EWC Controls Forum

I have an EWC ULTRA-ZONE with 3 zones and 4 dampers. Zone 1 has 2 dampers for the 1st and 2nd floor, Zone 2 has a damper for the basement and Zone 3 has a damper for a room above the garage. All have 3 wires to the actuators from the control box. None have model or serial number info on them.

One ...