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macsw air conditioning certification test| Questions Solved 100% Correct | Verified Answers
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when using an hfc134a refrigerant recovery machine after completing the first recovery process how long must you wait, then check the machines gauges for a rise in pressure above vacuum which would indicate that the system still contains some refrigerant - ANSWER 5 minutes what can happen if refrigerant storage tank is overfilled - ANSWER tank may explode
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