Appendix A: Special Zone Operation
Presignal and Positive Alarm Sequence (PAS) Operation
64
NFS-640 Operations Manual P/N 51334:B 10/03/2003
If the Presignal Delay Timer reaches its programmed value, without operator intervention, the control
panel activates all outputs programmed to F0.
How to Respond to an Alarm with a Presignal Delay Timer (PAS selected)
If an alarm occurs with a Presignal Delay Timer (60-180 seconds) and PAS selected, the control panel
displays an Alarm screen that shows the type of device and the SLC address of the device causing the
alarm. When an alarm comes from an initiating device with a CBE list that includes F0 (with PAS
selected), the control panel delays the following outputs:
•
System Alarm relay
•
TM-4 Polarity Reversal Alarm output
•
TM-4 Municipal Box output
Note:
These outputs do not delay for Presignal operations without PAS selected.
If a second alarm occurs during the Presignal Delay Timer, the control panel aborts the Presignal Delay
Timer and activates all programmed outputs.
A sample Alarm screen for a monitor module:
Figure 51 Sample Alarm Display Screen
The
FIRE
ALARM
LED flashes and the panel sounder pulses a steady tone. The control panel latches until
the alarm is corrected and you press the S
YSTEM
R
ESET
key to reset the control panel. You have
15 seconds to acknowledge the alarm or the control panel automatically activates all outputs
programmed to F0. If you acknowledge the alarm within 15 seconds, the control panel increases the
delay time to the full Presignal Delay Timer (60-180 seconds). You have the duration of the Presignal
Delay Timer to respond to the alarm before the control panel activates all outputs programmed to F0.
You can take the following actions:
•
To increase the delay to the full programmed Presignal Delay Timer, press the
ACKNOWLEDGE
/
SCROLL
DISPLAY
key. The panel sounder goes silent and the
FIRE
ALARM
LED changes from
flashing to steady.
•
To abort the Presignal Delay Timer, turn off the panel sounder and all silenceable output
circuits and light the
SIGNALS
SILENCED
LED, press the
SIGNAL
SILENCE
key.
•
To manually activate all outputs programmed to F0, press the
DRILL
key. The Manual Evacuate
screen appears, the panel sounder pulses and the
FIRE
ALARM
LED changes from flashing to
steady. The Manual Evacuate screen and Alarm screen display alternately at 3-second
intervals.
If the Presignal Delay Timer reaches its programmed value, without operator intervention, the control
panel activates all outputs programmed to F0.
Status banner ALARM
Type Code
MONITOR
SLC address of the
activated initiating device
ALARM: MONITOR
MODULE ADDR 1M147
Z004
10:14A 071401 1M147
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