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Integrated furnace control having ignition switch diagnostics

  • US 4,955,806 A
  • Filed: 05/09/1989
  • Issued: 09/11/1990
  • Est. Priority Date: 09/10/1987
  • Status: Expired due to Fees
First Claim
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1. An integrated digital electronics burner control for a gas burner of the type having at least one gas valve control relay operable upon command from the integrated burner control to open a gas valve and supply gas to a burner combustion chamber comprising:

  • a flame sensor for sensing for the presence of a flame in the combustion chamber; and

    means for sending a sequence of pulses to the flame sensor and for receiving back from the flame sensor the same sequence of pulses thereby normally indicating the presence of a flame.

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