Siemens OpenAir ASK791.165, OpenAir ASK791.212, OpenAir ASK791.250, OpenAir ASK791.350 Installation Instructions Manual

Installation Instructions

OpenAir™ Electronic Fusible Link

Used with Siemens Fire and Smoke

WARNING:

CAUTION:

Damper Actuators

Docume nt No. A6V1 1200850

May 1, 2018

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 EF L
model ordered and i nstalled, 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 carri ed by the specif ic damper and
actuator is assigned as an assembly and
cannot be added in the field.

Replacement EFLs may be field-installed wit h l ocal
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)

Requir ed 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, t he power to the electronic damper
actuator is shut off and the spring mechanism closes the
damper.

NOTE: Depending on the application envi ronment, 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 cool ed
below the EFL setpoi nt. The EFL device will again be
operational .

NOTE: The EFL is compati ble only with OpenAir GJD,

GRD, GKD, or GVD fire and smoke damper

actuators.

Warning/Caution Notations

Personal injury or l oss of life may
occur if you do not follow the
procedu res as specified.
Equipm ent damage m ay oc cur if
you do not follow the procedures
as specified.

Item number A6V11200850, Rev. DA Page 1 of 4

Figure 1. Parts Description.

Document No. A6V1120085 0

CAUTION:

Installation Instructions
May 1, 2018

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

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 t he EF L.

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.

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.

Page 2 of 4 Siemens Industry, Inc.