FAS-420-TM Aspirating Smoke Detector
Planning | en
47
Bosch Sicherheitssysteme GmbH
Operation Guide
F.01U.088.878 | 4.1 | 2010.11
M-pipe system activation thresholds
Example:
If 1 of a total of 6 air sampling openings is found to be obstructed, airflow monitoring must be
set to ± 15% using the FAS-ASD-DIAG Diagnostic Software.
Min. distance FAS-420-TM – 1st air sampling opening
2 m
Max. distance FAS-420-TM – 1st air sampling opening
20 m
Max. branch length
16.5 m
Max. total pipe length per pipe system
–
Pipe Ø 25 mm
50 m
–
Additional pipe Ø 12 mm
8 x 3 m
Max. total pipe length per pipe system for a fan voltage < 10.5 V
–
Pipe Ø 25 mm
40 m
–
Additional pipe Ø 12 mm
8 x 3 m
Min. distance between 2 air sampling openings (d)
4 m
Max. distance between 2 air sampling openings (d)
10 m
Max. number of air sampling openings (n) per pipe system
6 units
M-pipe system
Air sampling
opening
Number of air sampling openings
3
6
Ø of air sampling
openings in mm
a
A
5.0
3.6
B
-
3.8
a
Punch diameter of the aspiration reducing film sheet
M-pipe system
Number of obstructed air
sampling openings
Number of air sampling openings
3
6
Activation threshold
per pipe system
1 obstructed opening
± 30%
± 15%
2 obstructed openings
0
± 30%
3 obstructed openings
0
0
4 obstructed openings
0
0
5 obstructed openings
0
0
6 obstructed openings
0
0
0 not practical
- not possible
NOTICE!
When planning in accordance with EN 54-20, airflow monitoring must always be set to 20%.
Summary of Contents for FAS-420-TM
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