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.

Question

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.

Accepted Answer

Option C: "2" should be turned to further compress the spring. Increasing operating head pressure on adjustable pressure controls requires turning the primary range adjustment screw to further compress the internal spring, increasing the opposition force against the sensing element.