54
en | Installation
Duct Smoke Detector
2019.02 | 9 | F.01U.033.733
Installation Guide
Bosch Sicherheitssysteme GmbH
Turbulence mainly occurs near connecting flanges, branches, tight bends, and long, straight
ducts.
Place the FAD-420-HS-EN at a distance of at least three times the width of the ventilation duct
[b
≥
3
x
d] away from these critical areas (see Figure before).
3.3
Housing position
The FAD-420-HS-EN must only be mounted in a vertical or horizontal position.
1
2
3
Figure
3.2: Position of housing on the ventilation duct
No.
Description
e
Airflow direction
4
Installation
4.1
Sample tube
Sample tubes must extend over the entire width of the ventilation duct and are therefore
available in three different lengths:
–
D344-1.5 (0.46
m/1.5
ft)
–
D344-3 (0.91
m/3
ft)
–
D344-5 (1.52
m/5
ft)
Figure
4.1: Sample tube
a Locating screw
b End plug
