SC Refrigeration Practice Questions - South Carolina Refrigeration Contractor Examination Exam

After a system is opened and reassembled, the preferred dehydration practice before charging is to:

Run the compressor to pull its own vacuum Evacuate with a two-stage vacuum pump to a deep vacuum (commonly 500 microns) and verify it holds Charge immediately if the sight glass looks dry Pressurize with refrigerant vapor only, with no vacuum

Correct Answer:

Evacuate with a two-stage vacuum pump to a deep vacuum (commonly 500 microns) and verify it holds

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