I took out the old thermostat & now have a small problem with putting on the new one. Three cables come into the wall box for the control, each cable has three wires. The old thermostat had black wires from two cabels pigtailed to a black wire in the back of the control. The third black wire was wire nutted to a red wire in the back of the control. White & bare copper wires from each cable are wire nutted together.
The new programable thermostat has two black & two red wires coming out of the back. The reds are labeled "T1" & "T2". The black ones are "L2" & "L1".
No other heaters are on the circurt (though I would like to change that).
I'm confused which wires coming from the wall to attatch to which wires on the thermostat.
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