HOT WATER HEATING DEVICE AND ITS CONTROL METHOD

摘要

PROBLEM TO BE SOLVED: To provide a hot water heating device to improve the efficiency of hot water heating and enable to prevent breakage of a heating apparatus. SOLUTION: In the hot water heating device formed that a heat exchanger 11 for a hot water feeder and hot water terminal devices 2 and 3 are interconnected through a loop having a circulation pump 5, two-way communication is effected by the hot water terminal device and a control unit 8 of hot water feeder, and the number of revolutions of the circulation pump 5 is controlled according to the operation states of the hot water terminal devices 2 and 3. Further, in case the number of revolutions of the circulation pump 5 is increased, the number of revolutions of the circulation pump 5 is interlocked with the opening state of thermal valve 6 and the operation state of the hot water terminal device, and the rapid increase of an internal pressure in the loop is prevented.