A combustion air proving (CAP) system for a burner assembly having a burner for providing heated air to a location, a controller, and a back plate, where outside air is fed to the burner via a conduit. The CAP system is connected to an inlet of the system. An outlet of the system is connected to the burner via the back plate. A damper within the system is translatable between open and closed positions for allowing and blocking air flow, respectively. A sensor measures an air flow parameter of air flow to the burner. The sensor communicates with the controller, which shuts down the burner if the parameter measured by the sensor meets a predetermined threshold value. An assembly installer may test for proper sensor and controller functions by translating the damper to the closed position and blocking outside air flow.

A combustion air proving (CAP) system for a burner assembly having a burner for providing heated air to a location, a controller, and a back plate, where outside air is fed to the burner via a conduit. The CAP system is connected to an inlet of the system. An outlet of the system is connected to the burner via the back plate. A damper within the system is translatable between open and closed positions for allowing and blocking air flow, respectively. A sensor measures an air flow parameter of air flow to the burner. The sensor communicates with the controller, which shuts down the burner if the parameter measured by the sensor meets a predetermined threshold value. An assembly installer may test for proper sensor and controller functions by translating the damper to the closed position and blocking outside air flow.

A liquid fuel air heater comprises a housing defining a motor housing portion and a grip portion extending from the motor housing portion. An electric motor is positioned in the motor housing portion. A combustion chamber is at least partially positioned within the motor housing portion. A fan is driven by the motor when activated for generating an axial airflow through the combustion chamber. A battery pack containing a plurality of battery cells connected to each other in a series or parallel arrangement is removably coupled to the grip portion of the housing for supplying power to the motor.

A combustion system includes an electrically actuated flame location control mechanism.

A controller for use in a gas appliance system includes a circuit board, a plurality of connectors and a processor mounted on the circuit board. The processor controls operation of the gas appliance using, in part, at least one connector of the plurality of connectors and control settings for an intermittent pilot (IP) system in response to a user selection to configure the controller to control an IP system, and controls operation of the gas appliance using, in part, at least one connector of the plurality of connectors and control settings for a direct spark ignition (DSI) system in response to a user selection to configure the controller to control a DSI system.

A combustion system includes an electrically actuated flame location control mechanism.

A chemical plant may include one or more fired heaters for heating of process streams. A fired heater may include a direct-fired heat exchanger that uses the hot gases of combustion to raise the temperature of a process fluid feed flowing through tubes positioned within the heater. Fired heaters may deliver feed at a predetermined temperature to the next stage of the reaction process or perform reactions such as thermal cracking. Systems and methods are disclosed to optimize the performance of fired heaters or reduce energy consumption of fired heaters.

A combustion system includes an electrically actuated flame location control mechanism.

A controller for use in a gas appliance system includes a circuit board, a plurality of connectors and a processor mounted on the circuit board. The processor controls operation of the gas appliance using, in part, at least one connector of the plurality of connectors and control settings for an intermittent pilot (IP) system in response to a user selection to configure the controller to control an IP system, and controls operation of the gas appliance using, in part, at least one connector of the plurality of connectors and control settings for a direct spark ignition (DSI) system in response to a user selection to configure the controller to control a DSI system.

Method for operating a gas burner appliance (10), by providing during an actual burner-on-phase of the gas burner appliance (10) in request to an actual nominal heat demand a flow of a gas/air mixture (M) to a burner chamber (11), the gas/air mixture (M) having a defined mixing ratio of gas (G) and air (A), wherein said gas/air mixture (M) is provided by a mixing device (25) mixing an air flow with a gas flow, wherein the air flow or the flow of the gas/air mixture is provided by a fan (14) in such a way that a fan speed of the fan (14) depends on the actual nominal heat demand, wherein the fan speed range of the fan (14) defines a modulation range of the gas burner appliance (10), wherein said defined mixing ratio of gas (G) and air (A) of the gas/air mixture (M) is controlled by a controller (26) using as input a signal provided by a sensor (13) and providing as output a control variable for an electric or electronic gas flow modulator (18) in order to keep the mixing ratio of gas (G) and air (A) at the defined mixing ratio over the modulation range of the gas burner appliance (10). If the actual nominal heat demand of the gas burner appliance (10) is no longer present the following steps are automatically executed in order to set-up the gas burner appliance (10) for an upcoming burner start: Decrease during the actual burner-on-phase the fan speed of the fan (14) to a defined fan speed while keeping the mixing ratio of gas (G) and air (A) of the gas/air mixture (M) at the de-fined mixing ratio thereby decreasing the opening position of the gas flow modulator (18). Keep the gas flow modulator (18) at said decreased opening position and terminate the actual burner-on-phase of the gas burner appliance (10).