Watching the process of diagnosis is always interesting. Watching your hands do the R&R dance was delightful. Giving the distressed restaurant workers relief must have been satisfying for you. Bless your heart!
When you wire the motor with a speed control, you wire it for fast speed. (Then you have the extra colored speed wires) If you do not use a speed control, you wire the desired (RPM) speed per the wire color associated with that speed..... and then Neutral to Neutral. (For some of those motors, watch out, because Neutral is Black, not white) read the motor schematic to verify. I hope this helps.
Just got off a roof with same issue. The variable speed was off and owners manuals stated it should be on to prevent premature failure or over heating. I clean there exhaust hood so he called me to take a look. Wish I saw your video ahead of time I could have grabbed my voltage meter and followed your vid. It was just as dusty too.
Any recommendations on taking that motor off the hub? Obviously can’t use a hub puller due to the slanted metal on the hub. I’m changing one out exactly but the motor shaft is stuck on the hub even with grease I can’t get it off.
I have had much trouble getting them apart before. I have had to use a torch, and heat it up real hot and then spray oil on it, then pound on it a bunch. Not a very sophisticated answer, but that's how it goes sometimes.
Hey man I have a question. One of my customers called the top to the fan is missing. The motor and pulleys are exposed, do you know where I can find a top/cover? Thanks
Stop calling that simplistic motor speed controller a VFD. It's not even close to the technology of a VFD. Also, that double pole switch is supposed to be interlocked with the fryer below on one side. So anytime you turn that switch off to work on the fan, you end up shutting off the fryer below. And if the fryer below gets shut off, so does the exhaust.
Thanks man you’re spot on. I thought they went to a motor controller or motherboard but the gas shut off makes more since this is definitely an older captive air system