VESDA by Xtralis
VESDA VLI Product Guide
www.xtralis.com
53
7
Maintenance
To maintain the VLI detector at its peak performance level, the recommended maintenance schedule shown in
Table 7-1 below should be followed.
Table 7-1: Recommended maintenance schedule for the VLI detector
Maintenance Check
Quarterly
Six
Monthly
Annual
Biennial
Quadrennial
Power Supply and Battery
Check Pipe Network
Pipe Integrity Smoke Test
Check Pipe Flow
Clean Sampling Point
Flush Pipe Network
Replace Intelligent Filter
Replace Secondary Foam
Filter
Notes:
l
The above maintenance steps are preventative maintenance. The VLI detector is intelligent and will
therefore raise appropriate faults when a part requires replacement.
l
The recommended Intelligent Filter and Secondary Filter replacement intervals are based on average
background level of 0.05%/m (0.015%/ft). Lower average background levels result in less frequent
replacement and higher background levels may necessitate more frequent replacement.
l
Maintenance can be conducted by the original installer or an authorized distributor or service contractor.
l
The required frequency of maintenance checks may vary depending upon local codes and standards and
the environment of the installation.
Caution:
While the detector or zone is disabled, no fire warnings will be annunciated by the detector. Prior
to any maintenance or testing:
l
Inform appropriate supervising authority about the risk associated with isolating a detector
or zone.
l
Check to see if the detector is also being used by a third party.
l
Ensure that any ancillary devices dependent on the detector are isolated before work
commences.
7.1
Set the Detector to Standby
Setting the VLI to Standby mode deactivates the aspirator and stops all signaling.
To set the detector to Standby mode, select Go to Standby from the Device menu. The Disabled LED will
blink and the aspirator will turn off.
To re-activate the unit, select End Standby from the Device menu.
