| 摘要 |
PROBLEM TO BE SOLVED: To provide an instantaneous hot-water supply system capable of detecting that hot-water is being supplied without a special sensor.SOLUTION: An instantaneous hot-water supply system 1 comprises: a type P water heater 10 which heats water flowing in a first supply pipe 2; a type N water heater 30 which heats the water flowing in a second supply pipe 3; a check valve 6; and a connection controller 60. The connection controller 60 executes: hot-water supplying operation to activate a first burner 12 or a second burner 32 with a circulation pump 16 stopped when a detected flow rate of a second flow rate sensor 34 is not less than a hot-water supply detection flow rate; and circulating temperature keeping operation to activate the first burner 12 with the circulation pump 16 operated when the detected flow rate of the second flow rate sensor 34 is less than the hot-water supply detection flow rate. |
