VESDA VLC, Maintenance Manual

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VESDA Maintenance Guide VESDA
4 www.xtralis.com
1.3 Important pre-maintenance preparations
All maintenance procedures require the VESDA system to be disabled during maintenance and testing.
Failure to disable the system may lead to unwanted alarms and initiation of fire response systems. When the
VESDA system has to be disabled, alarms will be displayed but no relays will be tripped. Prior to isolating the
VESDA system for maintenance, you must do the following:
1. Inform the appropriate supervising authority about the risk associated with isolating the VESDA Address.
2. Ensure that any ancillary devices, dependent on the detector, are appropriately isolated. When a detector
is isolated, a fault is signaled at the monitoring system. This is acknowledged either by wiring the isolate
relay in series with the fault relay (VESDA VLP and VESDA VLS) or by configuring the fault relay (fault
number 3) to trigger an isolate.
1.4 Maintenance Schedule Summary
Table 1-1 below contains a summary of the suggested maintenance schedule for clean environments.
Table 1-1: Maintenance schedule summary
Maintenance Task Every Visit Monthly Six Monthly Annual Biennial
Check Detector & Filter Refer to Recommended VESDA Maintenance Period & Filter Replacement
Frequency (Appendix B).
Check Power Supply ●
Inspect Pipe Network ●
Check Air flow (per pipe) ●
Perform System Integrity
Smoke Test ●
Clean Sampling Points ●
Flush Pipe Network ●
Notes:
l
The VESDA VLI detector is designed for use in industrial applications and harsh environments. The
detector monitors the condition of consumable components and will raise faults when a part requires
replacement. Refer to the VESDA VLI Product Guide for further information.
l
If local codes and standards for the site require more frequent maintenance, these guidelines must
override those suggested in this Maintenance Guide.
l
Maintenance schedules may also vary according to operating conditions.
l
Sampling pipe flushing and the cleaning of sampling holes should be conducted as frequently as required
by the detector type and environment.