| 摘要 |
PURPOSE:To enable to supply hot water in a stable manner, by controlling the feed rate of water to a large hot-water supplying apparatus together the feed rate of gas to the same by detecting the drop of gas pressure that is occurred at the peak time of gas usage at a particular section of a gas utilizing system. CONSTITUTION:Supply of gas to a main gas burner 4 is controlled automatically by varying the opening of a gas valve by sending to a gas controller 2 an electric signal the level of which is varied with the pressure of supply gas detected by a gas pressure detector 3, so that gas is supplied to the main gas burner 4 at a rate meeting with the pressure level of supply gas. In case that the amount of gas consumed by a large hot-water supplying apparatus is so large that supply of gas to small peripheral gas appliances is affected seriously, the rate of gas supply to the large hot-water supplying appraturs is reduced for restoring a proper gas pressure for the small peripheral gas appliances, so that they can be operated normally. Further, since the opening of a feed water valve is also controlled automatically by sending the electric signal from the gas pressure detector 3 to a water-flor controller 13, water is supplied to a heat exchanger 7 at a rate corresponding to the level of gas pressure. |
