White-Rodgers 47D40-801 Heat Pump Defrost Demand Control Board, Replacement for Rheem TUV-APCO-DER2 Arkla (Servel Inc): 15691-331 Borg-Warner

Arkla (Servel Inc): 15691-331 Borg-Warner (York): O25-23019-000 Carrier: EF32CH190

An insulated

one-hand operation

Test pressure switches

Fluke 117 - User's Manual

White-Rodgers 47D40-801 Heat Pump Defrost Demand Control Board, Replacement for Rheem TUV-APCO-DER2 Arkla (Servel Inc): 15691-331 Borg-WarnerWhite Rodgers 47D40 801 Heat Pump Defrost Demand Control Board, Replacement for Rheem The 47D40 801 control is a microprocessor based demand defrost controller intended for Rheem heat pump systems. This controller uses basic differential temperature means to detect degradation of system performance due to ice build up on the outdoor coil. The controller uses self calibrating principles to calibrate to the heat pump system. The defrosting is performed