Data Sheet for Product

OpenAir™ GBB/GIB Series Non-spring Return, 24 Vac, Floating Control Technical Instructions
Document No. 155-177P25
August 6, 2019
Siemens Industry, Inc. Page 9
Manual override
To move the damper blades and lock
the position with no power present:
1. Determine damper rotation:
clockwise or counterclockwise.
2. Hold down the PUSH button.
3. Make adjustments to the damper
position.
4. Release the PUSH button.
Once power is restored, the actuator
returns to automated control.
Figure 15. Manual Override.
Mechanical range
adjustment
The angular rotation is adjustable between 0 and
90° at 5-degree intervals. The range of shaft
movement is limited by mounting the shaft
adapter:
Begin by loosening the shaft adapter from the
damper shaft and remove the actuator from the
damper shaft.
1. Remove clip.
2. Remove shaft adapter from the actuator.
Figure 16.
Figure 17.
Figure 18.
Figure 19.
3. Return the actuator gear train to the 0 position using the following steps for the
clockwise or counterclockwise damper shaft rotation.
Clockwise-to-open:
a. Insert the shaft adapter to the right as close as possible to the raised stop.
See Figure 17.
b. Hold down the PUSH button and rotate the shaft adapter to the left until it
stops. See Figure 18.
c. Release the PUSH button.
d. If the shaft adapter is not resting against the left raised stop, remove the
adapter and insert it against the left stop.
e. Place the position indicator to the "0" position on the outside scale. See
Figure 19.