Rheem Water Heater - Manual (Page 34)

INSTALLATION – SOLAR COLLECTORS
34
Maximum Height To Collectors
The solar collectors must be the highest point of the system. The maximum
height of the solar installation, from the base of the solar storage tank to the top
of the solar collectors, is 9 m. The pump supplied will not circulate closed circuit
fluid through heights greater than 9 m and solar gain will not be achieved.
For heights greater than 9 m, an auxiliary pump (kit PN 299914) must be
installed above and within 1 m of the solar storage tank. The installation of an
auxiliary pump will enable a maximum height of 18 m to be achieved. Refer to
“Auxiliary Pump” on page 49.
Closed Circuit Drain Back Solar Pipe Work Installation Requirements