VESDA by Xtralis
VESDA VLF-500 Product Guide
www.xtralis.com
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4
Commissioning
4.1
General
The VESDA VLF has been designed to simplify commissioning processes. The AutoLearn function allows the
unit to assess its environment and setup appropriate alarm and flow thresholds. The unit may also be
programmed through Xtralis VSC software, for all programmable settings. For further information refer to
Chapter 7 on page 37.
Note:
Detectors should be commissioned with a smoke test.
Flow rates outside the detector’s operating limits will cause overflow or underflow faults and prevent
normalization from occurring.
Prior to commissioning the detector, check:
1. That the power is connected and on.
2. That the pipe network is clean and correctly fitted with all joints correctly seated and sealed (except the
endcaps and pipe which enters the detector which must not be glued).
3. That the exhaust deflector is fitted (unless exhaust is returned to the protected environment).
For code-specific information, refer to Codes and Standards Information for Air Sampling Smoke Detection on
page iii.
Legend
A
AutoLearn Smoke button
B
AutoLearn Smoke indicator
C
AutoLearn Flow indicator
D
AutoLearn Flow button
Figure 4-1: Interface display
Notes:
l
It is important that the protected area is working under normal operating conditions when operating the
AutoLearn processes.
l
AutoLearn functions can be de-activated by a second press of the appropriate button. This will leave
the thresholds at their default settings and not at the settings prior to AutoLearn.
4.2
AutoLearn Smoke
AutoLearn Smoke is initiated by pressing the recessed button numbered 1, which is located under the field
service access door.
During the AutoLearn Smoke process, the VESDA VLF determines the average smoke and peak smoke
obscuration levels and sets suitable alarm thresholds for the operating environment. This process will
minimize false alarms due to normal environment smoke variations.
