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MAIN PROCESSING CARDS

Releasing Device Service

The PRO-2000 Series panel can act as a releasing unit for zones where different extinguishing agents are used. A

typical releasing set-up consists of heat or smoke detectors, a pull station, an Abort station, a set of extinguishant

cylinders and audible/visual signaling devices. The panel will be programmed to meet the necessary requirements

for each zone.

For Releasing Device Service, the ADI card (using the Monitor Modules/Control Modules or Supervised OUTPUT

Relays), or SI Card (Supervised Input Card), SO Card (Supervised OUTPUT Card) may be used.

The PRO-2000 Series panel may use cross-zone initiating function. The panel must be factory configured to use the

cross zoning. If it is the case, more that one dedicated initiating device must operate prior to initiate release

sequence. The operation of a single initiating device will trigger all other intended alarm signals.

Release Sequence

The PRO-2000 Series initiates the release sequence when:

• The designated inputs 1 detectors are in alarm, or

• The designated manual release station is activated.

The following pre-programmed sequence occurs:

1. The pre-release audible/visual signal is continuously energized.

2. Start the 60 second* 'pre-release' delay.

3. Once the pre-release delay terminates and if the Abort push button is not pressed the release annunciators and

release actuators are activated.

4. The release actuators may be deactivated after a per-programmed delay.

* This is the maximum allowable delay time. Delays can be pre-programmed to this maximum.

"Abort" Push buttons

The Abort push button will be operational for releases initiated either from detectors or from manual release

actuation. Therefore, the manual release will not override the abort switch. The Abort push button may be

pressed to temporarily delay the release of the extinguishing agent. In order to delay the release, the Abort push

button must be pressed and held. The release actuators will not be energized until the push button is released, even

if the 'pre-release' delay expires.

If the Abort push button is pressed outside a release sequence, only a status change will be annunciated at the

Control Unit.

Cross zoning is only applicable to the releasing function on the fire control unit. For local alarm

notification, cross zoning in not used.

Mircom PRO-2000 Series User Manual

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