Question about GE Heating & Cooling

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Hi, I have an air handler motor made by GE Commercial motors. I think the motor number is N656 S. It's a 1/2 HP, 1075 rpm motor to replace my existing air handler motor. I want to install it in my air handler, but it's wiring appears to be different than on the system I currently have. The current system has a purple wire hooked up, and I don't know what it's for. There is also a red and black wire which correspond to the yellow and black wires on this motor, but nothing to compare to the purple...

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  • wyattfisher Sep 05, 2009

    it is 1075 (says so on the side of the new motor). this is an older unit, so that may be part of the reason for the different rating.

  • wyattfisher Sep 05, 2009

    The old motor had black, red, and purple hooked up to the "power side", a green (ground) and two brown (to a capacitor. The red is the high speed.
    The new motor has a red, orange, 2 yellow, green (ground), blue, purple, black, and 3 brown. It was pulled from another unit, so it is already "wired up". Purple goes to one of the yellow (as shown on the side of the motor), one brown to the orange (as on the motor), red and blue hang out (I presume additional speeds), two browns to a capacitor (as shown on the motor side), which leaves the green for ground, the black (which replaces the current black), and the yellow (which replaces the current red).
    I just don't know what the purple was for. According to the wiring diagram in the air handler, purple is high voltage, black is high speed, and red (or yellow) requires a manual to determine what to do... I don't have a manual.

  • wyattfisher Sep 05, 2009

    The old motor had black, red, and purple hooked up to the "power side", a green (ground) and two brown (to a capacitor. The red is the high speed.
    The new motor has a red, orange, 2 yellow, green (ground), blue, purple, black, and 3 brown. It was pulled from another unit, so it is already "wired up". Purple goes to one of the yellow (as shown on the side of the motor), one brown to the orange (as on the motor), red and blue hang out (I presume additional speeds), two browns to a capacitor (as shown on the motor side), which leaves the green for ground, the black (which replaces the current black), and the yellow (which replaces the current red).
    I just don't know what the purple was for. According to the wiring diagram in the air handler, purple is high voltage, black is high speed, and red (or yellow) requires a manual to determine what to do... I don't have a manual.

  • wyattfisher Sep 05, 2009

    I got it figured out... it took both motor wiring diagrams, and the air handler wiring diagram to figure out what was going on! It turns out that the red was NOT the power in (despite that being what the air handler said), it was the low speed setting. It was hooked up, even though it couldn't be used (single speed air handler). It took me almost 5 hours to get things figured out this morning, and get the new one installed, but it is up and running! Thanks to everyone for the help, I didn't realize that there would be 3 wiring diagrams involved, and each would have different wire colors identified. The key was seeing what the INTENT of the wires were, and connecting accordingly.

  • David Shaub May 11, 2010

    If you don't have the proper motor, don't put it in. 1075 doesn't sound right for the motor you described. Are you sure it isn't 1725? That's pretty much the industry standard.

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See where the purple wire is hooked up in the existing motor diagram (it could be the capacitor or a lower speed for the heater) and compared with the new one , and put it in the same place .But the easiest way to do it ,is to get the original replacement motor.

Posted on Sep 05, 2009

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THERE SHOULD BE OR THE MOTOR SHOULD HAVE COME WITH A SCHAMTIC SOME TIMES THE PURPLE WIRE IS FOR A CAPACITOR TO HELP START THE MOTOR OR COULD BE A TWO SPEED MOTOR. THE NOTOR SHOULD TELL YOU THIS

Posted on Sep 05, 2009

Testimonial: "Thanks for the help. Too many wiring diagrams is all I can say! I did get it figured out, thanks to the wiring diagrams on the motors. "

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