Installation Instructions
Document No. 129-402
October 2, 2009
OpenAir™ GND Series Electronic Damper Actuator
Designed for UL Listed Fire/Smoke and Smoke Control Dampers
a. Actuator
b. Hex key – 3mm
c. Eyelet and 1/4-inch hex head screw
Figure 1. GND Actuator Parts.
Product Description
Step-by-step description for direct-coupled mounting
of the OpenAir GND fast-acting two-position rotary
electronic damper actuator. Actuator is intended for
control of approved fire and smoke leakage-rated
HVAC dampers.
Product Numbers
Prerequisites
WARNING:
Do not open the actuator housing.
Installation
GND12x.1x
GND22x.1x
GND32x.1x
Warning/Caution Notations
WARNING:
Personal injury/loss of life may
occur if you do not follow a
procedure as specified.
CAUTION:
Equipment damage or loss of
data may occur if you do not
follow a procedure as
specified.
Figure 2. Actuator Mounting Orientation.
Required Tools
•
3 mm hex wrench (provided)
•
No. 2 Phillips screwdriver
•
1/4-inch (6.4 mm) hex driver
•
Marker or pencil
Figure 3. Actuator Internal End Stops.
Item Number: 129-402, Rev. BA
Page 1 of 5
Document No. 129-402
Installation Instructions
October 2, 2009
Figure 4. Shaft Length and Proper Shaft Adapter
Location.
Figure 7. Tighten Conduit Screws
(No. 2 Phillips Driver).
Manual Override
For adjustment of the damper/actuator when there is
no power.
CAUTION:
Apply 60 in-lb to 90 in-lb
(7 Nm to10 Nm) maximum
torque to the shaft fixation
set screws.
All four screws must be
ti ht
d
CAUTION:
Always turn key in
direction of the
arrow.
Figure 5. Fasten the Shaft Adapter to
the Damper Shaft.
Figure 8. Manual Override.
Figure 6.
1.
Insert the eyelet through housing ear.
2.
Insert screw through eyelet and tighten using
1/4-inch (32 mm) hex driver.
Page 2 of 5
Siemens Industry, Inc.
Document No. 129-402
Installation Instructions
October 2, 2009
Wiring Diagrams
NOTE:
All wiring must conform to NEC and local codes and regulations.
Function
24 Vac/dc
Supply
Color
Red
Neutral
Black
Ground
Green
Function
120 Vac
Color
Line
Black
Neutral
White
Ground
Green
CAUTION:
Function
230 Vac
Color
Line
Brown
Neutral
Blue
Ground
Green
Switch
Fixed Dual
End Switches
The actuator must be wired
with a 230 Vac line with
respect to neutral. The
ground lead must be
connected for proper
protection of the actuator.
Any other connection, such
as phase-to-phase, can
damage the actuator.
Wire
Color
Switch
Makes
Switch
Breaks
5°
Gray
< 5°
> 5°
85°
Yellow
> 85°
< 85°
NOTE:
Both sets of contacts are open when actuator
is between 5° and 85°.
CAUTION:
Mixed switch operation to the switching outputs
of both dual end switches (5° and 85°) is not
permitted.
Either AC line voltage from the same phase
must be applied to all four outputs of the fixed
dual end switches, or UL-Class 2 voltage must
be applied to all four outputs.
Siemens Industry, Inc.
Page 3 of 5
Document No. 129-402
Installation Instructions
October 2, 2009
Wiring, Continued
Notice top position
of clip before
attempting to
couple with
sensor.
Electronic
Fusible Link
(EFL)
Molex connector
for use with
Siemens EFL.
Figure 9. GND EFL Models Come Pre-wired for Assembly.
NOTE:
The GND models pre-wired for assembly with the EFL (GNDxxx.1U/F) will only operate when an EFL,
(ASK79.xxx) is attached.
Maintenance
CAUTION:
The GND actuator does not require any periodic cycling to function properly as an integral part of an
active smoke control damper system. The National Fire Alarm Code NFPA 72 states that all life
safety systems are to be functionally checked at least annually. Check the smoke control
damper/actuator every time you functionally check your smoke detectors, emergency lights, and/or
power generators for operation.
Electronic Fusible Link (EFL)
Versions GNDxxx.1U/F contain wire with a Molex connector (See Figure 9) to accommodate an EFL.
EFLs are purchased separately. See Table 1.
Table 1. Electronic Fusible Link Product Numbers.
Part Number
ASK79.165
ASK79.212
ASK79.250
ASK79.350
Page 4 of 5
Operation
165°F (74°C)
212°F (100°C)
250°F (121°C)
350°F (177°C)
Siemens Industry, Inc.
Document No. 129-402
Installation Instructions
October 2, 2009
Dimensions
Figure 10. Dimensions of GND OpenAir Actuator in Inches (mm).
References
Technical Instructions
OpenAir Electric Damper Actuator Designed
for UL Listed Fire/Smoke and Smoke Control
Dampers
155-746
Information in this publication is based on current specifications. The company reserves the right to make changes in specifications and
models as design improvements are introduced. OpenAir is a registered trademark of Siemens Industry, Inc. Product or company names
mentioned herein may be the trademarks of their respective owners. © 2009 Siemens Industry, Inc.
Siemens Industry, Inc.
Building Technologies Division
1000 Deerfield Parkway
Buffalo Grove, IL 60089
+ 1 847-215-1000
Your feedback is important to us. If you have
comments about this document, please send them
to sbt_technical.editor@siemens.com
Document No. 129-402
Printing in the USA
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