Coupler Set
Screw
45°
Damper
Shaft
End-stop
Set Screws on
End Stops
(2 each)
90°
30°
Stop Gear
60°
10°
Figure 6: Setting the Rotation Range
3. Keeping the actuator parallel to the mounting
surface, continue tightening the coupler set screw
approximately 1/2 turn to achieve 150 to 180 lb∙in
(17 to 20 N∙m) torque.
4. Press and hold the gear release lever, and turn the
coupler by hand to ensure the damper rotates from
end to end.
Proceed to the
DPT-2015
section if needed.
Less Than 90 Degrees
If the damper shaft rotation is less than 90°, the stroke
of the actuator has to be adjusted using the scale on
the actuator. (See Figure 6.)
Use the center of the coupler set screw as a pointer to
observe the position on the scale when rotating the
coupler from one side to the other.
Examples:
•
For a rotation range of 90°, set both end-stop
set screws fully up as shown in Figure 6.
•
For a rotation range of 60°, leave one end-stop
set screw fully up, and adjust the other one, so the
coupler rotates between the 30 and 90° indicator
marks on the scale.
•
For a rotation range of 45°, adjust both end-stop
set screws, so the coupler rotates between 30 and
75°.
•
For a rotation range of 30°, move both end-stop
set screws, so the coupler rotates between the
30 and 60° indicator marks on the scale.
To accurately set the end-stops:
1. Press and hold the gear release lever, and turn the
actuator coupler to the minimum rotation position
for the minimum ventilation flow required.
2. Release the gear release lever.
3. Use a Phillips screwdriver to loosen the end-stop
set screw that is closest to the stop gear. Move the
end-stop set screw in its slot until it is tight against
the stop gear. (See Figure 6.)
IMPORTANT:
Do not remove the end-stop
set screws, as this could interfere with the actuator’s
operation.
4. Hand tighten the set screw so it remains in this
position.
5. Secure the coupler to the shaft by using a crescent
wrench or one of the tools from the Special Tools
Needed section to tighten the coupler set screw
against the damper shaft. (See Figure 6.)
6. Keeping the actuator parallel to the mounting
surface, continue tightening the coupler set screw
approximately 1/2 turn to achieve 150 to 180 lb∙in
(17 to 20 N∙m) torque.
7. Repeat Steps 1 through 3 to set the desired
maximum rotation position.
8. Use the Phillips screwdriver to tighten both
end-
stop set screws to a minimum of 25 lb∙in
(2.8
N∙m).
9. Press and hold the gear release lever, and turn the
coupler by hand to ensure the damper rotates from
end to end.
DPT-2015
The M9106-AGx-2N housing has two mounting bosses
for the DPT-2015. (See Figure 7.) Follow the
procedure in the installation instructions included with
the DPT-2015,
DPT-2015 Differential Pressure
Transmitter for VAV Box Applications Installation
Instructions (Part No. 24-7547-18)
.
COM
CW
CCW
Mounting
Bosses
Figure 7: Location of the Mounting Bosses
M9106-AGx-2N0x Series Electric Non-spring Return Actuators Installation Instructions
3