Specifications

MR-2320 Series Installation and Operation Manual

General Panel Operation

• Activation of Manual Release Switch starts the Manual Release Delay Timer. The expiration of Manual-release

Delay Timer (MDT) activates the releasing circuits consequently. Manual Release Switch overrides the Abort

Switch always and Manual-release Timer (MDT) always overrides Release Timer (RT).

• When the manual release switch is active and the panel is in the Hazard Alarm (pre-discharge) state, Abort

Switch cannot override the Manual Release Switch. Only the System Reset key can interrupt and reset the

panel and hazard area.

• System Reset will reset all circuits, including releasing circuits.

• The supervisory circuit can be optionally indicated on NAC-2 circuit. The NAC code of supervisory circuit should

be different from those of Hazard Alert or Hazard Alarm. By default, when the NAC code for Hazard Alert is

Temporal, the NAC code for supervisory circuit is 20 BPM or verse visa. This configuration change is

automatically done by the panel. If NAC code for alert is chosen other than 20 BPM and Temporal, Supervisory

NAC code will remain unchanged during the configuration.

• In some pre-programmed modes, the Alert Rate and the Alarm Rate are configured the same. So the action of

Abort Switch does not change the NAC rate.

• AB/MR is the combination of Manual Release Switch and Abort Switch in the Agent Release panel. Short

condition means Manual Release active. Current Limit means Abort Switch active.

• To avoid the conflict of different NAC code on the same circuit, the priority of signals are defined as, Water-flow

alarm has the highest priority, then hazard cadence. The supervisory signal has the lowest priority.

• Soak Timer sets the time period how long the releasing circuits should be active. Upon the expiration of soak

timer, the releasing circuits will be shut off. Setting of 0 second means the releasing circuits will be turned on

without timer running. They will be shut off upon system reset.

• Abort function is not applicable in pre-action and deluge application.