VESDA
®
LaserFOCUS VLF-500 Product Guide
39
Maintenance schedule
To maintain the VESDA LaserFOCUS smoke detector in peak working order follow the
maintenance standards for your region and where no recommended standard exists see the
table below. Please note, for environments that experience high levels of contamination, the
frequency of maintenance will need to be increased. Maintenance should be conducted by a
qualified service contractor.
Table 10 - Maintenance schedule
Replace the Filter Cartridge (VLF)
The VESDA LaserFOCUS smoke detector uses a disposable dual stage air filter cartridge. This
filter removes dust contamination from sampled air and provides a clean air bleed to preserve the
detector chamber optics. The detector constantly monitors filter efficiency. To maintain the
operational integrity of the smoke detector, it is recommended that the filter be replaced every
2 years, or when a filter fault occurs or more often for environments that experience high levels of
contamination.
A fault is raised on the detector, when the filter needs to be replaced. During the replacement
process the detector needs to be informed that a new filter has been installed.
Note:
Prior to any work or maintenance being carried out on the VESDA LaserFOCUS
take the necessary steps to advise the monitoring authority that power may be
removed and the system disabled.
Note:
Ensure the area surrounding the filter is clear of dirt and debris prior to replacement.
Note:
The filter is for single use only, it cannot be cleaned and re-used.
Action
Frequency
Details
Check pipe
network
6 monthly
Check pipe connections to ensure all pipe runs are
intact and that pipe supports and joints are firm.
Airflow
Yearly
Check air flow via VSC software (refer to the VESDA
System Configurator Manual
). Compare the current
reading with previous reading to determine if the flow
rate has reduced.
Smoke test
Yearly
Conduct smoke tests and verify detector performance
(refer to the System Design Manual).
Compare response times with those previously
recorded and investigate any discrepancies.
Check
power
supplies
Yearly
Test in accordance with suppliers instructions
Filter
replacement
2 Yearly
Recommended change out period. The filter status can
be checked via VSC software. Depending on the
environment, the filter may require more frequent
checking.
Clean
sampling
holes
As necessary
If frequent low flow faults occur clean the sampling pipe
network by back flushing (refer to the System Design
Manual).
