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US20100192873 |
Burner Flashback Detection and System Shutdown Apparatus
A fuel-fired water heater is provided with a premixing type main burner and an associated pilot burner for igniting it. A specially designed protective system is operative to detect a flame... |
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US20090061367 |
APPLIANCE HAVING A SAFETY STRING
A gas-fired appliance is disclosed that includes a gas valve powered by a power source. A plurality of switching units, each responsive to a condition of the appliance, are arranged in series... |
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US20100330515 |
GAS SHUTOFF DEVICE AND ALARM-COMPATIBLE SYSTEM METER
An object of the invention is to appropriately control the use limit function of an appliance according to the concentration level of CO gas. A gas shutoff device is made up of a flow rate... |
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US20120135360 |
Premix Flashback Control
An apparatus includes a furnace structure defining a combustion zone, and a tube that discharges fuel-oxidant premix into the combustion zone through an outlet from the tube. A reactant supply... |
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US20080003530 |
Communicating control for fuel fired heating appliance
A controller for a fuel-fired heating appliance is provided that includes at least one sensor for detecting the presence of at least one of a flammable vapor or a carbon monoxide gas. The... |
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US20070215066 |
Water heater with flammable vapor and co sensors
A water heater including a water container, a combustion chamber adjacent the water container, a burner associated with the combustion chamber, a flue gas collector located to receive flue gases... |
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US20090004612 |
Gas-Fired Heating Appliance Having a Flammable Vapor Sensor Control Device
A gas-fired heating appliance includes a burner, a gas valve module for supplying a fuel gas to the burner, a power module for applying a voltage to the gas valve module, and a flammable vapor... |