Attic Gable ventilation fan

Old 09-09-22, 08:22 AM
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Attic Gable ventilation fan

I picked up this attic Gable ventilation fan off Facebook marketplace for free. Now I have wired a lot of things, but HVAC is not an area that I'm familiar with. So my questions are, can I wire this thing directly or does it have to have a compactor? And, it has 4 wires, since I'm fairly sure this isn't a 220 volt unit then I'm going to go with the wiring must be for speed control. This is going to be mounted over the gable vent in the loft of my shop. I have tried installing Window AC units out here but 2 units in 2 years is getting expensive. And this is Florida, just a fan in the window doesn't do anything. I need to move some air. I really need to drop the humidity. But unless I'm moving this shop to a different part is the world that's not going to happen. So a fan in the gable vent it is. That will at last move a lot larger amount of air than this little fan in my window does.

So, I have Black, green, purple and brown. Those are all original wires from the manufacturer. The green is ground, the black is common I'm guessing. Anytime I know what the purple and brown are? And when this being AC which is the neutral. Black should be hot.

Like I said, HVAC is not something I'm familiar with. So, HELP, PLEASE.

Any assistance is greatly appreciated and thanks in advance.
Old 09-09-22, 10:41 PM
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Welcome to the forums.

So, I have Black, green, purple and brown.
Those are not "direct connect" to 120v colors.

A multispeed motor would be white, red, black and green.

Is there any make or model number on it ?
Maybe something on the motor.
Old 09-10-22, 09:15 PM
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The motor should state the required run capacitor and voltage on the tag.

I would connect black to black, purple to one side of the cap and neutral, and connect brown to the remaining side of the cap. ( After verifying voltage and the required run capacitor)

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