquid Line Service Valve Caution

Extreme caution when opening liquid line service valve to prevent abrupt charge release.

Refrigerant Line Considerations

Refrigerant Line Brazing

Braze The Refrigerant Lines

Step-by-step instructions for brazing refrigerant lines with nitrogen purge.

Refrigerant Line Leak Check

Check For Leaks

Procedure for leak checking refrigerant lines using nitrogen pressure and soapy solution.

Evacuation

Evacuate Refrigerant Lines and Indoor Coil

Steps to evacuate the system to a specific micron level for moisture removal.

Service Valves

Open the Liquid Service Valve

Cautions and steps for opening the liquid service valve safely.

Start Up

System Start Up

System Charge Adjustment

Temperature Measurements for Charging

How to measure temperatures for subcooling and superheat charging methods.

Subcooling Charging in Cooling

Procedure for subcooling charging method for outdoor temperatures above 55°F.

Subcooling Charging Chart Corrections

Charts for determining subcooling correction values based on line length and lift.

Stabilize and Measure System Parameters

Steps to stabilize the system and measure liquid line temperature and pressure.

Determine Proper Liquid Gage Pressure

Using charging chart (Table 14.2) to find correct liquid gauge pressure.

Adjust Refrigerant Level

Steps to add or recover refrigerant to match chart values.

Superheat Charging Table

Checkout Procedures

Operational And Checkout Procedures

Pressure Curves

Pressure Curves for Cooling Performance

Pressure Curves for Additional Models