| 摘要 |
PURPOSE:To enable to supply a heat medium easily and without taking much time when a heat collector is arranged at a position higher than the head of a circulation pump by a method wherein heat medium supply pipes led from a high head auxiliary pump which is provided separately from the circulation pump is connected in advance to a pipe of the solar heat collecting circuit. CONSTITUTION:Bypass pipes 8 and 9 as the heat medium supply pipes are connected to an inlet pipe 1A on the downstream side of the circulation pump 2. The bypass pipe 8 forms itself an inlet pipe to which a discharge port of the auxiliary pump 10 of high head and the bypass pipe 9 forms itself an outlet pipe to which an intake port of the auxiliary pump is connected. With the above structure, when a water heater is installed, the auxiliary pump 10 is connected to the bypass pipes 8 and 9 in a condition in which changeover valves 8A and 8B are closed. Then, when the auxiliary pump 10 is operated together with the circulation pump 2 by opening the valves 8A and 8B and closing a changeover valve 11, the heat medium in an expansion tank 5 is pumped up into the heat collector 3. |
