Bosch FAS-420-TT2 - Page 46

46 en | Planning Aspiration smoke detector LSN improved
2020.04 | 6.1 | F.01U.029.275 Operation guide Bosch Sicherheitssysteme GmbH
Double U-pipe system for space protection
1 pipe system
FAS-420-TP1
FAS-420-TT1
2 pipe systems
FAS-420-TP2
FAS-420-TT2
FAS / FCS
FAS / FCS
F
F
B
B
A
A
Double U-pipe system for space protection
Double U-pipe
system
Air sampling opening Number of air sampling openings
4 8 12 16 20 24
∅ air sampling
opening in mm
a
A 4.0 3.0 2.5 2.0 2.0 2.0
B - 3.4 3.0 2.5 2.0 2.0
C - - 3.0 3.0 2.5 2.0
D - - - 3.2 2.5 2.5
E - - - - 3.6 2.5
F - - - - - 3.6
a
Punch diameter of the aspiration reducing film sheet
Quadruple U-pipe system for space protection
1 pipe system
FAS-420-TP1
FAS-420-TT1
A B C D
FAS / FCS
Quadruple U-pipe system for space protection