| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a hot water heating system for improving the operability of equipment event at a low temperature. <P>SOLUTION: The hot water heating system includes a thermal valve 9 for connecting a heating terminal 13 with a hot water heating unit 1 by piping and direct piping connection openings (10, 12) for connecting the heating terminal 13 with the hot water heating unit 1 by piping without using the thermal valve 9. The system also connects any of a plurality of thermal valves not in use with a return header pipe when being directly connected as a direct type and prevents a hot water circulation circuit from being frozen by making a bypass connection configuration. <P>COPYRIGHT: (C)2012,JPO&INPIT |
