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OpenAir GEB Series Enhanced Rotary Non-Spring Return Damper Actuators
Sizing
The type of actuator required depends on several factors:
1
for unaccountable variables such as slight misalignments, aging of the damper, and so on. A
suggested safety factor is 0.80.
Mounting and
Installation
Manual Override
Siemens Industry, Inc.
1. Obtain damper torque ratings (ft-lb/ft
2. Determine the area of the damper.
3. Calculate the total torque required to move the damper:
Torque
Total Torque =
Safety Factor: When calculating the total torque required, a safety factor should be included
•
Place the actuator on the damper shaft so that the front of the actuator is accessible.
(The label and the manual override button are on the front side.)
•
The minimum damper drive shaft is 3/4-inches (20mm). The shaft length determines
whether the shaft adapter will be mounted on the front or back of the actuator.
•
See Specifications for minimum and maximum damper shaft dimensions.
•
Set auxiliary switches, DIP switches, and Offset/Span as required by your
application. (See following sections for details.)
•
The position indicator can be mounted to show either the clockwise or
counterclockwise 0 to 90 scale.
•
A mounting bracket is included with the actuator.
•
The shaft adapter and mounting parts are shipped in a separate container with the
actuator.
•
The actuator is shipped from the factory with a 5° pre-load to ensure tight damper
close off.
•
Detailed mounting instructions are included with each actuator.
To move the damper blades
and lock the position without
power present:
1. Hold down the PUSH
button.
2. Make adjustments to the
damper position.
3. Release the PUSH button.
Once power is restored, the
actuator returns to automated
control.
2
2
or Nm/m
) from the damper manufacturer.
Rating
Damper
Area
1
SF
Figure 8. Manual Override.
Technical Instructions
Document Number A6V12029156
December 16, 2021
Page 7
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