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Aspirating Smoke Detector
Double U-pipe
Max. distance FCS-320 – last T-fitting
Max. branch length
–
–
Max. overall pipe length per pipe system (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
M-pipe
Air sampling opening
Ø air sampling
A
opening in mm
a
B
C
D
a
Punch diameter of the aspiration reducing film sheet
M-pipe system activation thresholds per pipe system
Activation
Number of openings
thresholds
1 obstructed opening
2 obstructed openings
3 obstructed openings
4 obstructed openings
5 obstructed openings
6 obstructed openings
7 obstructed openings
... will be recognized by the setting level x
— not possible, 0 not practical
Example
If 3 of a total of 9 air sampling openings are found to be obstructed, the switch for setting the
airflow monitoring should be set to level I.
Notice!
When planning in accordance with EN 54‑20 or ISO 7240-20 , level I or II must always be set
for airflow monitoring.
Bosch Sicherheitssysteme GmbH
With low fan voltage
With high fan voltage
With low fan voltage
With high fan voltage
Number of air sampling openings
3
6
4.4
3.4
-
3.6
-
-
-
-
3
6
III
I
0
II
0
III
0
0
0
0
0
0
0
0
Operation Guide
Planning | en
20 m
30 m
40 m
110 m
140 m
4 m
12 m
12
9
12
3.0
2.5
3.0
2.5
3.2
3.2
-
3.2
9
12
—
—
—
—
I
—
II
I
0
II
0
III
0
0
2018.04 | 2.0 | F.01U.130.926
53
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