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Aspirating Smoke Detector
F
Example of a pipe system with long pipe feed lines for area monitoring
The general pipe planning is restricted by the use of long pipe feed lines as follows:
–
–
FAS / FCS
Example of special planning for high-rise warehouse
A basic pipe can be installed for high-rise warehouse planning, from which the stub-shaped
aspiration pipes are routed.
See also
–
4.10
Planning with Acceleration Openings
Acceleration openings
In order to meet individual regulations, it may be necessary to increase the transport time of
the systems. This can be fulfilled by fitting the ends of the pipe branches with acceleration
openings, which increase transport speed. Depending on the regulations concerning transport
time, it may be necessary to dimension an acceleration opening with the same or double the
diameter of the last air sampling opening on a pipe branch. Only authorized aids should be
used to calculate the transport time.The additional airflow of the acceleration openings also
reduces the sensitivity of the air sampling openings. If required, this reduction can be offset as
follows:
1
2
Bosch Sicherheitssysteme GmbH
E
D
C
B
A
Pipes with a 40 mm diameter increase transport time.
1 m pipe with a 40 mm diameter replaces 3 m pipe with a 25 mm diameter.
C
B
A
∅ 40 mm: ≤ 100 m
Standard Pipe Planning, page 39
Method of resolution
Increasing the sensitivity of the detector
module
Reducing the number of air sampling
openings
A
B
C
D
B
2
1
9
1 0
1 0
9
8
7
8
7
5
6
6
5
3
4
4
3
2
i
2
1
1
Primarily used in
Previously installed systems
Systems currently being planned
Operation Guide
Planning | en
E
F
∅ 25 mm:
≤ 20 m
2018.04 | 2.0 | F.01U.130.926
59
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