Patent ID: 6109531
Filing Date: 2000-08-29
Classification: F24D

Abstract:
A high reliability heating system comprising:a furnace burner unit;a heat exchanger in heat receiving connection with said furnace burner unit;first and second furnace control mechanisms, each said first and second furnace control mechanism includes blowers and control elements in functional relationship with said furnace burner unit and said heat exchanger;each said first and second furnace control mechanism being independently operable to control the operation of said furnace burner unit and said heat exchanger; anda controller mechanism selector mechanism having a control input in connection with said first furnace control mechanism and being in controlling connection with said first and second furnace control mechanism such that, in response to receiving an abnormal operation signal from said first furnace control mechanism, said controller mechanism selector mechanism switches control of said furnace burner unit and said heat exchanger from said first furnace controller mechanism to said second furnace controller mechanism.