Guardian Model G300-A Owner's / Installation Manual
Page 5
CENTRAL PROCESSING UNIT (CPU) CONTROL BOARD
The CPU control board is housed I attached inside the system enclosure. A 9V DC battery powers the control board's circuitry.
FIGURE3
SUPERVISED CIRCUITRY:
The supervised circuitry is designed with a continuous beeping alarm to give an indication of defective electronics or loose terminal sensors.
SYSTEM OPERATION LIGHT:
The red "power" light will blink approximately every 45 seconds to confirm the system is operating.
AUDIBLE ALARM:
The system alarm is designed to sound once a stovetop fire has activated the system. The system operation light (red LED) will blink once every second during system activation. In addition the alarm will sound continuously until the reset button is manually pushed, then the system operation light will again blink approximately every 45 seconds.
REMOTE ALARM CONNECTION:
This connection is provided where an optional remote alarm is required.
AC/DC
Adaptor A connection is provided for an optional AC/DC wall adaptor for continuous AC power supply with battery backup. The wall transformer is a recognized component with a maximum input rating of 12OVAC 60 Hz 4.85 w 300 M.A. with an output rating of 9VDC. FIGURE 3A
FIGURE 3A
LOW BATTERY WARNING:
The audible alarm on the CPU control board will "chirp" approximately every 45 seconds when a low battery condition exists. If this condition exists, 9V DC battery must be replaced immediately to insure proper system operation. If the "chirp" continues there is possible trouble in the electronic supervised circuitry in which case an authorized Twenty First Century service center should be contacted.
AUXILIARY OUTPUTS:
The CPU can be connected to automatic telephone dialers, monitored security alarm systems or other warning / protective equipment. The auxiliary outputs provide a (1) second impulse every ten (10) seconds via a set of dry contacts rated at 5 AMP 24 VAC. In order to interface with the above items, a latching relay may be required.
NO ADJUSTMENTS REQUIRED:
The CPU control board's sensitivity/operating levels are preset and factory tested for optimum performance.
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