Planning Limits - Bosch FAS-420-TT Series Operation Manual

38 en | Planning
Class
A
B
C
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-TT-50(80) Detector
Module
Not permissible
Not permissible
1.0%/m (1.6%/m) light
obscuration
0.5%/m (0.8%/m) light
obscuration (standard)
The planning of the monitoring area always occurs according to the national guidelines for
point-type smoke detectors.
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 FAS-420 series:
Limiting values
2020.04 | 6.1 | F.01U.029.275
Description
Aspirating smoke detector with
extremely high sensitivity
Aspirating smoke detector with
increased sensitivity
Smoke aspiration system with normal
sensitivity
DM-TT-10(25) Detector
Module
0.8%/m (2%/m) light
obscuration
0.4%/m (1%/m) light
obscuration (standard)
0.2%/m (0.5%/m) light
obscuration
0.1%/m (0.25%/m) light
obscuration
Maximum number of air sampling openings per detector
module
Maximum total pipe length
Minimum pipe length between 2 air sampling openings
Minimum pipe length between 2 air sampling openings
Operation guide
Aspiration smoke detector LSN improved
Application example
Very early detection: significant smoke
dilution through air conditioning in IT
areas
Early detection: significant time gains
thanks to very early fire detection
(without air condition)
Normal detection: fire detection with the
advantages of smoke aspiration systems
DM-TT-01(05) Detector Module
0.12%/m (0.4%/m) light
obscuration
0.06%/m (0.2%/m) light
obscuration (standard)
0.03%/m (0.1%/m) light
obscuration
0.015%/m (0.05%/m) light
obscuration
Bosch Sicherheitssysteme GmbH
32 (2 x 32)
300 m (2 x
280 m)
4 m
12 m