Technical data

4
ABOUT YOUR WATER HEATER
MODEL TYPE
The Rheem
®
water heater you have chosen will be either a Rheemglas
®
,
Optima™ or RheemPlus™ model. The Optima model has a temperature
adjusting knob on the lower front of the water heater. Rheemglas and Optima
models are available with either a single heating unit or with twin heating units
and the RheemPlus models are available with a single heating unit only (refer
to “Single Element Model” on page 7 and “Twin Element Model” on page 7).
The water heater can be installed indoor or outdoor. Optima models have an
extended warranty (refer to the warranty on page 40).
Water is stored in a vitreous enamel lined steel cylinder and heated by the
electric immersion heating unit. The thermostat controls the temperature.
Automatic safety controls are fitted to the water heater to provide safe and
efficient operation.
MAINS PRESSURE
The water heater is designed to operate at mains pressure by connecting
directly to the mains water supply. If the mains supply pressure in your area
exceeds that shown on page 19, a pressure limiting valve must be fitted. The
supply pressure should be greater than 350 kPa for true mains pressure
operation to be achieved.
HOW HOT SHOULD THE WATER BE?
The water heater features an
adjustable thermostat, which allows
you to choose the most suitable
temperature for your hot water needs.
Refer to “Temperature Adjustment” on
page 5.
A RheemPlus water heater is
temperature limited to deliver water not
exceeding 50°C.
To meet the requirements of the
National Plumbing Standard the
temperature of the stored water must
not be below 60°C.
If this water heater is installed as part
of a solar water heating system, we
recommend the thermostat is set at
60°C to maximise solar contribution.
maximum thermostat setting
Optima and 050 models
minimum thermostat setting
and minimum recommended
stored water temperature.
top heating unit thermostat
setting on a twin element
model (not adjustable)
maximum thermostat setting
Rheemglas and RheemPlus
(025, 080 to 400 models)
RheemPlus maximum
delivery temperature.
maximum recommended
supply temperature to
bathrooms and ensuites