IFS-2600 Installation & Programming Manual Page 37
P/N 10069 ECN08-0066
TIME DELAY AZF
The time delay AZF zone can be preset to any one of 6 time delays in the initial setup. This type of zone is
used for AS1668 smoke detection zones. Zone timing etc is as per AS1668-1991.
Example: Timer #1 = 60 seconds
Once the first alarm is received, the alarm LED is turned on steady; this indicates "PARTIAL ALARM"
condition.
The detector is then reset (by removing its power for 0.5 seconds) and a timer is also started for 60 seconds
(TIMER#1). Another timer of 10 seconds (TIMER#2) is also started. The zone must respond again within this
10 seconds (TIMER#2) to register another alarm.
Failure to receive another alarm within this 10-second period will return the zone back to its normal state
immediately and extinguish the alarm LED.
If an alarm is received, the detector is reset again and TIMER#2 is also reset.
This monitoring continues until the 60-second timer (TIMER#1) has elapsed and then the NEXT alarm signal
will trip the zone into "FULL ALARM". This is the stage at which all mapped relays, bells etc. will operate.
When "FULL ALARM" condition is reached, a third timer (TIMER#3) of 70 seconds is started. This timer is
used to prevent "hunting" of air conditioning fans as specified in AS1668
TIMER#2 is kept operating and alarm signals are still to be received as per previous. Alarm signals are
required continually to keep the zone in "FULL ALARM". Each time another alarm is received Timer#3 is
restarted (i.e. 70 seconds)
Failure to comply with TIMER#2 will result in the zone being returned back to its NORMAL state once
TIMER#3 has elapsed.
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