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Release Stages
4.12 Release Stages
Outputs programmed as Release Stage NACs indicate the three stages of a release operation:
activation of an input zone programmed to activate an output Releasing Circuit will start a
Pre-discharge delay timer and cause the programmed indicating NAC output to pulse at a
60 pulse-per-minute rate
the Pre-discharge delay timer reaching zero or a manual release input activating causes the
output programmed as a Releasing Circuit to perform a release and the programmed
indicating NAC output to turn on steady
upon completion of the release, the programmed indicating NAC output will pulse at a 20
pulse-per-minute rate
4.13 Special System Timers
4.13.1 Silence Inhibit Timer
This option, if selected, prevents the Alarm Silence key from functioning for 60 seconds following
an alarm. A new alarm during the initial 60 second period will not cause the timer to restart with a
new 60 seconds. Silence Inhibit operation requires the approval of the local AHJ.
4.13.2 Autosilence Timer
If Autosilence is selected, the notification appliances, programmed as silenceable, will
automatically be silenced after a programmable duration of from 5 to 30 minutes. Pressing the
Drill key will restart the timer. Autosilence operation requires the approval of the local AHJ.
4.13.3 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 Trouble Reminder feature is not selected and the trouble is not cleared within 24 hours,
the piezo will resound, indicating that the trouble condition still exists.
4.13.4 Pre-Discharge Delay Timer
The Pre-Discharge Delay Timer can be set to a value between 00 and 60 seconds. Upon activation
of an alarm, the agent release will be delayed by the amount of time programmed into the Pre-
Discharge Delay Timer.
4.13.5 Discharge Timer
The Discharge Timer can be set to Always On or a value of between 01 and 20 minutes. Following
activation of a releasing circuit, the agent will continue to release either continuously until the panel
is reset (Always On) or until the Discharge Timer counts down to 0.
4.13.6 Waterflow Delay 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 AHJ.
MRP-2002 & MRP-2002E PN 53049:A1 5/01/2008
Operating Instructions
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