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ABOUT YOUR WATER HEATER
The booster heating unit may be connected to an Off-Peak (overnight) electricity supply, however this will only
allow the booster to heat the water overnight. If this type of connection is considered, care must be taken to
ensure there is sufficient boost capacity to meet the household's full day and night hot water supply during
periods of no or low solar gain, particularly in cold weather.
Temperature Redistribution
(refer to page 20) is
more evident with this type of electricity supply connection.
The booster heating unit is controlled by an electric thermostat. The thermostat and its over temperature energy
cut out are mounted on the solar storage tank behind the side cover. If required, the water is heated
automatically to the thermostat setting by the booster heating unit when power is available.
HOW HOT SHOULD THE WATER BE?
The temperature the system will achieve under solar heating
typical maximum temperature
depends on many factors, including the level of solar radiation
from solar gain
available, orientation and inclination of the solar collectors,
incoming cold water temperature and volume of hot water used.
maximum booster setting
Under normal household use and average operating conditions,
the system may achieve a water temperature of approximately
minimum booster setting
twice the maximum daily outside air temperature.
During periods of low solar energy gain, the water temperature can
maximum recommended
be boosted by the thermostatically controlled electric booster
supply temperature to
"Booster Control"
heating unit. Refer to
on page 12. Rheem
bathrooms and ensuites
recommends the thermostat is set at 60°C to maximise solar
contribution.
Note: AS 3498 requires that a water heater provides the means to
inhibit the growth of Legionella bacteria in potable water. This
water heater can satisfy this AS 3498 requirement provided the
electric booster is energised for a sufficient period each day and
the electric booster thermostat setting is 60°C or higher.
If this water heater is installed with an in-series continuous flow gas booster, then this requirement of AS 3498
can be satisfied provided the booster is energised, its preset outlet temperature setting is 70°C or higher and
a remote temperature controller is not used.
If this water heater is installed with an in-series storage booster, then this requirement of AS 3498 can be
satisfied provided the storage booster is energised and its thermostat setting is 60°C or higher.
HOTTER WATER INCREASES THE RISK OF SCALD INJURY
This water heater can deliver hot water at temperatures which on occasion could exceed 75°C, sufficiently hot
to cause severe scalding. Water at this temperature may have been plumbed to fixtures where water hotter
than 50°C is allowed, such as the kitchen and laundry.
Check the water temperature before use, such as when entering a shower or filling a bath or basin, to ensure
it is suitable for the application and will not cause scald injury.
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, a minimum
temperature setting of 60°C and is factory set at 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 11.
11
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