Rheem Stellar 50L 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

Stainless Steel

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 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.

CONTENTS

HOUSEHOLDER - We recommend you read pages 4 to 19.

The other pages are intended for the installer

but may be of interest

About Your Water Heater............................................................4

Maintenance Requirements ......................................................10

Water Supplies...........................................................................13

Save A Service Call ...................................................................17

Installation..................................................................................20

Connections –Plumbing ..........................................................29

Connections –Electrical...........................................................33

Commissioning..........................................................................35

Draining The Water Heater .......................................................36

Warranty .....................................................................................38

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 is a Stellar™model with a stainless

steel cylinder. Stellar stainless steel models are available with either a single

heating unit or with twin heating units (refer to “Single Element Model” on page 7

and “Twin Element Model” on page 7). The water heaters can be installed indoor

or outdoor if it does not have a supply cord and plug, or indoor only if it is has a

supply cord and plug.

The water in the cylinder is heated by the electric immersion heating unit. A

thermostat controls the temperature. Automatic safety controls are fitted to the

water heater to provide safe and efficient operation.

The water heater has a brass plug on one side of the tank. The plug blocks off

an alternative cold water connection point and is not to be tampered with or

removed.

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 22, 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 a

tradesperson adjustable thermostat,

which allows you to choose the most

suitable temperature for your hot water

needs. Refer to “Temperature

Adjustment” on page 6.

To meet the requirements of the National

Plumbing Standard the temperature of

the stored water must not be below 60°C.

maximum thermostat

setting 050 models

minimum thermostat

setting and minimum

recommended stored

water temperature.

top heating unit

thermostat setting on a

twin element model

(not adjustable)

maximum recommended

supply temperature to

bathrooms and ensuites

maximum thermostat

setting 080 to 315 models

ABOUT YOUR WATER HEATER

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 the 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.

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.

This water heater uses 240 V AC power for the electrically operated components.

The removal of the front cover(s) will expose 240 V wiring. It must only be

removed by a qualified person.

SAFETY

This water heater is supplied with a thermostat, an over-temperature cut-out, 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.

The operation of the over-temperature cut-out on the thermostat indicates a

possibly dangerous situation. If the over-temperature cut-out operates, it must

not be reset and the water heater must be serviced by a qualified person.

If the electrical conduit to the water heater is damaged, it must be replaced by a

qualified person in order to avoid a hazard. Phone Rheem Service or their

nearest Accredited Service Agent to arrange for an inspection.

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.

ABOUT YOUR WATER HEATER

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 “Maintenance Requirements”on page 10.

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.

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

This water heater features a tradesperson adjustable thermostat. This requires

a licensed tradesperson to make any temperature adjustments. The thermostat

(bottom thermostat on twin element models) has a maximum temperature setting

of 75°C (80°C for 050 models) and a minimum temperature setting of 60°C. The

top thermostat on a twin element model has a fixed setting of 60°C and cannot

be adjusted.

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.

ABOUT YOUR WATER HEATER

SINGLE ELEMENT MODEL

This type of water heater has one heating unit with its

own thermostat, located at the base of the water heater.

The heating unit can be connected to an Off-Peak

(overnight) or time controlled supply, Extended Off-Peak

(overnight and day) or Extended time controlled supply,

or a Continuous / Domestic electricity supply. The

thermostat is factory set to 65°C and is tradesperson

adjustable from 60°C to 75°C (80°C for 050 models).

Continuous electricity supply

This type of connection is suited to where the storage

capacity is less than the normal daily usage.

Off-Peak electricity supply

This type of connection will only allow heating to occur

during set hours. A volume of water sufficient for the

day’s total use is heated and stored. This type of

heating will be more economical due to reduced tariffs

by the electricity authority.

TWIN ELEMENT MODEL

This type of water heater has two heating units, each with its own thermostat.

One heating unit is at the base of the water heater and the other near the top.

The lower thermostat is factory set to 70°C and is tradesperson adjustable from

60°C to 75°C. The top thermostat has a fixed setting of 60°C.

Bottom heating unit

During normal operation this heating unit supplies all

the hot water.

Top heating unit (Booster)

This heating unit only operates during periods of high

demand to provide an additional supply of heated

water.

Electrical connection

The two heating units are wired for non-simultaneous

operation, so that only one heating unit can operate

at a time. The bottom heating unit is usually

connected to an Off-Peak (overnight) or time

controlled supply and the top heating unit to a

Continuous / Domestic electricity supply. Some

electricity suppliers allow both heating units to be

metered at the Off-Peak or controlled tariff.

NOTE: Power must be available to the top heating unit circuit at all times

for this water heater to operate as designed.

ABOUT YOUR WATER HEATER

TO TURN OFF THE WATER HEATER

If you plan to be away from home for only a few nights, we suggest you leave

the water heater switched on.

If it is necessary to turn off the water heater:

Switch off the electrical supply at the isolating switch to the water heater.

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 on the cold water line to the water

heater.

Switch on the electrical supply at the isolating switch to the water heater.

GOING ON HOLIDAY?

If you plan to be away from home for one or two nights, we suggest you leave

the water heater switched on. However, if you plan to stay away more than a few

nights, conserve energy by switching the water heater off at either the

switchboard or isolating switch (if one is installed).

Note: When the electrical supply is switched back on, the water heater will take

some time to reheat the water. Depending upon the power supply connection,

hot water may not be available until the next day.

HOW DO I KNOW IF THE WATER HEATER IS INSTALLED CORRECTLY?

Installation requirements are shown on pages 20 to 26. 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/NZS 3000 and all local

codes and regulatory authority requirements.

In New Zealand the installation must also conform to the New Zealand Building

Code.

ABOUT YOUR WATER HEATER

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 6 years. Make sure you use a

licensed person to install this water heater and ask for your Compliance

Certificate.

DOES THE WATER CHEMISTRY AFFECT THE WATER HEATER?

The water heater is suitable for most public water supplies, however some water

chemistries may have detrimental effects on the water heater, its components

and fittings. Refer to “Water Supplies” on page 13.

If you are in a known harsh water area or you are not sure of your water

chemistry, have your water checked against the conditions described on

pages 13 to 16.

HOW LONG WILL THE WATER HEATER LAST?

The water heater is supported by a manufacturer’s warranty (refer to page 38).

There are a number of factors that will affect the length of service the water

heater will provide. These include but are not limited to the water chemistry, the

water pressure, the water temperature (inlet and outlet) and the water usage

pattern. Refer to “Precautions” on page 6.

MAINTENANCE REQUIREMENTS

MAJOR SERVICE EVERY FIVE YEARS

It is recommended a major service be conducted on the water heater every

five (5) years.

Warning: Servicing of a water heater must only be carried out by qualified

personnel. Phone Rheem Service or their nearest Accredited Service Agent.

Note: The major service and routine replacement of any components, such as

the relief valve(s), are not included in the Rheem warranty. A charge will be made

for this work. Only genuine replacement parts should be used on this water

heater.

The major service includes the following actions:

Replace the temperature pressure relief valve.

Inspect and flush the expansion control valve (if fitted). If required, replace

the valve.

Check the electric heating unit for excessive calcium build up or corrosion

and replace if necessary.

Visually check the unit for any potential problems.

Inspect all connections.

Check the drain line from the safe tray (if one is installed) is not blocked.

Note: The water heater may need to be drained during this service. After the

completion of the service, the water heater will take some time to reheat the

water. Depending upon the power supply connection, hot water may not be

available until the next day.

This manual suits for next models

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