Panasonic EBL512 Operating Instructions Manual page 146

Panasonic Electric Works Fire & Security Technology Europe AB
MEW00748 Rev: 1 Operating Instructions Fire alarm system EBL512 V2.3.x
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 EBL512) 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 can solve certain problems. Bear
also in mind, 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 Win512, which can be used:
• Another alarm algorithm can be used.
• Alarm delay for smoke detectors / sensors can be used.
• Two-zone or two-unit dependent (co-incidence) fire alarm
activation can be used.
• In an installation with addressable detectors / sensors (e.g.
EBL512), 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.
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