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Old 12-09-2008, 07:16 AM   #1
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wiring 2 hi/low/limit switches in parallel


Okay so after trying to dial in my new furnace still, I am noticing something. the fan switch is located at the back of the plenum. the wood fire box is in the front. almost all of the ducts are towards the front.

I have been noticing that the front of the plenum is significantly hotter than the back where the fan switch is, also the part of the room where the front of the furnace is warmer than the back because of the door on the firebox.

Make sense so far?

I think that the temp settings are skewed and messing things up. I have it set at low 100, hi 150 and limit 230, but i am gessing that the front of the plemun is probably more like 165-175 before the back is 150.

My uncle suggested adding a second fan switch in the FRONT, wired in parrallel to the existing one, so that the rear one would be more acurate for when the oil burner comes on.

how would I wire it in parrallel? should I ask this in electrical wiring instead?


btw, the furnace is a newmac wood/oil combo
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Old 12-10-2008, 12:12 PM   #2
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wiring 2 hi/low/limit switches in parallel


If the fan limit wires are in a juntion box.
Just run a second set of wirs from the new fan limit to the same juntion box, and tap into teh wires hooked to teh fan side.
DO NOT parralel wires with the liimt.
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Old 12-11-2008, 09:08 AM   #3
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wiring 2 hi/low/limit switches in parallel


Quote:
Originally Posted by beenthere View Post
If the fan limit wires are in a juntion box.
Just run a second set of wirs from the new fan limit to the same juntion box, and tap into teh wires hooked to teh fan side.
DO NOT parralel wires with the liimt.
Maybe I used the wrong word, should have been series?

Anyhow, the wires going to the current switch do come from a jbox, but there is alot going on in there and I think I may be over fill if I add more...
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Old 12-11-2008, 01:50 PM   #4
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wiring 2 hi/low/limit switches in parallel


In series. The fan wouldn't come on until both fan controls are calling.

You could wire the fan side parralel, and the limit in series.
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