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ABOUT YOUR WATER HEATER
5
GAS BOOSTING FOR A SOLAR WATER HEATER
Water stored in the solar storage tank passes through the in-series gas booster when a hot tap is opened. The
in-series gas booster is for heating water at times of low solar energy gain, such as during cloudy or rainy
weather, or during colder months.
Solar heated water can reach temperatures up to 70°C to 80°C for a Premier Loline and Loline pumped system
and a Hiline thermosiphon system and possibly higher for a Premier Hiline thermosiphon system. The in-series
gas booster operates automatically. When the solar heated water temperature is 58°C or higher, the flow
passes through the in-series gas booster without boosting. When the solar heated water temperature is below
58°C, the in-series gas booster heats the water to its preset outlet temperature setting.
HOW HOT SHOULD THE WATER BE?
The water heater may be installed with one or more user adjustable temperature controllers, which allow you
to choose the most suitable temperature for your hot water needs (refer to “Temperature Control” on page 11).
If a controller is not installed, the water heater heats the water to the preset outlet temperature setting. The
factory preset outlet temperature setting is:
874 series 60°C – AU 55°C – NZ
876 series 50°C
Note: The preset outlet temperature setting of this water heater cannot be adjusted by the householder. The
setting can only be adjusted by the installer, Rheem Service or their nearest Accredited Service Agent / Centre.
Australia New Zealand
Note: Australian Standard AS 3498 requires that a water heater provides the means to inhibit the growth of
Legionella bacteria in potable water. When this water heater is used as an in-series booster for a solar water
heater it can satisfy this AS 3498 requirement provided it is energised, the booster preset outlet temperature
setting is 70°C, and that a remote temperature controller is not used.
Warning: Temperature controllers must not be fitted to this water heater (874 series) if it is installed as an
in-series gas booster with a solar water heater system because water at a temperature much higher than the
controller setting can be delivered. If a solar water heater is installed to an existing water heater installation,
then all controllers must be disconnected and removed.
If this water heater is installed as part of a solar water heater system, the system can deliver water at
temperatures from 58°C up to 80°C and possibly higher depending upon the model of solar water heater
installed.
maximum recommended supply
temperature to bathrooms and ensuites.
maximum Bathroom controller
temperature setting 874 series.
maximum Kitchen and Bathroom
controller temperature setting
876 series.
maximum Kitchen controller
temperature setting 874 series.
maximum recommended supply
temperature to bathrooms and ensuites.
maximum Bathroom controller
temperature setting 874 series
minimum Kitchen and Bathroom
controller temperature setting
maximum Kitchen controller
temperature setting 874 series
minimum Kitchen and Bathroom
controller temperature setting
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