Slide switch position

[Glenn14]

The slide switches on my EWC-OR-6 Ultra Zone controller panel are all set to "O" (Open). Is this the typical setting? Intuitively, to me it seems like "C" would be the normal position. The description says: "In C position, the zone damper stays closed unless thermostat is calling." Isn't that what I want for normal heating & cooling?

The instruction also says" In O position, the zone damper opens when all zone thermostats are satisfied. Use O position for continuous air circulation operation." I don't run the system for continuous air circulation. I think this means fan only.

So the question is: should I change all slide switches to the C position?

Thanks in advance!

[Paul Z.]

We leave all zone dampers open at the end of a call to purge all remaining heated air from the system. Closing all dampers at the end of a heating call trap heated air within equipment, which can lead to further problems. Give us a call at 1800-446-3110 X490.