📖 Glossary, Tool
What is a vacuum pump?
Evacuates air and moisture from a sealed system before charging, the step that decides whether the repair lasts.
After a sealed system is opened and repaired, a vacuum pump pulls it down to a deep vacuum so that air and water vapor are removed before refrigerant goes in. The vacuum is verified with a micron gauge and a standing test. Rushing or skipping this leaves non condensables and moisture in the system, which raises operating pressures and forms acids that destroy the new compressor.
Where you’ll meet it
Repairs that involve vacuum pump
Related terms
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