FAS-420-TM Aspirating Smoke Detector Planning | en 49
Bosch Sicherheitssysteme GmbH Operation Guide F.01U.088.878 | 4.1 | 2010.11
3.8 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 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.
3.8.1 I-Pipe System - Simplified Planning
1 Pipe System
FAS-420-TM
FAS-420-TM-R
FAS-420-TM-RVB
Figure 3.11 I-pipe system, e.g. for equipment protection
Limiting values 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
– Additional pipe Ø 12 mm
40 m
5x3m
Max. total pipe length per pipe system for a fan voltage
< 10.5 V
–Pipe Ø25mm
– Additional pipe Ø 12 mm
30 m
5x3m
Max. number of air sampling openings (n) per pipe
system
5 units
Min. distance between 2 air sampling openings 0.1 m
Max. distance between 2 air sampling openings 4 m
Min. distance between 2 air sampling openings for fire
source identification
3 m
I-pipe system Number of air sampling openings
12345
Ø of all air sampling
openings in mm
a
6.8 4.6 4.0 3.6 3.4
a
Punch diameter of the aspiration reducing film sheet
FAS / FCS
E
D
C
B
A
10
9
8
7
6
5
4
3
2
1
FAS-420-TMseries
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