WATER HEATER WITH SOLAR WATER HEATING FUNCTION

摘要

PROBLEM TO BE SOLVED: To enable immediate hot water supply at a low running cost. SOLUTION: An immediate hot water supply circuit is constituted by connecting a solar water heater pipe 70 of a solar water heater B to the inlet pipe 21 of a main water heater A through a solar water heater connecting part C and connecting the outlet pipe 22 of the main water heater A to a solar water heater B through an immediate hot water supply circulation pipe 82. When the burner of the main water heater A is not burning and the main water heater is not operating for supplying hot water, a circulation pump 85 arranged in the immediate hot water supply circulation pipe 82 is operated and the hot water inside the immediate hot water supply circuit is heated or kept warm by the solar water heater B.