Connecting booster fan to blower motor

Discussion in 'HVAC' started by python01, Oct 21, 2013.

  1. Oct 21, 2013 #1

    python01

    python01

    python01

    Member

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    I would like to connect booster fan to the blower motor in my furnace. The blower motor has 5 wires going to it:
    - Neutral
    And 4 others:
    - Cool-H
    - Heat-H
    - Park
    - Park

    The booster fan is 120VAC and I wonder which wires is it best to connect to?
    They all get voltage when the the blower turns on.
    Should I use relay or direct connection will be better?
    The furnace is Trane XR90.
     
  2. Oct 22, 2013 #2

    guyod

    guyod

    guyod

    Senior Member

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    Hook it up to the relay controlling the blower
     

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