44 en | Planning FAS-420-TM Aspirating Smoke Detector
F.01U.088.878 | 4.1 | 2010.11 Operation Guide Bosch Sicherheitssysteme GmbH
3.7 Planning with Single-hole Monitoring
Depending on the pipe configuration, the following system parameters are used to detect a
single air sampling opening or a particular number of obstructed air sampling
openings.Planning is to be carried out according to regulations specified in
Section 3.6 Standard Pipe Planning, page 39. 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.
3.7.1 I-pipe system
1 pipe system
FAS-420-TM
FAS-420-TM-R
FAS-420-TM-RVB
Figure 3.7 I-pipe system for space protection
Min. distance FAS-420-TM – 1st air sampling opening 2 m
Max. distance FAS-420-TM – 1st air sampling opening 20 m
Max. total pipe length per pipe system
– Pipe Ø25mm 40m
– Additional pipe Ø 12 mm 5 x 3 m
Max. total pipe length per pipe system for a fan voltage < 10.5 V
– Pipe Ø25mm 30m
– Additional pipe Ø 12 mm 5 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 5 units
I-pipe system Air sampling
opening
Number of air sampling openings
12345
Ø of air sampling
openings in mm
a
A 6.8 4.6 4.0 3.4 3.0
B - 5.0 4.2 3.6 3.2
C--4.43.83.4
D---4.03.6
E----3.8
a
Punch diameter of the aspiration reducing film sheet
A
B
CDE
FAS / FCS
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