Technical / Programming Manual
FT128 Rev 2.2
113
Each AAM is configured as an AAFC
zone. Each AAFC zone can include up to 5 smoke
detectors. If the analogue value of one or more smoke detector in an AAFC zone reaches
the alarm level, the alarm acknowledgement process starts and the sounder base will be
activated.
The occupant has 30 seconds to press the button on the AAM (acknowledgement time)
which provides the occupant with up to 90 seconds to investigate the alarm and clear up
the smoke.
The alarm investigation period of 90 seconds is considered appropriate for protected areas
with normal levels of ventilation or accessibility. The investigating period is adjustable 0-9
minutes to satisfy other applications. The acknowledgement period also is adjustable 0-
120 seconds.
A red LED on the front cover indicates that the acknowledgement button has been pressed;
it remains illuminated until the investigation period expires.
A momentary action switch is provided to acknowledge the alarm and silence the sounder
base 3379. Pressing the button during the investigation period (while LED is on) will not
extend or re-start the timer. The following flow chart explains the sequence of the AAF
process.
Figure 41 Alarm Acknowledgement Facility (AAF) Flow Chart
During the AAF process, an AAF alarm will be indicated in the CIE display ….
…. during the acknowledgement period (AP):
AAF zone xx, activated
The alarm acknowledgement facility control AAFC is the trigger type in EBLWin to activate the AAM.
Detector LED ON
Detector LED OFF
AAM/LAAU LED
OFF
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