Technical / Programming Manual
FT128 Rev 2.2
54
The detector has unleaded soldering.
To be plugged in an Analogue base (3312 / 4313 / 3379).
Built-in LEDs are lit to indicate that the detector
has activated a fire alarm.
Prepared for mechanical lock (screw attached) – if required.
Via EBLWin, the mode of operation can be selected as follow:
a) Two presentation numbers (address): 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
. (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.
If alternative b) is to work with "OR-functionality" or with a "Decision algorithm",
program this via EBLWin using either of these functionality options:
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
> 58.
Pre-warning will be activated if:
58 > temperature (°C) + adjusted smoke value
50
> 50.
The "Decision algorithm", see Figure 24, can be used to reduce 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). In a real fire condition, the room temperature will rise
rather fast and less smoke is required to activate fire alarm. Very little
smoke requires a "high" temperature to activate fire alarm and a lot of
smoke will activate fire alarm also at a "low" temperature.
i.e. the heat detector and/or the smoke detector.
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.
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 EBLWin. The temp. Cannot be lower than 0°C in the algorithm / graph.
Zone- Address
001-01(smoke or
heat)
Technical address
000123
20°C => 3.8 %/m
↓ ↓
40°C => 1.8 %/m
Zone-Address
001-01 (smoke)
001-02 (heat)
COM loop
address
e.g. 123
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