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.
3
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
4
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
5
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
6
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
7
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).
8
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
9
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.
10
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 nonreturn 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.
WATER SUPPLIES
11
-1.0
no warranty applies to a:
temperature pressure relief valve or a
water heater cylinder unless an
expansion control valve is fitted.
no warranty applies to a:
-copper cylinder
SATURATION INDEX (SI)
WATER STAR WATER HEATER
WITHIN WARRANTY
SPECIFICATION
SATURATION INDEX
(calculated @ 80°C water temperature)
no warranty applies to a:
-standard watts density heating unit
-copper cylinder
+0.4 +0.80
very corrosive very scaling
scaling
corrosive
CHANGE OF WATER SUPPLY
The changing or alternating from one water supply to another can have a
detrimental effect on the operation and / or life expectation of a water heater
cylinder, a temperature pressure relief valve and a heating unit.
Where there is a changeover from one water supply to another, e.g. a rainwater
tank supply, bore water supply, desalinated water supply, public reticulated
water supply or water brought in from another supply, then water chemistry
information should be sought from the supplier or it should be tested to ensure
the water supply meets the requirements given in these guidelines for warranty
to apply.
SUMMARY OF WATER CHEMISTRY ADVICE AFFECTING WARRANTY
The warranty of this water heater does not apply on the components listed
below if the water heater is connected at any time to a water supply with water
chemistry of:
Water Chemistry
Component
Saturation Index (SI) < -1.0
copper water heater cylinder
Saturation Index (SI) > +0.4
(if expansion control valve is not fitted)
copper water heater cylinder
temperature pressure relief valve
Saturation Index (SI) > +0.8
standard watts density heating unit
12
SAVE A SERVICE CALL
Check the items below before making a service call. You will be charged for
attending to any condition or fault that is not related to the manufacture or
failure of a part.
Refer also to “Save a Service Call” in the owner’s guide supplied with the
continuous flow water heater for additional information.
NOT ENOUGH HOT WATER (OR NO HOT WATER)
Is the electricity switched on?
Inspect the isolating switch at the water heater and ensure it is turned on.
Temperature pressure relief valve running
Is the relief valve discharging too much water?
Refer to “Temperature Pressure Relief Valve Running” on page 13.
WATER TEMPERATURE TOO HIGH
A Water Star has a fixed thermostat setting of 70°C. When a hot tap is turned
on, hot water delivered from the Water Star will be up to this temperature.
The water temperature will decrease to the outlet temperature setting of the
continuous flow water heater when the hot water from the continuous flow
water heater reaches the tap.
SAVE A SERVICE CALL
13
TEMPERATURE PRESSURE RELIEF VALVE RUNNING
Normal Operation
It is normal and desirable that this valve
allows a small quantity of water to escape
during the heating cycle. However, if it
discharges more than a couple of litres of
water in 24 hours from the Water Star, there
may be another problem.
Continuous dribble
Try gently raising the easing lever on the
relief valve for a few seconds (refer to
“Temperature Pressure Relief Valve” on
page 8). This may dislodge a small particle
of foreign matter and clear the fault.
Release the lever gently.
Steady flows for long period (often at
night)
This may indicate the mains water pressure
sometimes rises above the designed
pressure of the water heater. Ask your
installing plumber to fit a pressure limiting
valve.
Warning: Never replace the relief valve
with one of a higher pressure rating.
Heavy flows of hot water until water heater is cold - then stops until
water reheats
The water heater must be switched off at the isolating switch. Phone
Rheem Service or their nearest Accredited Service Agent to arrange for an
inspection.
EXPANSION CONTROL VALVE RUNNING
If an expansion control valve is fitted in the cold water line to the continuous
flow water heater (refer to page 22) it may discharge a small quantity of water
instead of the temperature pressure relief valve on the water heater. The
benefit is that energy is conserved as the discharged water is cooler.
SAVE A SERVICE CALL
14
HIGHER THAN EXPECTED ELECTRICITY BILLS
Should you at any time, feel your electricity account is higher than expected,
we suggest you check the following points:
Is the relief valve running excessively?
Refer to “Temperature Pressure Relief
Valve Running” on page 13.
Are you using more hot water than you
think?
Refer to “Not Enough Hot Water” on
page 12.
Is there a leaking hot water pipe,
dripping hot water tap, etc?
Even a small leak will waste a
surprising quantity of hot water and
electricity. Replace faulty tap washers,
and have your plumber rectify any
leaking pipe work.
Has there been an increase in hot water usage?
An increase in hot water usage will result in an increase in water heater
operation.
Has your tariff rate been increased by your electricity retailer since your
previous account?
IF YOU HAVE CHECKED ALL THE FOREGOING AND STILL BELIEVE YOU
NEED ASSISTANCE, CALL RHEEM SERVICE OR THEIR NEAREST
ACCREDITED SERVICE AGENT.
15
INSTALLATION
THIS WATER HEATER IS NOT SUITABLE FOR POOL HEATING
The Water Star has been designed to be installed with a continuous flow gas
water heater.
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. If a Water
Star is installed to an existing continuous flow water heater installation, then all
controllers must be disconnected and removed.
The installation must comply with the requirements of 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.
All packaging materials must be removed from the water heater prior to its
installation.
WATER HEATER LOCATION
This water heater is suitable for either outdoor or indoor installation. Whether
located outdoor or indoor, the Water Star should be installed as close as
practicable to the continuous flow water heater and its position chosen with
safety and service in mind.
The maximum allowable length of pipe work between the Water Star and the
continuous flow water heater is:
5 metres of DN20 pipe, or
10 metres of DN15 pipe
Clearance must be allowed for servicing of the water heater. The water heater
must be accessible without the use of a ladder or scaffold. Make sure the cover
over the temperature pressure relief valve lever is accessible and the front
cover, thermostat, heating unit and temperature limiting valve can be removed
for service. You must be able to read the information on the rating plate.
Remember you may have to take the entire water heater out later for servicing.
A clear distance of at least 200 mm must be left either side of the water heater
to allow the removal of the screws securing the front cover.
INSTALLATION
16
This water heater must be installed vertically upright with the water and power
connections on the underside, pointing toward the ground or floor. The back of
the water heater can be either against a wall or supported by a frame. The
water heater must be secured to the wall or frame using suitable mounting
screws.
It is recommended to use one mounting screw at the top to firstly locate the
water heater on the wall or frame and then two at the bottom to secure the
water heater (refer to page 20 for mounting hole positions).
Remember all local authorities have regulations about putting water heaters
into roof spaces.
SAFE TRAY
It is a requirement of AS/NZS 3500.4 that for a new installation, a water heater
be installed on or over a safe tray where in the event of a leak, property may
otherwise be damaged. Construction, installation and draining of a safe tray
must comply with the abovementioned Standard.
MAINS WATER SUPPLY
Where the mains water supply pressure exceeds that shown in the table below,
an approved pressure limiting valve is required and should be fitted as shown
in the installation diagram (refer to diagram on page 22).
Model
004
Relief valve setting
1000 kPa
Expansion control valve setting*
850 kPa
Max. mains supply pressure
With expansion control valve
650 kPa
Without expansion control valve
800 kPa
* Expansion control valve not supplied with water heater
TANK WATER SUPPLY
Although the Water Star water heater does not have a minimum water supply
pressure requirement, generally a continuous flow water heater does.
If the water heater is supplied with water from a tank supply and a minimum
water supply pressure of 140 kPa at the continuous flow water heater cannot
be achieved, then a pressure pump system must be installed to allow the
continuous flow water heater to achieve its rated flow and performance. Care
must be taken to avoid air locks. The cold water line from the supply tank
should be adequately sized and fitted with a full flow gate valve or ball valve.
INSTALLATION
17
HOT WATER DELIVERY
This water heater can deliver water at temperatures which can cause scalding.
It is necessary and we recommend that a temperature limiting device be fitted
between a Water Star water heater and the hot water outlets in any ablution
area such as a bathroom or ensuite, to reduce the risk of scalding. The
installing plumber may have a legal obligation to ensure the installation of this
water heater meets the delivery water temperature requirements of
AS/NZS 3500.4 so that scalding water temperatures are not delivered to a
bathroom, ensuite or other ablution area.
Where the Water Star is installed with a continuous flow water heater and a
temperature limiting device is installed adjacent to the water heater, the cold
water line to the temperature limiting device must be branched off the cold
water line before the continuous flow water heater. It can be either before or
after the isolation valve, pressure limiting valve and non return valve (if an ECV
is installed) to the continuous flow water heater. If an expansion control valve is
required, it must always be installed after the non return valve and be the last
valve prior to the continuous flow water heater.
Two Temperature Zones Using a Temperature Limiting Device
Water Star with Continuous Flow Water Heater – without an ECV
If a pressure limiting valve is installed on the cold water line to the water heater
and the cold water line to a temperature limiting device branches off before this
valve or from another cold water line in the premises, then a pressure limiting
valve of an equal pressure setting may be required prior to the temperature
limiting device.
INSTALLATION
18
Two Temperature Zones Using a Temperature Limiting Device
Water Star with Continuous Flow Water Heater – with an ECV
REDUCING HEAT LOSSES
The cold water line to and the hot water line from the water heater must be
insulated in accordance with the requirements of AS/NZS 3500.4. The
insulation must be weatherproof and UV resistant if exposed.
SATURATION INDEX
The copper cylinder of this water heater is only covered by warranty where the
saturation index (SI) of the water is greater than -1.0 and less than +0.4, or less
than +0.8 when an expansion control valve is used. The use of this water
heater with water outside of these guidelines may shorten the life of the water
heater cylinder and will void the cylinder warranty.
Refer to “Water Supplies” on page 10 and the Saturation Index chart on
page 11.
TECHNICAL DATA
Model
W8100401
W81004C1
Storage capacity
Litres
4
Thermostat setting
°C
70
Weight empty
kg
12.5
Technical date is subject to change.
INSTALLATION
19
TYPICAL INSTALLATION – OUTDOOR LOCATION
TYPICAL INSTALLATION
Water Star – with a Continuous Flow Water Heater
INSTALLATION
20
DIMENSIONS
352
653 624
565
85
653
10
35
59
191
74
140
142
52
192
35
59
TPR VALVE
DRAIN
OUTLET
POWER
OUTLET
WATER
INLET
HOT
WATER
OUTLET
POWER
OUTLET
TPR VALVE
DRAIN
OUTLET
WATER
INLET
HOT
WATER
OUTLET
633
565
130
21
CONNECTIONS – PLUMBING
CONNECTION SIZES
Hot water connection:
R ¾/20
Cold water connection:
R ¾/20
Relief valve connection:
R ½/15
All plumbing work must be carried out by a qualified person and in accordance
with the Plumbing Standard AS/NZS 3500.4 and local authority requirements.
WATER INLET AND OUTLET
All pipe work must be cleared of foreign matter before connection and purged
before attempting to operate the water heater. All olive compression fittings
must use brass or copper olives. Use thread sealing tape or approved thread
sealant on all fittings.
This water heater may have two plastic
caps, one fitted to each of the water
inlet and hot water outlet. If so, these
caps must be removed prior to the
connection of the fittings and pipe work
to the water heater.
A disconnection union must always be
provided at the water inlet and hot
water outlet on the water heater to
allow for disconnection of the water
heater.
CONNECTIONS – PLUMBING
22
A full flow isolation valve, such as a gate valve or ball valve, must be installed
on the water line from the continuous flow gas water heater to the Water Star
water heater.
If there is no expansion control valve installed, then the non return valve must
be installed between the continuous flow and Water Star water heaters. An
acceptable arrangement is shown in the diagram
Water Star with Continuous Flow Water Heater
Water Connections – without ECV
If an expansion control valve is installed, then this must be installed before the
continuous flow water heater. The non return valve must be installed before the
ECV and MUST NOT be installed between the continuous flow and Water Star
water heaters. An acceptable arrangement is shown in the diagram.
Water Star with Continuous Flow Water Heater
Water Connections – with ECV
Refer also to “Hot Water Delivery” on page 17 and to “Mains Water Supply” on
page 16.
CONNECTIONS – PLUMBING
23
PIPE SIZES
The pipe sizing for hot water supply systems should be carried out by persons
competent to do so, choosing the most suitable pipe size to ensure adequate
flow for each individual application. Reference to the technical specifications of
the water heater and local regulatory authority requirements must be made.
To achieve true mains pressure operation, the cold water line to the water
heater should be the same size or bigger than the hot water line from the water
heater.
The minimum recommended water supply pipe and hot pipe size is DN20 when
the Water Star is installed with a continuous flow water heater.
TEMPERATURE PRESSURE RELIEF VALVE
The temperature pressure relief valve is supplied installed in position at the top
of the water heater cylinder, underneath the jacket. The valve can be accessed
by removing the plastic cover from the top of the water heater.
A copper drain line must be fitted to the temperature pressure relief valve (refer
to "Relief Valve Drain" on page 24). The drain line connects to the underside of
the water heater.
EXPANSION CONTROL VALVE
Local regulations may make it mandatory to install an expansion control valve
(ECV) in the cold water line to the water heater. In other areas, an ECV is
required if the saturation index is greater than +0.4 (refer to “Water Supplies”
on page 10).
The expansion control valve must always be installed after the non return valve
and be the last valve installed prior to the water heater (refer to diagram on
page 22). A copper drain line must be fitted to the expansion control valve
(refer to "Relief Valve Drain" on page 24).
The valve must be insulated with closed cell polymer insulation or similar
(minimum thickness 9 mm) and the insulation installed so as not to impede the
operation of the valve. The insulation must be weatherproof and UV resistant if
exposed.
CONNECTIONS – PLUMBING
24
RELIEF VALVE DRAIN
DN15 copper drain lines must be fitted to the temperature pressure relief valve
and expansion control valve (if one is installed) to carry the discharge clear of
the water heater. Connect the drain lines to the valves using disconnection
unions. The drain line from the valve to the point of discharge should be as
short as possible, have a continuous fall all the way from the water heater to
the discharge outlet and have no tap, valves or other restrictions in the pipe
work. A drain line from a relief valve must comply with the requirements of
AS/NZS 3500.4.
A drain line must be no longer than 9 metres with no more than three bends
greater than 45° before discharging at an outlet or air break. The maximum
length of 9 metres for a drain line is reduced by 1 metre for each additional
bend required of greater than 45°, up to a maximum of three additional bends.
Where the distance to the point of final discharge exceeds this length, the drain
line can discharge into a tundish.
Subject to local regulatory authority approval, the drain lines from the
temperature pressure relief valve and expansion control valve from an
individual water heater may be interconnected.
The outlet of a drain line must be in such a position that flow out of the pipe can
be easily seen, but arranged so discharge will not cause injury, damage or
nuisance. The termination point of a drain line must comply with the
requirements of AS/NZS 3500.4. Drain lines must not discharge into a safe
tray.
In locations where water pipes are prone to freezing, drain lines must be
insulated, must not exceed 300 mm in length and are to discharge into a
tundish through an air gap of between 75 mm and 150 mm.
If a drain line discharges into a tundish, the drain line from the tundish must be
not less than DN20. The drain line from a tundish must meet the same
requirements as for a drain line from a relief valve.
Warning: As the function of the temperature pressure relief valve on this water
heater is to discharge high temperature water under certain conditions, it is
strongly recommended the pipe work downstream of the relief valve be capable
of carrying water exceeding 93°C. Failure to observe this precaution may result
in damage to pipe work and property.
25
CONNECTIONS – ELECTRICAL
The power supply to the water heater must not be switched on until the
water heater is filled with water and a satisfactory megger reading is
obtained.
All electrical work and permanent wiring must be carried out by a qualified
person and in accordance with the Standards Australia Wiring Rules
AS/NZS 3000 and local authority requirements.
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.
WATER HEATER
The water heater, supplied with a 1.5 metre power cord, requires a 240 V
50 Hz general purpose outlet (GPO) rated at 10 A, to be located within
1.0 metre of the installation. The GPO must have a continuous power supply.
The GPO is required to be weatherproof if installed outdoors.
The Water Star water heater has an electrical three pin socket located on its
underside, behind the spring loaded socket cover. The cover opens from the
rear to the front of the water heater. This is for the power plug from the
continuous flow water heater. This socket allows for an additional loading of up
to 1200 watts from the continuous flow water heater.
Therefore only one GPO is required for the power supply to both the Water Star
and continuous flow water heater. The GPO is for the Water Star water heater.
A saddle clip is provided on the
underside of the Water Star to secure
the power cord from the continuous
flow water heater. This will reduce the
risk of the plug being pulled
unintentionally from the socket.
Loosen the screw holding the plastic
saddle clip in position. Position the
cord from the continuous flow water
heater in the saddle clip and tighten
the screw. Ensure there is sufficient
movement in the power cord to enable
it to be plugged and unplugged.
CONNECTIONS – ELECTRICAL
26
The circuit to which the GPO is connected must be able to take the load of both
the Water Star water heater and the continuous flow water heater plus other
devices which may be drawing their power from it.
Refer to the literature supplied with the continuous flow water heater for
information on the power consumption and power supply requirements for that
water heater. Rheem and Vulcan continuous flow water heaters have a
maximum power consumption, when the anti-frost device is active, of up to
approximately 160 watts.
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.
The power consumption of the Water Star water heater is:
Component
Power
consumption
Comments
Heating unit
800 Watts
Load when heating unit is operating
The continuous flow water heater will only operate on a sine wave at 50 Hz.
Devices generating a square wave cannot be used to supply power to that type
of water heater.
THERMOSTAT SETTING
The thermostat on a Water Star has a fixed setting at 70°C. This cannot be
adjusted.
CONNECTIONS – ELECTRICAL
27
WIRING DIAGRAM
ELEMENT
THERMOSTAT
CLAMP
POWER
SOCKET
EARTH
STUD
3 PIN PLUG
& LEAD
A N
E
BROWN
BLUE
GREEN/YELLOW
GREEN/YELLOW
RED
RED
BLUE
BROWN
GREEN/YELLOW
THERMOSTAT
Wiring Diagram
Water Star Water Heater – Robertshaw “ST” Thermostat
28
COMMISSIONING
TO FILL AND TURN ON THE WATER HEATER
The power supply to the water heater must not be switched on until the
water heater is filled with water and a satisfactory megger reading is
obtained.
Open all of the hot water taps in the house (don’t forget the shower).
Open the cold water isolation valve fully on the cold water line to the water
heater.
Air will be forced out of the taps.
Close each tap as water flows freely from it.
Check the pipe work for leaks.
Plug in the power supply cord of the continuous flow water heater at the
electrical socket on the underside of the Water Star.
Secure the power supply of the continuous flow water heater with the
saddle clip on the underside of the Water Star (refer to “Water Heater” on
page 25).
Plug in the power supply cord of the Water Star at the power outlet.
Switch on the electrical supply at the isolating switch to the water heater.
Explain to the householder or a responsible officer the functions and operation
of the water heater. Upon completion of the installation and commissioning of
the water heater, leave this guide with the householder or a responsible officer.
TO TURN OFF THE WATER HEATER
If it is necessary to turn off the water heater on completion of the installation,
such as on a building site or where the premises is vacant, then;
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.
29
DRAINING THE WATER HEATER
To drain the water heater:
Turn off the water heater (refer to “To Turn Off The Water Heater” on
page 28).
Close all hot water taps.
Remove the plastic cap on the top surface of the water heater.
This exposes the temperature pressure relief valve.
Operate the relief valve release lever - do not let the lever snap back or you
will damage the valve seat.
Operating the lever will release the pressure in the water heater.
Undo the union at the cold water inlet to the water heater and attach a hose
to the water heater side of the union.
Let the other end of the hose go to a drain.
Operate the relief valve again.
This will let air into the water heater and allow the water to drain through the
hose.
This will enable the water to be drained from the water heater, down to the level
of the water inlet connection of the Water Star cylinder.
30
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31
RHEEM WATER STAR WATER HEATER
WARRANTY - AUSTRALIA ONLY
WATER STAR W8100401, W81004C1 MODELS
WARRANTY CONDITIONS
1. This warranty is applicable only to water heaters
manufactured from 1st July 2010.
2. The water heater must be installed in accordance
with the water heater installation instructions,
supplied with the water heater, and in accordance
with all relevant statutory and local requirements of
the State in which the water heater is installed.
3. Where a failed component, cylinder or water heater
is replaced under warranty, the balance of the
original warranty period will remain effective. The
replaced component, cylinder or water heater does
not carry a new warranty.
4. Where the water heater is installed outside the
boundaries of a metropolitan area as defined by
Rheem or further than 25 km from a regional
Rheem branch office, or an Accredited Service
Agent, the cost of transport, insurance and
travelling costs between the nearest Rheem
Accredited Service Agent’s premises and the
installed site shall be the owner’s responsibility.
5. Where the water heater is installed in a position
that does not allow safe, ready access, the cost of
accessing the site safely, including the cost of
additional materials handling and / or safety
equipment, shall be the owner’s responsibility.
6. The warranty only applies to the water heater and
original or genuine (company) component
replacement parts and therefore does not cover
any plumbing or electrical parts supplied by the
installer and not an integral part of the water heater,
e.g. pressure limiting valve; isolation valves; nonreturn valves; electrical switches; pumps or fuse.
7. The water heater must be sized to supply the hot
water demand in accordance with the guidelines in
the water heater literature.
WARRANTY EXCLUSIONS
1. REPAIR AND REPLACEMENT WORK WILL BE CARRIED OUT AS SET OUT IN THE WATER HEATER
WARRANTY, HOWEVER THE FOLLOWING EXCLUSIONS MAY CAUSE THE WATER HEATER
WARRANTY TO BECOME VOID AND MAY INCUR A SERVICE CHARGE AND / OR COST OF PARTS.
a) Accidental damage to the water heater or any
component, including: Acts of God; failure due to
misuse; incorrect installation; attempts to repair the
water heater other than by a Rheem Accredited
Service Agent or Rheem Service.
b) Where it is found there is nothing wrong with the
water heater; where the complaint is related to
excessive discharge from the temperature and / or
pressure relief valve due to high water pressure;
where there is no flow of hot water due to faulty
plumbing; where water leaks are related to
plumbing and not the water heater or water heater
components; where there is a failure of electricity or
water supplies; where the supply of electricity or
water does not comply with relevant codes or acts.
c) Where the water heater or water heater component
has failed directly or indirectly as a result of:
excessive water pressure; excessive temperature
and / or thermal input; blocked overflow / vent
drain; corrosive atmosphere; ice formation in the
pipe work to or from the water heater.
d) Where the water heater is located in a position that
does not comply with the water heater installation
instructions or relevant statutory requirements,
causing the need for major dismantling or removal
of cupboards, doors or walls, or use of special
equipment to bring the water heater to floor or
ground level or to a serviceable position.
e) Where the water heater has been connected at any
time to a water supply that does not comply with
the water supply guidelines as outlined in the
Owner’s Guide and Installation Instructions.
2. SUBJECT TO ANY STATUTORY PROVISIONS TO THE CONTRARY, THIS WARRANTY EXCLUDES ANY
AND ALL CLAIMS FOR DAMAGE TO FURNITURE, CARPETS, WALLS, FOUNDATIONS OR ANY OTHER
CONSEQUENTIAL LOSS EITHER DIRECTLY OR INDIRECTLY DUE TO LEAKAGE FROM THE WATER
HEATER, OR DUE TO LEAKAGE FROM FITTINGS AND / OR PIPE WORK OF METAL, PLASTIC OR
OTHER MATERIALS CAUSED BY WATER TEMPERATURE, WORKMANSHIP OR OTHER MODES OF
FAILURE.
RHEEM WATER STAR WATER HEATER
WARRANTY - AUSTRALIA ONLY
Revision Date: 2010 July 122140C
32
WARRANTY – WATER STAR W8100401, W81004C1 MODELS
Rheem will repair or replace, at Rheem’s sole discretion and subject to the warranty conditions
and exclusions, any component or the cylinder if it fails within the warranty period below.
Installation
Period
Warranty
All Components (from date of installation)
All installations
Year
1
New component or cylinder, free of charge, including
labour.**
Cylinder (from date of installation)
Water heater installed in a
“single-family domestic
dwelling”
Years
2 & 3
New cylinder, free of charge, including labour.**
Years
4 & 5
New cylinder, free of charge, with installation and labour
costs being the responsibility of the owner.
Water heater installed in
any other than a
“single-family domestic
dwelling”
Years
2 & 3
New cylinder, free of charge, with installation and labour
costs being the responsibility of the owner.
Note:
** Refer to items 4 and 5 of warranty conditions.
Rheem reserves the right to transfer fully functional components from the defective cylinder to
the replacement cylinder if required.
In addition to this warranty, the Trade Practices Act 1974 and similar laws in each state and
territory provide the owner under certain circumstances with certain minimum statutory rights in
relation to your Rheem water heater. This warranty must be read subject to that legislation and
nothing in this warranty has the effect of excluding, restricting or modifying those rights.
RHEEM AUSTRALIA PTY LTD
A.B.N. 21 098 823 511
www.rheem.com.au
FOR SERVICE TELEPHONE
131 031 AUSTRALIA
0800 657 335 NEW ZEALAND
or refer local Yellow Pages
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