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Gary LT

Heater & A/C blower motor to wire for household voltage?

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Gents, I am reaching out to ask if anyone (or all!) could help me with the blower motor. A few ran ago, the main A/C units had an irreparable leak, so as they replaced the furnace/AC combined unit, I asked them to save me some parts. I’d like to see if it can be wired to run normal household (120ac volts). It’s a GE 1/2HP 1000 rpms and has a capacitor, (brown wires go to the capacitor). I’d like to it in my shop if that day ever comes! If not, I can always find use for even the 1/2HP motor.

attached are photos of this huge fan, I also have a photo of the induction blower motor, which I wired easy enough. Output is close to around 100cfm base on another squirrel cage fan I have already marked. I had set this up for my ribbon burner but there wasn’t enough force or pressure to push the mix through for proper combustion.

kind regards, 

Gary LT

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I hope this forum is okay to post this in. If not could an administrator direct me to the appropriate forum.?:huh:

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It should probably be up in Tools and Tooling, but it doesn't matter much.  The big fan off the heat pump is good to go off standard house wiring.  I have one in the gable as a powered vent fan.  Dunno about the little one, sorry.

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Thanks Alan. The little one works. It’s the big one I am trying to wrap my feeble brain around. I guess I can attempt a simple wiring and use a surge protector just in case! :o

Gary LT

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The GE motor pictured is labeled for 120 V single phase power at 7.1 amps.  This should run off any normal 120 V household circuit connected to the terminals designated as "LINE".  Note that typically capacitor start motors should not be connected to dimmer switches to attempt to modulate flow rate.  This unit may have an integral speed control, the box on the wiring diagram, but you would need more information before attempting to use that.  I personally don't like squirrel cage fans (forward curved centrifugal) for forced air burners, as they are designed for relatively high volumes of air at low pressure.  Combustion air fans are more typically centrifugal blowers with radial blades.  Depending on it's flow characteristics this fan may be appropriate for a solid fuel fire air supply.

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Thank you Dan, I will follow the “line”markings on the diagram and see what happens. This is simply to move some air in a shop, so if not enough, I’ll toss it I reckon!

Much appreciated Alan and Dan, 

Gary LT

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Oh, it will move air in the shop.  That is exactly what it was designed for.  I thought from your earlier post that you were planning on using it in a burner assembly.

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Sorry to be confusing Dan! I hope to see how this things will work this weekend, (missus permitting!)

Gary LT

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