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

Liquid heaters and vaporizers – Stand boiler – And condition responsive feature

Reexamination Certificate

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Details

C122S014210, C122S504000, C122S504100, C122S504300, C431S021000, C431S077000, C431S078000

Reexamination Certificate

active

06964248

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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