NFW-50X Manual —
P/N LS10129-001NF-E:C 7/25/2018
109
Special System Timers
Operating Instructions
4.21 Special System Timers
4.21.1 Silence Inhibit Timer
This option, if selected, prevents the
Alarm Silence
key from functioning for 5 minutes following an alarm. A new alarm during the ini-
tial 5 minute period will not cause the timer to restart with a new 5 minutes.
Silence Inhibit operation requires the approval of the local
Authority Having Jurisdiction.
4.21.2 Autosilence Timer
If Autosilence is selected, the notification appliances, programmed as silenceable, will automatically be silenced after a programmable
duration of 5 to 30 minutes. Pressing the
Drill
key will restart the timer.
Autosilence operation requires the approval of the local Author-
ity Having Jurisdiction.
4.21.3 Trouble Reminder
If selected, this feature causes a reminding ‘beep’ every 15 seconds during an alarm (after the
Alarm Silence
key is pressed) and every
two minutes during a trouble condition (after the
Acknowledge/Step
or
Alarm Silence
key is pressed). The ‘beeps’ from the onboard
piezo sounder will occur until the alarm or fault is cleared.
Note that if the trouble is not cleared within 24 hours, the piezo will resound, indicating that the trouble condition still exists.
4.21.4 Waterflow Retard Timer
If selected, this option will delay the activation of a waterflow type alarm for a programmable time duration from 1 to 90 seconds. This
delay is in addition to any time delay inherent in the waterflow device.
This feature requires the approval of the local Authority Having
Jurisdiction.
4.21.5 Alarm Verification (None or One Minute)
If alarm verification is selected, an addressable smoke detector's alarm is ignored for a retard time of 13 seconds and the detector's alarm
condition is automatically reset. There will be no alarm indication at the FACP during the Retard period. A confirmation period of 60
seconds follows, during which a subsequent alarm from the same detector will cause the panel to immediately activate the appropriate
outputs and indicate the alarm condition at the FACP. If a different detector alarms any time during the first detector's verification period,
the panel will immediately activate all appropriate outputs and indicate the alarm condition at the FACP. If no additional detector alarms
occur within 73 seconds of the first alarm (13 second retard plus 60 second confirmation), the timer resets and the panel is ready to verify
any new detector alarms which may occur. The following is a graphic representation of Alarm Verification.
4.21.6 Control Module Delay Timer
The control module delay feature, if enabled, will delay activation of a control module after a programmed time of 1-180 seconds after
being triggered by an alarm condition.
This feature requires the approval of the local Authority Having Jurisdiction.
Refer to the table on
page 46 for permissible settings.
4.22 Walktest
Walktest is a feature which allows one person to test the fire alarm system. An audible walktest will momentarily sound the Notification
Appliance Circuits in the building and store the walktest information in a file at the panel. A silent walktest will not sound the NACs but
will store the walktest information in a file which can be viewed at the panel. Disabled NAC devices will not activate during walktest.
73 sec.
13 sec.
0 sec.
CONFIRMATION (60 seconds)
RETARD
Alarm Ignored
Control Panel Processes Alarm if Same Detector is Still in Alarm
Control Panel Immediately Processes Alarm
Detector Alarm Verification
( Confirmation)
Detector Goes Into Alarm
Different Detector Alarms
During First Detector's
Verification Period
NOTE:
Alarm Verification is available only for addressable smoke detectors, not conventional smoke detectors.
