Bosch FAD-420-HS-EN Duct Smoke Detector User Manual
Page 61
Duct Smoke Detector
Installation | en
61
Bosch Sicherheitssysteme GmbH
Installation guide
F.01U.033.733 | 5.0 | 2011.11
8.
Place the foam rubber sealing rings on the back of the FAD-
420-HS-EN on the mounting flanges of the sample tube and
ventilation tube (see Figure 4.7).
9.
Mount the FAD-420-HS-EN on the ventilation duct and use
the #10-24 x 1 in. screws to secure onto the expanding
nuts (see Figure 4.8).
Do not over-tighten the screws. Over-tightening the screws
can cause the ventilation duct sheet to buckle!
10. Remove the ventilation tube and sample tube from the
box. Check whether the end plug is inserted into the
sample tube (see Figure 4.9).
Figure 4.7
Foam rubber sealing rings
No.
Description
e
Ventilation tube mounting
flange
f
Ventilation tube mounting
flange
g
Foam rubber sealing rings
Figure 4.8
Housing installation
No.
Description
h
Ventilation duct
i
Detector housing
k
#10-24 x 1 in. screws
Figure 4.9
Sample tube and ventilation
tube
No.
Description
l
Ventilation tube
m
The ventilation tube must be
open at both ends!
n
Sample tube
o
The end plug must be
inserted!