EWC Controls Forum

OK - I am starting to figure out a few things. The previous owner put the damper moter arm on 180 degrees from where it should be and wired the zone 2 terminal to the zone 1 damper and vise versa. When I put 24 vAC on terminal 4 of the damper motor it closed the damper and terminal 6 opened the ...

I am having a problem with my dual zone HVAC. I have 2 TH8110U1003 tstats. One upstairs and one downstairs with an EWC-ST-2E control panel. It is standard Heat and A/C. The upstairs is the main tstat and seems to function correctly. However, if the downstairs calls for cool when the upstairs is ...