M-Pipe System - Bosch FAS-420-TM Operation Manual

46 en | Planning
a
Punch diameter of the aspiration reducing film sheet
U-pipe system activation thresholds
U-pipe system
Activation threshold
per pipe system
0 not practical
- not possible
Example:
If 3 of a total of 8 air sampling openings are found to be obstructed, airflow monitoring must
be set to ± 25% using the FAS-ASD-DIAG Diagnostic Software.
NOTICE!
When planning in accordance with EN 54-20, airflow monitoring must always be set to 20%.
3.7.3

M-pipe system

1 pipe system
FAS-420-TM
FAS-420-TM-R
FAS-420-TM-RVB
F.01U.088.878 | 4.1 | 2010.11
U-pipe system
Ø of air sampling
a
openings in mm
Number of obstructed
air sampling openings
1 obstructed opening
2 obstructed openings
3 obstructed openings
4 obstructed openings
5 obstructed openings
6 obstructed openings
7 obstructed openings
Figure 3.9 M-pipe system for space protection
Air sampling
opening
2
A 6.0
B -
C -
D -
FAS / FCS
Operation Guide
FAS-420-TM Aspirating Smoke Detector
Number of air sampling openings
4 6
4.2 3.4
4.4 3.6
- 3.6
- -
Number of air sampling openings
2 4
± 25% ± 15%
0 ± 25% ± 20%
0 0 ± 30%
0 0
0 0
0 0
0 0
A
B
Bosch Sicherheitssysteme GmbH
8
3.0
3.0
3.2
3.2
6 8
- -
± 15%
± 25%
0 ± 35%
0 0
0 0
0 0