Commissioning; Autolearn Smoke; Commissioning Smoke Test - VESDA VLQ-100 Product Manual

VESDA by Xtralis
6

Commissioning

The VESDA VLQ has been designed to simplify the commissioning process. The AutoLearn function allows
the unit to assess its environment and setup appropriate alarm thresholds.
The detector is monitored during commissioning using Xtralis QSC.
Once the VESDA VLQ detector has been commissioned, it will report alarms and faults according to the
parameters defined during installation.
Note: Detectors should be commissioned with a smoke test.
Prior to commissioning the detector:
1. Check that the pipe network is clean and correctly fitted with all joints correctly glued (except where the
pipe enters the detector, which must not be glued).
2. Check that the power is connected and on. Let the detector run for around 5 minutes. Ignore the faults
during this time. Reset the detector after 5 minutes of operation.
3. Normalize the airflow. This takes approximately 5 minutes.
4. Reset the detector after normalization. It should now be running without faults.
It is important that the protected environment is representative of normal operating conditions during the
AutoLearn process.
For code-specific information, see Codes and Standards Information for Air Sampling Smoke Detection on
page iii.
6.1

AutoLearn Smoke

AutoLearn Smoke is initiated by using controls on the front panel or from within Xtralis QSC.
During the AutoLearn Smoke process, the detector determines the average smoke and peak smoke
obscuration levels and sets suitable alarm thresholds for the operating environment. This process will
minimize nuisance alarms due to normal environmental background variations.
During the learning cycle, if an alarm condition occurs, AutoLearn will not complete its cycle. In this situation
the user must restart the AutoLearn process. If AutoLearn is halted, the alarm thresholds will be left at the
previous settings.
Conditions experienced during learning are assumed to be representative of normal operating conditions.
The AutoLearn Smoke learning times range from 15 minutes to 2 hours.
Note: AutoLearn Smoke thresholds are volatile, therefore if thresholds are set using AutoLearn smoke
then it must be run each time the detector is powered up.
6.2

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.
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VESDA VLQ Product Guide
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