LaserPLUS Product Guide VESDA
®
2
Any smoke detected in the laser detection chamber is signaled to the main processor card. If the
presence of detected smoke is higher than the set thresholds it is reported as an alert, action, fire
1 or fire 2 alarm depending upon the alarm thresholds. The second stage filter further filters the
air to produce ultra clean air. The ultra clean air is used to clean the optical surfaces in the laser
detection chamber.
Figure 1 - Operation and internal air flow of a LaserPLUS
A
B
C
D
E
F
Legend
A Air inlets from pipe networks
B Air is drawn into the aspirator
C Some air is filtered and:
D flows into the chamber for testing
E is filtered a second time, then used to flush the chamber with
ultra clean air
F All air is then vented
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