System Operation
32 Autopulse-442R 50098:F 05/24/2001
In addition to the LED, a single-zone alarm will activate the Alarm Relay; the piezo and remote
Indicating Circuit #1 will start sounding. In alarm condition, the piezo will generate a steady tone.
The piezo can be silenced by pressing the trouble silence switch. If the fire is extinguished before a
second zone alarm is activated, return the system to normal standby condition by pressing the reset
switch inside the panel and holding it for three seconds.
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When the first alarm occurs, the panel will function as described in “Single Zone in Alarm (Cross-
Zone) Condition”. In alarm condition, the piezo will generate a steady tone.
Upon the occurrence of a second alarm, Indicating Circuit #1 will de-energize. The second alarm
LED will illuminate, and Indicating Circuit #2 will energize. At the same time, the predischarge
timer will be activated.
At the end of the predischarge timer cycle, the releasing circuit(s) will be energized to release the
fire suppressant agent.
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Manual discharge does not use the predischarge timer. If a manual station is used to initiate the
alarm condition, the following will take place:
• Indicating Circuit #2 and the piezo will be activated. In alarm condition, the piezo will
generate a steady tone.
• Alarm Relay will be activated.
• The releasing circuit(s) will activate.
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The power supply is designed to operate with a solid earth ground. Total power being provided to
the system’s power supply should not exceed the current draw during fully loaded panel operation.
Brownout circuitry annunciates degradation of the incoming AC voltage supply. A brownout
condition is annunciated when the AC power decreases. When the brownout threshold is reached,
the system reacts as if AC power is totally lost:
• Battery backup begins supplying power to operate the control panel
• General Trouble Relay contact transfers
• Green AC Power LED turns off
• Yellow System Trouble LED illuminates
• The piezo will sound one second on, one second off, and repeat until the Trouble is cleared.
When the AC voltage returns or increases above the brownout threshold, the green AC Power LED
will illuminate. The power supply circuitry will return to primary power functions and begin to
recharge the backup battery supply.
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