Question: To prevent the head pressure from dropping to the point that the expansion valve will not feed correctly A . a pumpdown system is used.

To prevent the head pressure from dropping to the point that the expansion valve will not feed correctly
A. a pumpdown system is used.
B. an evaporator pressure regulator is used.
C. low-ambient controls are used.
D. a high-pressure control is used.
To prevent the head pressure from dropping to the point that

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