Hansen FMP-71L-B, Frost Master Plus Defrost Control, 115V 50/60 HZ, 7-Day Clock

The Hansen Frost Master is an easy-to-use defrost controller for efficient removal of frost accumulation on evaporator coil surfaces. This controller uses simple, reliable solid-state electronics with a precision quartz time clock and time adjusting slide knobs to sequentially operate through logical defrost steps for smooth but complete and effective defrosting. The SPDT relays facilitate flexible connection of solenoid valves and control relays. Defrost mode and step times are easily viewed through the clear cover of the NEMA 4 enclosure. Typically, one controller is used per defrost control valve group.