52
en | Planning
FCS-320-TM Aspirating Smoke Detector
F.01U.130.928 | 1.0 | 2009.11
Operation Guide
Bosch Sicherheitssysteme GmbH
The open end of the air-return pipe is sloped at an angle of 45° (see
Figure 5.5
,
Page 71
).
The distance of the air sampling openings to one another and to the duct wall is represented
in the following table.
Diameter of the air sampling openings
The diameter of the air sampling openings is derived from the number of air sampling
openings. The precise value can be obtained from
Section 3.8 Simplified Pipe Planning
.
The pipe is closed with an end cap without bore hole.
Arrangement
The air sampling openings must face the airflow.
Note when planning that the air-conditioning ducts are often only accessible from two sides
for installation of the pipe system.
Example
Figure 3.19
shows two planning examples of pipe systems in air-conditioning ducts.
Figure 3.18
Air-return Pipe
guidew
ay
Front view
A
Plan view
1
air-conditioning duct
2
Duct adapter
3
Airflow
4
Aspiration
5
Air-return Pipe
b
Width of air-conditioning
duct
v
1
- v
4
Flow speed
1
1
5
2
2
i
1
2
34
5
6
78
9
10
4
3
3
F
v
1
v
2
v
3
v
4
A
FAS / FCS
FAS / FCS
5
1/2 b
b
2
FA
S
-4
20
-T
M
se
rie
s
A
B
Bore distances
Duct cross-section
≤
0.5 m²
Duct cross-section
≤
0.5 m²
Distance of the air sampling openings to the
wall
100 to 200mm
200 to 300 mm
Distance of the air sampling openings to one
another
100 mm
150 mm
Summary of Contents for FCS-320-TM
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