In the integral collector storage solar system shown in Figure
5 at right the hot, water storage system is the, collector. Cold
water flows progressively through the collector where it is
heated by the sun. Hot water is drawn from, the top which. Is
the hottest and replacement, water flows into the bottom.
This system is simple because pumps and controllers are not
required.? On, demandCold water from the house flows into
the collector and hot water from the collector flows to a
standard hot water auxiliary. Tank within the house. A flushtype
freeze protection valve is installed in the top plumbing
near the collector. As temperatures. Near, freezing this valve
opens to allow relatively warm water to flow through the
collector to prevent freezing. In south. Florida and certain
.Areas of central Florida the thermal, mass of the large water
volume within the ICS collector provides a means of freeze
protection.
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