Approximately
an 1/8 in.
(3.2 mm) Gap
Gear
Release
Lever
Mounting
Surface
DPT-2015
Figure 2: Actuator Position
3. Verify that the shoulder washer is centered
between the plastic ribs of the actuator housing to
allow actuator movement during rotation.
(See Figure 3.)
Shoulder
Washer
Plastic Ribs
Self-drilling
Sheet Metal
Screw
CCW
COM
CW
O
U
T
G
N
D
I
N
(-
)L
O
D
P
T-
20
15
Figure 3: Shoulder Washer Position
4. Hold the actuator in place on the damper shaft,
and insert the self-drilling sheet metal screw
through the shoulder washer. (See Figure 3.)
5. Place a 5/16 in. (8 mm) socket on the screw and
using a drill and extension, drill the screw into the
mounting surface until tight against the washer.
IMPORTANT:
Do not overtighten the mounting
screw to avoid stripping the threads.
Rotation Range
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 4.
Figure 4: Damper Position Icons
To set the actuator stroke, proceed as follows:
1. Grasp the damper shaft firmly with pliers and
rotate the damper fully closed. (See Figure 5.)
Damper
Shaft
CCW to
Close
CW to
Close
Damper
Blade
Damper
Figure 5: Damper Rotation
2. Press and hold the gear release lever shown in
Figure 2, and rotate the actuator coupler to the
fully closed position.
3. Make a note of the rotation travel and direction,
either Clockwise (CW) or Counterclockwise
(CCW), required to close the damper.
If rotation is less than 90°, proceed to
Less Than
90 Degrees
section.
IMPORTANT:
Do not remove the sheet metal
screw and force the damper blade closed by rotating
the actuator. This puts additional stress on the gear
train and could reduce the life of the actuator.
90 Degrees
1. Release the gear release lever.
2. Secure the coupler to the shaft 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.)
2
M9106-AGx-2N0x Series Electric Non-spring Return Actuators Installation Instructions