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Help eliminate my motor wiring ignorance

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Posted by no spam on April 18, 2007, 5:54 pm
 
I come seeking relief from my ignorance.

I have been given an old 'two piece' central air unit, i.e. the heater coil
and blower that was inside and the AC condenser outside. I'm not sure what,
if anything works but I'm not looking at trying to get it into working
condition. But I do have some questions I'm sure someone can answer.

I want to take the squirrel cage blower off the unit and use it for other
air moving projects. This is where my first point of ignorance comes in, I
don't know how to wire it up. I know some about wiring but mostly auto and
home wiring where you just use the proper sized wire from the power supply
to the proper connections and you disconnect the power BEFORE doing that. :)

I'm going to give a lot of info but I have found that too much info is much
better than too little.

The blower has two wires going from a switch/relay (I can give info off it
in needed) directly to the motor. A red one connects to a place labeled LO
and a black one to HI.

There is a GE capacitor with the following on it:

97F5339
1000 VDC 440 VAC
5uF(I can't mine the correct character for microfarad) I think it's a 5 the
label is damage a little
+06 -06% 50/60 Hz
PROTECTED P921
A10000AFC 8151GA30
DIELEKTROL VI
P921-0504
0815

An orange wire runs from transformer (info available if needed) to one side
of the cap then continues to the motor and a brown wire goes from the other
side of the cap to the motor.

What I would like to know is:

1) Is this blower a 220VAC only fan or can it be rigged up to run on 110VAC
or even DC?
2) How do run power to it.



Posted by Jeff Thies on April 18, 2007, 6:17 pm
 
no spam wrote:


   My thoughts are that this is a two speed (LO and HI) 220 VAC motor.
There should be a neutral connection, look to see if you can find a
white wire (or other connection) from the motor. You would connect from
the neutral (white) to *either* the red or black.

   The 440 VAC starting cap leads me to believe this is 220 stuff. AC
motors can't run directly off DC.

   Jeff


Posted by no spam on April 18, 2007, 7:30 pm
 

My thoughts as well with the LO and HI.



Nope, the only other wire on the motor is a green wire grounding it to the
frame.



Posted by Solar Flaire on April 19, 2007, 1:10 am
 If the unit plugs in to a 120v receptical then the motor has to be
120vac. Look at the ned of the cord.

The motor needs a third wire for the return of the 240v or the neutral
of 120v. The only way I can think this is possible if it is from some
third world country and they use the frame for a neutral wire to
return power. This would never be allowed in N.America or UK.

Take it to a motor repair shop and see if somebody will give you a
little lesson as a hobbyist.





Posted by no spam on April 19, 2007, 1:12 pm
 
My thought as well but there are ONLY three wires going to the motor.  I'll
say again.  One (brown) goes from the motor to a cap, one (red)is connected
at a spot marked LO, the third (black) connects to HI.

In my limited experience working with 220VAC red and black have always been
the two 'hot' wires.



I don't know where it came from but I am fairly sure that this is not the
case because the motor case has the standard green wire running from it to
the frame of the heater unit.



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