| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent generation of drain in a combustion test in a manufacturing line. <P>SOLUTION: A bypass pipe 19 is mounted between a water supply pipe 9 and a heat transfer pipe of a main heat exchanger 7, and a manual switch valve 20 is mounted on a branch portion to a bypass pipe 19 of the water supply pipe 9 to switch a first switching position for communicating a flow channel inside only with a sub-heat exchanger 8 side and a second switching position for communicating the flow channel inside with the sub-heat exchanger 8 side and a main heat exchanger 7 side in a state that a flow rate to the sub-heat exchanger 8 side is smaller than that to a bypass pipe 19 side, by operating a switch lever 23. As the combustion test is performed in a state that the manual switch valve 20 is placed at the second switch position and the heating is performed in a state that water passing quantity is small at the sub-heat exchanger 8 side, a temperature rises and the generation of drain can be prevented. <P>COPYRIGHT: (C)2007,JPO&INPIT |
