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    jazzd's Avatar
    jazzd Posts: 2, Reputation: 1
    New Member
     
    #1

    Aug 7, 2009, 03:57 PM
    Hooking up inside blower motor
    I have a Emerson direct drive blower with the following wires: white, black, red, blue, brown with white strip, brown. The problem is that the wires don't match the color coded wires on the old unit and I have no idea which wires go with the wires in the furnace. Can you help?
    mygirlsdad77's Avatar
    mygirlsdad77 Posts: 5,713, Reputation: 339
    Plumbing Expert
     
    #2

    Aug 7, 2009, 04:09 PM

    What are the colors of the wires on the furnace? Do they hook to a control board, and if so, what are the markings on the board where the fan wires hook to. Keep the info coming and we will help you out.
    jazzd's Avatar
    jazzd Posts: 2, Reputation: 1
    New Member
     
    #3

    Aug 7, 2009, 05:28 PM

    Thank you. Here is what I have: the furnace is set up for gas heating and the blower for the AC. It is at least 30 tears old. I have 1 white, 1 black and 1 copper wire encased in a large white wrapper/cover. Then there is 1 smaller white, 1 green and 1 black wire encased in a black wrapper/cover. Along with two white/purple striped capacitor wires there is a large black wire. There is also a brown 'box'. One small back wire and small white wire, large white, large black wire are plugged into that. The only thing I have figured out on this wiring is the positive and negative. I can't fire that out on the motor itself. Thanks for the help!
    wmproop's Avatar
    wmproop Posts: 3,749, Reputation: 91
    Ultra Member
     
    #4

    Aug 7, 2009, 07:54 PM
    Go for it ,mygirlsdad,, I`m confused already
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
     
    #5

    Aug 7, 2009, 08:09 PM
    Unfortunately when the wire colors do not match the wires will need to be sounded out by the use of an electric meter. By using an electric meter you will be able to tell which wires are activated for the heating mode and which wires will be activated for the A/C mode. Then wire the new motor as per the wiring diagram on the side of the new motor or the wiring diagram that came with the motor in the box. NOTE: You will have to decide the speeds you choose for use with the new motor. Usually the low speed is for heat and the medium or high speed is used for A/C. If a professional was doing the work he would use an Amprobe to be sure the motor is not overloaded by the speeds you have chosen.

    The easy wires to figure out are the two for the new capacitor you bought with the new motor. On the side of the motor it will indicate which wires are for the new capacitor. In your case the brown and the brown with white stripe are to be attached to the new capacitor that you bought for the new motor. You can toss the old motor capacitor in the garbage can since it is of no value.

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