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OpenAir™ GLB Enhanced Non-Spring Return Rotary Electronic Damper Actuator
Sizing
Mounting and
Installation
1/2-inch Ø
Factory-Installed
Guide
NOTE:
Siemens Industry, Inc.
The type of actuator required depends on several factors.
1. Obtain damper torque ratings (ft-lb/ft
manufacturer.
2. Determine the area of the damper.
3. Calculate the total torque required to move the damper:
Total Torque =
1
Safety Factor: When determining the torque of an actuator required,
a safety factor should be included for unaccountable variables such as
slight misalignments, aging of the damper, and so on. A suggested
safety factor is 0.80 (or 80% of the rated torque).
4. Select the non-spring return actuator type from Table 3.
Total Torque
<44 lb-in (<5 Nm)
<88 lb-in (<10 Nm)
<132 lb-in (<15 Nm)
<221 lb-in (<25 Nm)
<310 lb-in (<35 Nm)
>310 lb-in >620 lb-in
(>35 Nm to >70 Nm)
Place the actuator on the damper shaft so that the front of the actuator is
accessible. The label is on the front side. A mounting bracket is included with the
actuator.
The minimum damper drive shaft length is 3/4-inch (20 mm).
Observe the service envelope around the actuator as shown in Figure 28.
Detailed mounting instructions are included with each actuator.
Use the shaft insert supplied for any
3/8-inch (8 to 10mm) diameter shaft
Figure 15. Damper Shaft Sizes.
For all damper shafts with the exception of the 1/2-inch round shaft: Remove
the 1/2-inch Ø factory-installed guide before installation.
2
Torque Rat
ing
Table 2.
Use tandem mounting bracket ASK73.1 with
any GIB1x actuator.
3/8-inch Ø
Technical Instructions
Document Number 155-785
January 20, 2017
2
or Nm/m
) from the damper
Damper Ar
ea
1
SF
Actuator
GDE
GLB
GEB
GBB
GIB
5/8-inch Ø
Page 9
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