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Old 09-25-2009, 08:35 PM   #1
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wood boiler set up


Hello I am currently putting in a indoor wood boiler. It will be used with a Hot air furnace. I currently have everthing plumbed with no problems. I have a heat exchanger that is in the ductwork. My question is how do I get the fan of my Bryant plus 90 gas furnace to come on & off with a separate thermostat? Can I just wire the second thermostat to the G & R terminals? I want the gas furnace to still take over the heating requirments if the fire goes out.

Thanks,
Scott

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Old 09-26-2009, 04:44 PM   #2
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wood boiler set up


Use a relay so the low voltage circuits stay separated.

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Old 09-26-2009, 05:57 PM   #3
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wood boiler set up


I was thinking of wiring in a relay like you said. But what will happen if I run 110 volts into the motor that already gets 110 from the furnace? Would I need to put in diodes?
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