Importance

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Abstract

A control system for use with a boiler and associated burner. In one embodiment, the system comprises a first control circuit for producing a signal having alternating first and second states, the first state activating the burner and having a first predetermined duration, the second state deactivating the burner and having a second predetermined duration that defines a time period that allows foam and surging fluid in the boiler to settle, and a relay responsive to the first control circuit signal and adapted for connection to a power source and the burner, when the first control circuit signal has the first state, the relay connects the power source to the burner to activate the burner, when the first control circuit signal has the second state, the relay disconnects the power source from the burner to deactivate the burner. In another embodiment, the system further includes a sensor for continually monitoring the fluid level in the boiler, the sensor producing a signal having a first state indicating that the fluid level in the boiler is at or above a predetermined level and a second state indicating that the fluid level in the boiler is below the predetermined level, and a second control circuit responsive to the sensor signal and having an output coupled to the relay, the second control circuit producing a signal having a first state in response to the first state of the sensor signal and a second state in response to the second state of the sensor signal, the relay connecting the power source to the burner when the first and second control circuit signals have the first state and disconnecting the power source from the burner to deactivate the burner when the first control circuit signal or the second control circuit signal has the second state.

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First Claim