Bosch FAS-420-TT Series - Pipe Planning for Single-Hole Monitoring

Aspiration smoke detector LSN improved Planning | en 47
Bosch Sicherheitssysteme GmbH Operation guide 2020.04 | 6.1 | F.01U.029.275
Quadruple U-pipe
system
Air sampling opening Number of air sampling openings
8 16 24 32
∅ air sampling
opening in mm
a
A 3.20 2.5 2.0 2.0
B - 3.0 2.5 2.0
C - - 3.0 2.0
D - - - 2.5
a
Punch diameter of the aspiration reducing film sheet
4.7 Pipe planning for single-hole monitoring
Depending on the pipe configuration, the following system parameters are used to detect a
single air sampling opening or a particular number of obstructed air sampling openings.
Planning is to be carried out according to regulations specified in Standard Pipe Planning.
Additionally, the following limiting values and opening diameters must be observed. An
additional accessory (air filter, condensate separator etc.) can have an effect on the maximum
pipe length.
I-pipe system - single-hole monitoring
1 pipe system FAS-420-
TP1 FAS-420-TT1
2 pipe systems FAS-420-
TP2 FAS-420-TT2
FAS / FCS
A
B
C D E I JF
A
B
C D E I JF
I-pipe system for space protection
Limiting values Min. distance FAS-420– 1st air sampling opening 4m
I-pipe system Max. distance FAS-420 – 1st air sampling opening 20m
Max. distance: 1st air sampling opening – last air sampling opening
– With low fan voltage
– With high fan voltage
40m
60m
Max. overall pipe length (Ø 25mm)
– With low fan voltage
– With high fan voltage
60m
80m
Min. distance between 2 air sampling openings 4m
Max. distance between 2 air sampling openings 12m
Max. number of air sampling openings (n) per pipe system 10
I-pipe system Air sampling
opening
Number of air sampling openings
2 3 4 5 6 7 8 9 10
∅ air sampling
opening in mm
a
A 6.0 5.0 4.2 3.8 3.2 3.0 2.5 2.5 2.0
B 6.8 5.2 4.4 3.8 3.2 3.0 2.5 2.5 2.0
C - 5.2 4.6 4.0 3.6 3.0 3.0 2.5 2.5
D - - 4.6 4.0 3.6 3.4 3.0 3.0 2.5