The MP-V software automatically performs an actuator travel and damper position calibration when the MP-V is powered up. The calibration operation drives the damper actuator in the close direction and registers the position when the actuator encounters the stop. The software then drives the actuator in the open direction and registers the position when the stop is encountered. The software uses that information to scale the 0 to 100% span. Mechanical obstructions hindering the damper actuator rotation during the calibration process can adversely affect the calibration results and thus the VAV damper operation. In that case, you can run a recalibration.

Notice:

• Ensure that the MP-V is properly installed and secured prior to application of the 24 VAC power.

• Ensure that the MP-V damper actuator can rotate freely between the fully open and fully closed positions.

Failure to follow these instructions can result in the VAV damper not being properly controlled by the MP-V.