Trane TTA150E User Manual

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

Trane TTA150E Specifications

General

Brand	Trane
Model	TTA150E
Category	Heat Pump
Language	English

Summary

Warnings, Cautions, and Notices

Safety Symbol Definitions

Defines WARNING, CAUTION, and NOTICE symbols used in the manual.

Arc/Flash Protection Requirements

Details specific PPE requirements for arc/flash protection according to NFPA70E.

Liquid Lines: Sizing, Routing, and Components

Line Sizing and Routing

Refrigerant System Components

Expansion Valves and Check Valves

Explains the function of expansion valves and the necessity of check valves for TWA heat pumps.

Gas Line: Sizing, Routing, and Underground Lines

Gas Line Sizing and Routing

Gas Line Insulation and Access Port

Expansion Valves

Expansion Valve Function and Selection

Details how expansion valves meter refrigerant and the importance of matching size to coil capacity.

Superheat Adjustment

Describes how to adjust expansion valves to achieve the correct superheat.

Controls

Remodel, Retrofit, or Replacement

R-410A Compatibility Considerations

Lists key components and materials that must be compatible with R-410A and POE oil.

POE Oil and System Cleanliness

Refrigerant Piping Examples

TTA Cooling-Only Unit Piping

TWA Heat Pump Unit Piping

Indoor Coil Piping Configurations

Component Selection and Parts