CG-SVX17D-EN 91
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
should occur.
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:
• 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.
Components of a typical CGAM unit are identified in the following diagrams.
Figure 60. Slant 20-35 ton component location
Discharge line
Ball valve
High pressure side
Schrader
Low pressure side
Schrader
Service valves
High pressure side
Schrader
Vent
valve
Flow
switch
Drain
valve
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