I am replacing the thermostat for my 2 electric baseboard heaters and the replacement unit I bought has 4 wires, red, white, green and black while the old uint had just red and black.
There are 3 white wires, 3 black wires and bare solid copper. I know the green wire connects to bare copper, but I am confused on how to connect the others.
How should I connect the wires?
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