Retroffitable convection heat exchanger for furnace ranging from small to medium size, has pressure relief valve provided in exchanger, bypass line bypassing fluid to extent that fluid is not heated, and holder serving for wall fastening

摘要

The exchanger has spirally, upwardly extending rectangular channels provided in a wall of the exchanger, and conically tapered upto an upper end for obtaining natural circulation. Circulation pumps are connected between the channels. Inlet and outlet connections are provided with blocking valves. A pressure relief valve is provided in the exchanger. A bypass line bypasses fluid i.e. water, to extent that the fluid is not heated. An additional holder serves for wall fastening. The exchanger is connected to a buffer tank for feeding heat recovered from standard heating or domestic water heating.