| 摘要 |
PROBLEM TO BE SOLVED: To air bleed a non-self-priming pump securely by operating the non- self-priming pump with opening a water supplying circuit at the operating signal of a test operation switch, shutting off the bypass circuit by the time an air bleed complete signal is outputted and opening a bypass circuit after the air bleed complete signal is outputted. SOLUTION: A water feed valve 41 of a water supply circuit 4 that supplies water to a cistern 14 is opened operating a test operation switch and a floor heating valve 332 is opened. The air bleeding of a main circulating circuit 10 and a first and a second heating circulating circuits 3 and 2 are completed by operating non-self-priming pump 15 and after waiting predetermined time, the pump 15 is operated again, the supplementary burning valve 16 is opened together with it and then it is held in this state for the predetermined time. By flowing the enough quantity of water for the air bleeding through the inside of the pump 15 by reducing the fluid path resistance of the whole circuit compared to that of the circuit with the supplementary burning valve 16 is closed by setting a part of main circulating circuit 10 that is located between the upper flow end and the lower flow end to be a parallel circuit, the air inside the pump 15 can be bled completely. |
