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? Illustration 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? Illustration GS-RA-39

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

Accepted Answer

Option C: 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.. In multi-speed condenser fan applications, low ambient temperatures reduce condensing capacity requirements, causing fan speed controls to step down fan velocity to maintain stable, acceptable high-side head pressures.