I'm trying to use a Nest E thermostat on a very old gas wall heater system (no fan). The existing Gas Heater system runs 2 wires (one black and one white) to the old style millivolt thermostat on the wall (which I want to replace with the Nest E). I know I need to add in a 24VAC Transformer. I think the wiring should be as follows:
24V White - C tab
24V Black - R tab
Gas Heater Black - R tab
Gas Heater White - W tab
In other words - two wires go into the R tab on the Nest E
Can someone confirm this is correct. Or please clarify the right connections. A link to a video would be much appreciated.
Thanks !!!
