Picked up this motor the other day.. found out it's the blower motor from a Window AC unit. It's just the right size physically, to replace the motor in an older Lakewood HV fan. It appears to be a two-speed, high and low, but the diagram on the label is not 100% straightforward for me. I don't want to apply power and smoke it if I don't have to.

So my understanding currently is Red/Red are for the 5uf cap, I have a 6uf/250v to use. White is common and black and Yellow would be the speeds with Black being high, Yellow being low.

But the imagery.. how they decided to express the wiring connections is just so weird to me. I don't know what the symbol is between white and the intersection with red. And Yellow being a 'center-tapped' inductor.. perhaps that's how it's regulating speed because of a phase shift?
Or is it just like applying input voltage mid-way in the windings results in half the realized voltage?

 

Looks to me as though for hi speed, Black and the white will be the live & Neutral.

 

INDEED, Max has it right. The yello might be for a higher speed, or a lower speed. I would leave it alone.

 

Sorry, Window AC unit means PC's motherboard?

 

Sorry, Window AC unit means PC's motherboard?

That would be a "Windows" AC unit.
I believe the TS is describing a window installation type air conditioner..
AND Max is still right.

 

In any event.. yellow and black caused the motor to act as though it was shorted event though the MM claims it's not. But it's not a problem as it's a shop fan now so the one speed is just fine for my purposes.
What's not fine however is after about half an hour of running the motor is very hot to the touch. I thought perhaps the 6uf run cap might be causing it when the label says it needs a 5uf. So I ordered some 5's that arrived today.. same problem though.
Both of the bearings within are brand new, I replaced them with some brand new 6200z's a couple weeks ago. I'm going to experiment with adding a washer between the halves of the motor case. The bottom bearing had a thrust washer but the top did not.. if I happen to have another of those I'll add it to the top bearing just to see.
But with how sparkling clean the windings and armature was, not to mention nothings tests shorted I'm assuming it's physical.