Trane 4TTR5048N User Manual

18-AC123D1-1B-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.
4TTR5018 – 060
Table of Contents
Section 1. Safety ..................................................................................... 2
Section 2. Unit Location Considerations ............................................. 3
Section 3. Unit Preparation.................................................................... 4
Section 4. Setting the Unit ..................................................................... 5
Section 5. Refrigerant Line Considerations ......................................... 5
Section 6. Refrigerant Line Routing ..................................................... 6
Section 7. Refrigerant Line Brazing ...................................................... 7
Section 8. Refrigerant Line Leak Check ............................................... 9
Section 9. Evacuation ............................................................................ 9
Section 10. Service Valves .................................................................. 10
Section 11. Electrical - Low Voltage ................................................... 10
Section 12. Electrical - High Voltage .................................................. 13
Section 13. Start Up.............................................................................. 13
Section 14. System Charge Adjustment............................................. 14
Section 15. Checkout Procedures ...................................................... 19
Section 16. Refrigeration Circuits........................................................20
Section 17. Wiring Diagrams................................................................22
Section 18. Pressure Curves................................................................26
Installation and Operation Manual

Trane 4TTR5048N Specifications

General

Brand	Trane
Model	4TTR5048N
Category	Heat Pump
Language	English

Summary

Safety Information

Live Electrical Components Warning

Electrical safety precautions to prevent death or serious injury during operation.

R-410A Refrigerant Handling Precautions

Information on R-410A refrigerant pressure, service equipment, and oil handling.

Liquid Line Service Valve Caution

Critical warning on opening Liquid Line Service Valve to prevent abrupt release of system charge.

Unit Location Considerations

Suggested Locations for Best Reliability

Recommendations for optimal outdoor unit placement to ensure airflow and avoid issues.

Unit Preparation

Prepare The Unit For Installation

Steps for initial unit preparation, including checking for damage and removing from pallet.

Refrigerant Line Considerations

Refrigerant Line Insulation

Refrigerant Line Brazing

Brazing Refrigerant Lines

Step-by-step guide for preparing and brazing refrigerant lines.

Refrigerant Line Leak Check

Checking for Leaks

Procedure for pressurizing lines with nitrogen and checking for leaks with soapy solution.

Evacuation Procedure

Evacuate Refrigerant Lines and Indoor Coil

Instructions for evacuating refrigerant lines and indoor coil using a micron gauge.

Electrical - Low Voltage

Low Voltage Hook-up Diagrams

Wiring diagrams for connecting thermostat, air handler, and outdoor unit for different systems.

Electrical - High Voltage

High Voltage Power Supply

Guidance on high voltage power supply requirements and compliance with codes.

High Voltage Disconnect Switch

High Voltage Grounding

System Start Up

System Start Up Procedure

Steps to ensure all previous sections are completed before initiating system start-up.

System Charge Adjustment

Temperature Measurements for Charging

Subcooling Charging in Cooling Mode

Detailed procedure for subcooling charging in cooling mode using charts.

Weigh-In Method for Charging

Procedure for weighing in refrigerant charge using a multiplier based on line length.

Checkout Procedures

Operational and Checkout Procedures

List of operational and checkout procedures to ensure proper system performance and safety.

Wiring Diagrams

4TTR5018 - 048 Models Wiring Diagram

4TTR5060 Models Wiring Diagram