You install the MP-V directly over the VAV damper shaft for damper positioning control and air flow sensing. When you install the MP-V on a damper that rotates counter-clockwise (CCW) to open, use WorkStation or the Commission mobile application to ensure that the configured direction of the actuator rotation matches the damper type.
Refer to the dimensional drawing before installing the MP-V.
Ensure that the damper is of the type that opens by turning the damper shaft counter-clockwise (CCW).
Determine the damper shaft length (L) and diameter (D).
When the exposed damper shaft length (L) is less than 54 mm (2.125 inches) but greater than 22.2 mm (0.875 inch), move the two damper shaft mounting screws to the alternative screw holes for shorter damper shaft lengths.
Pour plus d'informations, voir Moving the Damper Shaft Mounting Screws to the Alternative Positions for Short Shafts Only on MP-V .
When the damper shaft diameter (D) is equal to 9.5 mm (0.375 inch), install an AM-135 shaft adapter on the damper shaft.
Pour plus d'informations, voir Installing an AM-135 Shaft Adapter on a 9.5 mm (0.375 inch) Diameter Damper Shaft .
Rotate the damper shaft to fully closed (CW) position.
Press and hold the manual override button and rotate the actuator collar to fully closed (CW) position.
Release the manual override button. If necessary, rotate the actuator collar slightly to make the button return to the fully extended position.
Loosen the two damper shaft mounting screws using a 1/8-inch hex key and slide the controller over the damper shaft until the anti-rotation clip comes in close contact with the mounting area on the VAV box.
When necessary due to mounting area restrictions or obstacles, the anti-rotation clip can be moved from the mounting bracket at the bottom of the controller (factory delivered location) to the mounting bracket on the side of the controller (alternative location).
To preload the damper for closed position, rotate the controller counter-clockwise (CCW) about three degrees or 10 mm (0.4 inch) off centerline of the damper.
Tighten the two damper shaft mounting screws to the recommended torque using a torque wrench. For steel damper shafts, 6.8 to 7.9 Nm (60 to 70 lbf.in) is recommended. For aluminum damper shafts, 4.0 to 5.1 Nm (35 to 45 lbf.in) is recommended.
When using the alternative positions for shorter damper shaft lengths, tighten the mounting screw that can be accessed, rotate the hub 90 degrees counter-clockwise (CCW) and tighten the other screw, then rotate the hub back 90 degrees clockwise (CW). Recommended screw tightening torque:
Steel damper shafts: 4.5 to 5.6 Nm (40 to 50 lbf.in)
Aluminum damper shafts: 4.0 to 5.1 Nm (35 to 45 lbf.in)
When using an AM-135 shaft adapter, position the cutout section of the adapter cylinder to match the damper shaft mounting screw positions, before you tighten the screws against the damper shaft through the cutout section. Do not tighten the screws against the adapter cylinder.
Rotate the controller clockwise (CW) back into alignment with the centerline of the damper. The damper should now be tightly closed.
Using the controller's anti-rotation clip as a template, mark and drill a pilot hole in the VAV box.
Ensure the mounting hole position does not affect the performance of the VAV terminal unit. If the damper movement is affected, install the anti-rotation clip in the mounting bracket on the side of the controller (alternative location).
Secure the anti-rotation clip to the VAV box using a #10 self-tapping sheet metal screw.
Press and hold the manual override button and rotate the damper counter-clockwise (CCW) to fully open position by rotating the damper shaft.
Release the manual override button. If necessary, rotate the actuator collar slightly to make the button return to the fully extended position.
Loosen the CCW travel adjustment screw using a 1/4-inch hex key, slide the screw to the damper position indicator, and tighten the screw to 1.4 to 2.0 Nm (12 to 18 lbf.in) using a torque wrench.
Loosen the screw only a quarter of a turn.
Verify that damper can rotate freely between the fully open and fully closed positions. There must be no binding between the actuator and damper, or obstructions hindering the damper operation.
In WorkStation, ensure that Counterclockwise to open is the chosen direction of the actuator rotation to open the damper.
Pour plus d'informations, voir Configuring Flow Balance Data .
With the Commission mobile application, you can manually check the direction of the actuator rotation to verify that the actuator rotates counter-clockwise (CCW) to open the damper. Pour plus d'informations, voir Vérification manuelle de la direction de la rotation du clapet .