Luxpro PSP721U Thermostat with EWC-ST-2E

[rajv]

Hi,
I had my furnace serviced and I had the HVAC guy fit in a digital prog. thermostat from nationalgrid. (PSP721U)

He had trouble connecting the wires and finally matched with the EWC-ST-2E zone control circuit diagram. The furnace works and the thermostat seem to work fine and furnace shuts off when the thermostat asks to stop.

Now, I reviewed the EWC-ST-2E supported thermostat and Luxpro PSP721U is not listed. Can one of you experts tell if it is OK to use a thermostat that is not listed in the EWC support manual? Will this damage the Furnace or the zone control unit?

Thanks!

[Erik W.]

That thermostat will work fine with your panel and you don't have to worry about it damaging anything. The thermostats that are listed are just a few recommendations but the only guideline your thermostat needs to follow to be compatible with that panel is a separate o and separate b terminal which your thermostat has.

Erik