For a visual picture of typical wiring configurations reference the following guide. Jesse grandbois submitted this tech tip to help make it simple.
How To Wire 3 Speed Fan Switch
4 wire fan motor diagram. It reveals the elements of the circuit as simplified shapes and the power and signal connections between the tools. Simply a 3 wire fan reports its speed and a 4 wire fan lets regulate its speed by an external signal usually coming from the motherboard. On these 4 wire computer fans i have found that some times they require an input to tell it how fast to spin so simply supplying power to 2 of the wires will not work if you have a 3 wire fan however you can supply power to the red and black and leave the white disconnected. This is a quick one on the difference between wiring universal condenser fan motors and why brownwhite is the same wire as white. However the 4 wire fan is a little different as it has the fourth control wire to input a signal to the fan that commands it to speed up or speed down. Used 4 wire fan for these two projects.
4 wires is a common question by new techs. Finally this guide is intended to be used as a general overview of common condenser unit wiring schematics. The ins and outs of a 4 wire computer fan. Hvac condenser fan motor wiring diagram. Collection of 4 wire ceiling fan switch wiring diagram. How to wire a condensing fan motor for 3 vs.
A wiring diagram is a streamlined standard pictorial depiction of an electrical circuit. Some condenser fan motors wire to a circuit board while others use proprietary plugs for their connectors.
Gallery of 4 Wire Fan Motor Diagram
