M9220-Bxx-3 On/Off Electric Spring Return Actuators Installation Guide
5
Counterclockwise (CCW) Spring Return
Direction – Clockwise (CW) Powered
Operation
For CCW spring return direction, mount the actuator to
the damper shaft so that the Side A of the actuator is
away from the damper as illustrated in Figure 2. With
power applied, the actuator drives CW from the
0° position, and spring returns CCW.
Clockwise (CW) Spring Return Direction –
Counterclockwise (CCW) Powered Operation
To change the spring return direction to CW, mount the
actuator to the damper shaft so that Side B of the
actuator is away from the damper as illustrated in
Figure 3. With power applied, the actuator now drives
CCW from the 0° position, and spring returns CW.
Removable Coupler
The coupler may be installed on either side of the
output hub. If the damper shaft is less than 3-19/32 in.
(91 mm) long, insert the coupler in the face of the
actuator closest to the damper. If the damper shaft is
shorter than 1-5/32 in. (29 mm) long, a shaft extension
is required to mount the actuator.
To change the position of the coupler, see Figure 4 and
proceed as follows:
1. Mount the coupler on either Side A or Side B of the
actuator, as determined by the shaft length.
2. Snap the locking clip securely into the coupler
retention groove to retain the coupler.
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.
Figure 2: Side A of Actuator
A
90
-5
10
20
30
40
50
60
70
80
Manual
Override
Pointer Showing
Actuator in the
Spring Return
Position
Auxiliary Switch
Adjuster Located
on the Right
FI
G
:s
id
ea
Side A: CCW Spring Return Direction
Figure 3: Side B of Actuator
B
90
-5
10
20
30
40
50
60
70
80
Auxiliary Switch
Adjuster Located
on the Left
Pointer Showing
Actuator in the
Spring Return
Position
Manual
Override
FI
G
:s
id
eb
Side B: CW Spring Return Direction
IMPORTANT:
Applying excessive torque to the
manual override or running the manual override with
a power tool may damage the internal components
of the actuator and cause premature failure.
Figure 4: Changing the Position of the Coupler
Shaft Coupler
U-Bolt Nut
and Washer
(Qty Two)
Pointer
U-Bolt
Locking Clip
FIG
:ch
pos
Assembled View
of Coupler
Subassembly
