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Panasonic Electric Works Nordic AB
MEW01091
Rev: 3
Exhausts
Exhausts from cars / trucks, lift trucks, lawn mowers, etc. influences
smoke detectors (sensors). If windows and doors are open, exhausts
can "slip in" that way.
Lack of maintenance
Smoke detectors (sensors) are influenced by their environment and
become "dirty". In an analog system (like EBL128) a Service signal is
given when it is time to clean or exchange the smoke detectors
(sensors). The alternative is to exchange detectors at even intervals, to
be on the safe side.
Change in activities or wrong choice of detector
If the activities in the premises are altered, the detector choice might
also need altering. Due to special environments, see above, an in-
appropriate detector type might have been chosen from the beginning
and thus cause unnecessary alarms.
Miscellaneous
Choosing another type of detector, e.g. a multi detector (with both
heat and smoke detection), can solve certain problems. Note that the
coverage area can be different for different types of detectors.
It is however not always the best action to change detector type. Here
is a list of other actions, programmed via Win128, which can be used:
Another alarm algorithm can be used, e.g. during working
hours.
Co-incidence (two units) fire alarm activation can be used.
In an installation with addressable detectors / sensors (e.g.
EBL128), the affected detectors can be individually disabled
(or whole zones) when the work is in progress. Bear in mind
that the smoke spreads, and consideration must be taken to
adjacent detectors/zones. Disablements can be done
automatically via a time channel (built-in or external) or via
menu (H2/B1-B3). Automatic re-enabling can be used.
If there is an alarm organisation for the personnel on site, the
alert annunciation function can be used.
Pre-warning can be used.
136
EBL128 Operating Instructions V1.1.x
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