Trane 4TTV0024A1000A User Manual

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Only qualified personnel should install and service the equipment. The installation, starting up, and servicing of heating, ventilating, and
air-conditioning equipment can be hazardous and requires specific knowledge and training. Improperly installed, adjusted or altered
equipment by an unqualified person could result in death or serious injury. When working on the equipment, observe all precautions in the
literature and on the tags, stickers, and labels that are attached to the equipment.
October 2014
18-BC89D1-1D-EN
Variable Speed ComfortLink™™ II
Heat Pumps and Air Conditioners
4TWV0024A1000A
4TWV0036A1000A
4TWV0048A1000A
4TWV0060A1000A
4TTV0024A1000A
4TTV0036B1000A
4TTV0048A1000A
4TTV0060A1000A
4TTV0061A1000A
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Installer’s Guide

Trane 4TTV0024A1000A Specifications

General

Brand	Trane
Model	4TTV0024A1000A
Category	Heat Pump
Language	English

Summary

Safety Section - Outdoor

Electrical and Refrigerant Safety Warnings

Critical safety warnings regarding voltage, refrigerant, oil, hot surfaces, grounding, service valves, brazing, and leakage.

Unit Location Considerations

Cold Climate and Coastal Installation Guidelines

Guidelines for cold climate precautions and coastal installation requirements.

Unit Preparation

Pad Installation Guidelines

Requirements and considerations for installing the unit on a support pad.

Refrigerant Line Considerations

Line Length, Insulation, and Routing Precautions

Guidance on refrigerant line length, insulation, routing, and isolation precautions.

Refrigerant Line Brazing

Brazing Procedure Steps

Step-by-step instructions for brazing refrigerant lines to service valves.

Refrigerant Line Leak Check and Evacuation

Leak Testing and Vacuum Procedures

Methods for checking refrigerant lines for leaks and performing system evacuation.

Charging: Weigh-In Method

Calculating Refrigerant Charge

Procedures for calculating and verifying system refrigerant charge using the weigh-in method.

Service Valves

Opening Gas and Liquid Service Valves

Instructions on how to safely open the gas and liquid service valves.

Electrical – Low Voltage

Low Voltage Wiring and Diagrams

Information on low voltage wiring, maximum wire lengths, and hook-up diagrams.

Electrical – High Voltage

High Voltage Safety and Connection Requirements

Warnings and instructions for high voltage power supply, disconnect switches, and grounding.

Integrated Variable Speed Control Board LED Indicators

LED Status and Communication Indicators

Explanation of LED indicators on the control board for system status and communication.

Start Up

System Startup and Initial Operation

Steps to follow for safely starting up the system after installation.

System Charge Adjustment

Subcooling Charging Corrections and Measurements

Methods for adjusting system charge based on temperature measurements and subcooling corrections.

Subcool Charging Correction Charts

R-410A Refrigerant Charging Charts

Charts and tables for subcool charging corrections and R-410A refrigerant charging.

Charging the Unit

Gage Pressure, Stabilization, and Performance Verification

Procedures for setting proper gage pressure, stabilizing the system, and verifying performance.

Communicating Display Assembly (CDA)

CDA Navigation and Technician Menus

Instructions for navigating the CDA and accessing technician menus for system configuration and tests.

Defrost Control (Heat Pump only)

Demand Defrost Operation and Initiation

Explanation of demand defrost operation, initiation logic, and CDA navigation for forced defrost.

Checkout Procedures

Final Installation Checks and System Readiness

Comprehensive list of checks to ensure proper installation and system readiness.