8
1.0
Introduction
Secutron’s MR-2320 Series Pre-Action/Deluge and Agent Release Control Panel performs the
function of fire suppression in a wide variety of applications. It is capable of being used in an
agent release sprinkler system or in a pre-action or deluge sprinkler system. It can be used in
single-hazard or dual-hazard applications with or without cross-zoning. The panel includes
common alarm, supervisory, and trouble relays, and provides regulated and unregulated
auxiliary power along with four-wire smoke power. It supports auxiliary relays and a city tie
module. The auxiliary relays are based on a hazard area status. The Secutron’s MR-2320 has
six input zones and four output zones, allowing for flexibility in most single and dual-hazard
applications for both deluge and agent releasing applications.
1.1
Panel Type
The panel can function as an agent release panel or as a pre-action/deluge panel, depending
on which of the available fixed configurations are chosen from the main programming menu.
1.1.1
Deluge sprinkler system
In deluge sprinkler system open-valve sprinkler heads terminate to a water supply that is
controlled by a single valve. When the system detects fire, it automatically opens the valve via
a releasing circuit, allowing the water to flow through all the sprinkler heads. Deluge sprinkler
systems are useful for applications in which simultaneous discharge of water through every
sprinkler is required.
1.1.2
Pre-action sprinkler system
In a pre-action sprinkler system close-valve sprinkler heads are connected to pipes that are
supervised for air pressure. The pipes terminate directly to a water supply. Pre-action systems
are useful for applications in which the prevention of an accidental discharge of water is
required.
1.1.3
Agent release system
In an agent release system, an extinguishing agent (such as Argon, dry chemical, CO
2
, Halon,
etc.) is automatically released upon fire detection. An abort function is added to prevent the
false release of the extinguishing agent.
1.2
Overall Features
•
Basic unit has six Class B (Style B) initiating circuits, which may be configured as Class
A (Style D) using input Class A converter adder modules. Each initiating circuit is pre-
configured as Alarm, Supervisory (Latching or non-latching), water-flow, Manual
Release Switch, or Abort Switch. There are two LEDs per circuit, one for Trouble
(amber), and one dual color (amber/red) LED for Supervisory (amber) and Alarm (red).
•
Basic unit has 4 power limited class B (style Y) output circuits. Output circuits 1 & 2 are
indicating circuits while output circuits 3 & 4 are releasing circuits (circuit 4 can work as
an indicating circuit in some situations; check Pre-Programmed Modes on page 58 for
details). Each indicating circuit process type is pre-configured and can be silenceable.
The signal rates depend on the selected pre-programmed configuration.
•
A pushbutton associated with each initiating, indicating and releasing circuit can
individually bypass the circuit.
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