EverHot 647270 Technical Document

This water heater must be installed and serviced by a qualified person.
Please leave this guide with the householder.
Owner’s Guide
and
Installation Instructions
Gas Domestic Outdoor
Water Heater
647270 models

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.
Warning: Upon completion of the installation and commissioning of the
water heater, leave this guide with the householder or responsible officer.
DO NOT leave this guide inside of the cover of the water heater, as it may
interfere with the safe operation of the water heater or ignite when the water
heater is turned on.

3
CONTENTS
HOUSEHOLDER –We recommend you read pages 4 to 21.
The other pages are intended for the installer
but may be of interest.
About Your Water Heater............................................................4
Regular Care ..............................................................................10
Water Supplies...........................................................................14
Save A Service Call ...................................................................18
Installation..................................................................................22
Connections –Plumbing ..........................................................32
Commissioning..........................................................................36
Lighting The Water Heater........................................................40
Draining The Water Heater .......................................................44
Warranty.....................................................................................46

4
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 Everhot®water heater model you have chosen is suitable for outdoor
installation only. This model is a 5 star gas water heater.
Water is stored in a vitreous enamel lined
steel cylinder and heated by a gas burner
located under the cylinder. The heat produced
by the burner is transferred to the water
through the base, top and wall of the cylinder
and through the wall of a flue pipe which
passes through the centre of the cylinder. The
gas supply to the burner is controlled by the
thermostat so the water is heated to a
constant temperature.
Automatic safety controls are fitted to the
water heater to provide safe and efficient
operation.
MAINS PRESSURE
The water heater is designed to operate at mains pressure by connecting
directly to the mains water supply. If the mains supply pressure in your area
exceeds that shown on page 25, a pressure limiting valve must be fitted. The
supply pressure should be greater than 350 kPa for true mains pressure
operation to be achieved.

ABOUT YOUR WATER HEATER
5
HOW HOT SHOULD THE WATER BE?
The water heater features a user adjustable
thermostat, which allows you to personally
choose the most suitable temperature for your
hot water needs. Refer to “Temperature
Adjustment” on page 5.
To meet the requirements of the National
Plumbing Standard the temperature of the
stored water must not be below 60°C.
Note: AS 3498 requires that a water heater
provides the means to inhibit the growth of
Legionella bacteria in potable water. This
water heater can satisfy this AS 3498
requirement provided it is operating and the
thermostat setting is 60°C or higher, including
when it is used as an in-series booster water
heater for a solar 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 an Everhot 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.
TEMPERATURE ADJUSTMENT
The temperature adjusting dial is on the gas
valve, located behind the access cover on the
lower front of the water heater. A setting of „4‟
will normally maintain the water temperature
at about 60°C. Each number represents a
temperature difference of approximately 10°C.
To increase the water temperature to 70°C,
turn the temperature adjusting dial
anticlockwise to a setting of „5‟. Refer to
“Hotter Water Increases the Risk of Scald
Injury” on page 5.
maximum
thermostat setting
maximum
recommended supply
temperature to
bathrooms and
ensuites
minimum
recommended stored
water temperature

ABOUT YOUR WATER HEATER
6
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.
SAFETY
This water heater is supplied with a thermostat, an over-temperature cut-out, a
thermocouple and a combination temperature pressure relief valve. These
devices must not be tampered with or removed. The water heater must not be
operated unless these devices are fitted and are in working order.
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 Everhot 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.
Do not store flammable or
combustible materials near the water
heater. Flammable liquids (such as
petrol), newspapers and similar articles
must be kept well away from the water
heater and the flue terminal.
Do not use aerosols, stain removers
and household chemicals near the
water heater whilst it is working. Gases
from some aerosol sprays, stain
removers and household chemicals
become corrosive when drawn into a
flame.
Do not store swimming pool chemicals, household cleaners, etc., near
the water heater.
Do not place anything on top of the water heater or in contact with the flue
terminal. Ensure the flue terminal is not obstructed in any way at any time.
Do not use Propane / Butane gas mixtures in a Propane model. A Propane
model is designed to operate on Propane only. The use of
Propane / Butane mixture, such as automotive LPG fuel, in a Propane
model is unsafe and can cause damage to the water heater.

ABOUT YOUR WATER HEATER
7
PIEZO IGNITION
The “Piezo” push button igniter makes lighting
the pilot flame of your water heater very easy.
Simply follow the instructions on the label
attached to the back of the access door.
There is no need for matches to light the
water heater.
PILOT IGNITER
A permanent pilot flame burns to ignite the
main burner automatically. Heat from the pilot
is absorbed by the water.
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 “Regular Care” 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 it is necessary to turn off the water heater:
Shut down the gas control (refer to “Close Down Procedure” on page 43).
Close the gas isolation valve at the inlet to the gas control.
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 at the inlet to the water heater.
Open the gas isolation valve fully at the inlet to the gas control.
Light the water heater (refer to “Lighting the Water Heater” on page 40).

ABOUT YOUR WATER HEATER
8
GOING ON HOLIDAYS
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, the gas knob can be set to the red star “ ” (pilot) position (facing
the front) to conserve energy (refer to steps 1, 2 and 4 of “Close Down
Procedure” on page 43).
If it is necessary to turn off the water heater, refer to “To Turn Off The Water
Heater” on page 7.
Note: When turned back on from the red star “ ” (pilot) position or white dot
“” (off) position, the water heater may take up to an hour to reheat if the water
has lost temperature.
HOW DO I KNOW IF THE WATER HEATER IS INSTALLED CORRECTLY?
Installation requirements are shown on pages 22 to 30. 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 5601 or AS/NZS 5601.1,
as applicable under local regulations, and all local codes and regulatory
authority requirements.
In New Zealand, the installation must also conform with NZS 5261, as
applicable under local regulations, and 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.

ABOUT YOUR WATER HEATER
9
HOW LONG WILL THE WATER HEATER LAST?
The water heater is supported by a manufacturer‟s warranty (refer to page 46).
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 7.

10
REGULAR CARE
ANNUAL SERVICE
For safe and efficient operation, it is recommended an annual service be
conducted on the water heater.
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 annual service and routine replacement of any components, if
required, are not included in the Everhot warranty. A charge will be made for
this work. Only genuine replacement parts should be used on this water heater.
The annual service includes the following actions:
Inspect and flush the temperature pressure relief valve.
Inspect and flush the expansion control valve (if fitted).
Check and if necessary adjust the gas pressure.
Check the piezo igniter, gas control and thermocouple.
Check the operation of and clean the pilot light and main burner.
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. Hot water may not be available for a while.

REGULAR CARE
11
MAJOR FIVE YEAR SERVICE
It is recommended a major five year service be conducted on the water heater.
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 five year service and routine replacement of any components, such
as the anode and relief valve(s), are not included in the Everhot warranty. A
charge will be made for this work. Only genuine replacement parts should be
used on this water heater.
The major service includes the following actions:
Replace the temperature pressure relief valve.
Inspect and flush the expansion control valve (if fitted). If required, replace
the valve.
Inspect and if required, replace the anode.
If the anode is not replaced, it should be replaced within three years of this
service (refer to “Anode Inspection and Replacement” on page 15).
Check and if necessary adjust the gas pressure.
Check the piezo igniter, gas control and thermocouple.
Check the operation of and clean the pilot light and main burner.
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. Hot water may not be available for a while.

REGULAR CARE
12
MINOR SIX MONTH MAINTENANCE
It is recommended minor maintenance be performed every six months 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 13.
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 12.
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, 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. It is very important you raise and lower the lever gently. The
expansion control valve should be checked for performance or replaced at
intervals not exceeding 5 years, or more frequently in areas where there is a
high incidence of water deposits.

REGULAR CARE
13
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 months. It is very important
you raise and lower the lever gently.
Warning: Failure to do this may
result in the water heater cylinder
failing.
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 5 years, or more frequently in areas where there is a high incidence
of water deposits (refer to “Water Supplies” on page 14).
water
heater
water
heater
drain
line
lift until water
flows from the
drain line –
lower gently

14
WATER SUPPLIES
This water heater must be installed in accordance with this advice to be
covered by the Everhot 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 Everhot warranty to apply.
ANODE
The vitreous enamel lined cylinder of the water heater is only covered by the
Everhot warranty when the total dissolved solids (TDS) content in the water is
less than 600 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 Everhot 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 Everhot 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 mg/L + *
Blue (no cylinder warranty)
* Note: The Everhot warranty does not apply to the cylinder if the water
heater is connected at any time to a water supply where the TDS content
of the water exceeds 600 mg/L.
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.

WATER SUPPLIES
15
CONDUCTIVITY - µS/cm
TOTALDISSOLVEDSOLIDS &CONDUCTIVITY
(vitreous enamel lined water heater cylinder)
40 150
TOTALDISSOLVED SOLIDS (TDS) -mg/L
ANODE SELECTION
warranty applies to a vitreous enamel lined water heater cylinder if the
correct coloured anode is used for the TDS / conductivity level of water
600
860
no warranty
applies
to a vitreous
enamel lined
water heater
cylinder
Black
Green
60
0
0
Blue
215
400
570
ANODE INSPECTION AND REPLACEMENT
The anodes installed in a vitreous enamel lined steel water heater cylinder will
slowly dissipate whilst protecting the cylinder. The life of the cylinder may be
extended by replacing the anodes.
If the anodes are not replaced during a five year service (refer to “Major Five
Year Service” on page 11) then the maximum time after installation when the
anodes should be replaced for this gas water heater is 8 years.
For water supplies which are either softened, desalinated or where the water
supply may alternate between a water tank and a reticulated public supply or
another supply, it is recommended the anodes be replaced within 5 years of
installation.
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. In areas where this is likely to
occur, the installer should instruct the householder on how to dissipate the gas
safely.
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.

WATER SUPPLIES
16
SATURATION INDEX
The saturation index (SI) is used as a measure of the water‟s corrosive or
scaling properties.
In a corrosive water supply, the water can attack copper parts and cause them
to fail.
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 Everhot warranty to apply to the temperature
pressure relief valve and water heater cylinder.
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.
-1.0
no warranty applies to a:
temperature pressure relief valve or a
water heater cylinder unless an
expansion control valve is fitted.
SATURATION INDEX (SI)
GAS STORAGE WATER HEATERS
WITHIN WARRANTY
SPECIFICATION
SATURATION INDEX
(calculated @ 80°C water temperature)
+0.4 +0.80
very corrosive very scaling
scaling
corrosive

WATER SUPPLIES
17
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 and a temperature pressure relief valve.
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
Everhot 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
Everhot warranty will not cover any resultant faults on the components listed
below:
Water Chemistry
Component
Total Dissolved Solids (TDS) > 600 mg/L
water heater cylinder
Total Dissolved Solids (TDS)
not suitable for anode type
water heater cylinder
Saturation Index (SI) > +0.4
(if expansion control valve is not fitted)
water heater cylinder
temperature pressure relief valve

18
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 manufacture or failure of
a part.
NOT ENOUGH HOT WATER (OR NO HOT WATER)
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.
Pilot flame alight?
Check the pilot flame is burning by removing the access cover.
Relight the pilot flame according to the lighting instructions (refer to “Lighting
the Water Heater”on page 40).
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 adjust the thermostat upwards to gain additional hot
water capacity.
Warning: Hotter water increases the risk of scald injury.
Water heater size
Do you have the correct size water heater for your requirements?
The sizing guide in the sales literature suggests average sizes that may be
needed.
WATER NOT HOT ENOUGH
You may find that due to heavy hot water usage the water temperature may be
lower than normally expected.

SAVE A SERVICE CALL
19
TEMPERATURE PRESSURE RELIEF VALVE RUNNING
Normal Operation
It is normal and desirable 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 13). 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 the water heater is cold - then stops
until water reheats
The gas control must be turned off using the gas knob on top of the gas
control thermostat (refer to “Close Down Procedure” on page 43). Phone
Rheem Service or their nearest Accredited Service Agent to arrange for
inspection.
EXPANSION CONTROL VALVE RUNNING
If an expansion control valve is fitted in the cold water line to the water heater
(refer to 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.

SAVE A SERVICE CALL
20
CAN’T LIGHT THE PILOT FLAME
Is there gas to the water heater?
Check the gas isolation valve on the
gas supply line is open.
Is there a normal gas supply to the
rest of the premises?
Try lighting another gas appliance to
check. If there is no gas, call the gas
supplier.
WATER HEATER APPEARS TO BE LEAKING
When the water heater is first lit, or after a
large usage of hot water, condensation
may form on and drip from the burner and
grille at the front of the water heater.
During periods of heavy condensation, the
condensate may also form around the base
of the water heater. This is quite normal,
especially in winter months and will dry off
as the water is heated.
The water heater will drip water during the
heating cycle. It is possible for several litres
a day of condensation to discharge from
the flue onto the burner tray especially in
cool conditions. This water is not from the
mains supply but is condensation from the
atmosphere caused by the efficient
operation of the water heater.
Note: During the heating cycle it is not unusual to see water vapour clouds
steaming from the flue terminal. This is normal operation of the water heater.