ABOUT YOUR WATER HEATER
5
MAINS PRESSURE
The water heater is designed for direct connection to the mains water supply. If the mains supply pressure in
your area exceeds that shown on page 47, a pressure limiting valve must be fitted. The supply pressure
should be greater than 140 kPa for the rated flow and performance to be achieved.
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:
• 871 series 60°C – AU 55°C – NZ
• 875 series 48°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.
Note: AU – For 871 series models manufactured before 2007, the factory preset outlet temperature setting is
50°C.
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 (871 series) if it is installed as
an in-series gas booster with a solar water heater system or if a Water Star water heater is installed because
water at a temperature much higher than the controller setting can be delivered. If a solar or Water Star
water heater has been 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 75°C and possibly higher depending upon the model of solar water heater
installed.
maximum Kitchen controller
temperature setting 871 series.
maximum recommended supply
temperature to bathrooms and ensuites.
maximum Bathroom controller
temperature setting 871 series
minimum Kitchen and Bathroom
controller temperature setting
maximum Kitchen controller
temperature setting 871 series
maximum recommended supply
temperature to bathrooms and ensuites.
maximum Bathroom controller
temperature setting 871 series
minimum Kitchen and Bathroom
controller temperature setting
maximum Kitchen and Bathroom
controller temperature setting
875 series
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