Hot-water cylinder for holding relatively low content incorporates a heat exchanger stretching from top to bottom over the largest part of an inner space

摘要

A heat exchanger (4) linked to a source of heat (8) via a four-path reversing valve (9) in a heat transfer medium circuit (5) receives a supply flow from top and bottom selectively by relying on an existing operating status. During normal heat-up process, that is, if no or only little amounts of water are drawn off, the heat exchanger receives a supply flow from below. If hot water is drawn off for a prolonged period, the heat exchanger receives a supply flow from top to bottom.