CONTROLLER OF AIR CONDITIONER WITH REFRIGERANT HEATER

PURPOSE:To maintain a specified operation even when a switchover of a combustion mode setting switch is forgotten, by a method wherein an electric current supply device is changed over synchronously with the combustion mode setting device and operation is returned to the normal combustion mode when a specified period of time has elapsed after operation is changed over to the minimum or maximum combustion mode. CONSTITUTION:When a normal mode changeover switch 7c inside a combustion mode changeover switch 7 is turned on, an electric current supply device for a proportioning valve 4 synchronizes with the changeover switch 7c and supplies the normal amount of electric current to the proportioning valve 4, so that the proportioning valve 4 is opened up to an opening degree at which gas flows at a normal flow rate and a refrigerant heater 2 operates at a normal combustion state corresponding to the gas flow rate. Similarly, when a minimum mode changeover switch 7a or a maximum mode changeover switch 7b is turned on, the refrigerant heater 2 operates at a minimum or maximum mode corresponding to the gas flow rate regulated by the proportioning valve 4. And, when the minimum or maximum mode changeover switch 7a or 7b remains turned on for a long time period, the normal mode changeover switch 7c is automatically turned on. Therefore, mis-setting can be diminished.