Bosch FAS-420-TT Series - Page 55

Aspiration smoke detector LSN improved Planning | en 55
Bosch Sicherheitssysteme GmbH Operation guide 2020.04 | 6.1 | F.01U.029.275
M-pipe system - simplified planning
1 pipe system
FAS-420-TP1
FAS-420-TT1
2 pipe systems
FAS-420-TP2
FAS-420-TT2
d
d
A
B C D
A
B C D
FAS / FCS
FAS / FCS
M-pipe system, e.g. for space protection
Limiting values Min. distance FAS-420 – last T-fitting 2m
Double U-pipe Max. distance FAS-420 – last T-fitting 20m
Max. branch length 20m
Max. overall pipe length (Ø 25mm) 80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
M-pipe Number of air sampling openings
3 6 9 12 15 18
Ø of all air sampling openings in mm
a
5.0 3.6 3.0 3.0 2.5 2.5
a
Punch diameter of the aspiration reducing film sheet