User Manual 5.1-1 (2018-09) 7
Subject to change
Series FK92K
Size-independent excess lengths
T U
Thermal-mechanical release mechanism
95 -
Actuators M220-10/H, M24-10/H
75 140
Actuators M220-9/H, M24-9/H
90 120
All dimensions in mm
Operating
range, closing and opening
•
FK90K fire dampers are suitable for volume flows up to 7000 m³/h, inflow velocities of up to 12 m/s and operating
pressures of up to 1500 Pa.
•
The application boundaries marked in the nomograms must be complied with.
⇒
see pages 8 to 11
•
FK90K fire dampers are quick-closing, apart from the versions with electric actuators. Due to the flow dynamics,
if the fire damper is triggered at high inflow velocities, this may cause pressure surges accompanied by
multiplication of operating pressures, which in turn may lead to considerable damage to the ventilation and air
conditioning system. Additionally, when shut-off dampers are closed, the volume flows are distributed among other
parallel dampers that are still open. This may lead to excessive stress, in particular at high operating pressures,
large volume flows and large cross-sections. Electric actuators should be used under such conditions. These
actuators close the fire dampers relatively slowly and in addition, deactivation of the fan can be triggered via the
OPEN limit switch.
•
The torques of the electric actuators are sufficient for all fire damper sizes, which means they can be fully opened
when the fan is in operation.
•
Whenever possible, it must be ensured that the inflows and outflows at the fire dampers are the same.
•
FK90K fire dampers with electric actuator can be used for OPEN/CLOSED volume flow control.
Maximum excess lengths
of mechanical and electrical equipment
parts.
Additional space must be
provided for installation,
electrical connections and
maintenance; observe the
cable entry points.
Damper blade:
It is situated
inside the fire damper casing
even in the open position.
Thus no excess length!
To allow access to the release
mechanisms and actuators
for operational reasons, a
clearance, in addition to "T",
from adjacent walls, ceilings or
other fire dampers of 400 mm
is recommended.
B
B + 20
20
Outer dimension B + 63
40
02
H
02
+
H
34
+
H
Outer dimension
02
40
110
260
10
14
5
02
2
T
U
FK90K fire dampers
Data sheet (2)
Seal
Sliding rail or
sliding clip
Ventilation duct with
flange for sliding rail
Seal
Sliding rail or
sliding clip
Ventilation duct with
flange for sliding rail
Hexagon screw M6
FK90K
Ventilation duct with flange
Seal
Ventilation duct connections
•
with screws
•
with sliding rails
•
with screw terminals
Thermal-mechanical release mechanisms
are
marked with
V3 or V5
.
The height-
dependent allocations must not be
changed!
H
< 175 V5
≥ 175 V3
