Rheem 111, 121, 191, 192 User Manual
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.
This water heater may be protected by one or more patents or registered designs
in the name of Rheem Australia Pty Ltd.
® 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.
PATENTS
TRADEMARKS
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
maximum thermostat setting
050 models
minimum thermostat setting
and minimum recommended
stored water temperature.
top heating unit thermostat
setting on a twin element
model (not adjustable)
maximum thermostat setting
Rheemglas and RheemPlus
(025, 080 to 315 models)
RheemPlus maximum delivery
temperature.
maximum recommended
supply temperature to
bathrooms and ensuites
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
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
water
heater
drain
line
lift until water
flows from the
drain line –
lower gently
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.
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.
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
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)
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.
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
(3570)
Green
150
2500
600
400
TOTAL DISSOLVED SOLIDS (TDS) mg/L
(CONDUCTIVITY - μS/cm)
(215)
(570)
(860)
Black
40
(60)
Blue
Blue
ANODE SELECTION
Above 2500 mg/L,
no warranty applies
to a vitreous-
enamel-lined water
heater cylinder
Warranty applies to a vitreous-enamel-lined
water heater cylinder if the correct coloured
anode is used for the TDS of the water
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
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