Gas flow controller for use in gas fired apparatus

A gas flow controller for use in a gas fired apparatus including a pilot burner and a main burner, the controller comprising:

• an actuator;
• a pilot valve operable to open and close a first fluid flow path between a gas inlet and the pilot burner upon actuation of the actuator;
• a main burner valve operable to open and close a second fluid flow path between the gas inlet and the main burner;
• and
• a flow controller valve operable to open and close a third fluid flow path between the gas inlet and a back side of the main burner valve upon actuation of the actuator.

A gas flow controller for use in a gas fired apparatus including a pilot burner and a main burner, the controller comprising:

• a pilot valve operable to open and close a first fluid flow path between a gas inlet and the pilot burner;
• a main burner valve operable to open and close a second fluid flow path between the gas inlet and the main burner, the main burner valve separating a first fluid chamber in fluid communication with a front side of the main burner valve from a second fluid chamber in fluid communication with the back side of the main burner valve, the first fluid chamber fluidly connected to the second fluid chamber by a third fluid flow path including at least one pressure regulating orifice;
• a flow controller valve operable to open and close a fourth fluid flow path between the gas inlet and the second fluid chamber to maintain the main burner valve in a closed position when the pilot valve is in an open position;
• a manual actuator connected to the pilot valve and the flow controller valve, the manual actuator configured to open both the pilot valve and the flow controller valve when manually actuated from a first position to a second position;
• a latch configured to maintain the pilot valve in the open position when the manual actuator is in the first position;
• and
• a pressure control valve configured to open and close the main burner valve by regulating a pressure differential across the front side and the back side of the main burner valve.