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No G310A-A
AUGUST 1, 2000

Guardian Model G300-A
Owner's / Installation Manual

Page 9


GAS SHUTOFF

The sonic gas shutoff unit continuously monitors for an alarm from the CPU board located in the system enclosure. The alarm sounds to activate the sonic gas shutoff unit.

The sonic gas shutoff unit is powered with a 9-volt DC battery. Internal circuitry monitors the condition of the battery and will cause the alarm to 'chirp' approximately every 90 seconds when a low battery condition exists. Battery shall be replaced annually or when a low battery condition exists.

INSTALLATION OF GAS STOVE
SONIC ACTIVATED SHUTOFF

NOTE: Insure gas stove sonic activated shutoff is installed within the same room as the central processing unit control board (Part #G302) for proper unit operation.

It is suggested that a certified plumber familiar with local and state codes install this unit on the incoming service line to the stove.

Normally, the connection is made between the manual line shutoff and the flexible service line from the stove (See FIGURE 13).

NOTE: The gas valve has an "in" and "out" orientation to ensure that the valve is installed correctly.

FIGURE 13

NON-SONIC VERSION
Description:

Typical interface connections for the gas sonic shutoff are illustrated. In some cases a non-sonic version of the shutoff device may be required. If this is the case, the audible alarm is not required to shut off the stove even though it is still provided. This is accomplished by the main CPU board switching the auxiliary output. The "COM and "N/O" contacts complete the circuit, which activates both the electric or gas shutoff. See below for direct wiring interface.


 



FIGURE 14

CAUTION:  PREMATURE ACTIVATION OF THE ELECTRIC AND GAS STOVE SONIC SHUTOFF UNITS CAN OCCUR, ONCE INSTALLED, IF YOUR RESIDENTIAL SMOKE OR CARBON MONOXIDE DETECTORS INADVERTENTLY ACTIVATE. BE SURE TO RESET THE ELECTRIC OR GAS STOVE SHUTOFF UNIT.

RESET VALVE

Once activated, the gas valve remains in the closed position. In the event the valve is closed, it must be manually reset by depressing the reset button located on the bottom of the valve.


FIGURE 15

 


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