As shown in the illustrated refrigeration system piping schematic diagram with the various accessories and controls and equipped with an air-cooled condenser with high side pressure controls, what statement is true concerning the fan cycling control pressure switch? GS-RA-39

Illustration GS-RA-39: the U.S. Coast Guard has not released this illustration.

Question

As shown in the illustrated refrigeration system piping schematic diagram with the various accessories and controls and equipped with an air-cooled condenser with high side pressure controls, what statement is true concerning the fan cycling control pressure switch? GS-RA-39

Illustration GS-RA-39: the U.S. Coast Guard has not released this illustration.

Accepted Answer

Option B: With a condenser fitted with a single fan driven by a multi-speed electric motor, the fan speed would decrease under low ambient temperature conditions.. To maintain adequate condensing pressure during cold weather, a multi-speed condenser fan reduces speed under low ambient temperature conditions to prevent excessive head pressure drops and starvation of the expansion valve.