Rheem Water Star Technical Document

This water heater must be installed and serviced by an authorised person.

Please leave this guide with the householder.

Owner’s Guide

and

Installation Instructions

Electric 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.

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.

CONTENTS

HOUSEHOLDER - We recommend you read pages 4 to 14.

The other pages are intended for the installer

but may be of interest

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

Regular Care ................................................................................8

Water Supplies...........................................................................10

Save A Service Call ...................................................................12

Installation..................................................................................15

Connections –Plumbing ..........................................................21

Connections –Electrical...........................................................25

Commissioning..........................................................................28

Draining The Water Heater .......................................................29

Warranty.....................................................................................31

ABOUT YOUR WATER HEATER

MODEL TYPE

The Rheem®Water Star water heater you have chosen can be installed indoor

or outdoor. The Water Star has been designed to be installed with a continuous

flow gas water heater.

Where the water heater is installed with a continuous flow gas water heater and

a hot tap is turned on, the Water Star commences to deliver hot water

immediately from its outlet. This continues until hot water from the continuous

flow water heater reaches the transfer valve in the Water Star water heater. At

this point the transfer valve commences to redirect and the hot water supplied

by the continuous flow water heater is diverted to the hot tap. This conserves

water as usable hot water is delivered to the tap faster.

The Water Star water heater must not be installed with a continuous flow

water heater that is rated to deliver temperatures not exceeding 50°C in

accordance with AS 3498.

Warning: Temperature controllers must not be fitted to a continuous flow

water heater when a Water Star water heater is installed because water at a

temperature much higher than the controller setting can be delivered.

Water is stored in a copper 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 16, a pressure limiting valve must

be fitted. The supply pressure should be

greater than 350 kPa for true mains

pressure operation to be achieved.

ABOUT YOUR WATER HEATER

HOW HOT SHOULD THE WATER BE?

The Water Star water heater features a

fixed setting thermostat, which heats the

water to a temperature of 70°C.

To meet the requirements of the National

Plumbing Standard the temperature of the

stored water must not be below 60°C.

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 Water Star 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 will expose 240 V wiring. It must

only be removed by an authorised or qualified person.

The water heater is fitted with a power supply cord and plug and must be

plugged into a weatherproof electrical outlet if installed outdoors. Take care not

to touch the power plug with wet hands.

minimum recommended

stored water temperature

Water Star thermostat

setting (not adjustable)

maximum recommended

supply temperature to

bathrooms and ensuites

ABOUT YOUR WATER HEATER

SAFETY

This water heater is supplied with a temperature limiting valve, 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 an authorised or

qualified person.

If the power supply cord or plug to the water heater is damaged, it must be

replaced by an authorised person in order to avoid a hazard. The power supply

cord and plug must be replaced with a genuine replacement part available from

Rheem. 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 warranty can become void if relief valves or other safety devices are

tampered with or if the installation is not in accordance with these

instructions.

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.

The thermostat on a Water Star has a fixed setting at 70°C. This cannot be

adjusted.

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.

Unplug the power supply cord from the power outlet.

Close the cold water isolation valve at the inlet to the water heater.

ABOUT YOUR WATER HEATER

TO TURN ON THE WATER HEATER

Open the cold water isolation valve fully on the cold water line to the water

heater.

If not already connected to the Water Star or to another power outlet, plug in

the power supply cord of the continuous flow water heater at the electrical

socket on the underside of the Water Star.

Plug in the power supply cord of the Water Star at the power outlet.

Note: Do not plug the three pin plug from the Water Star water heater into

the power outlet on the underside of this 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 the isolating

switch.

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

Installation requirements are shown on pages 15 to 19. The water heater must

be installed by an authorised person and the installation must comply with

National Standards AS/NZS 3500.4, AS/NZS 3000 and all local codes and

regulatory authority requirements. In New Zealand the installation must

conform with the New Zealand Building Code.

Warning: Temperature controllers must not be fitted to a continuous flow

water heater when a Water Star water heater is installed because water at a

temperature much higher than the controller setting can be delivered. If a Water

Star is installed to an existing continuous flow water heater installation, then all

controllers must be disconnected and removed.

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 cylinder and fittings. If

you are in a known harsh water area you must read page 10. If you are not

sure, have your water chemistry checked against the conditions described on

page 10.

HOW LONG WILL THE WATER HEATER LAST?

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

heater will provide. These include the water chemistry, the water pressure, the

water temperature (inlet and outlet) and the water usage pattern. However,

your water heater is supported by a comprehensive warranty (refer to page 32).

REGULAR CARE

TEMPERATURE PRESSURE RELIEF VALVE

This valve is near the top of the water

heater and is essential for its safe

operation. It is possible for the valve to

release a little water through the drain line

during each heating period. This occurs as

the water is heated and expands by

approximately 1/50 of its volume.

Continuous leakage of water from the valve

and its drain line may indicate a problem

with the water heater (refer to

“Temperature Pressure Relief Valve

Running” on page 13).

Warning: Never block the outlet of this

valve or its drain line for any reason.

The TPR valve connects to the top of the

cylinder and is located underneath the front

cover. The easing lever on the valve can

be accessed by removing the plastic cap

on the top of the water heater. Replace the

cap when the easing lever has been

operated.

Operate the easing lever on the

temperature pressure relief valve once

every six months. It is very important you

raise and lower the lever gently.

DANGER: Failure to do this may result

in the water heater cylinder failing, or under

certain circumstances, exploding.

If water does not flow freely from the drain line when the lever is lifted, then the

water heater should be checked by the Rheem Service or their nearest

Accredited Service Agent.

The temperature pressure relief valve should be checked for performance or

replaced at intervals not exceeding 5 years, or more frequently in areas where

there is a high incidence of water deposits (refer to “Water Supplies” on

page 10).

water

heater

drain

line

lift until water

flows from the

drain line –

lower gently

hot

water

outlet

REGULAR CARE

EXPANSION CONTROL VALVE

In many areas, including South Australia, Western Australia and scaling water

areas, an expansion control valve is fitted to the cold water line to the

continuous flow water heater. The expansion control valve may discharge a

small quantity of water from its drain line during the heating period instead of

the temperature pressure relief valve on the Water Star water heater.

Operate the easing lever on the expansion control valve once every six

months. It is very important you raise and lower the lever gently. The

expansion control valve should be checked for performance or replaced at

intervals not exceeding 5 years, or more frequently in areas where there is a

high incidence of water deposits.

WATER SUPPLIES

This water heater must be installed in accordance with this advice to be

covered by the warranty.

This water heater is manufactured to suit the water conditions of most public

reticulated water supplies. However, there are some known water chemistries

which can have detrimental effects on the water heater and its operation

and / or life expectancy. If you are unsure of your water chemistry, you may be

able to obtain information from your local water supply authority. This water

heater should only be connected to a water supply which complies with these

guidelines for the water heater warranty to apply.

Due to the nature of the water chemistry the copper cylinder is not covered by

the water heater warranty when this water heater is connected to the public

water supply in the Redlands Shire in Queensland.

SATURATION INDEX

The saturation index (SI) is used as a measure of the water’s corrosive or

scaling properties.

In a corrosive water supply, the water can attack copper parts and cause them

to fail.

Where the saturation index is less than –1.0, the water is very corrosive and

warranty does not apply to a copper cylinder in a Water Star water heater.

In a scaling water supply calcium carbonate is deposited out of the water onto

any hot metallic surface.

Where the saturation index exceeds +0.40, the water is very scaling. An

expansion control valve must be fitted on the cold water line after the non-

return valve to protect and for warranty to apply to the temperature pressure

relief valve and water heater cylinder.

Where the saturation index exceeds +0.80, warranty does not apply a copper

cylinder in a Water Star water heater or its heating unit.

Water which is scaling may be treated with a water softening device to reduce

the saturation index of the water.

Refer to the Saturation Index chart on page 11.

Refer to the cold water connection detail on page 22 for the position of the

expansion control valve.

This manual suits for next models

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