| 摘要 |
<p>PURPOSE:To prevent heat radiation and to enhance safety, by opening the secondary side of a safety valve to atmosphere, connecting the primary side thereof to the lower part of a hot water storing tank or a feed pipe between a check valve and the hot water storing tank, thereby discharging the expanded part of the volume of water due to heating. CONSTITUTION:The feeding pipe 24 having the check valve 25 and a pressure reducing valve 26 is connected to the lower part of the hot water storing tank 21. A hot water feeding pipe 27 having an air vent valve 30 is connected to the upper part thereof. A circulating pipe 31, which passes a circulating pump 32, a midnight power heater 22 as a heating source, and a heat source unit 23 having an electric opening and closing valve 36, is communicated to the lower part of the hot water storing tank 21 and the hot water feeding pipe 27. The safety valve 33 is provided in said heat source unit 23. The primary side 34 of the safety valve 33 is connected to the feed pipe 31 at the upstream side of the circulating pump 32, and the secondary side 35 is opened to the atmosphere.</p> |
