Bosch FAS-420-TT Series - Regulations

32 en | Planning Aspiration smoke detector LSN improved
2020.04 | 6.1 | F.01U.029.275 Operation guide Bosch Sicherheitssysteme GmbH
– Defining the response sensitivity, page 37
– Planning limits, page 38 .
The following sections describe plans with standard requirements for airflow monitoring:
– Standard pipe planning, page 39
– Planning for long pipe feed lines, page 56
– Simplified pipe planning, page 53
The pipe plan for more sensitive airflow monitoring is described in
– Pipe planning for single-hole monitoring, page 47 .
The plan for monitoring air-conditioning ducts is described in
– Planning for forced airflow, page 67 .
The principles for measuring power supply and pipe length are contained in
– Power supply, page 74 .
4.1 Regulations
The planning regulation below is based on the system limits of the FAS-420 series. Here, the
corresponding national regulations of the countries in their respectively applicable version
must be adhered to and planning must be adjusted to these.
The planning for the aspirating smoke detector in accordance with EN 54‑20 or ISO 7240-20 is
described below. The basic conditions are specified in Regulations. Planning must be carried
out in accordance with Standard Pipe Planning. In addition to Standard Pipe Planning, special
applications are also bound by the restrictions of the planning notes in accordance with
Planning with Single-hole Monitoring and the following sections. These must be taken into
account from the start in the case of any special planning processes.
Planning options in accordance with EN 54‑20 or ISO 7240‑20:
Various technical solutions are available to suit different planning criteria. The following table
lists the chapters in which the solutions are described.
Planning criteria Technical solution Principles Restriction
Area monitoring in
general
Basic planning Section
Standard pipe
planning, page
39
Detection of failure of a
single opening
Single-hole monitoring
planning
Section
Standard pipe
planning, page
39
Section Pipe
planning for
single-hole
monitoring, page
47
Equipment protection/
cabinet monitoring
Simplified pipe planning Section
Standard pipe
planning, page
39
Section
Simplified pipe
planning, page
53
Long supply lines Planning with long supply
lines
Section
Standard pipe
planning, page
39
Section Planning
for long pipe feed
lines, page 56