Fuel-fired heating appliance with temperature-based fuel...

Combustion – Timer – programmer – retarder or condition responsive control – By combustion or combustion zone sensor

Reexamination Certificate

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Details

C431S078000, C431S080000, C431S033000, C122S504000, C122S504100, C122S504300, C126S287500

Reexamination Certificate

active

06893253

ABSTRACT:
A gas-fired water heater is provided with a combustion shutoff system which precludes further combustion within the water heater's combustion chamber in response to a combustion temperature therein reaching a predetermined level correlated to and indicative of a predetermined, undesirably high concentration of carbon monoxide present in the combustion chamber. In various illustrated embodiments thereof, the combustion shutoff system is operative to terminate further combustion air inflow to the combustion chamber, or terminate further fuel flow to the burner portion of the water heater.

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