Does it take more torque to open a VAV damper than it does to close it?
Have anyone seen an electronic VAV controller that output more torque (in the form of 24VAC) to drive open than to drive close?
I ran into one today. Drive open (voltage output) would turn the motor. Drive close would not. (nothing wrong with the motor)
I put in a (used) slow acting actuator and everything worked. The fast acting actuator did not. I'm thinking: the slower the motor, the less the torque(input) it needs.