72
en | Installation of the Pipe System
FAS-420-TM Aspirating Smoke Detector
F.01U.088.878 | 4.1 | 2010.11
Operation Guide
Bosch Sicherheitssysteme GmbH
5.5
Air filter
5.5.1
Installing the Air Filter Box
Figure 5.6
Boring distances of holes in base of FAS-ASD-WS air filter box
Filter box
1.
To use the filter box in the pipe system, use the two PG29 filter screw connections
supplied.
2.
Install these cable glands in precisely the same way as for the pipe adapter, for example.
3.
When installing the filter, note the throughflow direction, which is specified on the type
plate on the side of the lower part of the housing.
4.
Screw the air filter housing directly onto the wall with the lower part of the housing.
Installation material
Cylinder or flathead screws are suitable for wall mounting:
–
Maximum thread diameter: 4 mm
–
Head diameter: 5 to 7 mm.
5.6
Air-return pipe
Feed the air-return pipe into the designated pipe connection of the FAS-420-TM. The air-
return pipe fits perfectly in the connection and guarantees a firm hold.
11
0
90
Figure 5.7
Installing the air-return pipe
1
Air-return pipe (aspiration pipe)
FA
S-420-
TM
ser
ies
1
NOTICE!
The pipe must be fixed immediately in front of the unit so that the pipe does not pull out of
the pipe connection due to any change in length that occurs (see
Section 5.1 Length Change of
the Pipe System, page 68
).
Summary of Contents for FAS-420-TM
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