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#129171 - 08/31/04 07:52 AM Decrease PSC Motor's RPMs?
wendel Offline

Registered: 08/07/04
Posts: 57
I have a blower motor for a furnace. It's a 3 speed, PSC, 1/4hp, 1050rpm, 115 volt generic HVAC motor. My problem is that even at the lowest speed, the blower is moving too much air.

Is there any way to slow the rpms of this motor down further below it's lowest speed setting?

#129172 - 08/31/04 04:30 PM Re: Decrease PSC Motor's RPMs?
maintenanceguy Offline

Registered: 12/02/01
Posts: 303
Loc: Southern NJ, USA
You could change the blower (supply house will size one for you) or add a damper.

#129173 - 09/01/04 11:10 PM Re: Decrease PSC Motor's RPMs?
Scott35 Offline

Broom Pusher and

Registered: 10/19/00
Posts: 2724
Loc: Anaheim, CA. USA
Could reduce speed via belt/pulley arrangement, or insert an Autotransformer in series with the Line Input of the PSC Motor - as this is the common method of speed reduction on the PSC fan Motors (Autotransformer wound into the Stator of the Motor).

Scott " 35 " Thompson
Just Say NO To Green Eggs And Ham!


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