| 摘要 |
PURPOSE:To facilitate dismantling and restrain an unreasonable power upon connecting by a method wherein the connecting section of a heating hot-water circuit is constituted so as to insert a circulating pump to an expansion tank without using of stop bolts and metal fittings fixing the circulating pump to the predetermined position are provided in the device. CONSTITUTION:A projected connecting section 11 having a penetration hole 11a for inserting in the inside part is formed on a part of the expansion tank 1. On the other hand, the penetration hole 12a for the circulating water absorption is provided inside the projected connecting section 12 which is provided to the case 4 of the circulating pump 3 and a ring shape groove 12b, which an O ring 13 for sealing is fitted on the outer peripheral surface thereof, is formed. Moreover,the connecting section 12 of the circulating pump 3 after fitting of the O ring for the ring shape groove 12b is inserted into the projection section 11 of the expansion tank 1, further, the circulating pump 3 is fixed to a cladding case by the metal fittings 10 so as not to shift from the connecting position. The unreasonable power is not applied for both of the expansion tank and the circulating pump, therefore, the damage thereof and the leakage of the circulating water may be avoided. |
