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Mystery wire on line volt thermostat
I have line volt thermostats for each of the baseboard heaters in my
condo. The thermostats are old analog and ugly. I want to replace them with electronic thermostats. I pulled one of the old thermostats off the wall to check the wiring. A single pole should have 2 wires, while a double pole has four. My thermostats have 3 wires plus a ground. One red, one black and one white. On the electrical panel, there are 2 breakers for the heat, so I'm assuming it's 240 volts to the heaters. I've looked for hours on the web, and I can't find an example wiring diagram that matches what I have. Any ideas or suggestions? The mini wiring diagram on the old thermostat shows it to be a single pole with one wire to line and one to load. No mention of the third wire at all, making it rather useless. Thanks in advance! |
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