Installing The Duct Smoke Detector - Bosch FAD‑420‑HS‑EN Manual Del Usuario

56 en | Installation
Example: For a ventilation duct with a width of 45 cm, cover six holes.
4.2

Installing the Duct Smoke Detector

Figure 4.4: Drilling jig
Preparation
Figure 4.5: Position of the drilling jig
1.
2.
3.
4.
Figure 4.6: Expanding nuts
5.
6.
2019.02 | 9 | F.01U.033.733
a ∅ 44.5-mm holes for sample tube and
ventilation tube
c Ventilation duct
Take the enclosed self-adhesive drilling jig out of the box and peel off the protective
paper from the back.
Place drilling jig in the selected installation location and stick it on the ventilation duct.
Drill two ∅ 9.5-mm holes in the ventilation duct for the two expanding nuts to secure the
housing, and drill the ∅ 44.5-mm openings for the sample tube and ventilation tube.
Remove the drilling jig, deburr sharp edges, and remove debris and dirt.
Place expanding nuts #10-24 in the two ∅ 9.5-mm holes
Screw the #10-24 x 1 in. screws into the expanding nuts and tighten by hand. This
ensures the expanding nuts are fixed securely in the ventilation duct.
The expanding nuts can be held securely with a pair of pliers to stop them turning as the
screws are screwed in.
b ∅ 9.5-mm holes for securing housing
d Drilling jig
Installation Guide
Duct Smoke Detector
Bosch Sicherheitssysteme GmbH