A refrigeration plant has been prepared for...

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Question 1 of 205eccef9dbacbc34ba4d46103

A refrigeration plant has been prepared for opening up the system for non-major repairs by performing a system pumpdown and bringing the part of the system to be opened to 0 psig. At the completion of the repairs and after re-closing the system what is the recommended procedure?

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🔍 Key Concepts

• System contamination when a refrigeration system is opened to atmosphere • Difference between evacuation/dehydration and purging with nitrogen • Purpose of a deep vacuum pump versus a recovery unit

💭 Think About

• Think about what gets into the system whenever you open it to the atmosphere, even at 0 psig. • Which procedure specifically targets removal of moisture and non‑condensable gases from inside the system piping? • Between the four options, which one would you normally do before putting the refrigerant charge back into the section that was opened?

✅ Before You Answer

• Confirm which method is used to remove moisture and air from a refrigeration system before charging. • Check your understanding of the primary purpose of a recovery unit (what does it move and from where?). • Verify which step in standard refrigeration service procedures comes immediately before re‑introducing refrigerant charge into a section that was opened.

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