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Trane TTA Series User Manual

Trane TTA Series
28 pages
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October 2009
SS-APG008-EN
Tube Size and Component
Selection
for TTA and TWA Split Systems (6-20 Tons)
Using Refrigerant 410A
Model Numbers:
TTA073D TTA090D TTA120D
TTA120E TTA120F TTA150E
TTA180E TTA180F TTA240E
TTA240F TWA073D TWA120D
TWA180E TWA240E TWA090
Application Guide
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Trane TTA Series Specifications

General IconGeneral
RefrigerantR-410A
Voltage208/230V
Cooling Capacity1.5 to 5 tons
Heating Capacity1.5 to 5 tons
Sound Level72 dB

Summary

Warnings, Cautions and Notices

Safety and Precautions

Covers general warnings, cautions, notices, environmental concerns, responsible refrigerant practices, and required PPE.

Introduction

Document Scope and Purpose

Explains the application guide's content for TTA/TWA systems using R-410A refrigerant and POE oil.

Overview

Refrigerant Piping Principles

Discusses traditional piping principles and major components of split air-conditioning systems.

Updated Piping Guidelines

Provides updated guidelines for liquid and suction lines for R-410A refrigerant, including pressure drops and velocities.

Equipment Placement Considerations

Focuses on minimizing distance between components for optimal system performance and refrigerant charge.

Line Sizing, Routing, and Component Selection

Liquid Line Sizing and Routing

Details proper sizing, slope, and insulation requirements for liquid refrigerant lines.

Gas Line Sizing and Routing

Details proper sizing, slope, and insulation requirements for gas refrigerant lines, focusing on oil return.

Expansion Valves

Explains the function, selection, and adjustment of expansion valves for proper refrigerant distribution.

Controls

Discusses system control options like Relia Tel and thermostat control, and stability requirements.

Hot Gas Bypass

Explains the use and implications of hot gas bypass (HGBP) versus Evaporator Defrost Control (EDC).

Remodel, Retrofit, or Replacement

System Upgrade Guidelines

Provides guidance on converting existing systems to R-410A, POE oil, and compatible components.

Refrigerant Piping Examples

TTA and TWA System Diagrams

Illustrates typical refrigerant piping arrangements for TTA and TWA split systems with various indoor coil configurations.

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