| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a water heating system in which the replenishment of a circulation liquid is less frequent, and which has superior maintenance-saving characteristics, and to provide a storage tank used therein. <P>SOLUTION: The water heating system includes: a heater for heating the circulation liquid; a hot water usage terminal for receiving heat from the circulation liquid after heated by the heater; a hot water delivery unit for delivering the circulation liquid; and the storage tank 5 for storing the circulation liquid. The storage tank 5 includes a plurality of water supply lines 56 to 58 for indicating target water levels for the circulation liquid according to the amount of retaining liquid in a water circuit. Among the water supply waterlines 56 to 58, those which correspond to a water circuit with a smaller amount of retaining water are designed to indicate a higher water level. <P>COPYRIGHT: (C)2012,JPO&INPIT |
