Bosch FAS-420-TM Operation Manual page 40

40 en | Planning
Procedure
In the following example, a plan without air filter with 4 openings, not fitted with any other
accessories, should satisfy class B. The red shaded areas show the potential plans with
different pipe shapes and fan voltage.
General
1. Selection:
Select the planning table with or without air filter, as
applicable.
Result:
Planning table and specified air filter
2. Selection:
Select the number of air sampling openings from the
planning table. Note the possible sensitivity classes.
Result:
Specified detector module with specified setting
and alarm threshold
3. Selection:
Select the sensitivity (sensitivity class) of the system
according to the gradation described in
Section 3.4 Defining the Response Sensitivity.
Result:
Specified sensitivity class in accordance with EN
54-20
4. Selection:
Select other pipe components, such as a water
separator.
Result:
Specified planning table
5. Selection:
Select the possible pipe length for the relevant pipe
shape and fan voltage.
Result:
Specified planning in accordance with EN 54-20 for
the previously specified parameters
You will find the planning tables in question in *** 'Planning without air filter' on page 97 ***
and *** 'Planning with Air Filter' on page 98 ***.
Abbreviation
S
MA
PA
l [m]
F.01U.088.878 | 4.1 | 2010.11
Example
Select the planning table without air filter, ***
'Planning with Air Filter' on page 41 ***
In the *** 'Planning with Air Filter' on page 41 ***
table, select the column with four air sampling
openings (Number of air sampling openings, 4)
In the *** 'Planning with Air Filter' on page 41 ***
table, select the response sensitivity you require
(class A, B or C) from the column highlighted in red.
You must select the class that corresponds to the
configured sensitivity.
Select the *** 'Without any other pipe accessories' on
page 41 *** table.
In the *** 'Without any other pipe accessories' on page
41 *** table, select the pipe shape and fan voltage you
require, and note the permissible total pipe length.
Meaning
Sensitivity (% LT/m)
Main alarm
Pre-alarm
Permissible total pipe length in meters
Operation Guide
FAS-420-TM Aspirating Smoke Detector
Bosch Sicherheitssysteme GmbH