Bosch FAD-420-HS-EN Duct Smoke Detector - Manual (Page 56)

56 en | Installation/configuration notes Duct Smoke Detector
F.01U.033.733 | 5.0 | 2011.11 Installation guide Bosch Sicherheitssysteme GmbH
3 Installation/configuration notes
3.1 Prerequisite
The FAD-420-HS-EN Duct Smoke Detector is designed for use in
ventilation systems with air speeds from 1.5 m/s to 20 m/s.
Check the ventilation system specifications before installation
to ensure these limits are adhered to.
F Reed switch for bridging the tamper switch (x)
G Sample tube
H Ventilation tube
I 3-pole connector plug
J 2-pole connector plug
K #8-32 x 9/16 in. screws for mounting the securing flanges (L)
L Securing flanges for sample tube and ventilation tube
M #10-24 expanding nuts for installing housing on ventilation duct
N #10-24 x 1 in. screws for installing housing on ventilation duct
O Air filters for sample tube and ventilation tube
P Foam rubber sealing rings
x Tamper switch for monitoring unauthorized opening of the cover
Pos. Description
Figure 3.1 Typical installation position
No. Description
a Bend or other delay to the
airflow
b At least 3 x d
c Turbulence through the
bend (a)
d Width of the ventilation duct