Transcription of BEST PRACTICES: Pulling a DEEP VACUUM
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BEST PRACTICES: Pulling a DEEP VACUUM
RSES Journal JULY 2017A ROOM WITH A LEAK Pulling a deep VACUUM A three-part series acquainting technicians with system evacuation best ANDREW ERBACH AND DAVE BOYDI mages courtesy of Appion unless otherwise a vapor compression refrigeration system to operate properly, the only fluids that should be inside the system are refrigerant and oil. This means that service techni-cians must be trained to apply best practices to ensure a proper VACUUM is pulled on any system left open to atmosphere before charging. The purpose of this three-part series is to acquaint the technician with current best practice in system evacuation.
Vacuum pumps The most common type of vacuum pump in the refrigera-tion industry is a two-stage rotary vane pump. This pump is designed to remove non-condensables (air and moisture) from the system. A properly operating and maintained vacuum pump should be able to pull down to at least 100 microns when blanked off.
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