EWC Controls Forum

Patrick, one final question. So in diagram #10, should the R & R1 terminals be jumpered or not? It is not clear to me with the dashed lines between terminal blocks. Thanks.

I live in SE Texas and have an EWC-ST-2D with two zones (gas heating and A/C). I am like stefandalan with both thermostats being old mercury bulb Ultra-Zone type 1F35-613. I assume the Honeywell Model TH4110D1007 would be compatible for my zone 1 thermostat as well? If so, which wiring diagram would ...