VESDA-E VEP-A10-P Product Guide
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Alarm Level
AutoLearn Smoke Range
Alert
0.005% – 2.0% obs/m (0.0016% - 0.625% obs/ft)
Action (Pre-Alarm) 0.005% – 2.0% obs/m (0.0016% - 0.625% obs/ft)
Fire1 (Alarm)
0.010 % – 2.0% obs/m (0.0031% - 0.625% obs/ft)
Fire2
0.020 % – 20.0% obs/m (0.0063% - 6.25% obs/ft)
Table 6-1: AutoLearn Smoke range
For code-specific information, see Codes and Standards Information for Air Sampling Smoke Detection on
page iii.
6.2
AutoLearn Flow
AutoLearn Flow process is initiated within Xtralis VSC or the AutoConfig button located on the main board of
the detector.
During the AutoLearn Flow process, the detector normalizes the airflow and then monitors over time the
average, maximum and minimum air flow levels and sets suitable air flow thresholds that will not give rise to
nuisance flow faults due to normal flow variations.
During the learning cycle, if a flow fault is reached, AutoLearn will not complete its cycle. In this situation the
user must restart the AutoLearn process. If AutoLearn is halted, the flow thresholds will be left at the previous
settings.
Conditions experienced during learning are assumed to be representative of normal operating conditions.
The AutoLearn Flow learning times can be set between 15 minutes and 16 days, with the default being set to
14 days.
6.3
Commissioning Smoke Test
It is recommended that a smoke test be carried out to verify the integrity of the pipe network, to demonstrate
that the system is working and to measure the transport time to the detector.
This test involves introducing a smoke sample at the furthest sampling hole and then measuring the time
taken for the smoke to travel to the detector. Results are logged and compared to subsequent tests to note
variations of the system.
Refer to the VESDA-E Commissioning Guide (document #10195) for details of the commissioning smoke
test.
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