11-01-2016, 09:58 PM
(This post was last modified: 11-01-2016, 11:16 PM by MstrCarpenter.
Edit Reason: typo corrections
)
I have a reasonably large furnace to heat my shop. I"ve also been using the blower (with filters) to circulate the air when the wood stove is burning. It is currently set up so the blower runs continuously when the switch is on; regardless of the exchanger temperature or burner operation. The main reason it is set this way is because the starting windings on the blower motor are shot (I have to get on my knees and "manually" get it started in the right direction).
I have a newer three speed, 1/3 hp Dayton motor sitting on my bench in pieces. I would like to run it on high when the burner is on, then revert to low when the thermostat is satisfied. I think I can figure that out using a DPDT relay when I can get this thing wired correctly. The data plate wiring shows L1=white; L2= black-hi, blue-med, red-low. It also shows connections for an aux. start cap., and swapping yellow and purple wires to reverse rotation. I can only assume this motor originally came with a cable attached similar to this one https://www.amazon.com/Dayton-3LU77-Moto...B001GBTBV6 which would make wiring this quite simple. (It actually looks more like the 1/2 hp motor #3K772 shown lower on that page or here https://www.amazon.com/Dayton-3K772-Moto...KB6EDNWN3B ) All I have are four terminals on a plastic block located behind a small cover plate. There are four wires coming from the windings; red, yellow, blue and black. In my futile attempts to get this thing spinning clockwise I lost track of what went where. It is currently wired so L1 runs through a thermal protector and connects to red and yellow. L2 is connected to blue and a centrifugal switch that connects to the black. The motor does run with these connections in a CCW rotation, however; I didn't let it run but for a few seconds for fear of letting the magic smoke out!
So, finally, here are my questions. Are these connections o.k.? How do I change the rotation? Where would L1 and L2 connect for both high and low speeds? And as a super-duper bonus question, how would I connect a cable, if one should magically appear, with a white, black, blue and red wire, that may or may not have pairs of yellow, purple, and brown wires?
I have a newer three speed, 1/3 hp Dayton motor sitting on my bench in pieces. I would like to run it on high when the burner is on, then revert to low when the thermostat is satisfied. I think I can figure that out using a DPDT relay when I can get this thing wired correctly. The data plate wiring shows L1=white; L2= black-hi, blue-med, red-low. It also shows connections for an aux. start cap., and swapping yellow and purple wires to reverse rotation. I can only assume this motor originally came with a cable attached similar to this one https://www.amazon.com/Dayton-3LU77-Moto...B001GBTBV6 which would make wiring this quite simple. (It actually looks more like the 1/2 hp motor #3K772 shown lower on that page or here https://www.amazon.com/Dayton-3K772-Moto...KB6EDNWN3B ) All I have are four terminals on a plastic block located behind a small cover plate. There are four wires coming from the windings; red, yellow, blue and black. In my futile attempts to get this thing spinning clockwise I lost track of what went where. It is currently wired so L1 runs through a thermal protector and connects to red and yellow. L2 is connected to blue and a centrifugal switch that connects to the black. The motor does run with these connections in a CCW rotation, however; I didn't let it run but for a few seconds for fear of letting the magic smoke out!
So, finally, here are my questions. Are these connections o.k.? How do I change the rotation? Where would L1 and L2 connect for both high and low speeds? And as a super-duper bonus question, how would I connect a cable, if one should magically appear, with a white, black, blue and red wire, that may or may not have pairs of yellow, purple, and brown wires?
Sign at N.E. Vocational School Cabinetmaking Shop 1976, "Free knowledge given daily... Bring your own container"
![[Image: 3-speed-fan-motor-wiring-diagram-l-a4a468426c16fbc3.jpg]](http://graph.darren-criss.org/2016/02/18/3-speed-fan-motor-wiring-diagram-l-a4a468426c16fbc3.jpg)
