Fire dampers
General information
06/2015 – DE/en
FK-EU
1
Functional description
Air transfer dampers are designed to shut off
openings for air transfer in fire resistant internal
walls and ceiling slabs. To prevent smoke from
spreading in buildings, it is extremely important
that the smoke is detected at an early stage.
Duct smoke detector Type RM-O-3-D is required
to control and trigger the air transfer damper.
The smoke detector operates on the principle
of light scattering and detects the smoke
regardless of its temperature so that the fire
dampers can be closed before the release
temperature is reached. The thermoelectric
release mechanism of the spring return actuator
also triggers the closure of the damper blade.
When the release temperature (72 °C) is reached,
the temperature sensor in the airflow interrupts
the supply voltage to the spring return actuator.
The spring return in the actuator causes the fire
damper to close (power off to close).
A second temperature sensor monitors
the ambient temperature. If the supply voltage
fails, the damper closes. Air transfer dampers
consist of an FK-EU fire damper, an RM-O-3-D
duct smoke detector with general building
inspectorate licence Z-78.6-125,
a spring return actuator (24 V AC/DC or 230 V AC)
with two integral limit switches,
and cover grilles on both ends.
Special characteristics
– Easy electrical connection
– Integration into the central BMS
with
TROXNETCOM
– General building inspectorate licence:
Z-6.50-
2031
For further and up-to-date information,
including the general building inspectorate licence
and the operating and installation manual,
please refer to our website. For a more detailed
selection and design of our fire dampers
please refer to the Easy Product Finder
design programme on our website.
K 4 – 1.1 – 9
Function
Air transfer damper
Schematic illustration of FK-EU as air transfer damper
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①
Casing
②
Damper blade
③
Travel stop for OPEN position
④
Travel stop for CLOSED position
⑤
Duct smoke detector RM-O-3-D
⑥
Temperature sensor
⑦
Thermoelectric release mechanism
⑧
Spring return actuator BLF/BF
⑨
Extension piece
⑩
Cover grille
⑪
Inspection access
