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When is it essential to take measures to help release trapped CFC, HCFC, or HFC refrigerant from the compressor oil during refrigerant recovery?

User Kim
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Answer:

self-contained recovery device

Step-by-step explanation:

Based on the information provided within the question it can be said that it is essential to do this when using a self-contained recovery device. This is a piece of equipment used in order to remove refrigerant such as CFC, HCFC, or HFC refrigerants from various different appliances, by using a pressurized recovery tank.

User Waverick
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