Air-Return Pipe; Three-Way Tap - Bosch FAS-420-TM-R Operation Manual

Aspiration smoke detector LSN improved
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Installation material
Cylinder or flathead screws are suitable for wall mounting:
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6.6

Air-return pipe

Installing the 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.
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 Length Change of the Pipe
System, page 67 ).
6.7

Three-way tap

Installing the three-way tap
Bosch Sicherheitssysteme GmbH
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.
Screw the air filter housing directly onto the wall with the lower part of the housing.
Maximum thread diameter: 4 mm
Head diameter: 5 to 7 mm.
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Operation guide
Installation of the pipe system | en
1 Air-return pipe (aspiration
pipe)
1 Blast air/compressed air
connection
2 Pipe system connection
3 Aspirating smoke detector
connection
4 Air filter (optional)
2020.04 | 5.1 | F.01U.088.878
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