VESDA
®
LaserFOCUS VLF-500 Product Guide
49
2.13 Frequently Asked Questions about VLF (FAQs)
Note:
For FAQs not specifically related to VLF, please visit www.xtralis.com.
What are the order numbers for the VESDA LaserFOCUS detectors?
Part Numbers can be found on the datasheets (visit www.xtralis.com to download datasheets).
Where do I obtain an approval certificate for my VESDA LaserFOCUS?
Visit the approval website or www.xtralis.com for the latest information.
What do the buttons on the VESDA LaserFOCUS front panel do?
The
RESET
button resets all latching faults.
The
DISABLE
button disables the fire relay outputs and reports a fault.
Pressing the
DISABLE
button for 6 seconds will put the detector into Stand-by mode.
Pressing
RESET
and
DISABLE
simultaneously accesses the Instant Fault Finder function. A
number flashes on the round display to indicate which fault, if any, is present. The user interface
is described in the user panels beneath the service door.
The
TEST
button simulates a Fire 1 alarm condition and the alarm relay is activated after the
appropriate delay. Before pressing this button, you must ensure that the reporting device is
isolated to prevent the initiation of
FIRE
response actions.
AutoLearn Flow
and
AutoLearn Smoke
will start the environment study to create specific
thresholds for the area being covered, assuming that the environmental conditions during the
study period are comparable to normal operating conditions. The default period for AutoLearn is
14 days. Pressing the
AutoLearn Flow
button also normalizes the detector’s airflow.
Pressing an
AutoLearn
button a second time aborts the AutoLearn function.
What are the permissible flow normalisation limits for VESDA LaserFOCUS detectors?
VLF-250: minimum = 12 liters per minute, maximum = 24 liters per minute
VLF-500: minimum = 12 liters per minute, maximum = 54 liters per minute.
What do I do if my VESDA LaserFOCUS is showing a flow rate of 0 l/min?
Check whether the unit is in standby mode on the front panel. Pressing the standby button for 6
seconds will cancel this mode, however, it is advisable to first identify the reason for the detector
being in standby mode. VSC will also indicate standby mode, usually with a blue box that
surrounds the detector in the VSC device tree. Check if there is a FLOW SENSOR FAIL fault. If
there is, you will need to return the detector for repair.
Why did VESDA LaserFOCUS AutoLearn Flow fail?
If the flow rate is outside of the detector operating limits, AutoLearn Flow will not work.
Why is VESDA LaserFOCUS AutoLearn Smoke having problems?
If a FIRE is detected, AutoLearn is aborted and the appropriate alarm raised. Environments with
a high background smoke or pollution level, where this background exceeds the original
threshold levels, will also cause AutoLearn to abort. AutoLearn should be run when the
environment is displaying typical operating conditions. The default AutoLearn period is 14 days.
When the Instant Fault Finder is pressed (Reset + Isolate buttons together), why do the
AutoLearn Flow and AutoLearn Smoke LEDs start flashing instead of the fault numbers
lighting up? The flashing stops when the blue buttons are released.
