Siemens OpenAir ASK791.165 User manual

Installation Instructions
Document No. A6V11200850
May 1, 2018
OpenAir™ Electronic Fusible Link
Used with Siemens Fire and Smoke
Damper Actuators
Item number A6V11200850, Rev. DA Page 1 of 4
Product Description
The Electronic Fusible Link (EFL) is a heat responsive
device used with the Siemens OpenAir™ UL listed fire
and smoke control damper actuator.
Upon approaching the temperature rating of the EFL
model ordered and installed, the EFL cuts power to the
electronic damper actuator and the actuator’s spring
return mechanism closes the damper.
NOTE: The EFL must be factory-installed. The UL
rating carried by the specific damper and
actuator is assigned as an assembly and
cannot be added in the field.
Replacement EFLs may be field-installed with local
authority approval.
Contents
•Electronic Fusible Link
•Two 1.5-inch (38.1 mm) No. 8 pan head self-drilling
screws
Product Numbers
ASK791.165 165°F (74°C)
ASK791.212 212°F (100°C)
ASK791.250 250°F (121°C)
ASK791.350 350°F (177°C)
NOTE: The EFL is compatible only with OpenAir GJD,
GRD, GKD, or GVD fire and smoke damper
actuators.
Warning/Caution Notations
WARNING:
Personal injury or loss of life may
occur if you do not follow the
procedures as specified.
CAUTION:
Equipment damage may occur if
you do not follow the procedures
as specified.
Required Tools
•1-3/8-inch (35 mm) drill or hole punch
•No. 2 Phillips bit
Expected Installation Time
15 minutes
Prerequisites
Appropriate OpenAir GJD, GRD, GKD, or GVD series
damper actuator.
Operation
When the EFL detects that its temperature rating is
being approached, the power to the electronic damper
actuator is shut off and the spring mechanism closes the
damper.
NOTE: Depending on the application environment, the
EFL may trip before the listed temperature
rating.
The manual override reset button (see Figure 1) on the
EFL can be pressed when the temperature has cooled
below the EFL setpoint. The EFL device will again be
operational.
Figure 1. Parts Description.

Document No. A6V11200850
Installation Instructions
May 1, 2018
Page 2 of 4 Siemens Industry, Inc.
Operation, Continued
CAUTION:
Before resetting any sensor, carefully
inspect the damper, damper actuator, and
sensor. Verify whether or not local
authorities or building managers must be
contacted.
Damage to the temperature sensor will
result in loss of damper control.
WARNING:
Before attempting to reset the EFL by
pressing the Override/reset button, take
the precaution to protect exposed skin as
the EFL will be extremely hot to the touch.
Installation
Figure 2. The EFL and OpenAir Fire and Smoke Damper
Actuator.
WARNING:
The internal/external mounting orientation
or position in the duct will affect the time
and/or temperature the EFL requires to
switch.
NOTE: Notice the position of the top clip before
attempting to couple the actuator with the EFL
sensor.
Figure 3. Proper Clip Positioning.
Internal Mounting
For internal mounting, the reset button must protrude
through a 3/8-inch (9.5 mm) diameter relief hole
providing operator access for resetting the EFL.
CAUTION:
Failure to provide a relief hole will keep
the reset button pressed against the duct
wall or damper sleeve, and the EFL will
fail to operate as intended.

Document No. A6V11200850
Installation Instructions
May 1, 2018
Siemens Industry, Inc. Page 3 of 4
Internal Mounting, Continued
Figure 4. EFL Reset Button Relief Hole.
CAUTION:
Exceeding the specified mounting screw
torque may damage the housings.
External Mounting
For external mounting, make a 1-3/8-inch (35 mm)
diameter hole in the duct wall or damper sleeve. The
sensor will protrude into the duct or damper for proper
temperature sensing.
Figure 5. Providing Proper Sensor Temperature
Detection Access.
CAUTION:
Exceeding the specified mounting screw
torque may damage the housings.

Document No. A6V11200850
Installation Instructions
May 1, 2018
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 trademark of Siemens Schweiz, AG. Other product or company names mentioned herein may be the
trademarks of their respective owners. © 2018 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
[e-mail]
Document No. A6V11200850
Printed in the USA
Page 4of 4
Dimensions
Figure 6. Dimensions in Inches (mm).