Heat Pumps and Electric Heating - Fixed Speed to VS Blower Adapter ???

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zoneout
04-23-08, 12:53 PM
Anyone know if this can be used to convert a fixed speed blower to a variable speed air handler?

http://americanhvacparts.com/Merchant2/merchant.mvc?Screen=PROD&Product_Code=MOT678643A&Category_Code=m-ma :confused:

furd
04-23-08, 01:01 PM
That device is to vary the speed of fans on air-cooled condensers used on refrigeration (and air conditioning) systems. Perhaps it could be modified to vary the speed of a residential furnace/air handler blower but it would never come close to the performance of a real variable speed blower.

I suspect it would also have the fan motor growling.
HVACGuy
05-18-08, 02:04 PM
you would also need a multi speed motor to begin with. The true variable speed systems today use DC motors with a built in AC/DC inverter, this allows for true variable speed rather than just multi speed.