Wiring Limit Control On Gas Boiler - HVAC - DIY Chatroom Home Improvement Forum

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Old 11-21-2008, 08:09 AM   #1
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Wiring limit control on gas boiler

I'm Looking for some help on wiring up my boiler, I have 6 wires That connect to the limit & circulator dials .. I'm not certain as to where the to connect the gas wires & thermostat wires, The limit closes on rise & the circulator closes on rise.. I've tried to hook up the gas & thermostat on the limit dial .. But boiler kept on heating.. Triggered the pressure valve & had a big mess... I've tried to search for wiring diagrams on the internet.. but had no luck... Thanks


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Old 11-21-2008, 12:18 PM   #2
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not sure about having six wires but since i only see 4 contacts ill assume two of the thermo wires just get wirenutted the other 2 wires go on the limit (if the wires are the same colors match colors, if you have red and white than put the reds in a wirenut and break white thru the limit) on the circ one wire in (should be supplying 120v) and 1 wire out to circ pump
i think the limit should kick out at 180 and the circ on at bout 120


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Old 11-21-2008, 01:54 PM   #3
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Limit should open on rise.
Thats how it shuts the burner off, by opening the circuit.
Might have a bad limit.
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