4.4 FKR-EU with spring return actuator
and duct smoke detector
FKR-EU with spring return actuator can optionally also
be controlled by a duct smoke detector approved by the
building authorities, e.g. RM-O-3-D.
Fig. 8: FKR-EU with spring return actuator and duct
smoke detector in a rectangular duct
1.1
Casing
1.2
Damper blade with seal
1.4
Travel stop for CLOSED position
1.8
Lip seal
9.2
Rectangular duct, by others
10.1
Spring return actuator
10.12 Duct smoke detector RM-O-3-D
10.13 Thermoelectric release mechanism with temper-
ature sensor
Fig. 9: FKR-EU with spring return actuator and duct
smoke detector in a circular duct
1.1
Casing
1.2
Damper blade with seal
1.4
Travel stop for CLOSED position
1.8
Lip seal
9.15
T-piece or saddle connector, by others
10.1
Spring return actuator
10.12 Duct smoke detector RM-O-3-D
10.13 Thermoelectric release mechanism with temper-
ature sensor
Functional description
If the duct smoke detector detects smoke, the spring
return actuator closes the damper blade. This prevents
smoke from being transferred via ductwork into adjacent
fire compartments even before it reaches a temperature
that would trigger the thermoelectric release mecha-
nism.
As long as power is supplied to the actuator, the damper
blade remains open. The spring return actuator closes
the fire damper when one of the following events occur:
The duct smoke detector detects smoke
Temperature in the fire damper > 72 °C
Ambient temperature outside the release mecha-
nism > 72 °C
The power supply is interrupted (power off to close)
The duct smoke detector must be installed by others in
a rectangular duct. Alternatively, the installation can be
carried out on site in a circular duct, in a T-piece.
The duct smoke detector must always be placed at the
top. Deviating arrangements are possible, provided that
the specifications of the general building inspectorate
licence of the duct smoke detector are observed.
Parts and function
FKR-EU with spring return actuator and duct smok...
Fire damper FKR-EU
22
Содержание FKR-EU
Страница 162: ...Fire damper FKR EU 162 ...
Страница 163: ...Fire damper FKR EU 163 ...
Страница 164: ...Fire damper FKR EU 164 ...