Panel Operation; Operating Sequences; General Zone Fire Alarms; Waterflow Alarms - Secutron MR-2602 Installation Manual

MR-2602 Installation & Operator's Manual

5.0 Panel Operation

5.1 Operating Sequences

This section describes how the panel functions under various conditions. The choices you make in panel
programming will also affect how the panel operates. Please see "6.0 Programming the MR-2602 System" on
page 22 for information on how to program the panel, and descriptions of each of the programming options.

5.2 General Zone Fire Alarms

Zone alarms have priority over all other annunciation. When an alarm occurs, the following happens:
•The corresponding zone alarm LED begins flashing, the common alarm LED turns on steady, and the alarm
relay turns on.
•If a trouble was present on that zone then the zone trouble LED turns off. If the trouble buzzer is audible
then it also turns off.
•The NACs sound in a steady or temporal pattern, depending on the option selected (see "NAC Temporal/
Steady Programming - Section 1 ('NAC1' LED on steady)" on page 25).
•If enabled, the silence inhibit timer begins counting down (see "Signal Silence Inhibit Timer" on page 26). If
the silence inhibit timer is enabled, the panel cannot be silenced for 60 seconds following the first fire alarm.
Subsequent fire alarms do not restart or extend this timer. While the signal silence inhibit timer is counting
down, if the Silence Alarm button is pressed the panel will sound a 1 second 'error tone' on the common
trouble buzzer.
•The NACs remain on until silenced with the Silence Alarm button, or if the automatic alarm silence is
enabled, until the thirty minute bell timer runs out (see "Automatic Signal Silence" on page 25). If the
automatic silence timer is enabled, the panel will automatically silence the NACs 30 minutes after the last
fire alarm. Each zone alarm will restart the timer, giving a full 30 minutes after the last alarm before the NACs
are silenced.
• Once the NACs are silenced the signals silenced LED turns on and any flashing zone alarm LEDs turn on
steady. The common trouble LED and trouble relay also turn on and, if the NACs have been silenced
automatically, the buzzer will sound at a rate of ½ second ON/OFF.
A manual signal silence will not initiate the trouble buzzer. Only the common trouble LED and
Note:
signals silenced LED are turned on.
•Any additional zone alarms that occur while the panel is in alarm will reset the auto alarm silence timer and
turn on the NACs, but the panel will not restart the 60 second silence inhibit timer.
•The zone alarm LEDs, common alarm LED and alarm relay will remain on steady until a system reset is
performed.

5.3 Waterflow Alarms

If the Waterflow Silence option is turned off (see "Silence Waterflow Alarms" on page 26), when a waterflow
zone (type 03) initiates an alarm the NACs cannot be silenced until all waterflow zones are returned to normal.
If all waterflow zones return to normal after the 30 minute automatic signal silence timer has expired, then the
panel will silence the NACs.
If the Waterflow Silence option is turned on, then an alarm on a waterflow zone is treated like any other fire
alarm.
Waterflow alarms may be delayed by 60 seconds to prevent false alarms from surges in the sprinkler system.
The delay is common to all zones programmed as 'waterflow', type 03 zones. If the delay is not used, all
waterflow alarms will be instant.
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