Trane 4TTX8048A - User Manual

18-AC95D1-5C-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
information 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.
4TTX8
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 4TTX8048A Specifications

General

Model	4TTX8048A
Type	Air Conditioner
SEER Rating	18
Refrigerant	R-410A
Voltage	208/230 V
Phase	1
Sound Level (Outdoor Unit)	74 dB
Cooling Capacity	48, 000 BTU/H
Compressor Type	Scroll

Summary

Section 1. Safety

Section 2. Unit Location Considerations

Unit Dimensions and Weight

Details unit sizes and estimated weights for various models.

Refrigerant Piping Limits

Specifies maximum total length and vertical change for refrigerant lines.

Suggested Locations for Best Reliability

Provides guidance on optimal placement for unit performance and longevity.

Cold Climate Considerations

Offers precautions for installations in areas prone to snow and freezing temperatures.

Section 3. Unit Preparation

Prepare The Unit For Installation

Outlines steps for checking and removing the unit from its packaging.

Section 4. Setting the Unit

Pad Installation

Details requirements for installing the outdoor unit on a support pad.

Section 5. Refrigerant Line Considerations

Refrigerant Line and Service Valve Connection Sizes

Presents tables for line sizes and service valve connections based on model.

Factory Charge

Explains the factory refrigerant charge amount and verification methods.

Required Refrigerant Line Length

Guides on measuring and recording line length and vertical change.

Refrigerant Line Insulation

Emphasizes the importance of insulating the vapor line.

Section 6. Refrigerant Line Routing

Precautions

Advises on routing line sets to prevent noise and comply with codes.

Section 7. Refrigerant Line Brazing

Braze The Refrigerant Lines

Details the step-by-step process for brazing refrigerant lines.

Section 8. Refrigerant Line Leak Check

Check For Leaks

Describes the procedure for pressurizing and checking refrigerant lines for leaks.

Section 9. Evacuation

Evacuate the Refrigerant Lines and Indoor Coil

Explains how to evacuate the system to the correct vacuum level.

Section 10. Service Valves

Open the Gas Service Valve

Instructs on the proper procedure for opening the gas service valve.

Open the Liquid Service Valve

Details the safe method for opening the liquid line service valve.

Section 11. Electrical - Low Voltage

Low Voltage Maximum Wire Length

Provides a table for maximum allowable low voltage wire lengths.

Low Voltage Hook-up Diagrams

Illustrates wiring connections for various thermostat and air handler configurations.

Section 12. Electrical - High Voltage

High Voltage Power Supply

Covers requirements for high voltage power supply and wiring compliance.

High Voltage Disconnect Switch

Recommends installing a separate disconnect switch for high voltage connections.

Section 13. System Start Up

System Start Up

Outlines the sequential steps for safely starting the installed system.

Section 14. System Charge Adjustment

Temperature Measurements

Explains how to measure outdoor and indoor temperatures for charging.

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

Details subcooling method for charging in warmer conditions.

Subcooling Charging Below 55° F Outdoor Temp.

Describes the weigh-in method for charging in cooler conditions.

Section 15. Checkout Procedures and Troubleshooting

Operational And Checkout Procedures

Lists essential checks to ensure proper system operation and safety.

Troubleshooting

Provides a guide to diagnose and resolve common system faults.