Incite Fire ASD 532, Operating Manual

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Function
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2 Function
2.1 General operating principle
In the sampling pipe tube network, the fan generates a vacuum which results in fresh air continuously reaching the detector
housing via the sampling pipes. In this way the smoke sensor is constantly supplied with new air samples from the monitored
area. Should the smoke concentration exceed the permissible value, the ASD 532 triggers an alarm. The alarm is indicated
visually on the ASD 532 and can be transmitted via a potential-free change-over contact to a superordinate fire alarm control
panel.
The operational reliability of the aspirating smoke detector depends on the functional reliability of the smoke sensors and on
the constant air supply to the system. A fan failure, blockage of the sampling holes or pipe breakage must be communicated to
the fire alarm control panel in the form of a fault signal. This condition is satisfied by the airflow monitoring of the ASD 532.
Fig. 1 General operating principle
ASD 532
Housing
Smoke sensor
chamber
Installation location
for additional module
Cable entries
Monitoring area
Sampling
holes
Sampling pipe network
Smoke sensor Airflow sensor
Fan
Air outlet
AMB ASD Main Board
ASD532 Operating Manual