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Engine_2014 : General Subjects - 3179/3524
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When a refrigeration system is being topped off with a small amount of refrigerant through the low side with the compressor running, what should be done?
A) the refrigerant should be charged into the system as a vapor
B) the suction service valve must be back seated
C) the discharge service valve must be front seated
D) the refrigerant charging cylinder should be turned upside down
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