If the <ALARM ACK> key is passcode protected, you cannot use this key to acknowledge alarms unless you have
the required access level. See Operator Access Levels (Section 9) and Log In Procedure (Section 1).
There are two types of acknowledges for the NDU: Global Acknowledge and Individual Acknowledge. Each
acknowledge type operates with the System Alarm Condition in the following manner.
l Global Acknowledge -
When Global Acknowledge is used, a single key press of the <ALARM ACK> key
acknowledges all alarm status changes in the system. If status change information is required, you may review
this data (after a 60 second delay) by pressing the <ALARM ACK> key and reading the total numbl2r of alarm
status changes on the alphanumeric display.
l Individual Acknowledge
(For NFPA 72-1990 Requirements) - If an alarm condition n’as been
acknowledged with the <ALARM ACK> key and further unacknowledged conditions remain in the system, the
tone-alert continues to sound and the next status change is shown on the alphanumeric display. This process
repeats until all changes are acknowledged. When this occurs, the tone-alert is silenced, and the highest
priority acknowledge change is indicated pn the display.
ALARM SILENCE KEY
CAUTION
THE ALARM SILENCE KEY PRESS WILL CAUSE FIRE ALARM EVACUATION SIGNALS TO TURN
---
QFJ. FOLLOW LOCAL PROCEDURES TO SILENCE ALARM EVACUATION SIGNALS.
When an alarm condition exists, various signals,, auxiliary relays, the city connection, and the tone-a.lert may
activate, depending on the system configuration and the stage of the alarm condition. The <ALARM SILEFJCE> key,
when pressed, turns OFF all circuits programmed to follow the Alarm Silence key. The <ALARM SILENCE> key
press will:
l
Turn OFF signal circuits
l
Display a message, such as the one shown below.
ALARM SILENCE IN PROGRESS...
Alarm Silence Software Considerations
The following software functions affect ALARM SILENCE operation.
l
If a
Coded Input Device
is activated, the <ALARM SILENCE> key press may be ignored until this function
has completed coding. Notification appliances cannot be silenced when a coded station iS in alarm, however,
the flashing LED will change from flashing ON to steady ON when the <ALARM ACK> key is pushed. The
notification appliances will be silenced automatically when coding is complete.
l
If the
Alarm Silence Inhibit Function
is activated but not completed, the <ALARM SILENCE> ke!y press is
ignored. The message, “ALARM SILENCE INHIBITED”, is displayed for a short time to indicate the action was
not taken. The message “ALARM SILENCE/SYSTEM RESET ALLOWED INHIBIT TIMER COMPLETE” is
displayed when the inhibit function times out. If selected, the alarm silence inhibit may be programmed from 1
to 99 minutes. When selected, signals cannot be silenced (and the system cannot be reset) until the
programmed time has elapsed.
l
If
Waterflow/Sprinkler Devices
are activated, notification appliances may or may not be silenced (depending
on local code requirements). Usually, a dedicated bell will continue to sound to indicate water flow.
l
Some visual notification appliances may continue to flash until the system is reset.
l
Speaker circuits remain ON until the system is reset, but the audio tone/message is silenced.
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