| 摘要 |
PROBLEM TO BE SOLVED: To easily confirm an operation of a saving function in the case of operating the function at the time of instructing a start of an operation by providing an informating means for informing of the saving operation when the function is started. SOLUTION: When a room temperature reaches an automatic stop temperature or above during a combustion operation, a saving function is operated, and this operation is informed by displaying the operation. That is, a save lamp 52 on an operation panel 4 is flashed, and the combustion operation is stopped. The stopping state of the combustion state is continued until the room temperature is lowered to an automatic start temperature or below. If the function is operated when an operation ON switch 31 has been pressed, in addition to flashing of the lamp 52, it is informed by a sound of a buzzer 15 to aurally recognize it. Thus, a user can effectively recognize the operation of the function.
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