EVALUATING REFRIGERATION SYSTEMS
TROUBLESHOOTING & IDENTIFYING PROBLEMS
DVD Format: $39.95
In this 35-minute video presentation, well-known author and instructor Jim Johnson discusses the topics of identifying refrigerants, oil compatibility issues relative to CFC, HCFC, and HFC's, what the suction and discharge pressures should be on a system under normal operating conditions, and how to use manufacturer's charging charts.
Temperature test devices are used to check suction and liquid line temperatures and gauges show system pressures in order to evaluate superheat on fixed-bore metering device systems and subcooling on systems that use thermostatic expansion valve systems.
Includes information on how to determine if a refrigeration system is overcharged, undercharged, or restricted, and if a compressor is not pumping. The accompanying resource material is on a self-print CD.
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