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Diagram times and functions
Time 1
1st Alarm condition
The first zone/detector detects an alarm
Time 2
2nd Alarm condition
•
The conditions for a fire alarm (2ZD = Zone 1 + Zone 2) are fulfilled.
•
The first spray cycle starts when the spray time (SZ) begins.
Time 3
End of the spray time and start of the break for the first locked cycle
Time 4
End of the break for a locked cycle
If the number of locked cycles is greater than zero (in this example 2), the next cycle begins
at the start of the next spray time.
Time 5
End of the spray time and start of the break for a subsequent locked cycle
Time 6
End of the break for a locked cycle
End of the active spray time
The last locked cycle (in this example 2 locked cycles) has expired.
Requested cycles can now be executed.
Time 7
A requested cycle is started because 2-zone coincidence (2ZD) is fulfilled again at this
point in time.
Start of a new spray time
Time 8
End of the spray time and start of the break for a requested cycle
Time 9
End of the break for a requested cycle
At this point in time no further 2-zone coincidence (2ZD) is active.
No further cycle is requested at this time.
Time 10
2-zone coincidence (2ZD) is fulfilled once more and thus requests a new spray cycle.
Start of spray time.
Time 11
End of the spray time and start of the break for a requested cycle
Time 12
End of the break for a requested cycle.
As no 2-zone coincidence (2ZD) is fulfilled, no further cycle is executed.
Time 13
Reset the extinguishing system
The existing fire alarm is reset. The extinguishing system is switched back to inactive/original
status.
FB 798352 / 11.07
Extinguishing Control Computer 8010 - Series 2
fire (Zone 1)
Fire (Zone 2) / 2-zone coincidence (2ZD) is fulfilled
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