TSA-1000
© 2008
–
2012 Telefire Fire & Gas Detectors Ltd
Revision 1.12
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– Page 5 of 5 –
The alarm delay can be programmed, PER ZONE, to OFF (No Delay, No Alarm
Verification) or to ON. Each detection zone can be programmed independently.
If the zone Alarm Delay is programmed ON, there is a 30 seconds alarm Delay. During
the delay period alarms are ignored. This is followed by a 180 seconds confirmation
period.
When a zone programmed for alarm verification is first triggered, the control panel resets
the zone in alarm, waits for 30 seconds (if Delay is ON) and enters a 180 seconds (3
minutes) confirmation period. During the 30 seconds delay period, alarms are ignored.
During the 180 seconds confirmation period, the control panel enters the alarm state
immediately if a trigger from the same zone or from another zone is received, even if the
other zone is programmed for alarm delay and confirmation).
If, during the alarm confirmation period, no alarm is received, the ECD reestablishes the
quiescent condition.
Each detectors zone can be independently programmed for Alarm Delay and
Confirmation, (Alarm Verification).
The dependencies supported, as per EN 54-2, paragraph 7.12 are type A or type B,
depending on the configuration of the TSA-1000.
3.4
Two Zones Coincidence
The detailed explanation of the operation of the ECD is provided in
Work States
, page
33, and in
Operation and Maintenance
, page 65.
Coincidence detection– EN 54-2 Section 7.12 option with requirements
is implemented in the TSA-1000 as a two zones coincidence and as a single/Dual zone
AVF- Alarm Verification Function).
AVF was explained above. "Two Zones Coincidence" is explained below
When the ECD is configured for two zones coincidence, then a trigger from one of the
zones which are members of the extinguishing decision group will change the state of
the ECD to "Fire Alarm", and to the "Preactivated State". Trigger from a second zone,
which is a member of the extinguishing decision group, will cause the CIE to enter the
"Activated" state. If a Non-Zero Delay is programmed, the CIE will enter the "Pre
Discharge Warning Time", (extinguishing delay). If Delay is zero, or the warning time
(delay) expires, the extinguisher is triggered.
i
Note
If zones, which are not members of the extinguishing decision group, are
triggered, the ECD changes state to "Fire Alarm", BUT DOES NOT start the
extinguishing process, and the extinguisher is NOT ACTIVATED even if two
such zones are triggered.
