Install Instructions

M9208-GGx-x Series Proportional Electric Spring Return Actuators Installation Instructions 5
Manual Override
Use only the supplied manual override crank to
reposition the actuator hub when using the manual
override feature.
To reposition the actuator hub, proceed as follows:
1. De-energize the actuator.
2. Insert the hex end of the manual override crank
into the manual override adjustment point on the
face of the actuator.
3. Rotate the manual override crank in the direction
indicated by the arrow on the label.
4. The actuator requires 8-1/2 manual override crank
rotations from the full spring return position to fully
reposition the actuator hub. At the end of travel, the
rotation resistance increases. Do not force the
manual crank past this point.
5. While holding the manual crank in the wound
position, rotate and hold the red lock shaft
approximately 10° then release the manual crank
to lock the actuator hub in place.
Note: Insert and slightly rotate the manual crank
in the direction indicated by the arrow on the label
to unlock the actuator hub. Alternately, the actuator
hub automatically unlocks when power is applied
to the actuator, and returns the actuator to normal
drive and spring return operation.
Mounting the Actuator
To mount the actuator, proceed as follows:
1. See the dimensions in Figure 5 and Table 2 to
ensure the correct positioning of the anti-rotation
bracket.
2. Bend or cut the anti-rotation bracket to fit the
damper frame or duct as illustrated in Figure 6.
Note: The anti-rotation bracket can be bent to fit a
round damper.
3. Mark or drill mounting holes in the damper frame or
duct using the anti-rotation bracket as a guide
(based on the measurements obtained in Table 2
and Figure 5).
4. Secure the anti-rotation bracket to the damper
frame or duct using the two No. M3.5 x 9.5 mm
self-drilling sheet metal screws provided.
5. Slide the actuator onto the damper shaft, and
position the anti-rotation bracket tab into the slot at
the bottom of the actuator as illustrated in Figure 6.
IMPORTANT: Applying excessive torque to the
manual override or operating the manual override
with a power tool may damage the internal
components of the actuator and cause premature
failure.
Table 2: Dimensions from Anti-Rotation Bracket
to Shaft Center
Shaft Diameter,
in. (mm)
Dimension A,
in. (mm)
Dimension B,
in. (mm)
5/16 to 5/8 (8 to 16) 5-7/16 (138.4) 4-5/32 (105.6)
1/2 to 3/4 (12 to 19) 5-13/32 (137.4) 4-1/8 (104.6)
IMPORTANT: The tab on the anti-rotation bracket
must fit midpoint in the actuator slot. Positioning the
tab midpoint in the slot prevents actuator binding
and premature wear, and makes actuator removal
easier.
IMPORTANT: Do not overtighten the mounting
screws to avoid stripping the threads. Be certain that
the tab on the anti-rotation bracket remains properly
positioned in the slot on the actuator, and that the
actuator remains parallel to the mounting surface.
Figure 5: Positioning the Anti-Rotation Bracket
FIG:M9208_GGx_Position_Brkt
8
.
5
x
D
I
M
.
A
D
I
M
.
B
8
.
5
x
2- 10
0-100-10
2- 10
+
CAL
DA
RA
+
2-10
0-100-10
2-10
+
CAL
DA RA
+