Aspirating Smoke Detector
Planning | en
53
Bosch Sicherheitssysteme GmbH
Operation Guide
2018.04 | 2.0 | F.01U.130.926
Double U-pipe
Max. distance FCS-320 – last T-fitting
20
m
Max. branch length
–
With low fan voltage
–
With high fan voltage
30
m
40
m
Max. overall pipe length per pipe system (Ø 25
mm)
–
With low fan voltage
–
With high fan voltage
110
m
140
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
12
M-pipe
Air sampling opening
Number of air sampling openings
3
6
9
12
Ø air sampling
opening in mm
a
A
4.4
3.4
3.0
2.5
B
-
3.6
3.0
2.5
C
-
-
3.2
3.2
D
-
-
-
3.2
a
Punch diameter of the aspiration reducing film sheet
M-pipe system activation thresholds per pipe system
Activation
thresholds
Number of openings
3
6
9
12
1 obstructed opening
III
I
—
—
2 obstructed openings
0
II
—
—
3 obstructed openings
0
III
I
—
4 obstructed openings
0
0
II
I
5 obstructed openings
0
0
0
II
6 obstructed openings
0
0
0
III
7 obstructed openings
0
0
0
0
… 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.
Содержание FAS-420
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