76 en | Installing the Aspiration smoke detector Aspiration smoke detector LSN improved
2020.04 | 6.1 | F.01U.029.275 Operation guide Bosch Sicherheitssysteme GmbH
5.2 Installing the detector module
Notice!
Only DM-TT-50(80), DM-TT-10(25) and DM-TT-01(05) detector modules certified to VdS may
be used.
The detector module settings are configured via the RPS software. All DIP switches on the
detector module must be set to "OFF".
The sensitivity value is based on measurements with standard test fires (old value in
brackets).The activation threshold for the airflow malfunction is set to 20% volume flow
change by default. Higher values are not permitted within EN54‑20 or ISO 7240-20.
1
2
5
6
3
4
FAS-420
series
HEAD1 DIAG HEAD2 DISPLAY
Installing the Detector Module
Caution!
Electrostatic discharge (ESD)! This can damage electronic
components. Ground yourself using a wrist strap or take other suitable measures.
Proceed as follows to install the detector module:
1. Open the unit by carefully unlocking the housing cover's quick locks.
2. Carefully pull the display board connection cable from the motherboard (DISPLAY
connection) and remove the housing cover. Once the unit is installed, fix the cover with a
service clip.
Notice!
FAS-420-TP2 and FAS-420-TT2 variants:
These unit types are factory prepared for the installation of two detector modules:
The fan covers for both aspiration pipes are removed.
The two pipe system connections are cut out.
The pin pair on jumper BR1 is open.
(See
Number of detector modules, page 78
)
1. Spread the brackets provided for fixing the detector module slightly apart.
2. Carefully insert the detector module until you hear it click into place. Make sure that the
used detector module is fixed tightly and securely by the bracket by additionally pushing
together the brackets by hand.
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