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Author Topic: thermostat wiring  (Read 27950 times)

RSI

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Re: thermostat wiring
« Reply #45 on: November 06, 2013, 04:43:45 PM »
Don't you have A/C?
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jksweld

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Re: thermostat wiring
« Reply #46 on: November 06, 2013, 04:45:24 PM »
not central i used window a/c this summer
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RSI

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Re: thermostat wiring
« Reply #47 on: November 06, 2013, 05:04:17 PM »
Oh, well then the cooling relay is currently unused? If so, you may be able to just use it without the extra. What voltage is the coil and does it have any wires going to it? If it does, where do they go?
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jksweld

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Re: thermostat wiring
« Reply #48 on: November 06, 2013, 05:30:01 PM »
The cooling relay reads     Contact Rating
                                          12AFL 60ALR 125V
                                          6AFL   35ALR 250V
                                          60HZ

It has 2 wires on it and a total of 6 spade terminals. One wire is on #4 and it goes to the sequencer with 120V on it. The other wire is on #5 and it goes to the blower fan and it also has 120V. Both have power and the furnace isnt running.
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RSI

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Re: thermostat wiring
« Reply #49 on: November 06, 2013, 05:40:25 PM »
What about the coil connections? It may be a separate label. Are the coil connections empty?
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jksweld

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Re: thermostat wiring
« Reply #50 on: November 06, 2013, 05:47:53 PM »
Im not sure what your meaning by the coil? I dont think there is one
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RSI

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Re: thermostat wiring
« Reply #51 on: November 06, 2013, 06:27:36 PM »
A relay has to have a coil. Is there a part number on the relay?
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jksweld

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Re: thermostat wiring
« Reply #52 on: November 07, 2013, 05:21:49 PM »
took the cooling relay off and this is what was on the other side   coil 24V 60CY
                                                                                                        91-122000-11000
and on the bottom is A11B

So Im assuming it has a built in coil and it looks like all the spade terminals have been connected once upon a time
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jksweld

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Re: thermostat wiring
« Reply #53 on: November 07, 2013, 06:03:21 PM »
heres a quick paint drawing of the cooling relay and of what I just discovered!!!!
« Last Edit: November 07, 2013, 06:06:04 PM by jksweld »
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RSI

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Re: thermostat wiring
« Reply #54 on: November 07, 2013, 06:29:23 PM »
Where are the two black 24v wires going? Those are the coil wires.
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jksweld

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Re: thermostat wiring
« Reply #55 on: November 07, 2013, 06:34:48 PM »
they come out of the coil and go to the underside of the spade terminals on the side markered 24V coil. Meaning the top side of the spade is able to have a 24V wire hooked on it
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RSI

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Re: thermostat wiring
« Reply #56 on: November 07, 2013, 06:36:42 PM »
Ok, then you should be able to just run 24v to those connections and the blower should come on. If you run a test wire to it and the fan speed is acceptable then you can wire in the thermostat to run it.
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jksweld

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Re: thermostat wiring
« Reply #57 on: November 07, 2013, 06:41:06 PM »
Ok, so if I unhook my 24V wires going up to the lugs for Tstat now and put one on one terminal and one on the other termianl then the fan should kick on correct??
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RSI

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Re: thermostat wiring
« Reply #58 on: November 07, 2013, 06:53:11 PM »
No, that won't do anything.
What are the connections labeled where the thermostat is currently connected? Are there any unused connections there?
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jksweld

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Re: thermostat wiring
« Reply #59 on: November 07, 2013, 06:55:22 PM »
it just says heat and red on one screw and white on the other
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