Rheem Stellar 8A0 330 Technical Document

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
Gas Domestic Outdoor Water Heater
8A0 330 stainless steel model

PATENTS
This water heater may be protected by one or more patents or registered designs
in the name of Rheem Australia Pty Ltd or Aquamax Australia Pty Limited.
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.
Warning: Upon completion of the installation and commissioning of the
water heater, leave this guide with the householder or responsible officer.
DO NOT leave this guide inside of the cover of the water heater, as it may
interfere with the safe operation of the water heater or ignite when the water
heater is turned on.

3
CONTENTS
HOUSEHOLDER –We recommend you read pages 4 to 22.
The other pages are intended for the installer
but may be of interest.
About Your Water Heater............................................................4
Regular Care ..............................................................................12
Water Supplies...........................................................................15
Save A Service Call ...................................................................19
Installation..................................................................................23
Connections –Plumbing ..........................................................32
Commissioning..........................................................................36
Lighting The Water Heater........................................................40
Draining The Water Heater .......................................................44
Warranty.....................................................................................46

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 model you have
chosen is suitable for outdoor installation only.
The model is a high efficiency, quick recovery
8A0 series Rheem Stellar™330 stainless
steel water heater.
Water is stored in a stainless steel cylinder
and heated by a gas burner located under the
cylinder. The heat produced by the burner is
transferred to the water through the base, top
and side walls of the storage cylinder with flue
baffle rings capturing heat to improve
efficiency. The gas supply to the burner is
controlled by the thermostat so the water is
heated to a constant 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 a user adjustable
thermostat, which allows you to personally
choose the most suitable temperature for your
hot water needs. Refer to “Temperature
Adjustment” on page 7.
To meet the requirements of the National
Plumbing Standard the temperature of the
stored water must not be below 60°C.
Note: AS 3498 requires that a water heater
provides the means to inhibit the growth of
Legionella bacteria in potable water. This
water heater can satisfy this AS 3498
requirement provided it is operating and the
thermostat setting is 60°C or higher, including
when it is used as an in-series booster water
heater for a solar water heater.
maximum thermostat
setting
maximum
recommended supply
temperature to
bathrooms and
ensuites
minimum
recommended stored
water temperature

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 this 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.
Note: Where a temperature limiting device is fitted to the hot water pipe work
after a Rheem Stellar 330 stainless steel model, the dial of the water heater‟s
adjustable water mixing valve must be set on position „5‟. Refer to “Adjustable
Water Mixing Valve”on page 7.
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 26, a pressure limiting valve must be fitted. The
supply pressure should be greater than 350 kPa for true mains pressure
operation to be achieved.
PRECAUTIONS
Where damage to property can occur in the event of the water heater leaking,
the water heater must be installed in a safe tray. Construction, installation and
draining of a safe tray must comply with AS/NZS 3500.4 and all local codes
and regulatory authority requirements.
The water heater must be maintained in accordance with the Owner‟s Guide
and Installation Instructions. Refer to “Regular Care” on page 12.
If this water heater is to be used where an uninterrupted hot water supply is
necessary for your application or business you should ensure that you have
back up redundancy within the hot water system design. This should ensure
the continuity of hot water supply in the event that this water heater were to
become inoperable for any reason. We recommend you seek advice from your
plumber or specifier about your needs and building back up redundancy into
your hot water supply system.

ABOUT YOUR WATER HEATER
6
WARNING
This water heater is only intended to be operated by persons who have the
experience or the knowledge and the capabilities to do so. This water heater is
not intended to be operated by persons with reduced physical, sensory or
mental capabilities i.e. the infirm, or by children. Children should be supervised
to ensure they do not interfere with the water heater.
SAFETY
This water heater is supplied with a thermostat, an over-temperature cut-out, a
thermocouple and a combination temperature pressure relief valve. These
devices must not be tampered with or removed. The water heater must not be
operated unless each of these devices is fitted and is in working order.
Warning: For continued safety of this water heater it must be installed,
operated and maintained in accordance with the Owner‟s Guide and Installation
Instructions.
The Rheem warranty may not cover faults if relief valves or other safety
devices are tampered with or if the installation is not in accordance with
these instructions.
Do not store flammable or
combustible materials near the water
heater. Flammable liquids (such as
petrol), newspapers and similar articles
must be kept well away from the water
heater and the flue terminal.
Do not use aerosols, stain removers
and household chemicals near the
water heater whilst it is working. Gases
from some aerosol sprays, stain
removers and household chemicals
become corrosive when drawn into a
flame.
Do not store swimming pool chemicals, household cleaners, etc., near
the water heater.
Do not place anything on top of the water heater or in contact with the flue
terminal. Ensure the flue terminal is not obstructed in any way at any time.

ABOUT YOUR WATER HEATER
7
TEMPERATURE ADJUSTMENT
This water heater has two forms of water temperature adjustment:
A temperature dial on the gas control (thermostat) –this controls the water
temperature inside of the storage cylinder.
An adjustable water mixing valve –this controls the delivered water
temperature from the water heater.
Gas Control Temperature Dial
The temperature dial is on the gas control, located behind the access cover on
the lower front of the water heater.
The thermostat is adjustable up to
approximately 75°C. Each number represents
a temperature difference of approximately
10°C. When aligned with the temperature dial
position indicator on the gas control body, a
setting of mid way between „3‟ and „4‟ will
normally maintain the water temperature at
about 60°C.
To increase the water temperature to 75°C,
turn the gas control knob anticlockwise to a
setting of „5‟. Refer to “Hotter Water Increases
the Risk of Scald Injury” on page 5.
Adjustable Water Mixing Valve
The Rheem Stellar 330 stainless steel model has a user adjustable water
mixing valve. The adjustment dial is located on the left hand side of the water
heater, between the cold water inlet and hot water outlet connections.
The valve can be adjusted to increase or decrease the hot water temperature
delivered by the water heater by mixing cold water from the water supply with
hot water from the storage cylinder. This can allow hot water to be delivered
below 50°C whilst the stored water is maintained at or above 60°C.
Warning: This adjustable water mixing valve cannot be used as the
approved temperature limiting device, if one is required by regulations to be
installed into the hot water pipe work to the bathroom and ensuite or other
ablution areas.
Adjusting the dial of the adjustable water mixing valve to position „5‟ will allow
water to be delivered at the stored temperature of the water heater (no mixing
with cold water). Each number represents a temperature difference of
approximately 5°C, with an incremental increase of cold water mixing with the
hot water to reduce the delivered water temperature.
temperature dial position indicator

ABOUT YOUR WATER HEATER
8
Note: When a temperature limiting device is fitted to the hot water pipe work
downstream of a Rheem Stellar 330 stainless steel model or if the water heater
is installed as part of a circulated flow and return system, the dial of the water
heater‟s adjustable water mixing valve must be set on position „5‟.
Setting the Adjustable Dial
To set the adjustable dial:
1. Ensure the water in the storage
cylinder is at the thermostat‟s selected
temperature.
Turn on a hot tap and allow to run
until the burner comes on.
Turn off the hot tap and wait for
the burner to extinguish.
The water temperature is now up
to the thermostat setting.
2. Close the cold water isolation valve at
the inlet to the water heater.
Caution: The cold water supply to the water heater must be turned off and
pressure relieved from the water heater prior to adjusting the water mixing
valve. Damage can result to the valve if it is adjusted whilst subject to
mains pressure.
3. Either open a hot water tap or operate the easing lever on the temperature
pressure relief valve (refer to “Temperature Pressure Relief Valve” on
page 14) and let the water run until there is little or no flow. Close the tap
or lower the easing lever gently.
This will relieve the pressure in the system.
4. Insert a large flat bladed screwdriver into the slot on the adjustment dial
and rotate the dial anticlockwise to decrease or clockwise to increase the
delivered water temperature.
Each number represents a temperature difference of approximately 5°C.
5. Open the cold water isolation valve at the inlet to the water heater.
6. Open a hot water tap and let the water flow for two (2) to three (3) minutes.
7. Using a thermometer, measure the water temperature at the opened tap.
If the measured water temperature is as desired, the water mixing valve is
correctly set.
If the measured water temperature is not as expected, repeat steps 1 to 7
until the desired water temperature is obtained.
adjustment
dial

ABOUT YOUR WATER HEATER
9
Notes
If the adjustable water mixing valve is set on the lowest setting (position „1‟)
and the delivered water temperature is still too hot, then reduce the
thermostat setting on the gas control and wait twenty four (24) hours before
repeating the procedure above. Refer to “Gas Control Temperature Dial” on
page 7 for information on adjusting the thermostat setting.
The delivered water temperature should be checked periodically at a hot
water tap. The incoming cold water temperature can vary from summer to
winter. This change in cold water temperature will affect the delivered mixed
water temperature. The water mixing valve may require adjustment between
summer and winter or other seasons of the year.
Warning: Small changes to the adjustable water mixing valve setting can
lead to significant water temperature changes. Changing the valve‟s setting or
the water heater‟s thermostat setting will cause the water delivery temperature
to be altered. If either of these settings is altered, the water mixing valve
adjustment procedure must be repeated to ensure the delivered hot water
temperature is satisfactory.
PIEZO IGNITION
The “Piezo” push button igniter makes lighting
the pilot flame of your water heater very easy.
Simply follow the instructions on the label
attached to the back of the access door.
There is no need for matches to light the
water heater.
PILOT IGNITER
A permanent pilot flame burns to ignite the
main burner automatically. Heat from the pilot
is absorbed by the water.
GOING ON HOLIDAYS
If you plan to be away from home for one or two nights, we suggest you leave
the water heater turned on. However, if you plan to stay away more than a few
nights, the gas knob can be set to the red star “ ” (pilot) position (facing the
front) to conserve energy (refer to steps 1, 2 and 4 of “Close Down Procedure”
on page 43).
If it is necessary to turn off the water heater, refer to “To Turn Off The Water
Heater” on page 10.
Note: When turned back on from the red star “ ” (pilot) position or white dot
“” (off) position, the water heater may take up to an hour to reheat if the water
has lost temperature.

ABOUT YOUR WATER HEATER
10
TO TURN OFF THE WATER HEATER
If it is necessary to turn off the water heater:
Shut down the gas control (refer to “Close Down Procedure” on page 43).
Close the gas isolation valve at the inlet to the gas control.
Close the cold water isolation valve at the inlet to the water heater.
TO TURN ON THE WATER HEATER
Open the cold water isolation valve fully at the inlet to the water heater.
Open the gas isolation valve fully at the inlet to the gas control.
Light the water heater (refer to “Lighting the Water Heater” on page 40).
HOW DO I KNOW IF THE WATER HEATER IS INSTALLED CORRECTLY?
Installation requirements are shown on pages 23 to 30. The water heater must
be installed:
by a qualified person, and
in accordance with the installation instructions, and
in compliance with Standards AS/NZS 3500.4, AS 5601 or AS/NZS 5601.1,
as applicable under local regulations, and all local codes and regulatory
authority requirements.
VICTORIAN CUSTOMERS
Notice to Victorian Customers from the Victorian Plumbing Industry
Commission. This water heater must be installed by a licensed person as
required by the Victorian Building Act 1993.
Only a licensed person will give you a Compliance Certificate, showing that the
work complies with all the relevant Standards. Only a licensed person will have
insurance protecting their workmanship for six (6) years. Make sure you use a
licensed person to install this water heater and ask for your Compliance
Certificate.