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How to wire duct fan to Carrier 58MVC100-20 furnace?
Hello. I hope someone can help me.
I want to wire a Suncourt 6" in-line duct fan into my duct to help boost airflow to an upstairs bedroom. I want to hardwire it to the blower motor so it only comes on when the blower is on. I have a Carrier Infinity 58MVC100-20 furnace. It has a "variable speed" blower.
I simply want to splice into the correct two wires at the blower motor harness(es) to connect the standard house wire that I ran from the Suncourt fan to the blower. So very simply I need to connect the black wire to something and the white wire to something, and of course ground it.
There are 2 wiring harnesses that plug into the blower motor. One is a 4 pin, and the other is a 5 pin. They are described below:
The 4 pin harness is marked +V (red wire), Tx (yellow wire), Rx (blue wire) and C (green wire).
The 5 pin harness is marked L (black wire), N (white wire), Ground (green and yellow wire), and the last two pins are jumped with a short piece of yellow wire.
Again, I want the in-line duct fan to ONLY COME ON WHEN THE BLOWER IS RUNNING, both for heating and cooling.
Can someone tell me which two wires I need to splice into?
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