Rheem Gas Domestic Indoor Water Heater Instruction Manual

This water heater must be installed and serviced by a qualified person.
Please leave this guide with the householder.
Owner’s Guide
and
Installation Instructions
Electric Domestic
Water Heater

PATENTS
This water heater may be protected by one or more patents or registered designs
in the name of Rheem Australia Pty Ltd.
TRADEMARKS
® Registered trademark of Rheem Australia Pty Ltd.
TM Trademark of Rheem Australia Pty Ltd.
Note: Every care has been taken to ensure the accuracy in preparation of this
publication. No liability can be accepted for any consequences,
which may arise as a result of its application.

3
CONTENTS
HOUSEHOLDER - We recommend you read pages 4 to 20.
The other pages are intended for the installer
but may be of interest
About Your Water Heater............................................................4
Regular Care ..............................................................................10
Water Supplies...........................................................................14
Save A Service Call ...................................................................18
Installation..................................................................................21
Connections –Plumbing ..........................................................30
Connections –Electrical...........................................................34
Commissioning..........................................................................37
Draining The Water Heater .......................................................40
Warranty .....................................................................................41

4
ABOUT YOUR WATER HEATER
WATER HEATER APPLICATION
This water heater is designed for use in a single family domestic dwelling for
the purpose of heating potable water. Its use in an application other than this
may shorten its life.
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). A water heater with a supply cord and plug is suitable for
indoor installation only. All other water heaters can be installed indoor or
outdoor. Optima models have an extended manufacturer‟s warranty (refer to
the Rheem warranty on page 41).
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.
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 M50 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

ABOUT YOUR WATER HEATER
5
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 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 a Rheemglas or Optima 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.
A RheemPlus water heater will not deliver temperatures exceeding 50°C, in
accordance with AS 3498. There is no statutory requirement 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.
THERMOSTAT
The thermostat automatically controls the electricity supply to the heating unit
so a constant temperature is maintained. The thermostat and its protective over
temperature cut out is mounted inside the front cover of the water heater. There
is no need to switch the water heater off when it is not in use, except when you
are on an extended holiday. The thermostat is fully automatic and power is only
used when heating is required.
TEMPERATURE ADJUSTMENT
An Optima water heater features a user adjustable
thermostat, which allows you to choose the most
suitable temperature for your hot water needs. To
adjust the temperature, push in the child resistant
knob and turn anticlockwise to decrease or
clockwise to increase the temperature setting. The
Optima has a minimum temperature setting of 60°C
and a maximum temperature setting of 75°C.
A Rheemglas or RheemPlus water heater features a tradesperson adjustable
thermostat. This requires a licensed tradesperson to make any temperature
adjustments. The thermostat has a maximum temperature setting of 70°C
(75°C for M50 models) and a minimum temperature setting is 60°C.
We advise you have your electrician adjust the thermostat to the lowest
temperature setting that meets your needs, especially if there are young
children or elderly people in your home. Refer to “Hotter Water Increases The
Risk of Scald Injury” on page 5.