Standard Pipe Planning; Determining The Necessary Accessories; Pipe Planning With Pipe Accessories - Bosch FAS-420-TM Operation Manual

FAS-420-TM Aspirating Smoke Detector
3.6

Standard Pipe Planning

In order to plan in accordance with the EN 54-20 standard, certain factors must be known,
such as the system sensitivity requirements, the number of air sampling openings and the
accessories needed for the application concerned. These factors can be used to determine
the appropriate standard-compliant construction of the pipe system using the following
chapter and the planning table in the appendix.
3.6.1

Determining the Necessary Accessories

As accessory components, e.g. filters, have a particular effect on the dimensions of pipe
planning, the appropriate accessory must be selected for the application concerned in
advance. Retrofitting an accessory, e.g. a fine filter, is largely only possible if a certain reserve
is planned in advance.
The following components must be taken into account in this regard:
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See 2.8.3
3.6.2

Pipe Planning with Pipe Accessories

For the purpose of pipe system planning, the following planning table is available for all
selected pipe accessories.
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NOTICE!
In order to improve the detection quality of a smoke aspiration system, an area can be
monitored with more detection points than required by national guidelines. However, to
calculate the necessary sensitivity of an aspirating smoke detector, the number of aspiration
points required by the standard must be used.
Bosch Sicherheitssysteme GmbH
Air filter
Water separator
Three-way-tap
Planning without air filter
Planning with FAS-ASD-FL air filter
Operation Guide
Planning | en 39
F.01U.088.878 | 4.1 | 2010.11