SECTION 1
Figure 1 - 4002 Fire Alarm System
SYSTEM OPERATION DESCRIPTION
The 4002 is a battery-backed, U.L. listed, power-limited, electrically-supervised fire alarm system that, depending
on its size, can operate up to six notification appliance (signal) circuits and monitor up to 32 zones of initiating
device circuits. In addition, a 4002 can automatically control equipment such as fire doors, smoke dampers, fans
and elevators during a fire condition.
The 4002 provides audible and visual indications during trouble or alarm (fire) conditions. Should either of the
above occur, the system sounds the applicable notification device(s) and flashes the applicable LED (one of the
yellow LEDs for trouble, one of the red LEDs for alarm). The indications continue until someone appropriately
acknowledges the condition (presses the TROUBLE SILENCE or the ALARM SILENCE push button).
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Acknowledging the condition silences the notification device(s), causes the flashing LED to illuminate steadily
and, in the case of an alarm, illuminates the ALARM SILENCED LED.
Note 1: If, following a trouble or alarm acknowledgement, another circuit or zone goes into trouble or alarm, the
applicable LED flashes and, in the
case
of an alarm, the alarm notification device(s) resound.
Note 2: Once in alarm, the system remains in alarm until (1) the device that initiated the alarm is restored to
normal and (2) the panel is reset.
The user interface with the system consists of controls and indicators which are mounted in the control panel. The
purposes of these controls and indicators are as follows, and are shown on Figure 2.
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