Trane 4TWX6 User Manual

18-AC105D1-1D-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
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.
4TWX6
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 ................................................... 12
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 4TWX6 Specifications

General

Brand	Trane
Model	4TWX6
Category	Heat Pump
Language	English

Summary

Safety Information and Warnings

General Safety Precautions

Essential safety guidelines and warnings for installation and service.

Unit Location Considerations

Unit Dimensions and Weight

Details unit dimensions and weight for proper placement and support.

Refrigerant Piping Limits

Specifies maximum refrigerant line length and vertical change.

Optimal Outdoor Unit Placement

Recommendations for unit placement to ensure airflow and avoid operational issues.

Cold Climate Installation Precautions

Guidelines for installing units in areas with snow and freezing temperatures.

Coastal Environment Installation

Advice for installing units near salt water environments.

Unit Preparation for Installation

Initial Unit Preparation Steps

Steps for checking unit condition and removing it from the pallet.

Setting the Outdoor Unit

Outdoor Unit Pad Installation Guidelines

Key considerations for installing the unit on a support pad.

Refrigerant Line Considerations

Refrigerant Line and Valve Sizes

Specifies connection sizes for refrigerant lines and service valves.

Factory Refrigerant Charge Details

Information on the factory charge and when adjustments are needed.

Refrigerant Line Length and Lift

Guidance on measuring line length and vertical change for charging.

Refrigerant Line Insulation Requirements

Importance of insulating the vapor line and preventing metal-to-metal contact.

Reusing Existing Refrigerant Lines

Precautions and checks when reusing existing refrigerant lines.

Refrigerant Line Routing

Refrigerant Line Routing Precautions

Steps to prevent noise transmission and ensure proper line routing.

Refrigerant Line Brazing

Steps for Brazing Refrigerant Lines

Detailed procedure for preparing and brazing refrigerant lines.

Refrigerant Line Leak Check

Performing Refrigerant Line Leak Check

Procedure for pressurizing and checking refrigerant lines for leaks.

System Evacuation

Evacuating Lines and Indoor Coil

Steps for achieving proper vacuum levels in the system.

Service Valve Operation

Opening the Gas Service Valve

Procedure for opening the gas service valve correctly.

Opening the Liquid Service Valve

Procedure and caution for opening the liquid service valve.

Low Voltage Electrical Connections

Low Voltage Wire Length Limits

Maximum allowable lengths for low voltage wiring based on gauge.

Low Voltage Wiring Diagrams

Diagrams illustrating low voltage hook-up for different thermostat types.

Defrost Control Operation and Checkout

Details on defrost control settings and operational checks.

High Voltage Electrical Connections

High Voltage Power Supply Requirements

Guidelines for connecting high voltage power supply and compliance.

High Voltage Disconnect Switch Installation

Recommendation for installing a separate disconnect switch.

High Voltage Grounding

Requirements for grounding the outdoor unit.

System Start Up Procedure

Initial System Start Up Steps

Step-by-step guide for powering up and starting the unit.

System Charge Adjustment

Temperature Measurements for Charging

How to measure temperatures for subcooling charge adjustment.

Subcooling Charging (Cooling > 55°F)

Procedure for adjusting charge using subcooling in cooling mode.

Charge Adjustment (Heating Mode < 55°F)

Method for adjusting charge in heating mode below 55°F outdoor.

Checkout Procedures and Troubleshooting

Final Operational and Checkout Procedures

Final inspection and operational checks for system performance.

System Faults and Troubleshooting Guide

Guide to identifying and resolving system faults based on symptoms.