Divine Nest Variable Speed Fan Wiring

Wiring a variable speed motor is the same as wiring a single speed motor as the speed control function is an integral part of the motor.

Nest variable speed fan wiring. An hvac tech may be able to set it higher but then that would be the fan speed all the time. Use wire strippers to remove the outer plastic covering on the wire so the two internal wires are visible. Their documentation explains how to hook it up but doesn t go in depth.

It will run on high for a bit spool down for a bit and then speed up again. Choose system fan speed. The documentation can be found here.

I installed a nest on one variable speed unit. Unless the speeds are controlled on the backend by your system. Select the fan speed you d.

Get your wire prepared so you can connect it to your variable speed motor. I had to move the wiring in the furnace from the special a b c d connections to the regular r y g w c and then the nest could control the furnace but with only one fan speed. If you have a multi speed fan with a single 24 volt wire the speed of your fan is not.

If the furnace is multistage not variable speed the nest can handle multi stage heat and cool but can not do variable speed for that you need tranes proprietary thermostat. Your thermostat will work a little differently if you have a single fan wire or if you have several. Nest can t control different fan speeds so if you have a multi speed fan it will always be on the lowest setting.

In august of 2017 nest added support for multi speed fan for systems that use 24 volts. Learn more about the nest thermostat and multi speed fans. Therefore you only need to connect two wires to the motor s terminals.