| 摘要 |
PROBLEM TO BE SOLVED: To provide a water supply heating system which does not require modification of a water supply tank of a boiler, and can maintain tapping temperature as desired through a heat pump.SOLUTION: To a water supply tank 3, water can be supplied through a water supply channel 8 via a condenser 14 of a heat pump 4, and water can be supplied through a make-up water supply channel 9 not via the condenser 14. Water supply to the water supply tank 3 via the make-up water channel 9 is performed if a water level in the water supply tank 3 is lower than a first water level, and if it exceeds a second water level higher than the first water level, water supply is stopped. Water supply to the water supply tank 3 via the water supply channel 8 is started based on a water supply start to the water supply tank 3 via the make-up water channel 9, and is stopped based on a water supply stop to the water supply tank 3 via the make-up water channel 9. Preferably, during water supply to the water supply tank 3 via the water supply channel 8, the heat pump 4 is operated, and a water flow rate to the condenser 14 is regulated so that outlet side water temperature of a condenser 14 of the heat pump 4 is maintained at set temperature. |
