Trane TWA090 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 TWA090 Specifications

General

Brand	Trane
Model	TWA090
Category	Heat Pump
Language	English

Summary

Warnings, Cautions and Notices

Responsible Refrigerant Practices

Personal Protective Equipment (PPE) Required

Details mandatory PPE for installation/servicing due to potential hazards.

Introduction

R-410A Refrigerant Under Higher Pressure

Warns about R-410A's higher operating pressures compared to R-22 and the need for compatible equipment.

Line Sizing, Routing, and Component Selection

Liquid Lines

Expansion Valve and Check Valves

Gas Lines

Expansion Valves

TXV Sizing and Superheat Adjustment

Guides on selecting expansion valves based on capacity and adjusting superheat.

Remodel, Retrofit, or Replacement

R-410A System Compatibility and Conversion

Refrigerant Piping Examples

TTA Cooling-Only Unit Piping

TWA Heat Pump Piping

Indoor Coil Piping Configurations

Parts

TTA Component Selection Summary

Lists component selection details, including tube diameters and filter drier part numbers for TTA units.

TWA Component Selection Summary

Details component selection, tube diameters, and filter drier part numbers for TWA units.

Expansion Valve Selection

Provides a table for selecting expansion valves based on manufacturer, tonnage, and model.