| 摘要 |
PROBLEM TO BE SOLVED: To achieve high detection accuracy and usability, in a combustion device and a water heater including a CO sensor. ! SOLUTION: A control unit 30, until predetermined standby time elapses during a combustion operation and after combustion completion of a burner 10, selects a normal mode for controlling a CO sensor 20 to be a first temperature, and on the other hand, after the standby time elapses, it selects a power saving mode for allowing the CO sensor 20 to become a temperature lower than the first temperature. The control unit 30, in a state where the combustion is on standby, heats up the CO sensor 20 and performs zero point correction of the CO sensor 20 after the heat-up completion. The control unit 30, when a combustion command of the burner 10 is generated during execution of the power saving mode, heats up the CO sensor 20. The control unit 30, when rise time from the start of heat-up until sensor output becomes a reference value is equal to or less than threshold time, omits |
