Why is evacuating a refrigeration system important?
A) Evacuation increases the system head pressure and compression ratio.
B) Increases in the system high-side pressure and temperature can only be accomplished by proper evacuation.
C) Evacuation is the only procedure to ensure that noncondensable gases and moisture are removed from HFC systems with a POE lubricant.
D) Noncondensable gases and moisture, the two most common system contaminants, can be removed through evacuation.
D
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