Bosch FAS-420-TT2 - Simplified Pipe Planning

Aspiration smoke detector LSN improved Planning | en 53
Bosch Sicherheitssysteme GmbH Operation guide 2020.04 | 6.1 | F.01U.029.275
4 obstructed openings 0 III II
5 obstructed openings 0 0 III
6 obstructed openings 0 0 III
… will be recognized by the setting level x
— not possible, 0 not practical
Example
If 4 of a total of 12air sampling openings are found to be blocked, the switch for setting the
airflow monitoring should be set to level II.
Notice!
When planning in accordance with EN 54‑20 or ISO 7240-20, level I or II must always be set
for airflow monitoring.
4.8 Simplified pipe planning
Simplified planning is used for equipment protection and in premises with smaller
dimensions. The benefit of this type of planning is the standard diameters of the suction
openings.
Planning is to be carried out according to regulations specified in Standard Pipe Planning.
Additionally, the following limiting values and opening diameters must be observed. An
additional accessory (air filter, condensate separator etc.) can have an effect on the maximum
pipe length.
I-pipe system - simplified planning
1 pipe system
FAS-420-TP1
FAS-420-TT1
2 pipe systems
FAS-420-TP2
FAS-420-TT2
FAS / FCS
FAS / FCS
d
d
i 1
2
3
4
5
6
7
8
9
10
i
12
1
2
3
4
5
6
7
8
9
10
1
2
3
4
5
6
7
8
9
10
I-pipe system, e.g. for equipment protection
Limiting values Min. distance FAS-420 – 1st air sampling opening 2m
I-pipe system Max. distance FAS-420 – 1st air sampling opening 20m
Max. distance: 1st air sampling opening – last air sampling opening 20m
Max. overall pipe length (Ø 25mm) 40m
Min. distance between air sampling openings 0.1m
Max. distance between air sampling openings 4m
Max. number of air sampling openings (n) per pipe system 18