| 摘要 |
<p>PURPOSE:To prevent delay in the combustion of a burner during the use of a water heater by transmitting a solar high cut temperature to a higher temperature than a temperature during the OFF period of insulated combustion only during the simultaneous operation of the immediate hot water supply operation and the operation utilizing hot water by solar heat. CONSTITUTION:An immediate hot water supply function is so arranged that hot water heated with a heat exchanger 20 is circulated with a hot water return path 40 connected to the course of an intake path 10 from the half way of a hot water delivery path 30 and with a circulation pump 41 provided in the hot water return path 40 to accomplish an immediate hot water supply operation and a function utilizing hot water by solar heat that the solar hot water as heated with a solar heat exchanger 50 is introduced to the intake path 10 to utilize. When the immediate hot water supply function operation and the solar hot water-oriented function operation are performed simultaneously, a solar high cut temperature is transmitted automatically to a higher temperature than the temperature during the OFF operation of insulated combustion in the immediate hot water supply function operation. This can prevent boiling of the hot water from the solar heat exchanger 50 by combustion with a burner accurately.</p> |
