OpenAir Non-Spring Return Rotary Electric Damper Actuator
24 Vac Floating Control
Siemens Building Technologies, Inc.
You must place the actuator on the damper shaft so that the front of the actuator is
accessible. The label is on the front side.
The minimum damper drive shaft length is 3/4-inch (20 mm).
1/2 Ø inch Guide
For all damper shafts with the exception of the 1/2-inch round shaft:
Remove 1/2 Ø inch guide before installation.
A mounting bracket is included with the actuator.
Observe the service envelope around the actuator as shown in Figure 25.
Detailed mounting instructions are included with each actuator.
To move the damper blades and lock the
position with no power present:
1. Slide the red manual override knob
toward the back of the actuator.
2. Make adjustments to the damper
3. Slide the red manual override knob
toward the front of the actuator.
Once power is restored, the actuator returns
to automated control
1. Loosen the stop set
2. Move the screw along
the track to the desired
position, and fasten it in
Figure 16. Moving the Mechanical Range Stop.
3/8 Ø inch
Use shaft insert supplied
for any 3/8-in (8 - 10 mm)
Figure 14. Damper Shaft Sizes.
Document No. 155-188P25
December 26, 2007
5/8 Ø inch
Figure 15. Manual Override.