Electromatic
Senior Member
- Location
- Virginia
- Occupation
- Master Electrician
I've never gotten into the nitty-gritty with single-phase variable speed motors except to know that only certain kinds of them can have any speed control at all. One of our service technicians has a customer with a whole-house fan that they would like to have run at different speeds. Right now, the motor is an A.O. Smith 316P758 :
and is controlled just by an on/off wall switch. I'm thinking we cannot just swap out the switch with a speed controller.
What do I need to look for as far as a new motor and control (other than just googling "variable speed fan motor")? I know I'll have to match the frame and shaft sizes and get something in the same HP and RPM range. Are there advantages/disadvantages of looking for something with several discreet set speeds vs. something more analog with almost a rheostat type of control?
I know this is fairly simple, and I should be more well-versed in this kind of application. Any help would, as always, be appreciated.
316P758, AO Smith, 1/4HP, 115V, Replacement Blower Motor
We know you need it FAST. We ship from many warehouses strategically located across the U.S. AO Smith is now Century. 316P758 has been updated.
tek4ufast.com
and is controlled just by an on/off wall switch. I'm thinking we cannot just swap out the switch with a speed controller.
What do I need to look for as far as a new motor and control (other than just googling "variable speed fan motor")? I know I'll have to match the frame and shaft sizes and get something in the same HP and RPM range. Are there advantages/disadvantages of looking for something with several discreet set speeds vs. something more analog with almost a rheostat type of control?
I know this is fairly simple, and I should be more well-versed in this kind of application. Any help would, as always, be appreciated.