Pipe Planning For Single-Hole Monitoring - Bosch FAS-420-TT Series Operation Manual

Aspiration smoke detector LSN improved
Quadruple U-pipe
system
∅ air sampling
opening in mm
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
Limiting values Min. distance FAS-420– 1st air sampling opening
I-pipe system Max. distance FAS-420 – 1st air sampling opening
Max. distance: 1st air sampling opening – last air sampling opening
–
–
Max. overall pipe length (Ø 25 mm)
–
–
Min. distance between 2 air sampling openings
Max. distance between 2 air sampling openings
Max. number of air sampling openings (n) per pipe system
I-pipe system Air sampling
opening
∅ air sampling A
a
opening in mm
B
C
D
Bosch Sicherheitssysteme GmbH
Air sampling opening Number of air sampling openings
A
a
B
C
D
FAS / FCS
I-pipe system for space protection
With low fan voltage
With high fan voltage
With low fan voltage
With high fan voltage
Number of air sampling openings
2 3
6.0 5.0
6.8 5.2
- 5.2
- -
8
3.20
-
-
-
A C D
B
A C D
B
4 5 6
4.2 3.8 3.2
4.4 3.8 3.2
4.6 4.0 3.6
4.6 4.0 3.6
Operation guide
Planning | en
16 24
2.5 2.0
3.0 2.5
- 3.0
- -
E F I J
E F I J
7 8 9
3.0 2.5 2.5
3.0 2.5 2.5
3.0 3.0 2.5
3.4 3.0 3.0
2020.04 | 6.1 | F.01U.029.275
47
32
2.0
2.0
2.0
2.5
4 m
20 m
40 m
60 m
60 m
80 m
4 m
12 m
10
10
2.0
2.0
2.5
2.5