Hoffman Controls 870-10D Fan Cycle Switch

The Hoffman Controls 870-10D is designed for condenser fan motors that do not have the capability of variable speed. Head pressure control for proper heat rejection in low ambient temperatures is achieved by switching the fan on and off as needed. The control monitors the head pressure by sensing the sub-cooled liquid line temperature. All control parameters are embedded within the device and no field adjustments are required. (For use of continuously variable speed, see the following products: 8 for PSC motors, 816/814 for PSC Motors, 880-ECM Series ( for EC motors.)