Bosch FAS-420-TT Series - Detonation Safety Barrier; Test Adapter

Aspiration smoke detector LSN improved Installation of the pipe system | en 95
Bosch Sicherheitssysteme GmbH Operation guide 2020.04 | 6.1 | F.01U.029.275
Refer to
– Maintenance intervals, page 108
6.9 Detonation Safety Barrier
1
1
4
2
3
3
> 1 m
> 1 m
FAS-420 series
1 Detonation Safety Barrier
2 Air-return pipe connection
3 Steel pipe connection
4 Pipe system connection
The detonation safety barriers are integrated into the pipe system and the air return at a
minimum distance of 1m from the aspirating smoke detector. The detonation safety barrier is
glued to the FAS-420 on the side of the pipe system or the air-return pipe via a transition
screw connection and connected to the side of the unit via a steel pipe. The connection
between detonation safety barrier and steel pipe/transition screw connection is made using a
¾" screw connection.
Notice!
To create a gas-tight connection between the detonation safety barrier and steel pipe/
transition screw connection, a sealing tape or thread seal must be used.
The flow direction for installing the detonation safety barrier is secondary.
6.10 Test Adapter
1
2
FAS-420 series
Installing the test adapter in the pipe system
1 Test adapter
2 Pipe system connection
For test purposes, the pipe system connection is simply pulled out and the test pipe
connected directly to the aspirating smoke detector. However, this is not possible if the
aspiration pipe system has to be permanently mounted. A test adapter should be used for this
application.