c***@gmail.com
2015-04-25 09:39:23 UTC
I have a furnace blower that I plan to use just as a high powered fan. It's
a rather small squirrel cage direct drive blower.
I am assuming that the black wire is hot, and the white wire is common. And
then there are three colored wires that I'm assuming are LO, MED, HI
jumpers, but I don't know what they are to be attached to?
I have a Red, a Blue, and an Orange wire. Suppose that the red is HI and the
blue is MED and the orange is LO (just as an example)....does that mean that
the color of my choice needs to be contacting the ground/common or the hot?
I don't understand the theory behind these wires.
Also, there is a capacitor with two terminals on it mounted on this unit.
Both terminals have a brown wire that goes directly into the motor.
The ends of all these wires, including the black and white have just been
cut off blunt, and of course there is no wiring diagram attached to the
blower.
My main question is not to determine which color is which speed, I can
figure that part out on my own *if* I knew to what that wire was to be
attached? Common/Hot?
Thanks
Bill
Black is High speed/Cooling speed and the Fan ON continuous speed.a rather small squirrel cage direct drive blower.
I am assuming that the black wire is hot, and the white wire is common. And
then there are three colored wires that I'm assuming are LO, MED, HI
jumpers, but I don't know what they are to be attached to?
I have a Red, a Blue, and an Orange wire. Suppose that the red is HI and the
blue is MED and the orange is LO (just as an example)....does that mean that
the color of my choice needs to be contacting the ground/common or the hot?
I don't understand the theory behind these wires.
Also, there is a capacitor with two terminals on it mounted on this unit.
Both terminals have a brown wire that goes directly into the motor.
The ends of all these wires, including the black and white have just been
cut off blunt, and of course there is no wiring diagram attached to the
blower.
My main question is not to determine which color is which speed, I can
figure that part out on my own *if* I knew to what that wire was to be
attached? Common/Hot?
Thanks
Bill
a motor will work with either leg of power on common, on 230 v motors 2 hot legs are used, regardless the Common terminal and Run winding get the power.
The speeds if more than 1 are on the run winding usually, but some are on the start winding, if in doubt fuse it out, this way the worst that can happen is a blown fuse or the motor runs backwards.
Run and Start will be the 2 leads reading the highest to each other
Common is the point at which the Run winding and Start winding connect, it is not a common winding it is a common point where the 2 windings meet.
The speeds will be as described by the others earlier in that the lower resistance will be higher speeds.