VESDA by Xtralis
VESDA VLI Product Guide
www.xtralis.com
43
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
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
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 isolated, 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
To set the detector to standby, press and hold the Reset / Disable button for 2 seconds. The
Disabled LED will illuminate and the aspirator will turn off.
To re-activate the unit, press and hold the button for 2 seconds.
While the detector is in standby mode, any faults may be cleared by pressing this button once.
The button will not operate if:
l
a remote reset switch has been fitted to the Reset (GPI) terminals and is set to the Isolate
position; or
l
the Reset/Disable button has been locked out in the programming.
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