If it is necessary to increase the operating head pressure of the refrigeration system using the device shown in the illustration, what should be done? Illustration GS-RA-14 Illustration GS-RA-14: the U.S. Coast Guard has not released this illustration.

Correct Answer: Option A — "2" should be turned to further compress the spring

Increasing operating head pressure requires compressing the control switch's opposing range spring. Turning component "2" clockwise further compresses the spring, demanding a higher actuating pressure from the bellows to trip the switch contacts, thereby raising the overall system operating pressure parameters.