>I have been drawing and redrawing a plan for a down draft table based on a furnace blwoer I have been saving for twenty years.
Today I got it out and sat it on the base. Decided I should try it out and see which wire set which speed. Hooked white to white (sort of dingy tan, but what I took to be white.) Black to black and green to green. It ran for about ten seconds and then smoked and burned. I was going to try the red wire next but I think I'll have to go to plan B. Does anyone see an obvious error or did it just die of dry rot? I have no wiring diagram.
>Don, I was confrinted with six or eight wires. (I took this thing out of the Air handler for a heat pump years ago.) I had taped off three of the wires with electricians tape. They ahd spade connectors on them. So, This time I assumed they were the ones that had been in use. Black, Green and What passed for white (dingy tan). The probelm was that there were two dingy tan/white wires. One with spade conector and one without. I decided to try the three that were taped off, thinking I had done that as a reminder to myself. There was also a red wire with a space connector. I thought I woudl try that later, hoping it was a second speed. When I pluged this thing up the motor ran sort of gently and slowly. Appearred to be a few hundred RPM. I was disapointed in that as I wanted huge volume. At that point I realized it was making a crackling noise and I listed with my ear near the motor for a second or two, deciding if it were debris in it or if it were really arcing. It was really arcing. By the time I made the decision it was burning in the area the wires enter the motor and continued to burn after I unplugged it. For about thirty seconds.
I guess I'm trying to decide if I killed it by hooking the wires up wrong (Useful to know next time I get one) or if it just died because of age and degredation of internal insulation. I never got to the part of switching the wires around for various speeds.
>Key words- air handler for A HEAT PUMP. This means that motor was most likey a 220 volt motor. By using 220, the heat strips and motor can be supplied by same 220 circuit, without having to have a neutral.