Bosch FAS-420-TT Series Operation Manual page 55

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