Patent ID: 7568909
Filing Date: 2009-08-04
Classification: F23N

Abstract:
1. A burner control system for ensuring continuous operation of a remote heater having a gas supply and no access to a utility electrical supply comprising: a main burner and a pilot burner in the remote heater; an igniter for igniting the pilot burner; a flame ionization detector for sensing at least a pilot flame at the pilot burner; a pilot latching valve for controlling gas flow from the gas supply to the pilot burner, the pilot latching valve being operable between an open state wherein gas is supplied to the pilot burner and a closed state in which the flow of gas to the pilot burner is stopped; a main latching valve for controlling a main gas valve, the main latching valve being operable between an open state in which the main gas valve is caused to be opened wherein gas is supplied to the main burner and a closed state in which the main gas valve is caused to be closed in which the flow of gas to the main burner is stopped; a control circuit having a microcomputer for controlling the pilot and main latching valves between their open and closed states, for interrogating the flame ionization detector, and for operating the igniter; a battery; a microcontroller timer powered by the battery; and a switch, closed by the microcontroller timer at timed intervals for momentarily powering the control circuit from the battery, the microcomputer interrogating the flame ionization detector for detecting the at least the pilot flame, wherein