Original message
| botree
 |  "need to move lots of air"
, posted Wed 16 Jan 11:04  
If you read the posts all I wanted to do was hook up a used blower I salvaged to pull air thru some duct work to the outside. The blower motor has four wires. White,red,blue and black.A sticker on the motor says they are different speeds.
I just wanted to know why I can't get more than one speed out of it. If you are angry because you think I am trying to do HVAC work then I misunderstand what I am doing. There are hundreds if not thousands of people who use torches to work with glass and this method of getting fumes out of the way is what is used. I just thought this would be the ideal place to get an answer to my question.
How do you hook up the white(common) with the red, blue or black to get the different speeds.
If you think that I should hire a HVAC person to do this say so, but I thought I could get a simple answer here since I'm not trying to a major job.
Fact is if any of you saw what I have put together you would all get a big laugh out of it and walk away.
I realize all I have done is piss off some people by asking and this is not my intention. Just wanted some information that a lot of people have and thought that someone would share.
Thanks...Bo
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| static
|  "Just wonderin' if ya got my vacuum tubes yet"
, posted Wed 16 Jan 17:55
I guess I don't understand.
No one here is angry with you...I don't think. Just being honest. But we've already answered your question. Plus the motor tells you what the wires are for and there's possibly also a diagram on the motor for how to hook it up.
The replies you've gotten have directly answered the exact question you asked. If they didn't answer what you are actually wanting to know, maybe it would help to rephrase your question or ask it a different way. I understand that it isn't always easy to translate a thought into words, and language can be a confusing thing.
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| | botree
| "Re(1):Just wonderin' if ya got my vacuum tube" , posted Wed 16 Jan 22:45
Thanks. I'll try again to ask the question. The motor has four wires coming from it. White, red,blue and black. The label on the motor listed red as low speed, blue as medium and black as high speed. I used a lamp cord which has an on-off switch on the hot side, a plug with the big prong on the other and spade terminals on the other end. Connected red next to white on the strip with the lamp cord connected on the other side of the terminal strip going to the outlet. When I plugged in the cord and turned the switch to on the motor came on. I don't know what speed but I assumed it was low. Romoved the red and connected the blue and so on. The motor speed was the same with all three wires.
How do you connect the wires from the motor to get all three speeds?
Also if my buddies are correct and the motor is burnt up how do I tell if it is bad when it is still running? How do you know when a motor is bad? The circuit breaker did operate. Does that not always protect what is connected to it?
I worked in a Mini-computer data center the last ten years I worked for BellSouth. There were dozens of computers from normal desk tops to ones the size of a big SUV. One day a tech came in the room and instead of hitting the alarm cancel button when the door opened he hit the kill power button next to it and dropped everything in the room. I never knew what silence was like til' all those fans stopped at once. Everything was okay tho' there were some anxious moments, so if all those computers can have power cut and be unaffected seems like the motor would be okay too.
Again, Thanks...Bo
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| | static
| "Re(2):Just wonderin' if ya got my vacuum tube" , posted Wed 16 Jan 23:46
How you tell if it's bad: If it overdraws it's amp rating (usually it will WAY overdraw it), smells burnt, lets out smoke, blows the breaker, and / or doesn't change speeds when you tell it to.
The circuit breaker does not protect the motor, it's only intended to protect the wire. To make the breaker trip, you must overdraw it's rating by about 20% for more than 15 seconds, or short the hot side directly to neutral or ground. Now on to the motor.
White is the common (neutral), you connect this wire and ONLY this wire to the neutral side of your cord. Red, Blue and Black are your speeds, you connect one and ONLY one of these to the hot side of your cord. You must cap off the ends (separate from each other) of the other two speed wires you are not using, because they will also be hot due to back EMF from the motor windings. You can only use one speed at a time because if you hook up two speeds to hot at the same time you will burn up the motor quickly. To use all three speeds (but still only one at a time) you will need either a relay, a three pole switch, or you will have to plug them in manually as you choose.
This is a diagram that I hope will help you or at least clarify things. I am assuming you have a PSC motor but if it is a shaded pole motor it will not have a capacitor. I have also depicted speed switching by means of a three way switch, but whatever means you use to switch speeds, you can only hook one speed wire to hot at a time, and only the common wire to neutral.
Was that the info you are after?
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| | coolmen
| "Re(3):Just wonderin' if ya got my vacuum tube" , posted Sun 27 Jan 10:36
most important!!!!! is to ground the fan
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