Bosch FAD-420-HS-EN Installationsanleitung Seite 60

60 en | Installation
Figure 4.4 Drilling jig
2.
3.
4.
Figure 4.5 Position of the drilling jig
5.
6.
7.
Figure 4.6 Expanding nuts #10-24
F.01U.033.733 | 5.0 | 2011.11
Place drilling jig in the selected installation location on the
ventilation duct and stick it down (see Figure 4.5).
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 (see Figure 4.6) 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.
Now remove both screws.
Installation guide
No. Description
∅ 44.5-mm holes for sample
a
tube and ventilation tube
∅ 9.5-mm holes for securing
b
housing
No. Description
c Ventilation duct
d Drilling jig
Bosch Sicherheitssysteme GmbH
Duct Smoke Detector