Question about Heating & Cooling
I've replaced a Williams wall gas heater non-electric. The thermostat is connected right and mounted on the wall. But, there's a thick black copper wire on the side of the furnace tagged thermostat. I don't know what to do with it? Where do you connect this wire? When it touches the top screw of the three screws running vertically(where the other wires are connected). The burner lights up and stays on, even if you play with the wall thermostat. Touching the other two screws doesn't do anything. Now, the manual talks about connecting it to the venting wires? Extra wires coming from the top or maybe somewhere else in the wall? I've left it connected to the first screw, ran the heater. But, it never turns off? Any suggestions? Thanks
First make sure this is a heater set up for a remote mounted thermostat. If so, the gas valve has 3 screws labeled TH (thermostat) and TP (thermopile) that's the flame sensor with 2 wires coming off it, I don't know where the goofy name comes from. there will be one screw that has both, usually the top one. Wire accordingly. The new valves have a solenoid on the bottom. this connects to the high temp. sensor up top. It has 2 wires on it, one connects to the thermostat wire, the other goes to the screw with TH and TP. Or you can skip it and connect the wire from the back of the valve to the Th and TP screw. Make sure the thermostat wires aren't pinched somewhere, thus eliminating the thermostats control.
Posted on Mar 02, 2008
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Posted on Jan 02, 2017
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