I am trying to connect to an existing two wire system that controls electric baseboard radiators. The wires come from a Singer Model 5262-C Thermostat controller (24v .15 amps) that controls the 240 V baseboard heaters. When connected the Nest Thermostat it asked for a C wire. I looked at Nest's Power connector and from what I can see there is no place to attach at the controller to pick up continuing power (C wire). Are there any other options? I note that we had an earlier version of the Nest Thermostat connected to an identical system with two wires and it works very well without a C wire.
