Brooks Firetracker FT128 CIE - Alarm Verification Facility (AVF); Alert Annunciation; Figure 39 Alert Annunciation Function

Technical / Programming Manual
FT128 Rev 2.2
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14.10 Alarm Verification Facility (AVF)
On some premises, AVF can be used to reduce false alarms. The function is valid for any
conventional Zone Line Input.
When the AVF is used, the function "Delayed alarm" (see above) is not valid. The function
"AVF" is selected in the dialog box for the Zone Line Input.
Function: A zone in "fire alarm state"
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will be registered in FT128 but a fire alarm will
not be activated. Within the first 15-20 seconds, the zone will automatically reset the
conventional detectors sensing smoke. If the smoke still exist in the smoke chamber within
the following 110 seconds, the zone will latch in "fire alarm state" and a fire alarm will be
activated in FT128, otherwise nothing will happen until the next time the zone is in "fire
alarm state"
.
14.11 Alert Annunciation
In some installations the Alert Annunciation function can be used to avoid false alarms to
the Fire Brigade. A time channel can be used to control this function.
Trained personnel on site are required to locate the fire and take the correct actions
depending on whether a real fire exists.
Normally analogue smoke detectors and zones with smoke detectors only, can be
programmed (via EBLWin) for alert annunciation. Heat detectors and manual call points
should not be programmed for alert annunciation. A manual call point can only activate the
AA function if there are no other fire alarms activated in the system, i.e. the second fire
alarm will turn OFF the AA function and the "Fire brigade TX" output will be activated
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.
The AA function is normally turned ON (enabled) during daytime only (i.e. working hours).
A time channel is used to turn ON / OFF (enable / disable) the AA function.
When the AA function is turned on (enabled) it is indicated by the LED Routing equipment
"Fire brigade tx delay" on the CIE front. Normally only one time channel is used for this
function but two or more channels can be used. The AA function can, as an alternative, be
continuously "on".
Note: The AA function can be de-activated (turned off) via menu H2/B11 and remains off
until it is turned on (normal) again via menu H2/B11.
Figure 39 Alert Annunciation function.
Alert Annunciation Function:
Indications, actions, etc. for an AA alarm are similar to a normal fire alarm except that the
output “Fire alarm” for routing equipment (Fire brigade TX)
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will not be activated directly.
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A zone with the AVF not selected would in this state activate a normal fire alarm in FT128.
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This is valid even if "Multiple alarms within same zone" is selected (via EBLWin).
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Note: Programmable outputs type "Fire brigade TX" will however be activated if not the following is added to
the control expression: AND NOT Alert Annunciation Activated.