When adding oil to a refrigeration system...

Question 1 / 270705eccef9dbacbc34ba4d460bc

Question 1 of 270705eccef9dbacbc34ba4d460bc

When adding oil to a refrigeration system using a oil charging hand pump, what precaution must be taken?

Question 1 of 27070

When adding oil to a refrigeration system using a oil charging hand pump, what precaution must be taken?

🔍 Key Concepts

• Contamination risks in a sealed refrigeration system • Effects of introducing air or non-condensable gases into the system • Safe methods for purging hoses and tools before connecting to the system

💭 Think About

• Which substance, if left in the pump and hoses, would be most harmful to system performance: air, nitrogen, or clean refrigeration oil? • What is the primary goal when preparing the hand pump and hoses before connecting to the refrigeration system? • Think about which choice describes a normal service procedure versus something that would be unusual or risky for the compressor crankcase.

✅ Before You Answer

• Confirm which medium is acceptable to be inside the refrigeration circuit (is dry nitrogen normally left in the system during operation?) • Check which options involve purging the pump and hoses versus purging the compressor crankcase • Verify that the chosen method avoids introducing non‑condensable gases into the system

Question 1 of 27070

When adding oil to a refrigeration system using a oil charging hand pump, what precaution must be taken?

all air is purged from the pump and hoses using clean refrigeration oil or refrigerant vapor

all air is purged from the pump and hoses using dry nitrogen

all refrigerant vapor is purged from the compressor crankcase using dry nitrogen

all refrigerant vapor is purged from the compressor crankcase using clean refrigeration oil

Question 1 / 270705eccef9dbacbc34ba4d460bc

Question 1 of 270705eccef9dbacbc34ba4d460bc

When adding oil to a refrigeration system using a oil charging hand pump, what precaution must be taken?

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Question 1 of 27070

When adding oil to a refrigeration system using a oil charging hand pump, what precaution must be taken?