Ray — Great question. On a dual run capacitor, there are 3 terminals. 1 labeled H or HERM of the compressor, one labeled C or COM for the common, and 1 labeled F or FAN for the fan motor. Since most OEM motors only have 3 wires and most replacement condenser fan motors have 4 wires, this creates a little confusion.. For a 4-wire DC motor, the wiring diagram typically consists of two power wires, one normally open (NO) and one normally closed (NC). The NO contact is used to turn the motor on or off and the NC contact is used to adjust speed. The other two wires are ground wires, which are used to provide an electrical connection to the motor's power source..
Diagram courtesy of Emerson New techs have a common question of how to wire a condensing fan motor for 3 vs. 4 wires. Jesse Grandbois submitted this tech tip to help make it simple. Thanks, Jesse! This tech tip is a quick one on the difference between wiring universal condenser fan motors and why brown […]. In the event that the nameplate with the wiring diagram is lost, wiring diagrams can be downloaded from www.minimotor.com . In the case of special connection diagrams, contact Mini Motor directly. For brushless servomotors, follow the diagrams available at www.minimotor.com when connecting the motors; the following cables must be used: