| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To easily cope with a temporary increase and the sudden change in the use of hot water. <P>SOLUTION: This piping structure comprises hot water tanks 1, 2, water supply pipes 4, 5 connected to inlet sides of the hot water tanks 1, 2 in parallel, hot water supply pipes 6, 7 connected to outlet sides of the hot water tanks 1, 2, and hot water returning pipes 10, 11 connected to the inlet sides of the hot water tanks 1, 2 through the water supply pipes 4, 5. One of the hot water tanks 1 and the hot water supply pipe 7 connected to the outlet side of the other hot water tank 2 are connected by a hot water supply pipe 27 provided with a switch valve 26 on its middle part, and the specific water supply pipes 4, 5 and the hot water supply pipes 6, 7 are provided with switch valves 14, 16, 17, 19, 20, 21, 28, 29 for switching the hot water tanks 12 from a parallel condition to a series condition, switching the same to use only the hot water tank 2 when the maintenance of the other hot water tank 1 is performed or a cam body is checked, or switching the same to use only the hot water tank 1 when the maintenance of the other hot water tank 2 is performed, or the can body is checked. <P>COPYRIGHT: (C)2003,JPO</p> |
