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<br />TURN ON PROPANE SUBR.OUTINE <br /> <br />ENERGIZE VALVE OPEN (Cl HIGH) <br />WAIT 1 SEC <br />DE-ENERGIZE VALVE OPEN (Cl LOW) <br />SET PROPANE VALVE (FLAG 3 HIGH) <br />RESET HOUR COUNT <br /> <br />TURN OFF PROPANE SUBROUTINE <br /> <br />ENERGIZE VALVE CLOSE (C2 HIGH) <br />WAIT 1 SEC <br />DE-ENERGIZE VALVE CLOSE (C2 LOW) <br />RESET PROPANE VALVE (FLAG 3 LOW) <br />RESET HOUR COUNT <br />RESET SHUTOFF COUNT <br /> <br />VALCHK SUBROUTINE (CHECK FOR PROPANE FLOW AND NOZZLE TEMP.) <br /> <br />IF NOZZLE TEMP < -70 DEG. F <br />IF FLOW IS > .5 GPH <br />CALL TURN OFF PROPANE <br /> <br />END <br /> <br />END <br /> <br />MALCHX SUBROUTINE (CHECK FOR PROPANE FLOW AND NOZZLE TEMP.) <br /> <br />IF MALFUNCTION (FLAG 4 IS HIGH) <br />ADD 1 TO MALFUNCTION COUNT <br />RESET MALFUNCTION (SET FLAG 4 LOW) <br /> <br />END <br /> <br />IF NOZZLE TEMP > -70 DEG. F <br />SET MALFUNCTION (FLAG 4 HIGH) <br /> <br />END <br /> <br />IF FLOW IS < .5 GPH <br />SET MALFUNCTION (FLAG 4 HIGH) <br /> <br />END <br /> <br />IF MALFUNCTION <br />CALL TURN OFF PROPANE <br /> <br />END <br /> <br />B-5 <br />