Bosch FAS‑420‑TP Series - Page 54

54 en | Planning Aspiration smoke detector LSN improved
2020.04 | 6.1 | F.01U.029.275 Operation guide Bosch Sicherheitssysteme GmbH
I-pipe system Number of air sampling openings
2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
Ø of all air sampling openings
in mm
a
6.0 5.0 4.4 4.0 3.6 3.4 3.2 3.0 3.0 3.0 3.0 2.5 2.5 2.5 2.5 2.5 2.5
a
Punch diameter of the aspiration reducing film sheet
U-pipe system - simplified planning
1 pipe system
FAS-420-TP1
FAS-420-TT1
2 pipe systems
FAS-420-TP2
FAS-420-TT2
FAS / FCS
FAS / FCS
d
d
i
12
1
2
3
4
5
6
7
8
9
10
1
2
3
4
5
6
7
8
9
10
i
1
2
3
4
5
6
7
8
9
10
U-pipe system, e.g. for equipment protection
Limiting values Min. distance FAS-420 – T-fitting 2m
U-pipe system Max. distance FAS-420 – T-fitting 20m
Max. branch length 20m
Max. overall pipe length (Ø 25mm) 60m
Min. distance between air sampling openings (d) 0.1m
Max. distance between air sampling openings (d) 4m
Max. number of air sampling openings (n) per pipe system 18
U-pipe system Number of air sampling openings
2 4 6 8 10 12 14 16 18
Ø of all air sampling openings in
mm
a
6.0 4.4 3.6 3.2 3.0 3.0 2.5 2.5 2.5
a
Punch diameter of the aspiration reducing film sheet