| 摘要 |
<p>PROBLEM TO BE SOLVED: To dispense with exchange of individual control part by controlling boiling of hot water storage tanks of first and second hot water supply unit corresponding to the connection of the first and second hot water supply units to supply a large volume of hot water since the initial boiling. SOLUTION: A hot water storage type hot water supply unit 1 is provided with hot water storage tanks 5, 6, and the hot water storage tanks 5, 6 are provided with heating bodies 7, 8 and connected to each other in series through a connection pipe 9, and are provided with a control part 10 to control energization to the heating bodies 7, 8. A hot water storage type hot water supply unit 2 is provided with hot water storage tanks 13, 14 inside, the hot water storage tanks 13, 14 are provided with heating bodies 16, 17 respectively and connected to each other in series through a connection pipe 17, and are provided with a control part 18 to control energization to the heating bodies 15, 16. When the hot water storage type hot water supply units 1, 2 are connected in series through a connection pipe 19, the heating bodies 7, 8 of the hot water storage type hot water supply unit 1 closer to a hot water supply port 3 are energized, and the control parts 10, 18 are integratedly controlled by a control operation part 20 so as to boil water in the hot water storage tanks 5, 6.</p> |
