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Programmable output can be activated using specific trigger type during the delay of a
specific alarm point e.g. 3379 sounder base.
Function for conventional zone line inputs:
The "Delayed" check box for addressable multipurpose I/O unit (3361) zone line Input 0 (Z)
and 8 zones expansion board (4580) input is called Alarm Verification Facility "AVF", when
required, check box
17.11 below.
17.9.2
Specific time delay application
In this specific application of the "Delayed" alarm function, the alarm activation type for an
output unit (3379) must be set (in EBLWin) to "DelayedAlarmZoneAddress" (or zone). In
this case, when the alarm point activates an alarm, the output unit 3379 will sound during
the time delay period without signalling alarm to the CIE. If the alarm point still in alarm
after the time delay elapsed, the CIE will be in full alarm condition. The delay for this
application can be selected for up to 255 seconds.
The function is the same as the "AAF" without the wall mounted module "AAM".
Application Example:
A typical application for the delayed alarm function would be a residential accommodation
where false alarms may cause a brigade call. Sounder base(s) 3379 mounted inside the
unit will activate upon receiving a delayed alarm from a smoke detector for the delay period
configured in the system properties (0-255 sec). If the smoke is not cleared from the smoke
detector during the time delay, the control panel will go to full alarm condition. If the smoke
clears up within the delay time, the alarm will reset, 3379 will be silenced and the system
restores to the normal condition.
Several control expressions are available to cover any possible configuration:
DelayedAlarmZoneAddress (Zone, Address), true when a specific zone / address
is in delayed alarm state.
DelayedAlarmZone (Zone), true when a specific zone or any detector in a certain
zone is in delayed alarm state.
GeneralDelayedAlarm, true when any zone or zone/address is in delayed alarm
state.
17.10
Selective Alarm Presentation
Instead of having all fire alarms presented in all Control Units (default) it is possible to have
Selective Alarm Presentation, i.e. only fire alarms from selected Control Units will be
presented in the Control Unit respectively. This selection is done in EBLWin for the Control
Unit respectively.
17.11
Alarm Verification Facility (AVF)
In 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"
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
126
A zone with the AVF not selected would in this state activate a normal fire alarm in FT1020G3.
must be ticked. The AVF function is explained in chapter
126
will be registered in FT1020G3 but a fire alarm
113
Technical/Programming Manual
FT1020G3 Rev 2.2.1
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