HEATING SYSTEM, HEATING HOT WATER SYSTEM, AND CONTROL METHOD OF HEATING SYSTEM

PROBLEM TO BE SOLVED: To provide a heating system, a heating hot water system, and a control method of the heating system capable of positively preventing a pressure rise in a heating circuit. SOLUTION: The heating system 100 is equipped with a hot water storage tank 2 storing hot water, a heat pump system 1 having a heat source circuit 16 including a condenser 13 and circulating a coolant, and heating hot water supplied from the hot water storage tank 2 via the condenser 13 and returning it to the hot water storage tank 2, a circulation circuit 4 circulating the hot water stored in the hot water storage tank 2 between the hot water storage tank 2 and a heating terminal 8, a temperature control means 70 for controlling a return temperature of the hot water returned to the hot water storage tank 2 from the heating terminal 8 by controlling at least one of a flow rate or a temperature of the hot water supplied to the heating terminal 8, and a detection means 67 for detecting that pressure in the heat source circuit 16 of the heat pump system 1 has reached a predetermined value or higher. COPYRIGHT: (C)2010,JPO&INPIT