Has anybody used a Distech RTU-L Controller with a bypass damper and VAV boxes?
Everything is working OK except the bypass damper. With a static setpoint of 1" and static pressure of 1.7", I could not get the bypass damper to move (was stuck at 0%).
After playing with the duct pressure PID loop settings, I was able to get the bypass position to 50%, but then it would stay there even after large changes in static pressure and/or setpoint.
I am not fimiliar with Distech PID loop settings. All of their literature shows examples for space temp, nothing for pressure.
Any help would be appriciated.