2
M9106-xGx-2 Series Electric Non-Spring Return Actuators Installation Instructions
2. Bend or cut the anti-rotation bracket to fit the
damper frame or duct as shown in Figure 2.
No. 12-24 Sheet
Metal Screws (2)
Cover
Screw
Slot for
Bracket
Anti-rotation Bracket
Anti-rotation
Bracket Tab
Damper
Frame
Figure 2: Anti-rotation Bracket Positions
3. Close the damper.
4. Insert the anti-rotation bracket tab into the slot at
the bottom of the actuator (shown in Figure 2), and
slide the actuator onto the shaft.
5. Refer to the “A” Dimensions in Table 1 and
Figure 1 to position the anti-rotation bracket tab
midway in the actuator slot.
IMPORTANT:
The anti-rotation bracket tab
must be placed midway in the actuator slot to
prevent actuator binding and premature wear.
6. Use the anti-rotation bracket as a guide, and drill
the holes in the damper frame or duct for the
bracket (based on the measurements obtained in
Table 1 and Figure 1).
Note:
When installing the actuator to a
Johnson Controls damper, use the existing holes in
the damper frame.
7. Attach the anti-rotation bracket to the damper
frame or duct with the two self-tapping screws
provided, using a 1/4 in. (7 mm) flat-blade
screwdriver or 5/16 in. (8 mm) nut driver.
IMPORTANT:
Do not overtighten the mounting
screws to avoid stripping the threads.
8. Secure the coupler to the shaft using a 5/16 in.
(8 mm) square socket or 3/8 in. (10 mm) 12-point
socket to tighten the coupler set screw against the
damper shaft. (See Figure 1.)
9. Continue tightening the coupler set screw to
achieve a torque of 150 to 180 lb∙in
(17 to 20
N∙m).
Note:
Keep the actuator parallel to the mounting
surface while tightening the set screw.
10. Press and hold the gear release lever, and turn
the shaft by hand to ensure the damper rotates
from its fully closed to fully open position.
11. Release the gear release lever.
Rotation Range
The damper must be checked as follows:
1. Make sure that the damper blade is visually
accessible or its position is permanently marked
on the end of the damper shaft as shown in
Figure 3.)
Figure 3: Damper Position Icons
2. Grasp the damper shaft firmly with a pliers and
manually turn the damper to fully open.
90 Degrees
If the damper shaft rotation is 90°:
1. Press and hold the gear release lever shown in
Figure 1, and rotate the actuator coupler and
damper shaft to the fully closed position as shown
in Figure 4.
Damper
Damper
Shaft
Damper
Blade
CCW
to
Close
CW
to
Close
Figure 4: Damper Rotation
2. Note the rotation travel (30 to 90°) and direction,
either Clockwise (CW) or Counterclockwise
(CCW), required to close the damper.
If rotation is less than 90°, proceed to the
Less
than 90 Degrees
section.
3. Release the gear release lever.