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ABOUT YOUR WATER HEATER
WATER HEATER APPLICATION
This water heater is designed for use in a single family domestic dwelling for the purpose of heating potable
water. Its use in an application other than this may shorten its life.
MODEL TYPE
®
Your Rheem
thermosiphon solar water heater is designed for both the solar collectors and the solar storage
®
tank to be roof mounted. The solar storage tank has a Colorbond
jacket. The 52L tank (direct system) is
suitable for installation with NPT200, L or CSA2007 solar collectors and the 52H tank (indirect system) is
suitable for installation with SPA2000, NPT200, L or CSA2007 solar collectors.
The 52L series systems do not have freeze protection. These systems are not suitable for installation in areas
subject to frost or freeze conditions. Freeze conditions occur below 6°C. These systems have NO WARRANTY
"Terms of the Rheem Warranty"
for freeze damage (refer to
on page 4).
The 52H series systems are suitable for installation in areas subject to frost or freeze conditions. Freeze
conditions occur below 6°C. These systems have NO WARRANTY for freeze damage if non Rheem approved
"Terms of the
closed circuit fluid has been used or if the closed circuit fluid has been incorrectly mixed (refer to
Rheem Warranty"
on page 4).
This water heater is designed to be installed as an electric boosted solar water heater with its booster heating
unit connected to a power supply, however it may be installed with an in-series continuous flow or storage
booster.
If this water heater is installed with an in-series booster, then the electric booster heating unit will not be
connected to a power supply and the references to the electric booster heating unit, thermostat and boosting
controls in this Guide will not be applicable to the installation. For information relating to the function and
operation of the in-series booster, refer to the Owners Guide and Installation Instructions supplied with the
booster water heater.
SOLAR OPERATION
The Rheem solar thermosiphon system has its stainless steel solar storage tank installed on the roof directly
coupled to the solar collectors. The 52L series are direct solar hot water systems and the 52H series are
indirect solar hot water systems with a heat exchanger in the solar storage tank.
The solar water heater uses the thermosiphon principle, without the need for a pump, circulator or sensors. It
works on the simple scientific fact that hot fluid rises. The solar collector's low-iron content solar glass allows
more solar energy from the sun to pass through and be used to heat the collector's absorber plate than
conventional glass. As the sun heats the water or closed circuit fluid in the solar collectors, the increase in
temperature causes the fluid to rise through a copper pipe into the storage tank (52L series) or heat exchanger
(52H series) where it transfers its heat into the water in the solar storage tank. This allows cooler fluid from the
storage tank or heat exchanger to flow into the solar collectors to be heated by the sun's energy. This process
continues while solar energy is available.
52L series: The solar storage tank and solar collectors are
connected by copper pipe work and form an open circuit which is
filled with potable water.
52H series: The heat exchanger and solar collectors are
connected by copper pipe work and form a closed circuit which is
filled with closed circuit fluid. The closed circuit fluid is a solution of
a blue, non-toxic food grade propylene glycol concentrate mixed
with water. The closed circuit concentrate is used to lower the
freezing temperature of the closed circuit fluid and provides
protection against freezing. The closed circuit also provides
protection to the solar collectors and solar pipe work against harsh
water chemistry.
Automatic safety controls are fitted to the water heater to provide
safe and efficient operation.
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