Heating device having a thermal cut-off circuit for a fuel line and method of operating the same
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United States of America Patent
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Oct 21, 2008
Grant Date -
Dec 13, 2007
app pub date -
Jun 7, 2006
filing date -
Jun 7, 2006
priority date (Note) -
Expired
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Abstract
A thermal cut-off circuit for a gas-fired device and method of operating the circuit. The thermal cut-off circuit includes a thermal cut-off switch and an ambient thermal switch. The thermal cut-off switch is positioned in a combustion chamber and the ambient thermal switch is preferably positioned in a flow of air entering the combustion chamber. The thermal cut-off circuit ensures a gas valve is closed upon detecting a possible incomplete combustion in the combustion chamber.
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