Building Technologies A6V10334410_h_en_--
Fire Safety 2015-09-29
Limits of the normalization of the airflow
(only for firmware versions ≥ 3.10)
The normalization process can only be carried out within a defined range for the
airflow values. Please refer to the following table for the limits of the range:
Lower limit for the airflow
Upper limit for the airflow
FDA241 15 l/min 57 l/min
FDA221 15 l/min 48 l/min
If the airflow to be normalized is outside the permitted range, the aspirating smoke
detector indicates a general fault during normalization and normalization is
canceled:
The fault indicator lights up.
The 'Fault' relay output [➙ 69] opens.
The buzzer sounds continuously.
If the aspirating smoke detector is operated on a FDnet/C-NET detector line, a
message is transmitted to the control panel.
The LED on the bar graph also shows the deviation from the upper or lower limit.
No normalization of the aspirating smoke detector
False alarms due to false measurements
● Only use normalized detectors for fire detection.
See also
Opening and closing the housing cover when the power
supply is switched on [➙ 46]
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