Bosch FAS‑420‑TP Series - Page 71

Aspiration smoke detector LSN improved Planning | en 71
Bosch Sicherheitssysteme GmbH Operation guide 2020.04 | 6.1 | F.01U.029.275
A
B
X
Y
I krit.
I
S
ti
c
h
A
I
Stich
B
I
S
t
i
c
h X
I Stich Y
.........
FAS / FCS
B
X
Y
I krit.
.........
A
C E
D
X
Y
I krit.
.........
D
A B
C
X
Y
I krit.
.........
D
A B
C
E
FAS / FCS
FAS / FCS
FAS / FCS
The branch pipes must be projected in accordance to the figure (project planning with branch
pipes). The project planning of I-pipe described in the figure must be copied to every single
sampling branch of other pipe forms (U, M, double-U pipe system).
Referring to the project planning with burs please notice that the “critical length” (lkrit.) of a
project planning does not exceed the maximum total length of pipe respectively of branch
(referring to U, M, double-U pipe system). The critical length described the sampling point
which is located most distantly from FAS-420.
Two aspiration apertures in total can be projected on each branch pipes at which the minimal
and maximum distance between the aspiration apertures must be respected.
Opening diameter
The opening diameters are valid for the projected aspiration apertures in accordance with the
chapter „Opening diameter for standard project planning“.
FAS / FCS