| 摘要 |
A roll-out flame detector mounted proximate to the lower edge of the outside of the flame wall between the combustion chamber and the control chamber of a swimming pool heater. The flame detector includes an elongated thermal fuse element exposed to potential roll-out flames and electrically connected in the electrical control for the fuel control valve to shut down the flow of fuel when the fuse element is ruptured by the roll-out flame.
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