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7 Testing
Note:
the system checks should only be carried out by authorised personnel. Before undertaking any testing,
make sure that the proper authorities have been informed and that signals to the monitoring and signalling
control panel have been disabled, in order to prevent unwanted alarms.
7.1 Point detectors
With the unit powered up and plastic top cover removed, detector operation can be tested using a low
concentration smoke source or aerosol spray.
The point detectors can also be checked using a permanent magnet positioned at 7 o’clock on the sensor
cover.
This test electronically simulates the effect of smoke in the optical chamber.
7.2 System
Before checking the system as a whole, make sure the top cover of the unit is in place.
As a minimum requirement, a small amount of smoke should be introduced to the last sampling hole on each pipe
(or branch).
The choice of smoke source is dependant on the installation but in all cases the
smoke must be present for the duration of the test – aerosol sprays do NOT work on aspirated systems.
If the sampling holes are accessible then a basic check can be carried out with smoke matches or lighted tapers,
etc.; however, to carry out a test in which performance can be measured, please refer to Appendix A of the Code
of Practice for Aspirating Systems published by the F.I.A.
Summary of Contents for ILS-2
Page 1: ...1 ASPIRATING SMOKE DETECTOR 1 ZONE 2 DETECTORS ILS 2...
Page 13: ...13 sensors...
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