Panasonic Electric Works Nordic AB
MEW01351
Rev: -
Planning Instructions Fire alarm system EBL512 G3, V1.1.x
42
4313). Built-in LEDs are lit to indicate that the detector
25
has
activated a fire alarm. Prepared for mechanical lock (screw
attached) – if required.
Via WinG3, it is set how the detector shall operate:
a)
Two presentation numbers (addresses):
The detector
unit works as two separate detectors. The smoke detector is
programmed for one zone-address and the heat detector for
another zone-address
26
. (Can be used to disable e.g. the smoke
detector during working hours and/or in control expressions for
programmable outputs).
b)
One presentation number (address):
The detector unit
works as one detector and is programmed for one zone-address.
Via WinG3 is set if the detectors in alt.
b)
shall work with "OR-
functionality" or with a "Decision algorithm":
b1)
OR-functionality:
Either the heat detector
or
the
smoke detector will activate fire alarm. This alternative is
recommended in most cases.
b2)
Decision algorithm:
Fire alarm will be activated if:
temperature (°C) + adjusted smoke value
27
> 58.
Pre-warning will be activated if:
58 > temperature (°C) + adjusted smoke value
27
> 50.
The "Decision algorithm"
28
, see figure can be used to
reduce so called false alarms (nuisance alarms), because at
a normal room temperature, more smoke is required to
activate fire alarm than when the room temperature is high
(or is rising). By a real fire, the room temperature will rise
rather fast and less and less smoke is required to activate
fire alarm. Very little smoke require a "high" temperature
to activate fire alarm and very much smoke will activate
fire alarm also at a "low" temperature.
25
I.e. the heat detector and/or the smoke detektor.
26
The zone number has to be the same for both detectors.
NOTE!
When
counting alarm points these "two detectors" are regarded as two alarm points.
27
Adjusted smoke value = obscuration (%/m) x 10. Default heat alarm
levels (50°C / 58°C) and smoke alarm offsets (50 / 58) can be changed via
WinG3. The temp. can not be lower than 0°C in the algorithm / graph.
28
The decision algorithm is a violation to the EN54-7 standard.
Zone-Addr.
001-01 (smoke
or heat)
COM loop address
e.g. 123
20°C => 3.8 %/m
↓ ↓
40°C => 1.8 %/m
