Technical data

Automatic Fire Detectors LSN improved
version
Planning | en 9
Bosch Sicherheitssysteme GmbH Product Information F.01U.003.449 | 7.2 | 2010.05
3 Planning
3.1 Basic Installation/Configuration Notes
– Multi-sensor fire detectors must be planned in line with the guidelines for optical
detectors until a guideline for their planning is developed in collaboration with the VdS
(see also DIN VDE 0833 Part 2 and VDS 2095):
– Maximum monitoring area 120 m
2.
– Maximum installation height 16 m.
– If occasional switch-off of the optical sensor is required, the planning must occur
according to the guidelines for heat detectors (see DIN VDE 0833 Part 2 and VDS 2095):
– Maximum monitoring area 40 m
2.
– Maximum installation height 7.5 m.
– Maximum permissible air speed: 20 m/s.
– FAH-T 420 detectors must be configured according to Class A1R when planning fire
barriers conforming to DIBt.
3.2 Use in a Local Security Network (LSN/LSN improved version)
In a Local Security Network, the detectors connected to a fire panel can be operated in the
following operating modes:
3.3 Use in Areas with Elevated Radioactivity
There are two detector types available especially for use in areas with elevated radioactivity,
such as in nuclear power plants:
– FAP-O 420-KKW
– FAH-T 420-KKW
NOTICE!
FAP-420/FAH-420 Automatic Fire Detectors are not designed for exterior use.
Detector Type Operating mode
Combined Optical Thermal
maximum
Thermal
differential
FAP-OTC420XXXX
FAP-OT 420 X X X X
FAP-O 420/
FAP-O 420 KKW
-X- -
FAH-T 420/
FAH-T 420 KKW
--XX
FAP-DO420 - X - -
FAP-DOT420 X X X X
FAP-DOTC420 X X X X
NOTICE!
Planning should take the anticipated total current and line resistance into account to ensure
each detector has an operating voltage of at least 15 V DC.