PURPOSE: To reduce the flicker of a luminaire by controlling the current-carrying to another heater in the non-current carrying period of intermittent current-carrying when the current- carrying to another heater is required during the intermittent current-carrying to a specified heater.

CONSTITUTION: A current-carrying command generating means 43 inputs each information of the information 33a related to the current-carrying ratio of a hot water heater 5, the information 34a related to the current-carrying ratio of a drying heater 6, the current-carrying demand 36a to a heating heater, and the designation information 31c for preferentially current- carrying heater, and outputs corresponding current-carrying commands 4a, 4b, 4c every heater 5, 6, 7. When the given current-carrying demand is for only one system, the current-carrying command generating means 43 controls the current-carrying only to the demanded heater. When the current-carrying demands for a plurality of systems are given, the current-carrying command generating means 43 specifies the heater to carry a current on the basis of the designation information 31c for preferentially current-carrying heater, and when the currentcarrying ratio information to the specified heater requires intermittent current-carrying, a current carrying pattern is read from an intermittent current carrying pattern memory means 42 to generate and output a heater current carrying command, and the current carrying command is outputted in the non-current carrying period the preferential heater.