Panasonic Eco Solutions Nordic AB
MEW01622 Rev: - EBL128 Planning Instructions V2.0.x
124
15.4 Alarm delay time
The alarm delay time will be different for the different type of
detectors depending on the cause of alarm, Area alarm algorithm and
the values before / after the fire alarm threshold level was exceeded.
4452: Normally 9 seconds.
4401:
4400:
data1 = The average smoke obscuration value (S) for 60 seconds before the alarm
threshold level was passed.
data2 = The sum of the difference between the smoke obscuration value (S) and the
alarm threshold level every second for nine seconds after the counter shows "9".
data2' = The sum of the difference between the 2S+deltaT value and alarm threshold
level every second for nine seconds after the counter shows "9".
NOTE!
Max. alarm delay time is 60 seconds.
If the cause of alarm is T or deltaT the alarm delay time will be 9 seconds.
The alarm delay time function will be cancelled after 18 seconds if one of the
following conditions is true:
S (%/m) > fire threshold level (S) x 2
T (°C) > fire threshold level (T)
deltaT (°C/168 sec.) > fire threshold level (deltaT)
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