Cgam Operating Principles; General - Trane CGAM Installation & Operation Manual

CGAM Operating Principles

This section contains an overview of the operation of CGAM air-cooled liquid chiller equipped with
microcomputer-based control systems. It describes the overall operating principles of the CGAM
water chiller.
Note: To ensure proper diagnosis and repair, contact a qualified service organization if a problem

General

The Model CGAM units are scroll compressor air-cooled liquid chillers. These units are equipped
with unit-mounted starter/control panels and operates with R-410A refrigerant.
The basic components of an CGAM unit are:
•
•
•
•
•
•
•
Components of a typical CGAM unit are identified in the following diagrams.
Figure 60. Slant 20-35 ton component location
Discharge line
Ball valve
CG-SVX17D-EN
should occur.
Unit-mounted panel containing starter and Tracer CH530 controller and Input/Output LLIDS
Scroll compressors
Brazed plate evaporator
Air-cooled condenser with subcooler
Electronic expansion valve
Optional partial heat recovery
Related interconnecting piping.
High pressure side
Schrader
Service valves
Low pressure side
Schrader
Vent
Flow
valve
switch
High pressure side
Schrader
Drain
valve
91