Venturi-Air Duct Kit
36 FB 798349 / 04.13
13 Maintenance
If the air duct kit or the FACP is undergoing service and maintenance work observe that no unwanted alarms
are activated and disconnect the master box (alarm transmission unit) if present.
To test the air duct detector enabled the test operation mode for this detector zone at the panel! Observe the
related informations in the manual of the Fire Alarm Control Panel.
1. Pull the seal of the service opening carefully outwards
and turn it aside.
2. Remove spraying nozzle from test gas can.
3. Press the valve of the test gas can towards the
inspection hole.
4. Apply test gas in the inside of the chamber by briefly
pressing the test gas can
5. Wait for alarm activation of the detector (red LED flashes,
as the case indication at the panel).
6. If the detector is not activated apply again some test gas
in frequent intervals.
7. Close opening with the seal after testing.
Fig. 26: Test alarm activation of the detector
To check the detector only the approved test gas (Part No. 769070) must be used. To prevent the
formation of ice on the detector, do not push the release button of the spray can for extended periods
of time.
Detector zones which are switched off or in test mode will not signal any alarms in case of fire!
13.1 Option replacement filter (Part No. 781444)
The Filter unit could be inserted in the enclosure to protect the fire alarm detector and the enclosure from
soiling in critical environments (high air pollution through dust particles) caused by the sampled air.
1. Open enclosure.
2. Remove filter.
3. Insert new filter pad carefully cambered to the shape of
the enclosure.
4. Push filter inside.
5. Close enclosure again properly.
6. Record filter replacement in the appropriate service
manuals.
Fig. 27: Filter replacement
The filter unit must be periodically (quarterly) proved if it is soiled and had to be replaced. Even in
clean ambient conditions the filter must be replaced after a year.
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