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I have a Trane XE1200 condensor for which I bought a replacement fan motor, same specs as the original G.E. motor. The original G.E. motor was wired to a dual capacitor, which is also wired to the compressor. The original G.E. motor had 4 wires, one of which was not hooked up. The replacement motor is an A.O. Smith model OAM10088 with 3 leads. Smith sent me a new 2-pole capacitor for the new motor. How do I wire it correctly?

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  • HANK MCNEIL May 11, 2010

    wire colors???

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OK, locate the terminals on the capacitor marked "HERM"(Compressor lead), "FAN", and "COM".(common)

HERM and COM remian as they are.

The wire going to "FAN" (usually brown) will be placed on either terminal of the new capacitor. (This is the ((usually brown)) wire comming off of the fan motor.) An additional wire needs to be run from the other terminal of the new capacitor to the "COM" on the old capacior.

What you are doing is bypassing the fan side of the old capacitor but still using the compressor side of the old Cap.

The fan should have a wiring diagram on it to help identify the wires if there is no brown wire. The other two wires will be identified on the wiring diagram as well, but one typically goes to the contactor and the other to the board.

Posted on Sep 07, 2009

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