Bosch FAS-420, Operation Manuals

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38 en | Planning Aspirating Smoke Detector
2018.04 | 2.0 | F.01U.130.926 Operation Guide Bosch Sicherheitssysteme GmbH
Class Description Application example
A Aspirating smoke detector with
extremely high sensitivity Very early detection: significant smoke
dilution through air conditioning in IT
areas
B Aspirating smoke detector with
increased sensitivity Early detection: significant time gains
thanks to very early fire detection
(without air condition)
C Smoke aspiration system with normal
sensitivity Normal detection: fire detection with the
advantages of smoke aspiration systems
Notice!
Depending on the number of air sampling openings, fire sensitivity classes A, B and C can all
be achieved with the detection modules available.
The table shows the sensitivities you can choose from
Response sensitivity (main alarm)
DM-TP-50(80) Detector
Module DM-TP-10(25) Detector
Module DM-TP-01(05) Detector Module
Not permissible 0.8%/m (2%/m) light
obscuration 0.12%/m (0.4%/m) light
obscuration
Not permissible 0.4%/m (1%/m) light
obscuration (standard) 0.06%/m (0.2%/m) light
obscuration (standard)
1.0%/m (1.6%/m) light
obscuration 0.2%/m (0.5%/m) light
obscuration 0.03%/m (0.1%/m) light
obscuration
0.5%/m (0.8%/m) light
obscuration (standard) 0.1%/m (0.25%/m) light
obscuration 0.015%/m (0.05%/m) light
obscuration
Notice!
The sensitivity value is based on measurements with standard test fires (old value in
brackets).
4.5 Planning Limits
The following limit values must always be observed for the FCS-320 series:
Limiting values Maximum number of air sampling openings per detector
module 32
Maximum total pipe length 300 m (2 x
280 m)
Minimum pipe length between 2 air sampling openings 4 m
Minimum pipe length between 2 air sampling openings 12 m
The maximum monitoring area of an air sampling opening corresponds to the monitoring area
of point-type detectors in accordance with the applicable planning guidelines.