Bosch FCS-320-TM, Operation Manual

Page: 43 / 100

FCS-320-TM Aspirating Smoke Detector Planning | en 43
Bosch Sicherheitssysteme GmbH Operation Guide F.01U.130.928 | 1.0 | 2009.11
I pipe system activation thresholds
Example:
If 2 of a total of 5 air sampling openings are found to be obstructed, airflow monitoring must
be set to ± 20% using the FAS-ASD-DIAG Diagnostic Software.
3.7.2 U-pipe system
I-pipe system Number of obstructed air
sampling openings
Number of air sampling openings
2 3 4 5
Activation threshold 1 obstructed opening ± 30% ± 20% ± 15% ± 10%
2 obstructed openings 0 0 ± 30% ± 20%
3 obstructed openings 0 0 0 0
4 obstructed openings 0 0 0 0
5 obstructed openings 0 0 0 0
0 not practical
NOTICE!
When planning in accordance with EN 54-20, airflow monitoring must always be set to 20%.
1 pipe system
FCS-320-TM
FCS-320-TM-R
Figure 3.8 U-pipe system for space protection
Min. distance FCS-320-TM – 1st air sampling opening 2 m
Max. distance FCS-320-TM – 1st air sampling opening 20 m
max. branch length 25 m
Max. total pipe length per pipe system
– Pipe Ø 25 mm 50 m
– Additional pipe Ø 12 mm 8 x 3 m
Max. total pipe length per pipe system for a fan voltage < 10.5 V
– Pipe Ø 25 mm 40 m
– Additional pipe Ø 12 mm 8 x 3 m
Min. distance between 2 air sampling openings (d) 4 m
Max. distance between 2 air sampling openings (d) 10 m
Max. number of air sampling openings (n) per pipe system 8 units
A B C D
FAS / FCS