Burner control system

Claim 2

A control system for controlling a burner system that includes main and secondary fuel burner components, associated fuel and air flow control components and flame detector components, said control system having a plurality of field indicators that provide signals indicative of the condition of said burner system components, control logic responsive to said field indicators for providing burner control signals, logic bypass control, and circuitry responsive to said logic bypass control for establishing the status of said control logic as a function of said field indicators so that said control logic is maintained in synchronism with said field indicators.

Claim 3

The burner control system as claimed in claim 1 wherein said control logic includes a plurality of memories indicative of the status of supervised components of the burner system, and said logic bypass control samples said field indicators and updates said memories periodically.

Claim 4

The burner control system as claimed in claim 1 and further including means responsive to deactivation of said logic bypass control for checking synchronism of said control logic with said field indicators.

Claim 5

The burner control system as claimed in claim 1 wherein said logic bypass control responsive circuitry includes means for periodically sensing the condition of said field indicators and maintaining said control logic in synchronism with said field indicators.

Claim 6

The burner control system as claimed in claim 1 wherein said logic bypass control responsive circuitry includes means providing a trip condition signal and means including a delay to sense said trip condition signal providing means in response to a request for transfer from logic bypass mode to automatic mode.

Claim 7

The burner control system as claimed in claim 1 wherein said control logic is a sequential logic system that employs solid state static switching circuits, and input signals from said field indicators are introduced to said control logic through input interfaces, said control logic generating appropriate commands to control the associated field equipment through output interfaces in response to said input signals.

Claim 8

The burner control system as claimed in claim 6 wherein said logic bypass control includes means for periodically sensing the condition of said field indicators and maintaining said control logic in synchronism with said field indicators.

Claim 9

The burner control system is claimed in claim 7 wherein said logic bypass control includes trip coNdition indicator means and means including a delay to sense said trip condition indicator in response to a request for transfer from logic bypass mode to automatic mode.

Claim 10

A control system for controlling a burner system that includes main and secondary fuel burner components, associated fuel and air flow control components and flame detector components, said control system having a plurality of field indicators that provide signals indicative of the condition of said burner system components, control logic responsive to said field indicators for providing burner control signals, said control logic being a sequential logic system that employs solid state static switching circuits, and including input interfaces for introducing input signals from said field indicators to said control logic, and output interfaces for coupling commands generated by said control logic in response to said input signals to control the associated fuel and air flow control components, logic bypass control including means for periodically sensing the condition of said field indicators and maintaining said control logic in synchronism with said field indicators, means providing a trip condition signal, and means including a delay to sense said trip condition signal providing means in response to a request for transfer from logic bypass mode to logic control mode, and circuitry responsive to said logic bypass control for establishing the status of said control logic as a function of said field indicators so that said control logic is maintained in synchronism with said field indicators and means responsive to deactivation of said logic bypass control for checking synchronism of said control logic with said field indicators.

Claim 11

A control system for controlling a burner system that includes main and secondary fuel burner components, associated fuel and air flow control components and flame detector components, said control system having a plurality of field indicators that provide signals indicative of the condition of said burner system components, control logic responsive to said field indicators for providing burner control signals, said control logic being a sequential logic system that employs solid state static switching circuits, and including input interfaces for introducing input signals from said field indicators to said control logic, and output interfaces for coupling commands generated by said control logic in response to said input signals to control the associated fuel and air flow control components, logic bypass control including means for periodically sensing the condition of said field indicators and maintaining said control logic in synchronism with said field indicators, means providing a trip condition signal, and means including a delay to sense said trip condition signal providing means in response to a request for transfer from logic bypass mode to logic control mode, and circuitry responsive to said logic bypass control for establishing the status of said control logic as a function of said field indicators so that said control logic is maintained in synchronism with said field indicators and means responsive to deactivation of said logic bypass control for checking synchronism of said control logic with said field indicators.

Claim 12

The burner control system as claimed in claim 9 wherein said control logic includes digital logic responsive to said field indicators and memories responsive to said digital logic for storing signals indicative of the status of supervised components of the burner system, and said logic bypass control includes digital means for sampling said field indicators and updating said memories periodically.

Claim 13

The burner control system as claimed in claim 1 wherein said control logic includes digital logic responsive to said field indicators and memories responsive to said digital logic for storing signals indicative of the status of supervised components of the burner system, and said logic bypass control includes means for sampling said field indicator responsive digital logic and updating said memories periodically, means providing a trip condition signal and means including a delay for sensing said trip condition signal providing means in response to a request for transfer from logic bypass mode to logic control (automatic) mode.