Aspirating Smoke Detector Planning | en 59
Bosch Sicherheitssysteme GmbH Operation Guide 2018.04 | 2.0 | F.01U.130.926
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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:
– Pipes with a40mm diameter increase transport time.
– 1m pipe with a40mm diameter replaces 3m pipe with a25mm diameter.
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∅ 40 mm: ≤ 100 m
∅ 25 mm:
≤ 20 m
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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
– Standard Pipe Planning, page 39
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:
Method of resolution Primarily used in
1 Increasing the sensitivity of the detector
module
Previously installed systems
2 Reducing the number of air sampling
openings
Systems currently being planned
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