Rheem Solar Hiline 52D Series Owner's Manual And Installation Instructions page 33

INCLINATION OF SOLAR COLLECTORS
To help maximise system performance, solar collectors should be installed with an optimum inclination. This
is equal to 90% to 100% of the local latitude angle when collectors are oriented within 60° of true north or true
south, and generally between 10° and 20° when the collectors are oriented between 60° and 90° from the
optimum orientation.
Generally, improved summer performance is obtained from an angle of inclination less than the optimum angle
and improved winter performance is obtained by an angle of inclination greater than the optimum angle. If the
angle of inclination varies by 20° from the optimum angle, the solar collectors will receive about 10% less total
annual solar radiation. The
AS/NZS 3500.4 states that solar collectors shall be installed at an angle within 20° of the local latitude angle.
However, the optimum inclination of solar collectors is not always practical or achievable. A thermosiphon solar
water heater may be installed at the roof angle for simplicity of installation and appearance, but must never be
less than 10° from the horizontal.
The water heater, when installed with the supplied mounting system, is suitable for installations with an
inclination of up to 30°. Where the solar water heater is installed at inclinations greater than 30°, a With-Pitch
frame is necessary. Contact Rheem or your local Rheem Solar Water Heater Distributor for details.
A Variable-Pitch frame can be installed to increase the angle of inclination of the thermosiphon solar water
heater. This type of frame should be used if the roof pitch is less than 10° or is more than 20° below the
optimum angle. Contact Rheem or your local Rheem Solar Water Heater Distributor for details.
The use of a Variable-Pitch frame should be discussed with the system owner. If this option is neither possible
nor acceptable to the system owner, then the system owner needs to be made aware of, understand and
accept that solar system performance will be reduced and increased boosting may be required to meet their
hot water requirements.
CYCLONIC OR HIGH WIND AREAS
For an installation of a thermosiphon solar water heater on a roof in a cyclonic or high wind area, a suitable
frame is required. Contact Rheem or your local Rheem Solar Water Heater Distributor for details.
LATITUDE OF SOME AUSTRALIAN CITIES
Adelaide 35°S
Alice Springs 24°S
Brisbane 27°S
Broken Hill 31°S
latitude of some Australian cities
Cairns 17°S
Canberra 35°S
Darwin 12°S
Geraldton 28°S
INSTALLATION – SOLAR COLLECTORS
are listed on page 33.
Hobart 42°S
Mildura 34°S
Melbourne 38°S
Perth 32°S
33
Port Hedland 20°S
Rockhampton 24°S
Sydney 34°S
Townsville 19°S