EWC Controls Forum

Yes, there is a bypass damper. There are 2 zones supplied by 4 dampers. One zone is the 1st floor and the 2nd is the basement. The problem occurs when only the primary upstairs zone is running. Off the top of my head I cannot verify 100% if the rattle is also occurring when the downstairs zone is ...

Hello, I have a MA-ND4 actuator and damper installed on my air handler. When the system calls for AC the damper functions (opens and closes) just fine. The issue I have is that when the blower on the unit increases speed for the AC airflow the damper rattles. I am getting some kind of flutter in the ...