- Location
- Tennessee NEC:2017
- Occupation
- Semi-Retired Electrician
Had a fellow electrician call me about a problem with a restaurant exhaust fan motor. From what he said the original motor quit. It was a 1/2 HP variable speed motor without cap. start. He (owner) replaced the motor with one he bought at a farm store (Name Brand). It was a single speed 1/2 HP cap. start.
Also, the motor/fan are belt driven.
My friend said it would run for about 15 minuites then the thermal overload would trip. The owner gets another motor and it does the same. Also he said they bypassed the variable speed switch.
I told him the motor was not the right one for the fan and probably not a continious run motor. I think the motor was pulling too many amps from the load and over heating. I told him he would probably have to order the same motor as the original.
Does this sound right with the advise given considering the circumstances? Or is there a way to get the replacement motors to work for this?
Also, the motor/fan are belt driven.
My friend said it would run for about 15 minuites then the thermal overload would trip. The owner gets another motor and it does the same. Also he said they bypassed the variable speed switch.
I told him the motor was not the right one for the fan and probably not a continious run motor. I think the motor was pulling too many amps from the load and over heating. I told him he would probably have to order the same motor as the original.
Does this sound right with the advise given considering the circumstances? Or is there a way to get the replacement motors to work for this?