Owner’s Guide
and
Installation Instructions
Electric Domestic
Water Heater
This water heater must be installed and serviced by a qualified person.
Please leave this guide with the householder.
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.
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
Maintenance Requirements ......................................................10
Water Supplies ...........................................................................14
Save A Service Call ...................................................................18
Installation ..................................................................................21
Connections – Plumbing ..........................................................32
Connections – Electrical ...........................................................37
Commissioning ..........................................................................39
Draining The Water Heater .......................................................42
Warranty .....................................................................................45
3
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 ® or
RheemPlus™ model.
Rheemglas 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.
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.
Depending on the model of water heater, it may have caps or brass plugs on one
side of the tank. The plugs and caps block off alternative connection points and
are not to be tampered with or removed.
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.
4
maximum thermostat setting
050 models
maximum thermostat setting
Rheemglas and RheemPlus
(025, 080 to 315 models)
minimum thermostat setting
and minimum recommended
stored water temperature.
top heating unit thermostat
setting on a twin element
model (not adjustable)
RheemPlus maximum delivery
temperature.
maximum recommended
supply temperature to
bathrooms and ensuites
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 a Rheemglas 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 need to fit a temperature limiting device
to satisfy the requirements of AS/NZS 3500.4, if a RheemPlus water heater is
installed in an application where 50°C is the maximum permissible hot water
temperature at the outlet of a sanitary fixture used primarily for personal hygiene
purposes.
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
A Rheemglas or RheemPlus 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 70°C (75°C for 050 models) and a minimum
temperature setting is 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.
A RheemPlus water heater is temperature limited to 50°C at the hot water outlet.
The minimum thermostat setting should be 65°C to assist in the specified
operation of its temperature limiting device. Increasing the thermostat setting will
not increase the outlet temperature but will provide more hot water capacity.
5
ABOUT YOUR WATER HEATER
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.
Take care not to touch the power plug on a water heater fitted with a power
supply cord and plug with wet hands.
SAFETY
This water heater is supplied with a thermostat, an over-temperature cut-out, and
a combination temperature pressure relief valve. In addition, a RheemPlus water
heater has a temperature limiting 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 power supply cord, plug or electrical conduit to the water heater is
damaged, it must be replaced by a qualified 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 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.
6
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.

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.

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 nonsimultaneous 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 supply.
Some electricity suppliers allow both
heating units to be metered at the OffPeak 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.
7
ABOUT YOUR WATER HEATER
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 23, 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 “Maintenance Requirements” on page 10 and
to “Anode Inspection and Replacement” on page 15.
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.
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 (power supply cord
model only).

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.

Plug in the power supply cord at the power outlet (power supply cord model
only).

Switch on the electrical supply at the isolating switch to the water heater.
8
ABOUT YOUR 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 21 to 28. 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.
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 14.
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 14 to 17.
HOW LONG WILL THE WATER HEATER LAST?
The water heater is supported by a manufacturer’s warranty (refer to page 45).
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 8.
9
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 anode and 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 limiting valve (RheemPlus model).

Replace the temperature pressure relief valve.

Inspect and flush the expansion control valve (if fitted). If required, replace
the valve.

Inspect and if required, replace the anode.
If the anode is not replaced, it should be replaced within three (3) years of
this service (refer to “Anode Inspection and Replacement” on page 15).

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.
10
MAINTENANCE REQUIREMENTS
MINOR MAINTENANCE EVERY SIX MONTHS
It is recommended minor maintenance be performed every six (6) months. Minor
maintenance can be performed by the dwelling occupant.
The minor maintenance includes:

Operate the easing lever on the temperature pressure relief valve. It is very
important you raise and lower the lever gently. Refer to “Temperature
Pressure Relief Valve” on page 12.
Warning: Exercise care to avoid any splashing of water, as water
discharged from the drain line will be hot. Stand clear of the drain line’s point
of discharge when operating the valve’s lever.

Operate the easing lever on the expansion control valve (if fitted). It is very
important you raise and lower the lever gently. Refer to “Expansion Control
Valve” on page 11.

Check the performance of the temperature limiting valve (RheemPlus model).
Measure the water temperature from the hot tap nearest to the water heater
with a thermometer. If the water temperature exceeds 50°C, phone Rheem
Service or their nearest Accredited Service Agent to arrange for an
inspection. Refer to “Temperature Limiting Valve” on page 13.

Check the drain line from the safe tray (if one is installed) is not blocked.
EXPANSION CONTROL VALVE
In many areas, including South Australia, Western Australia and scaling water
areas, it is mandatory an expansion control valve is fitted to the cold water line
to the 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 heater.
Operate the easing lever on the expansion control valve once every six months.
Refer to “Minor Maintenance Every Six Months” on page 11. It is very important
the lever is raised and lowered gently. If water does not flow freely from the
drain line when the lever is lifted, then the water heater should be checked by
Rheem Service or their nearest Accredited Service Agent. The expansion control
valve should be checked for performance or replaced at intervals not exceeding
five (5) years, or more frequently in areas where there is a high incidence of
water deposits.
11
MAINTENANCE REQUIREMENTS
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 19).
Warning: Never block the outlet of this
valve or its drain line for any reason.
Operate the easing lever on the temperature
pressure relief valve once every six (6)
months. Refer to “Minor Maintenance Every
Six Months” on page 11. It is very
important the lever is raised and lowered
gently.
water
heater
DANGER: Failure to do this may result
in the water heater cylinder failing, or under
certain circumstances, exploding.
Warning: Exercise care to avoid any
splashing of water, as water discharged
from the drain line will be hot. Stand clear of
the drain line’s point of discharge when
operating the valve’s lever.
lift until water
flows from the
drain line –
lower gently
drain
line
If water does not flow freely from the drain line when the lever is lifted, then the
water heater must be checked. Phone Rheem Service or their nearest Accredited
Service Agent to arrange for an inspection.
The temperature pressure relief valve should be replaced at intervals not
exceeding five (5) years, or more frequently in areas where there is a high
incidence of water deposits (refer to “Water Supplies” on page 14).
12
MAINTENANCE REQUIREMENTS
TEMPERATURE LIMITING VALVE
A RheemPlus water heater is fitted with a temperature limiting valve at the hot
water outlet. The valve is set to deliver water not exceeding 50°C.
The valve should be checked for performance every twelve (12) months. This
can be performed by measuring the water temperature from the hot tap nearest
to the water heater with a thermometer. If the water being delivered is at a
temperature exceeding 50°C, phone Rheem Service or their nearest Accredited
Service Agent to arrange for an inspection.
The valve must be replaced at intervals not exceeding five (5) years, or more
frequently in areas where there is a high incidence of water deposits (refer to
“Water Supplies” on page 14). Failure to do this may result in water at a
temperature up to 70°C being delivered at the hot tap, increasing the risk of scald
injury.
13
WATER SUPPLIES
This water heater must be installed in accordance with this advice to be
covered by the Rheem 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 Rheem warranty to apply.
ANODE
The vitreous enamel lined cylinder of the water heater is only covered by the
Rheem warranty when the total dissolved solids (TDS) content in the water is
less than 2500 mg/L and when the correct colour coded anode is used. If an
incorrect colour coded anode is used in the water heater, any resultant faults will
not be covered by the Rheem warranty. In addition, the use of an incorrect colour
coded anode may shorten the life of the water heater cylinder.
The correct colour coded anode must be selected and fitted to the water heater
in accordance with the following advice and the Anode Selection chart on
page 15 for the Rheem warranty to apply to the water heater cylinder.
Total Dissolved Solids
Anode colour code
0 – 40 mg/L
Green
40 – 150 mg/L
Green or Black
150 – 400 mg/L
Black
400 – 600 mg/L
Black or Blue
600 – 2500 mg/L
Blue
2500 mg/L +
Blue (no cylinder warranty)
The changing of an anode must be carried out by a qualified person.
Note: Some water analysis reports may state the conductivity of the water rather
than the level of total dissolved solids. Conductivity, measured in microsiemens
per centimetre (µS / cm), is directly proportional to the TDS content of the water.
TDS, in mg / L, is approximately 70% of the conductivity in µS / cm.
14
WATER SUPPLIES
40
(60)
150
(215)
400
(570)
600
(860)
TOTAL DISSOLVED SOLIDS (TDS) mg/L
(CONDUCTIVITY - μS/cm)
2500
(3570)
Green
Black
Blue
Warranty applies to a vitreous-enamel-lined
water heater cylinder if the correct coloured
anode is used for the TDS of the water
Blue
Above 2500 mg/L,
no warranty applies
to a vitreousenamel-lined water
heater cylinder
ANODE SELECTION
ANODE INSPECTION AND REPLACEMENT
The anode installed in your water heater will slowly dissipate whilst protecting
the cylinder. The life of the cylinder may be extended by replacing the anode.
For water supplies which are either softened or desalinated, or where the water
supply may alternate between a water tank and a reticulated public supply or
another supply, or where there is a variable supply (e.g. from a bore or public
reticulated supply from various water sources), the anode must be inspected
(and replaced if there is any sign of depletion) within 5 years of its installation.
For all water supplies, if the anode is not replaced during a major service (refer
to “Major Service Every Five Years” on page 10) then the maximum time after
installation when the anode should be replaced for this electric water heater is
8 years.
CAUTION
If the water supply has a TDS greater than 150 mg/L and a green anode has not
been changed to a black anode, or if the TDS is greater than 600 mg/L and the
anode has not been changed to a blue anode, there is the possibility the anode
may become overactive and hydrogen gas could accumulate in the top of the
water heater during long periods of no use.
If, under these conditions, the water heater has not been used for two or more
weeks the following procedure should be carried out before using any electrical
appliances (automatic washing machines and dishwashers) which are
connected to the hot water supply.
The hydrogen, which is highly flammable, should be vented safely by opening a
hot tap and allowing the water to flow. There should be no smoking or naked
flame near the tap whilst it is turned on. Any hydrogen gas will be dissipated.
This is indicated by an unusual spurting of the water from the tap. Once the water
runs freely, any hydrogen in the system will have been released.
15
WATER SUPPLIES
SATURATION INDEX
The saturation index is used as a measure of the water’s corrosive or scaling
properties. The saturation index figures stated are calculated using a water
temperature of 80°C.
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 the Rheem warranty does not apply to a copper sheathed heating unit. A
corrosion resistant heating unit must be used for the Rheem warranty to apply to
the heating unit.
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 the Rheem warranty to apply to the
temperature pressure relief valve and water heater cylinder.
Where the saturation index exceeds +0.80, the Rheem warranty does not apply
to a standard watts density heating unit. A low watts density heating unit must be
used for the Rheem warranty to apply to the 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 16. Refer to the cold water
connection detail on page 32 for the position of the expansion control valve.
Contact Rheem Service or their nearest Accredited Service Agent if a
replacement heating unit is required.
WITHIN WARRANTY
SPECIFICATION
-1.0
0
+0.4
no warranty applies to a:
-standard watts density heating unit
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 sheathed heating unit
SATURATION INDEX (SI)
ELECTRIC WATER HEATERS
+0.8
SATURATION INDEX
(calculated @ 80°C water temperature)
very corrosive
scaling
corrosive
16
very scaling
WATER SUPPLIES
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 the Rheem warranty
to apply.
SUMMARY OF WATER CHEMISTRY ADVICE AFFECTING WARRANTY
The water heater and its components are not suitable for certain water
chemistries. Those chemistries are listed below. If the water heater is connected
at any time to a water supply with the following water chemistry, the Rheem
warranty will not cover any resultant faults on the components listed below:
Water Chemistry
Component
Total Dissolved Solids (TDS) > 2500 mg/L
water heater cylinder
Total Dissolved Solids (TDS)
not suitable for anode type
water heater cylinder
Saturation Index (SI) < -1.0
copper sheathed heating unit
Saturation Index (SI) > +0.4
(if expansion control valve is not fitted)
water heater cylinder
temperature pressure relief valve
Saturation Index (SI) > +0.8
standard watts density heating unit
17
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.
NOT ENOUGH HOT WATER (OR NO HOT WATER)

Is the electricity switched on?
Inspect the isolating switch marked “HOT
WATER” or “WATER HEATER” at the
switchboard and the isolating switch (if one is
installed) near the water heater and ensure
they are turned on.
Note: Check the electricity supply to which
the water heater is connected. If on an OffPeak or time controlled electricity supply,
remember heating hours are restricted. Refer
to “Off-Peak Electricity Supply” on page 7.
Check the fuse marked “HOT WATER” or “WATER HEATER” at the
switchboard.

Twin element water heaters
A twin element non-simultaneous model must have power available to the top
heating unit circuit at all times for the water heater to operate as designed.

Are you using more hot water than you think?
Is one outlet (especially the shower) using more hot water than you think?
Very often it is not realised the amount of hot water used, particularly when
showering. Carefully review the family’s hot water usage. Have your plumber
fit a flow control valve to each shower outlet to reduce water usage.

Temperature pressure relief valve running
Is the relief valve discharging too much water? Refer to “Temperature
Pressure Relief Valve Running” on page 19.

Thermostat setting
Ensure the thermostat setting is appropriate. You may choose to have your
electrician check and adjust the thermostat upwards to gain additional hot
water capacity. Refer to “Temperature Adjustment” on page 5.
Warning: Hotter water increases the risk of scald injury.
A RheemPlus water heater is temperature limited to 50°C at the hot water
outlet. Increasing the thermostat setting will not increase the outlet
temperature but will provide more hot water capacity.
18
SAVE A SERVICE CALL

Water heater size
Do you have the correct size water heater for your requirements? The sizing
guide in the Rheem sales literature and on the Rheem website
(www.rheem.com.au) suggests average sizes that may be needed.
WATER TEMPERATURE TOO HIGH
A RheemPlus water heater is fitted with a temperature limiting valve set to deliver
water not exceeding 50°C. If the water is being delivered at a temperature
exceeding 50°C, phone Rheem Service or their nearest Accredited Service
Agent to arrange for an inspection. Care must be taken by all householders when
using hot water until the valve is serviced or replaced.
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 bucket full of water
in 24 hours, 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 12). 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 switchboard. Phone Rheem
Service or their nearest Accredited Service Agent to arrange for an
inspection.
19
SAVE A SERVICE CALL
EXPANSION CONTROL VALVE RUNNING
If an expansion control valve is fitted in the cold water line to the water heater
(refer to the cold water connection diagram on page 32) 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.
HIGHER THAN EXPECTED ELECTRICITY BILLS
Should you at any time, feel your electricity bill 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 19.

Is one outlet (especially the shower)
using more hot water than you think?
Refer to “Not Enough Hot Water” on
page 18.

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 water heating tariff rate been increased by your electricity retailer
since your previous bill?
ELECTRICITY TARIFFS
The electricity tariff to which your water heater is connected will determine the
overall operating cost of the system. It is important you are aware of this tariff,
i.e. Off-Peak (overnight) or time controlled supply, Extended Off-Peak (overnight
and day) or Extended time controlled supply, Domestic / Continuous. For types
of tariffs, refer to “Single Element Model” on page 7 and “Twin Element Model”
on page 7.
IF YOU HAVE CHECKED ALL THE FOREGOING AND STILL BELIEVE YOU
NEED ASSISTANCE, PHONE RHEEM SERVICE OR THEIR NEAREST
ACCREDITED SERVICE AGENT.
20
INSTALLATION
THIS WATER HEATER IS NOT SUITABLE FOR POOL HEATING
INSTALLATION STANDARDS
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.
All packaging materials must be removed from the water heater prior to its
installation. This includes the removal of the cardboard base of the carton from
the underside of the 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.
If this water heater is to be used where an uninterrupted hot water supply is
necessary for the application or business, then there should be 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 was to become inoperable
for any reason. We recommend you provide advice to the system owner about
their needs and building back-up redundancy into the hot water supply system.
WATER HEATER LOCATION
The water heater is suitable for either indoor or outdoor installation, except when
supplied with a power supply cord and plug which is suitable for indoor
installation only. Whether located outdoor or indoor, the water heater should be
installed close to the most frequently used outlet and its position chosen with
safety and service in mind.
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 temperature pressure relief valve lever is accessible and the front
cover, thermostat, heating unit and if fitted, the side cover and temperature
limiting valve can be removed for service.
21
INSTALLATION
You must be able to read the
information on the rating plate. If
possible leave headroom of one water
heater height so the anode can be
inspected or replaced. Remember you
may have to take the entire water
heater out later for servicing.
The water heater is to be installed at
ground or floor level and must stand
vertically upright on a stable base as
acceptable to local authorities. The
base of the water heater is made of
corrosion resistant material, and it may
be placed directly in contact with the
supporting surface. It is not necessary
to allow for free air circulation under the
base of the water heater.
Note: The water heater should not be placed in direct contact with a concrete
surface that is less than two months old and not fully cured as this may attack
the metal coating of the water heater base. A moisture barrier should be used
between the two surfaces in this instance.
Alternatively, a 025 to 080 model may be hung on a wall capable of taking the
weight of the filled water heater. A bracket kit is available from Rheem. Refer to
the instructions supplied with the kit.
Remember all local authorities have regulations about putting water heaters into
roof spaces.
SAFE TRAY
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. AS/NZS 3500.4 also has
particular requirements when a safe tray must
be installed.
22
INSTALLATION
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 cold water connection diagram on page 32.
025 to 160 250 to 315
Model
Temp press relief valve setting
1400 kPa
1000 kPa
Expansion control valve setting*
1200 kPa
850 kPa
With expansion control valve
960 kPa
680 kPa
Without expansion control valve
1120 kPa
800 kPa
Max. mains supply pressure
* Expansion control valve not supplied with water heater
TANK WATER SUPPLY
If the water heater is supplied with water from a tank supply and a pressure pump
system is not installed, then the bottom of the supply tank must be at least 1 m
above the highest point of the hot water plumbing system, including the water
heater. Care must be taken to avoid air locks. The cold water line to the water
heater should be adequately sized and fitted with a full flow gate valve or ball
valve.
PUSH THROUGH
INSTALLATION
(FREE
OUTLET)
It can be advantageous to plumb a 025 or
050 model water heater as a Push
Through water heater in some cases.
These installations can supply a single
point non-tempered non-ablution outlet
only. The temperature pressure relief
valve supplied with this model must be
fitted to the water heater.
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 Rheemglas 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.
23
INSTALLATION
Where a temperature limiting device is installed adjacent to the water heater, the
cold water line to the temperature limiting device can be branched off the cold
water line either before or after the isolation valve, pressure limiting valve and
non-return valve to the 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 water heater.
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.
Two Temperature Zones Using a Temperature Limiting Device
A RheemPlus water heater will
not
deliver
temperatures
exceeding 50°C, in accordance
LEGEND
with AS 3498. There
is no need to
fit a temperature limiting device to
satisfy the requirements of
AS/NZS 3500.4, if a RheemPlus
water heater is installed in an
application where 50°C is the
maximum permissible hot water
temperature at the outlet of a
sanitary fixture used primarily for
personal hygiene purposes.
24
INSTALLATION
CIRCULATED HOT WATER FLOW AND RETURN SYSTEM
A RheemPlus water heater cannot be installed as part of a circulated hot water
flow and return system in a building.
If a Rheem water heater is to be installed as part of a circulated hot water flow
and return system, it must be able to provide a hot water outlet temperature of at
least 60°C. Note: The thermostat must always be set to at least 60°C.
Refer to the Circulated Hot Water Flow and Return – Continuous Electric Water
Heater diagram on page 25.
Temperature Limiting Device
A temperature limiting device cannot be installed in circulated hot water flow and
return pipe work. The tempered water from a temperature limiting device cannot
be circulated. Where a circulated hot water flow and return system is required in
a building, a temperature limiting device can only be installed on a dead leg,
branching off the circulated hot water flow and return pipe.
If circulated tempered water were to be returned back to the water heater,
depending on the location of the return line connection on the water supply line
to the water heater, then either:

water will be supplied to the cold water inlet of the temperature limiting device
at a temperature exceeding the maximum recommended water supply
temperature, or

when the hot taps are closed no water will be supplied to the cold water inlet
of the temperature limiting device whilst hot water will continue to be supplied
to the hot water inlet of the temperature limiting device.
These conditions may result in either water at a temperature exceeding the
requirements of AS/NZS 3500.4 being delivered to the hot water outlets in the
ablution areas, or the device closing completely and not delivering water at all,
or the device failing. Under either condition, the operation and performance of
the device cannot be guaranteed.
Circulated Hot Water Flow and Return – Continuous Electric Water Heater
25
LEGEND
INSTALLATION
Off-Peak or Time Controlled Electricity Supply
A single or twin element electric water heater connected to an Off-Peak electricity
supply should not be installed as part of a circulated hot water flow and return
system in a building. The benefits of the Off-Peak electricity supply will be
significantly reduced.
If a circulated flow and return system is required, it is necessary to install a
secondary water heater in the circulated flow and return system supplied from
the Off-Peak electric water heater. The flow and return lines connect to the
secondary water heater, not the Off-Peak electric water heater. The secondary
water heater makes up for the pipe heat loss in the flow and return system and
must be able to provide a hot water outlet temperature of at least 60°C.
Note: The thermostat or preset outlet temperature of the secondary water heater
must always be set to at least 60°C.
Refer to the Circulated Hot Water Flow and Return – Off-Peak Electric Water
Heater diagram on page 26.
Circulated Hot Water Flow and Return System
Off-Peak Electric Water Heater
LEGEND
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.
26
INSTALLATION
ANODE
The vitreous enamel lined cylinder of the water heater is only covered by the
Rheem warranty when the total dissolved solids (TDS) content in the water is
less than 2500 mg/L and when the correct colour coded anode is used. If an
incorrect colour coded anode is used in the water heater, any resultant faults will
not be covered by the Rheem warranty. In addition, the use of an incorrect colour
coded anode may shorten the life of the water heater cylinder.
The correct colour coded anode for the water supply being used must be
selected and fitted to the water heater for the Rheem warranty to apply to the
water heater cylinder (refer to “Water Supplies” on page 14 and the Anode
Selection chart on page 15). The black anode is typically fitted as standard.
Total Dissolved Solids
Anode colour code
0 – 40 mg/L
Green
40 – 150 mg/L
Green or Black
150 – 400 mg/L
Black
400 – 600 mg/L
Black or Blue
600 – 2500 mg/L
Blue
2500 mg/L +
Blue (no cylinder warranty)
If the water supply has a TDS greater than 150 mg/L and a green anode has not
been changed to a black anode, or if the TDS is greater than 600 mg/L and the
anode has not been changed to a blue anode, there is the possibility the anode
may become overactive and hydrogen gas could accumulate in the top of the
water heater during long periods of no use. In areas where this is likely to occur,
the installer should instruct the householder on how to dissipate the gas safely
(refer to “Caution” on page 15).
SADDLING PIPE WORK
To prevent damage to the cylinder when attaching pipe clips or saddles to the
water heater jacket, we recommend the use of self-drilling screws with a
maximum length of 13 mm. Should pre drilling be required, extreme caution must
be observed when penetrating the jacket of the water heater.
Note: If the cylinder is damaged as a result of attaching pipe clips or
saddles to the jacket, any resultant faults will not be covered by the Rheem
warranty.
27
INSTALLATION
TYPICAL INSTALLATION – OUTDOOR LOCATION
OUTDOOR LOCATIONS
TYPICAL INSTALLATION – INDOOR LOCATION
OUTDOOR LOCATIONS
INDOOR LOCATIONS
TYPICAL INSTALLATION
INDOOR
LOCATIONS
Domestic Electric
Water
Heaters - Dual Handed
TYPICAL INSTALLATION
28
Domestic Electric Water Heaters - Dual Handed
INSTALLATION
DIMENSIONS AND TECHNICAL DATA – RHEEMGLAS 025 TO 050 MODELS
Note: 111025 models have the
water and TPR valve fittings
on the left hand side only.
Rheemglas Single Element
Rheemglas Single Element
Hot Water Delivery
Dimensions
Approx. Weight empty
111025
-
191050
Litres
18
50
A
mm
390
695
B
mm
385
400
C
mm
420
436
D
mm
130
397
E
mm
116
142
F
mm
60
60
H
deg
26
26
J
TPR Valve Setting
LH
DH
deg
65
59
kPa
1400
1400
kg
18
26
All models are suitable for indoor or outdoor installation, except when supplied with a
power supply cord and plug (having a ‘/P’ suffix) which are suitable for indoor installation
only.
111025 models have left hand (LH) water and TPR valve connections only.
191050 models have left and right hand (dual handed - DH) water and TPR valve
connections.
Technical data is subject to change.
29
INSTALLATION
DIMENSIONS AND TECHNICAL DATA – RHEEMGLAS 080 TO 160 MODELS
Note: 191, 192160 models
have the TPR valve fitting
on the left hand side only.
Rheemglas Single Element
Rheemglas Twin Element
Hot Water Delivery
Boost Capacity
Dimensions
Approx. Weight empty
191080
-
191125
-
191160
192160
Litres
80
125
160
Litres
-
-
45
A
mm
945
1340
1610
B
mm
480
480
480
C
mm
515
515
515
D
mm
702
1102
1332
E
mm
64
64
104
F
mm
66
66
66
G
mm
-
-
1081
H
deg
24
24
23
J
TPR Valve Setting
DH
DH
deg
60
60
58
kPa
1400
1400
1400
kg
36
49
55
All models are suitable for indoor or outdoor installation.
191 series 080 to 125 models have left and right hand (dual handed - DH) water and TPR
valve connections.
191, 192 series 160 models have left and right hand (dual handed - DH) water connections
and a TPR valve fitting on the left hand side only.
Technical data is subject to change.
30
INSTALLATION
DIMENSIONS AND TECHNICAL DATA – RHEEMPLUS 125 TO 315 MODELS
RheemPlus Single Element
LH
121125
121160
121250
121315
Litres
125
160
250
315
A
mm
1340
1610
1395
1640
B
mm
480
480
640
640
C
mm
515
515
680
680
D
mm
1102
1332
1117
1317
E
mm
64
104
73
113
Hot Water Delivery
Dimensions
F
mm
66
66
103
103
H
deg
23
23
32
32
J
deg
58
58
88
88
K
mm
545
545
705
705
L
TPR Valve Setting
Approx. Weight empty
mm
183
183
262
262
kPa
1400
1400
1000
1000
kg
49
57
74
99
All models are suitable for indoor or outdoor installation.
121 series models have left hand (LH) water and TPR valve connections only.
Technical data is subject to change.
31
CONNECTIONS – PLUMBING
All plumbing work must be carried out by a qualified person and in accordance
with the Standard AS/NZS 3500.4 and all local codes and regulatory authority
requirements. In New Zealand the installation must also conform to the New
Zealand Building Code.
CONNECTION SIZES

Hot water connection:
Rheemglas
Rp 3/4
RheemPlus
G 3/4 B

Cold water connection:
Rp 3/4
G 3/4 B

Relief valve connection:
Rp 1/2
Rp 1/2
WATER INLET AND OUTLET
Rheemglas 050 to 160 models have dual handed cold and hot water
connections. The water connections can be made to either side. Rheemglas 025
and RheemPlus 160 to 315 models have cold and hot water connections on the
left hand side only.
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 an approved thread sealant such as Teflon tape
on all threaded joints.
An isolation valve and non-return
valve must be installed on the cold
water line to the water heater. An
acceptable arrangement is shown in
the diagram. Refer also to “Hot
Water Delivery” on page 23 and to
“Mains Water Supply” on page 23.
A disconnection union must always
be provided at the cold water inlet
and hot water outlet on the water
heater to allow for disconnection of
the water heater.
This water heater has either a plastic dip tube or fitting
liner in the inlet and outlet fittings (see diagram). These
must be in place for the water heater to function
properly. Do not remove or damage them by using
heat nearby. They will be pushed into the correct
position as the fitting is screwed in.
32
CONNECTIONS – PLUMBING
LEFT AND RIGHT HAND SIDE WATER CONNECTIONS
The cold and hot water supplies (050 to 160 Rheemglas models) and
temperature pressure relief valve (050 to 125 Rheemglas models) can be
connected to either side of a water heater. A kit is supplied with the water heater
to plug off the unused cold water and hot water fittings, and where applicable the
unused temperature pressure relief valve fitting.
The kit contains:
Models 050 to 125
2 x ¾” brass plugs
1 x ½” brass plug
3 x plastic caps
3 x insulation rubber discs,
pre-fitted into plastic caps
1 x allen key
Models 160
2 x ¾” brass plugs
2 x plastic caps
2 x insulation rubber discs,
pre-fitted into plastic caps
1 x allen key
Plugging Off Unused Connections

Apply approved sealing tape or compound to the thread of each plug.

Fit the ¾” plugs to the unused cold water fitting and unused hot water fitting.
Tighten the plugs with the allen key supplied.

Fit the ½” plug to the unused TPR valve fitting (050 to 125 models). Tighten
the plug with the allen key supplied.

Fit a plastic cap with its insulation rubber disc over each plug.
PLASTIC CAP
PLASTIC CAP
INSULATION RUBBER
BRASS PLUG
INSULATION RUBBER
BRASS PLUG
TPRV FITTING
080 & 125
MODELS ONLY
050 models
INSULATION
CAP & DISK ASSEMBLY
080 toCAP
160
models
INSULATION
& DISK
ASSEMBLY
080-400 MODELS ELECTRIC
33
SK7396
CONNECTIONS – PLUMBING
PIPE SIZES
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 pipe sizing for hot water supply systems should be carried out by persons
competent to do so, choosing the most suitable pipe size for each individual
application. Reference to the technical specifications of the water heater and
local regulatory authority requirements must be made.
TEMPERATURE PRESSURE RELIEF VALVE
The temperature pressure relief valve is shipped either under the top flap of the
water heater carton or behind the front cover or in a plastic bag attached to the
water heater. The temperature pressure relief valve must be fitted before the
water heater is operated. Before fitting the relief valve, make sure the probe has
not been bent. Seal the thread with an approved thread sealant such as Teflon
tape - never hemp. Make sure the tape does not hang over the end of the thread.
The water heater has a temperature pressure relief valve connection on its left
hand side. Rheemglas 050 to 125 Rheemglas models have a second
temperature pressure relief valve connection on the right hand side.
Screw the valve into the selected opening labelled “Relief Valve” (refer to the
installation diagram on page 28) leaving the valve outlet pointing downwards. Do
not use a wrench on the valve body - use the spanner flats provided. A copper
drain line must be fitted to the temperature pressure relief valve (refer to "Relief
Valve Drain" on page 36). If the water heater has a second relief valve fitting,
refer to “Left and Right Hand Side Water Connections” on page 33.
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.
Where a flexible insulation collar is supplied with the temperature pressure relief
valve, this must be placed over the body of the valve, prior to fitting the valve to
the water heater. If the insulation collar is of a firmer preformed type, it must be
secured in position with the cable tie provided (refer to the diagrams on page 35).
34
CONNECTIONS – PLUMBING
OPEN AND FIT
SUPPLIED
INSULATION TO
VALVE AS SHOWN
USE TEFLON TAPE
USE TEFLON TAPE
FIT SUPPLIED INSULATION TO
VALVE AS SHOWN
insulation collar
preformed insulation collar
TPR Valve Insulation - Electric Water Heaters
EXPANSION CONTROL VALVE
Local regulations may make it mandatory to installSK7400
an expansion
control valve
A4
02/13
(ECV) in the cold water line to the water heater.REVInADother
areas, an ECV is
required if the saturation index is greater than +0.4 (refer to “Water Supplies” on
page 14).
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 the cold water
connection diagram on page 32). A copper drain line must be fitted to the
expansion control valve (refer to "Relief Valve Drain" on page 36).
The valve, if installed within 500 mm of the water heater, 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.
35
S
R
CONNECTIONS – PLUMBING
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 nine (9) metres with no more than three
bends greater than 45° before discharging at an outlet or air break. The
maximum length of nine (9) metres for a drain line is reduced by one (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.
36
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 Wiring Rules AS/NZS 3000 and all local codes and
regulatory authority requirements.
WATER HEATER
A water heater not fitted with a supply cord and plug must be directly connected
to a 240 V AC, 50 Hz mains power supply with an isolating switch installed at the
switchboard.
The power supply to a twin element model should be Off-Peak (overnight) to the
bottom heating unit and continuous to the top heating unit. The power supply to
a single element model can be either an Off-Peak (overnight), Extended OffPeak (overnight and day) or continuous electricity supply, depending upon the
size of the water heater. Check with the local electricity supply authority as to
their requirements. An Off-Peak (overnight) power supply will provide the
maximum financial savings. Discuss the power supply requirements with the
householder.
A flexible 20 mm conduit is required for the electrical cable to the water heater.
The conduit is to be connected to the unit with a 20 mm terminator. Connect the
power supply wires directly to the terminal block and earth tab connection,
ensuring there are no excess wire loops inside the front cover. The temperature
rating of the power supply wires insulation must suit this application.
A water heater fitted with a supply cord and plug must be plugged into a switched
240 V AC, 50 Hz mains power outlet rated at 10 A.
THERMOSTAT SETTING
The thermostat on a Rheemglas and RheemPlus model is tradesperson
adjustable from 60°C to 70°C (60°C to 75°C on a 050 model). The factory setting
of the thermostat is 70°C for 025, 080 to 315 models and 75°C for 050 models.
The thermostat is adjusted by turning the adjuster anticlockwise to decrease the
temperature setting and clockwise to increase the temperature setting. Only
adjust the thermostat setting when the isolating switch is switched off at the
switchboard. The top thermostat on a twin element model is fixed at 60°C and
cannot be adjusted.
37
CONNECTIONS – ELECTRICAL
The thermostat of a RheemPlus model should not be set to less than 65°C. This
is to assist in the specified operation of the temperature limiting valve.
For reasons of safety and economy, we advise the thermostat be set at the
lowest temperature that will provide sufficient hot water. Dishwasher running
costs can be adversely affected if the thermostat is set below 65°C. Discuss the
thermostat setting requirements with the householder.
WIRING DIAGRAM TWIN ELEMENT ELECTRIC WATER HEATERS
NON-SIMULTANEOUS OPERATION OFF-PEAK CONNECTION
Top thermostat – fixed setting
Bottom thermostat – tradesperson adjustable
60°C.
min 60°C, max 70°C.
Electrical Circuit for Twin Element Models – Robertshaw “ST” Thermostats
The active from the continuous supply must be connected to the top heating unit
circuit and the active from the Off-Peak or time controlled supply must be
connected to the bottom heating unit circuit.
38
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 at the power outlet (power supply cord model
only).

Switch on the electrical supply at the isolating switch to the water heater.
If it is necessary to adjust the outlet temperature of a RheemPlus model, refer to
“Outlet Temperature Compensation Adjustment – RheemPlus” on page 40.
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 (power supply cord
model only).

Close the cold water isolation valve at the inlet to the water heater.
39
COMMISSIONING
OUTLET TEMPERATURE COMPENSATION ADJUSTMENT – RHEEMPLUS
The maximum outlet temperature of a RheemPlus water heater may be adjusted
to compensate for temperature losses in the pipe work between the water heater
outlet and sanitary fixtures.
Warning: After adjustment of the temperature limiting valve, the water
temperature MUST NOT exceed 50°C from the first tap in the hot water pipe
work after the water heater used for personal hygiene purposes, such as in a
bathroom or ensuite.
To adjust the maximum outlet temperature:

Ensure the temperature of the water in the water heater is up to the
thermostat setting on the water heater.
The temperature of the water can be measured at the temperature pressure
relief valve drain discharge point. Do not measure this temperature from a hot
tap
 Operate the easing lever on the temperature pressure relief valve and
place the thermometer in the flow of water from the relief valve drain line.

Remove the upper plastic
casing and insulation covering
the pipe work on the side of
the water heater, by removing
the three (3) retaining screws,
to expose the temperature
limiting valve.

Locate the first hot tap in the
hot water pipe work after the
water heater used for personal
hygiene purposes.

Turn on the hot tap fully to
achieve maximum flow.

Using a thermometer, measure the temperature of the water from the tap,
until the temperature stops increasing.
RHEEMPLUS CASING REMOVAL
If the water temperature is below 50°C the maximum outlet temperature of
the water heater can be adjusted upwards.
40
COMMISSIONING

Turn the adjusting knob on the
temperature limiting valve
counter-clockwise
(down
away from the water heater),
using a 6 mm Allen key.
Turning the adjusting knob
counter clockwise (down away
from the water heater)
increases the outlet water
temperature,
turning
it
clockwise (up towards the
water heater) decreases the
outlet water temperature.


Repeat the water temperature measurement from the same hot tap.
RHEEMPLUS
TEMPERATURE
ADJUSTMENT
Further adjust the temperature
limiting valve as
required, turning the adjusting
knob either counter clockwise (down away from the water heater) or
clockwise (up towards the water heater) to increase or decrease the outlet
water temperature, until an acceptable water temperature not exceeding
50°C is measured at the same hot tap.
Note: The valve has a stop point for both maximum and minimum outlet water
temperature adjustment. The outlet water temperature cannot be increased
or decreased beyond these points. It is possible that, depending upon valve
tolerances and the pipe work design, 50°C water temperature may not be
attainable at the hot tap.

Turn off the hot tap.

Replace the insulation and plastic casing to cover the temperature limiting
valve and pipe work on the side of the water heater and secure using the
three (3) retaining screws.
41
DRAINING THE WATER HEATER
Warning: Exercise care, as water discharged from the water heater may be
of a very high temperature.
To drain the water heater:

Turn off the water heater (refer to “To Turn Off The Water Heater” on
page 39).

Close all hot water taps.

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.
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44
RHEEM ELECTRIC DOMESTIC MAINS PRESSURE
WATER HEATER WARRANTY - AUSTRALIA ONLY
ELECTRIC WATER HEATERS 111, 121, 191, 192 SERIES
1. THE RHEEM WARRANTY – GENERAL
1.1 This warranty is given by Rheem Australia Pty Limited ABN 21 098 823 511 of 1 Alan Street,
Rydalmere New South Wales.
1.2 Rheem offer a trained and qualified national service network who will repair or replace components
at the address of the water heater subject to the terms of the Rheem warranty. Rheem Service, in
addition can provide preventative maintenance and advice on the operation of your water heater.
The Rheem Service contact number is available 7 days a week on 131031 with Service personnel
available to take your call from 8am to 8pm daily (hours subject to change).
1.3 For details about this warranty, you can contact us on 131031 or by email at
warrantyenquiry@rheem.com.au (not for service bookings).
1.4 The terms of this warranty and what is covered by it are set out in sections 2 and 3 and apply to
water heaters manufactured after 1st April 2013.
1.5 If a subsequent version of this warranty is published, the terms of that warranty and what is covered
by it will apply to water heaters manufactured after the date specified in the subsequent version.
2. TERMS OF THE RHEEM WARRANTY AND EXCLUSIONS TO IT
2.1 The decision of whether to repair or replace a faulty component is at Rheem’s sole discretion.
2.2 If you require a call out and we find that the fault is not covered by the Rheem warranty, you are
responsible for our standard call out charge. If you wish to have the relevant component repaired
or replaced by Rheem, that service will be at your cost.
2.3 Where a failed component or cylinder is replaced under this warranty, the balance of the original
warranty period will remain effective. The replacement does not carry a new Rheem warranty.
2.4 Where the water heater is installed outside the boundaries of a metropolitan area as defined by
Rheem or further than 25 km from either a regional Rheem branch office or an Accredited Rheem
Service Agent's office, the cost of transport, insurance and travelling between the nearest branch
office or Rheem Accredited Service Agent’s office and the installed site shall be the owner’s
responsibility.
2.5 Where the water heater is installed in a position that does not allow safe or ready access, the cost
of that access, including the cost of additional materials handling and/or safety equipment, shall
be the owner’s responsibility. In other words, the cost of dismantling or removing cupboards, doors
or walls and the cost of any special equipment to bring the water heater to floor or ground level or
to a serviceable position is not covered by this warranty.
2.6 This warranty only applies to the original and genuine Rheem water heater in its original installed
location and any genuine Rheem replacement parts.
45
RHEEM ELECTRIC DOMESTIC MAINS PRESSURE
WATER HEATER WARRANTY - AUSTRALIA ONLY
ELECTRIC WATER HEATERS 111, 121, 191, 192 SERIES
2.7 The Rheem warranty does not cover faults that are a result of:
a) Accidental damage to the water heater or any component (for example: (i) Acts of God such
as floods, storms, fires, lightning strikes and the like; and (ii) third party acts or omissions).
b) Misuse or abnormal use of the water heater.
c) Installation not in accordance with the Owner’s Guide and Installation Instructions or with
relevant statutory and local requirements in the State or Territory in which the water heater is
installed.
d) Connection 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.
e) Repairs, attempts to repair or modifications to the water heater by a person other than Rheem
Service or a Rheem Accredited Service Agent.
f)
Faulty plumbing or faulty power supply.
g) Failure to maintain the water heater in accordance with the Owner's Guide and Installation
Instructions.
h) Transport damage.
i)
Fair wear and tear from adverse conditions (for example, corrosion).
j)
Cosmetic defects.
2.8 Subject to any statutory provisions to the contrary, this warranty excludes any and all claims for
damage to furniture, carpet, 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.
2.9 If the water heater is not sized to supply the hot water demand in accordance with the guidelines
in Rheem’s water heater literature, any resultant fault will not be covered by the Rheem warranty.
46
RHEEM ELECTRIC DOMESTIC MAINS PRESSURE
WATER HEATER WARRANTY - AUSTRALIA ONLY
ELECTRIC WATER HEATERS 111, 121, 191, 192 SERIES
3. WHAT IS COVERED BY THE RHEEM WARRANTY
FOR THE WATER HEATERS DETAILED IN THIS DOCUMENT
3.1 Rheem will repair or replace a faulty component of your water heater if it fails to operate in
accordance with its specifications as follows:
What components are
covered
The period from the
date of installation in
which the fault must
appear in order to be
covered
What coverage you receive
All components
Year 1
Repair and/or replacement of the faulty
component, free of charge, including labour.
Years 2 & 3
Repair and / or replacement of the cylinder,
free of charge, including labour.
Years 4 to 7
Replacement cylinder, free of charge.
Installation and repair labour costs are the
responsibility of the owner.
Years 2 & 3
Replacement cylinder, free of charge.
Installation and repair labour costs are the
responsibility of the owner.
Rheemglas / RheemPlus models
The cylinder
(if the water heater is
installed in a single-family
domestic dwelling)
The cylinder
(if the water heater is not
installed in a single-family
domestic dwelling)
47
RHEEM ELECTRIC DOMESTIC MAINS PRESSURE
WATER HEATER WARRANTY - AUSTRALIA ONLY
ELECTRIC WATER HEATERS 111, 121, 191, 192 SERIES
4. ENTITLEMENT TO MAKE A CLAIM UNDER THIS WARRANTY
4.1 To be entitled to make a claim under this warranty you need to:
a) Be the owner of the water heater or have consent of the owner to act on their behalf.
b) Contact Rheem Service without undue delay after detection of the defect and, in any event,
within the applicable warranty period.
4.2 You are not entitled to make a claim under this warranty if your water heater:
a) Does not have its original serial numbers or rating labels.
b) Is not installed in Australia.
5. HOW TO MAKE A CLAIM UNDER THIS WARRANTY
5.1 If you wish to make a claim under this warranty, you need to:
a) Contact Rheem on 131031 and provide owner’s details, address of the water heater, a contact
number and date of installation of the water heater or if that’s unavailable, the date of
manufacture and serial number (from the rating label on the water heater).
b) Rheem will arrange for the water heater to be tested and assessed on-site.
c) If Rheem determines that you have a valid warranty claim, Rheem will repair or replace the
water heater in accordance with this warranty.
5.2 Any expenses incurred in the making of a claim under this warranty will be borne by you.
6. THE AUSTRALIAN CONSUMER LAW
6.1 Our goods come with guarantees that cannot be excluded under the Australian Consumer Law.
You are entitled to a replacement or refund for a major failure and for compensation for any other
reasonably foreseeable loss or damage. You are also entitled to have the goods repaired or
replaced if the goods fail to be of acceptable quality and the failure does not amount to a major
failure.
6.2 The Rheem warranty (set out above) is in addition to any rights and remedies that you may have
under the Australian Consumer Law.
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
Revision Date: 2016 November
122179D
48