Rheem 627 series Owner's Manual And Installation Instructions page 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
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
"Temperature Control"
to
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:
864 series
866 series
The preset outlet temperature setting of this water
Note:
heater cannot be adjusted by the householder. The setting
can only be adjusted by the installer, Rheem Service or their
nearest Accredited Service Agent.
Note: 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 or
higher, and that a remote temperature controller is not used.
Warning: Temperature controllers must not be fitted to this water heater (864 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 80°C and possibly higher depending upon the model of solar water heater
installed.
HOTTER WATER INCREASES THE RISK OF SCALD INJURY
This water heater can deliver water at temperatures which can cause scalding. 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 be required by regulations that an approved temperature limiting device be fitted
into the hot water piping to the bathroom and ensuite when an 864 series 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 if no controllers are installed and the preset outlet temperature setting has not been adjusted below
55°C or if a Kitchen controller is installed, still allow hotter water to the kitchen and laundry.
An 866 series water heater will not deliver temperatures exceeding 50°C, in accordance with AS 3498. There
is no requirement in AS/NZS 3500.4 to fit a temperature limiting device if this water heater is installed in
other than an early childhood centre, school, nursing home or a facility for young, aged, sick or disabled
people.
shown on page 47, a pressure limiting valve must be fitted. The supply pressure
on page 11).
60°C
50°C
ABOUT YOUR WATER HEATER
maximum Kitchen and Bathroom
minimum Kitchen and Bathroom
5
maximum Kitchen controller
temperature setting 864 series
maximum recommended supply
temperature to bathrooms and
ensuites.
maximum Bathroom controller
temperature setting 864 series
controller temperature setting
866 series
controller temperature setting