Housing Position; Installation; Sample Tube - Bosch FAD‑420‑HS‑EN Manual Del Usuario

54 en | Installation
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
Figure 3.2: Position of housing on the ventilation duct
No.
e
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:
–
–
–
Figure 4.1: Sample tube
2019.02 | 9 | F.01U.033.733
2
Description
Airflow direction
D344-1.5 (0.46 m/1.5 ft)
D344-3 (0.91 m/3 ft)
D344-5 (1.52 m/5 ft)
a Locating screw b End plug
Installation Guide
Duct Smoke Detector
3
Bosch Sicherheitssysteme GmbH