VoidAlert TM heat sensitive sensor-wire is installed through the protected area between the VoidAlert TM Remote Indicator and VoidAlert TM Test Point. The Test Point is typically installed in an accessible location to facilitate ongoing engineer maintenance.
The VoidAlert TM ‘Test-Point’ incorporates a keyswitch with ‘normal’ and ‘test’ positions. Operation of the key switch tests the system for both ‘Open Circuit’ and ‘Fire’ conditions. In order to fault test the sensor-wire, the ‘test’ mode key position is selected and a simulated fire signal is generated to activate the Fire Alarm System. VoidAlert TM can be interfaced with all types of Fire Alarm System including conventional and addressable.
The VoidAlert TM Remote Indicator illuminates when the system is activated.
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British Standard Design requirements...
22.2d) If the system Category is such that automatic fire detection should be provided in any area that contains a horizontal void of 800 mm or more in height, automatic fire detection should also be provided in the void.
22.3j) Ceiling obstructions, such as structural beams, deeper than 10% of the overall ceiling height should be treated as walls.
NOTE 10 Within horizontal voids, beams or obstructions that are deeper than 10% of the overall depth of the void regardless of whether the void is above the ceiling or below the floor, ought to be treated as walls that subdivide the void.
VoidAlertTM is a brand of Avansys
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