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Discussion Starter · #1 ·
Hello All - First post here. I have not had the experience wiring a line voltage stat for an exhaust fan before and would like to ask the question here I am not sure about.
The Exhaust fan is for a greenhouse and it has a "heat" terminal and a "cool" terminal, also a "P" terminal.
The wiring diagram I have looked at shows L1 going directly to one leg of the fan and L2 going to "P" and the load side "cool" term.
My question is, can the 120v L1 sit on the motor with out harming the coil with what to me would be a low voltage condition to the motor.
This is a 240v fan (I have not seen it to know if it a single or two speed)
 

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bubba3228 said:
Hello All - First post here. I have not had the experience wiring a line voltage stat for an exhaust fan before and would like to ask the question here I am not sure about. The Exhaust fan is for a greenhouse and it has a "heat" terminal and a "cool" terminal, also a "P" terminal. The wiring diagram I have looked at shows L1 going directly to one leg of the fan and L2 going to "P" and the load side "cool" term. My question is, can the 120v L1 sit on the motor with out harming the coil with what to me would be a low voltage condition to the motor. This is a 240v fan (I have not seen it to know if it a single or two speed)
Yes, but you need a way to disconnect all power to the fan, double pole switch or disconnect.
 

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Discussion Starter · #4 ·
Good point on the service disconnect.

So I take it no harm will be done to the motor windings because the motor is not operating and drawing any current with only one of the two legs energized, until the stat calls?
 
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