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Author Topic: hooking thermostat to a oil fired furnace w/owb  (Read 20829 times)

Bull

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Re: hooking thermostat to a oil fired furnace w/owb
« Reply #15 on: November 09, 2011, 07:14:08 PM »

When you get inside of the furnace I am lost, I just hooked mine up to the thermostat that is on my electric furnace. To the wire that makes the fan run all the time and broke it with a 2 wire thermostat. I keep the electric furnace thermostat set to 65 and the other (OWB) set to 72.
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RSI

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Re: hooking thermostat to a oil fired furnace w/owb
« Reply #16 on: November 09, 2011, 07:45:56 PM »

Can you get at the wires on the 3 position switch?
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pintopaul

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Re: hooking thermostat to a oil fired furnace w/owb
« Reply #17 on: November 10, 2011, 01:44:24 PM »

yes i can get to the 3 wires on the switch they are slip connectors .
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RSI

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Re: hooking thermostat to a oil fired furnace w/owb
« Reply #18 on: November 10, 2011, 02:00:51 PM »

Is the switch on the furnace? If you have it on fresh air will the furnace still fire if you turn up the thermostat?
How big are the wires going to the switch?
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pintopaul

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Re: hooking thermostat to a oil fired furnace w/owb
« Reply #19 on: November 10, 2011, 02:50:24 PM »

yes the switch is on the furnace, no when switched to fresh air just the fan comes on but stays on till i switch it of or to on for firing the furnace . they are normal size wires like maybe a 14 guage wire like the rest of the wires. RSI i think your the one i sent pictures to if you want i have unlimited text if youd like to text me. dont mean to rush anyone but i need to get this working as soon as possible because of my work if starts to get cold and snows i'm not home much ...thanks paul 518 335 3883 cell
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RSI

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Re: hooking thermostat to a oil fired furnace w/owb
« Reply #20 on: November 10, 2011, 03:13:49 PM »

You are sure the burner won't fire with the switch the fan on position? Without being there is is hard to say if it would be a problem but it sounds like you should be able to take the wire off the switch for the fresh air setting and connect the relay module you have to that wire and to the common connection on the switch. (probably the center but not always)

TO test it I would try putting the wires together and see if it works before hooking up the relay. When they are jumpered together the fan should keep running and the oil furnace should fire like normal  if the thermostat is turned up.

If that works, on your relay module, connect the black and white wires to 120v power.
Black and red wires to wire removed off switch and common on switch (you need to add to existing wire)
Connect the R to the R on the thermostat and the W to the W on the thermostat.
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pintopaul

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Re: hooking thermostat to a oil fired furnace w/owb
« Reply #21 on: November 10, 2011, 03:49:15 PM »

ok put the 2 wires togeither sparked but did not start the blower. i took pictures of the switch and wiring i'm sending them your way if your cell was the 608
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RSI

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Re: hooking thermostat to a oil fired furnace w/owb
« Reply #22 on: November 10, 2011, 04:28:03 PM »

Which two wires did you put together?
Are there any markings on the switch by the terminals? (Something like NC, NO, COM)
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pintopaul

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Re: hooking thermostat to a oil fired furnace w/owb
« Reply #23 on: November 10, 2011, 04:52:49 PM »

ok on the fresh air side of the switch its orange witch goes to the fan sensor and the black wire witch is in the center of the switch
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RSI

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Re: hooking thermostat to a oil fired furnace w/owb
« Reply #24 on: November 10, 2011, 05:21:53 PM »

If you put those two wires together does the blower run?
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pintopaul

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Re: hooking thermostat to a oil fired furnace w/owb
« Reply #25 on: November 10, 2011, 05:47:40 PM »

no blow dose not run if i touch these 2 wires togeither, i looked at the wires the blue one is on the on setting like if the furnace is to fire normally hooks to one side of the limit and fan switch,black wire is in the center of the switch witch goes to the main 2 wires coming in ,3rd wire is orange and goes to the other side of the limit switch and fan switch.
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RSI

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Re: hooking thermostat to a oil fired furnace w/owb
« Reply #26 on: November 10, 2011, 07:41:29 PM »

If it doesn't turn on the fan but flipping the switch does then that means you have the wrong wires.
What happens if you put them all 3 together?
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pintopaul

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Re: hooking thermostat to a oil fired furnace w/owb
« Reply #27 on: November 10, 2011, 08:14:48 PM »

if you read my last post , i think the blue and orange might fire the blower but im getting nervise touching wires togeither i really dont want to burn something up.
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RSI

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Re: hooking thermostat to a oil fired furnace w/owb
« Reply #28 on: November 10, 2011, 08:19:29 PM »

Do you have a multimeter?
We just need to know if the furnace will still operate normally with the fan running or if it will backfeed and make it do something it shouldn't.

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pintopaul

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Re: hooking thermostat to a oil fired furnace w/owb
« Reply #29 on: November 11, 2011, 08:29:28 AM »

i would be happy right  now if i could figure out how to make the furnace stop firing so i could just use the blower either way right now would be great.
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