EWC Controls Forum

Thanks!

Thanks for prompt response. I do have 4 thermostat with the control board i have currently, NCM 300 would work correct? Reason: NCM 300 has limit of 3 zones and if i have 4 zones, do i need to upgrade to something else? Or number of thermostat is irrelevant. Please advise so that i can go ahead with ...

Hi,
I am trying to install a smart thermostat that requires common wire (type c).
Can i get some assistance in locating the common wire in the control board?

Attaching picture of the EWC control board and model
Appreciate your insights