Solar installation

摘要

A solar heat assembly (10) has a collector panel (K) with an inlet tube (14) and a return tube (16) arranged for part of their path as a pair (18) to and from a heat exchanger (22) in a tank (20). The return pipe (16) has a pump (26) and bypass (28) as required. Either the inlet (14) or return (16) has a drain-back unit (28) which is especially located in the heat exchanger tank (20) and is constructed as a single unit with the heat exchanger (22).