IMPORTANT DEFINITIONS
Alarm-Initiating Device: A device which, when actuated, initiates an alarm. Such devices, depending on their type,
can be operated manually or actuated automatically in response to smoke, flame, heat or water-flow. (Examples: pull
stations, heat detectors, smoke detectors, sprinkler flow switches, etc.)
Alarm-Notification Appliance: A device that produces an audible and/or visual alarm signal in response to a fire
emergency. (Examples: horns, bells, chimes, flashing lights, etc.)
Annunciator: An electrically operated visual signaling device having one or more lamps or LEDS to display the
status of the fire alarm system.
End-of-Line Device: A device used to terminate a supervised circuit.
Initiating-Device Circuit: A circuit to which automatic or manual initiating devices are connected.
Local Energy Master Box: A municipal master box that uses electrical energy from the protected premises to
energize its electromagnetic tripping mechanism. See definition for shunt master box.
Notification-Appliance Circuit: A circuit to which notification appliances are connected.
Shunt Master Box: A municipal master box that uses electrical energy from the municipal fire alarm system to
energize its electromagnetic tripping mechanism. See definition for local energy master box.
Zone: A designated area of a building. Commonly, zones within a building are annunciated to aid in locating a fire.
SYSTEM INTRODUCTION
The 4001-9403 and -9404 are four-zone, electrically supervised, fire alarm panels.
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The 4007-9403 connects to a 12OVAC 60 Hz source.
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The 4007-9404 connects to a 220/24OVAC, 50 Hz source.
Each system contains one notification appliance circuit, battery standby power, and battery charger.
The systems provide an early warning evacuation signal for building occupants if a fire occurs. The systems consist
of:
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Alarm-initiating devices - Smoke detectors, heat detectors, pull stations, etc.
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Alarm-notification appliances - Horns, bells, and visual units.
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A control panel.
Each system may also contain optional features.
Since the -9403 and -9404 operate the same except for input power, we will discuss system operation as it applies
to the -9403.
Alarm-initiating devices are installed in the building and connected to one of four initiating-device circuits on the
control panel. Each initiating-device circuit is given a zone number (1, 2, 3, or 4). Thus, the various areas of the
building can be designated as zone 1, zone 2, zone 3, or zone 4. The control panel monitors each zone for troubles
and alarms.
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