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ABOUT YOUR WATER HEATER
We recommend and it may also be required by regulations that an approved temperature limiting device be
fitted into the hot water pipe work to the bathroom and ensuite when this water heater is installed. This will
keep the water temperature below 50°C at the bathroom and ensuite. The risk of scald injury will be reduced
and still allow hotter water to the kitchen and laundry.
TEMPERATURE ADJUSTMENT
The water heater features a tradesperson adjustable thermostat. This requires a licensed electrical worker to
make any temperature adjustments. The thermostat has a maximum temperature setting of 70°C and a
minimum temperature setting of 60°C.
We advise you to have a licensed electrical worker adjust the thermostat to the lowest setting which meets
"Hotter Water
your needs, especially if there are young children or elderly people in the home. Refer to
Increases the Risk of Scald Injury"
on page 12.
PRECAUTIONS
The water heater must be maintained in accordance with the Owner's Guide and Installation Instructions. Refer
"Maintenance Requirements"
to
on page 17.
If this water heater is to be used where an uninterrupted hot water supply is necessary for your application or
business you should ensure that you have back up redundancy within the hot water system design. This should
ensure the continuity of hot water supply in the event that this water heater were to become inoperable for any
reason. We recommend you seek advice from your plumber or specifier about your needs and building back
up redundancy into your hot water supply system.
FREEZE PROTECTION
The 52H series solar water heaters are an indirect closed circuit solar hot water system with a heat exchanger
in the solar storage tank. The heat exchanger and solar collectors form a closed circuit and are 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.
During installation, the closed circuit concentrate is blended with water. The amount of closed circuit
concentrate supplied with this water heater provides protection in frost prone areas to a certain temperature.
The
table on page
65 lists the percentage of Coolblend concentrate fluid in the closed circuit of each system
and the recommended minimum ambient temperature for the system, for the number of bottles supplied with
each system. If a lower temperature protection is anticipated, additional Coolblend concentrate will be required
to provide a greater concentration in the closed circuit fluid.
The system has NO WARRANTY for freeze damage if non Rheem approved closed circuit fluid has been used
"Terms of the Rheem Warranty"
or if the closed circuit fluid has been incorrectly mixed (refer to
on page 4).
Note: The 52L series systems do not have freeze protection. The system is not suitable for installation in areas
subject to frost or freeze conditions. Freeze conditions occur below 6°C. The system has NO WARRANTY for
"Terms of the Rheem Warranty"
freeze damage (refer to
on page 4).
CLOSED CIRCUIT JACKET RELIEF VALVE
The tank's closed circuit heat exchange jacket has a relief valve located in the vent pipe of the jacket. This
relief valve is to prevent over-pressurisation of the closed circuit either due to incorrect filling or abnormal
operating conditions.
During the water heater's first few months of operation, a small amount of fluid may discharge from the relief
valve until the ideal closed circuit fluid volume is established. Discharges from the valve after this time could
indicate the water heater is not operating efficiently. Under these circumstances phone Rheem Service or their
nearest Accredited Service Agent to arrange for an inspection. Do not attempt to service the water heater
yourself.
Do not remove the closed circuit relief valve as there may be a very high scalding risk present. When operating
in daylight, the heat exchange circuit will be pressurised and can contain superheated fluid and may contain
steam. At other times, it may be pressurised and contain high temperature fluid.
13
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