Trane 4TTX5018A1000A User Manual

18-AC74D1-4
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.
4TTX5018A–060A, 049E
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 4TTX5018A1000A Specifications

General

Model Number	4TTX5018A1000A
Category	Air Conditioner
Energy Efficiency Ratio (EER)	12.5
Refrigerant Type	R-410A
Voltage	208/230V
Phase	1
Weight (Outdoor Unit)	150 lbs
Cooling Capacity	18000 BTU/H
Compressor Type	Scroll
Indoor Unit Type	Air Handler
Outdoor Unit Type	Condenser
Indoor Unit Compatibility	Compatible with Trane indoor units
Warranty	10 years

Summary

Section 1. Safety

Safety Warnings and Precautions

Consolidates all safety warnings and cautionary notes for installation and servicing.

Section 2. Unit Location Considerations

Unit Dimensions and Weight

Details physical size and weight of condensing units for placement planning.

Refrigerant Piping Limits

Specifies maximum lengths and vertical changes for refrigerant lines between units.

Suggested Locations for Best Reliability

Provides guidance on optimal outdoor unit placement for performance and airflow.

Coastal Considerations

Addresses specific installation requirements for environments near salt water.

Section 3. Unit Preparation

Prepare The Unit For Installation

Steps for inspecting and preparing the unit prior to installation.

Section 4. Setting the Unit

Pad Installation

Guidelines for properly installing the unit on a foundation or support pad.

Section 5. Refrigerant Line Considerations

Refrigerant Line and Service Valve Connection Sizes

Table detailing line sizes and valve connection diameters for various models.

Factory Charge

Information about the initial refrigerant charge and when adjustments are needed.

Required Refrigerant Line Length

Instructions for measuring line length and vertical change for system calculations.

Refrigerant Line Insulation

Importance of insulating the vapor line and preventing direct contact.

Reuse Existing Refrigerant Lines

Precautions and checks for using existing refrigerant lines in retrofit applications.

Section 6. Refrigerant Line Routing

Precautions

Guidelines for routing refrigerant lines to prevent noise and ensure proper installation.

Section 7. Refrigerant Line Brazing

Braze The Refrigerant Lines

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

Section 8. Refrigerant Line Leak Check

Check For Leaks

Procedure for pressurizing lines with nitrogen and checking for leaks using a soap solution.

Section 9. Evacuation

Evacuate the Refrigerant Lines and Indoor Coil

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

Section 10. Service Valves

Open the Gas Service Valve

Instructions for opening the gas service valve correctly.

Open the Liquid Service Valve

Instructions for opening the liquid service valve with critical safety warnings.

Section 11. Electrical - Low Voltage

Low Voltage Maximum Wire Length

Table specifying maximum wire lengths for low voltage connections based on gauge.

Low Voltage Hook-up Diagrams

Diagrams illustrating low voltage wiring connections for various indoor units and thermostats.

Section 12. Electrical - High Voltage

High Voltage Power Supply

Requirements and considerations for connecting the high voltage power supply.

High Voltage Disconnect Switch

Guidance on installing a separate disconnect switch for high voltage connections.

High Voltage Ground

Requirements for proper grounding of the outdoor unit per codes.

Section 13. Start Up

System Start Up

Step-by-step instructions for safely starting the installed HVAC system.

Section 14. System Charge Adjustment

Temperature Measurements

Guidance on measuring outdoor and indoor temperatures for accurate charging.

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

Detailed procedure for adjusting refrigerant charge using subcooling method.

Section 15. Checkout Procedures and Troubleshooting

Operational And Checkout Procedures

A checklist for final system inspection and operational checks post-installation.

Troubleshooting

Fault diagnosis guide for common system issues and their primary/secondary causes.