Rinnai HOTFLO Operation & Installation Manual
This appliance shall be installed in accordance with:
x Manufacturers Installation Instructions
x Municipal Building Codes
x AS/NZS 3000 Wiring Rules
x AS/NZS 3500.4 Plumbing and Drainage
x Any other local relevant Statutory Regulation
Installation and Service must be performed by an authorised person.
THIS APPLIANCE IS NOT SUITABLE FOR USE AS A POOL OR SPA HEATER.
Mains Pressure Vitreous Enamel
Electric Storage Water Heater
®
‘HOTFLO’ Operation / Installation Manual
Distributed and serviced in Australia under a Quality
System certified as complying with ISO 9001 by
SAI Global
Rinnai Australia - i - HOTFLO Electric Storage Tanks Operating/Installation Manual
Your Rinnai Hotflo Mains Pressure Vitreous Enamel Storage Electric Water Heater has been certified
by relevant plumbing and electrical authorities and the details are shown on data plate.
This appliance must be installed correctly by an authorised person and must conform to location
regulations.
The installation must also comply with the instructions supplied by Rinnai.
Please keep this instruction booklet in a safe place for future reference.
Notice to Victorian Consumers
This appliance must be installed by a person licensed with the Plumbing Industry Commission.
Only a licensed person will have insurance protecting their workmanship.
So make sure you use a licensed person to install this appliance and ask for your Compliance
Certificate.
For further information contact the Plumbing Industry Commission on 1800 015 129.
Installation and service only by an authorised person.
Removal of access covers will expose 240V wiring. Access covers to be removed by authorised
persons only.
This water heater is not intended to be operated or adjusted by young children or infirm persons.
Young children must be supervised to ensure they do not interfere with the water heater.
If the power supply cord, plug or electrical conduit to the water heater is damaged, it must be replaced
by an authorised person in order to avoid a hazard, using genuine replacement parts available from
Rinnai.
• DO NOT operate this system before reading the manufacturers instructions
• DO NOT place articles on or against this appliance
• DO NOT store chemicals or flammable materials near this appliance
• DO NOT operate with panels or covers removed from this appliance
• DO NOT activate heating elements unless cylinder is full of water
• DO NOT touch any power supply cords, plugs or electrical conduits with wet hands.
REGULATORY INFORMATION
WARNINGS
Rinnai Australia - ii - HOTFLO Electric Storage Tanks Operating/Installation Manual
REGULATORY INFORMATION...................................................................................i
WARNINGS ..................................................................................................................i
SAFETY.......................................................................................................................4
Hydrogen Gas.................................................................................................................................... 4
Water Temperature............................................................................................................................ 4
IMPORTANT INFORMATION .....................................................................................4
SAFETY DEVICES ............................................................................................................................ 5
ANODE .............................................................................................................................................. 5
WATER QUALITY.............................................................................................................................. 5
TURNING ‘OFF’ THE WATER HEATING SYSTEM.......................................................................... 5
TURNING ‘ON’ THE WATER HEATING SYSTEM............................................................................ 5
HOW THE WATER HEATER WORKS.............................................................................................. 5
REGULAR CARE............................................................................................................................... 6
Over flow tray and drain..................................................................................................................... 6
Pressure and Temperature Relief (P&TR) Valve............................................................................... 6
Expansion Control Valve (ECV) if fitted ............................................................................................. 6
SERVICING AND REPAIR..........................................................................................7
SAVE A SERVICE CALL ................................................................................................................... 7
LACK OF HOT WATER OR NO HOT WATER ................................................................................. 7
HIGH ELECTRICITY BILLS............................................................................................................... 7
WATER HEATER VALVES DISCHARGING EXCESSIVELY ........................................................... 8
GENERAL INSTALLATION ........................................................................................9
INSTALLATION DIAGRAMS ............................................................................................................. 9
Figure 1 - Typical Installation of Water Heater ................................................................................ 9
Figure 2 - Hot Water Plumbing System Example - No Temperature Limiting Device ..................... 9
Figure 3 - Hot Water Plumbing System Example - with Temperature Limiting Device (TLD) ....... 10
Figure 4 - Hot Water Plumbing Water Heater system Example - with Flow & Return Pipe Work . 10
Figure 5 - Hot Water Plumbing System Example with Flow and Return Pipe Work and TLD....... 11
WATER HEATER LOCATION......................................................................................................... 11
WATER QUALITY............................................................................................................................ 12
Connection to a low pressure gravity or tank water supply.............................................................. 12
HOT WATER STORAGE AND DELIVERY TEMPERATURES ....................................................... 12
Storage Temperature....................................................................................................................... 12
Sanitary Fixtures Delivery Temperature ..........................................................................................12
Water Pipes ..................................................................................................................................... 12
Electrical Supply .............................................................................................................................. 13
Valves and fittings............................................................................................................................ 13
TABLE OF CONTENTS
Rinnai Australia - iii - HOTFLO Electric Storage Tanks Operating/Installation Manual
PLUMBING CONNECTIONS .......................................................................................................... 13
P&TR Valve Connection .................................................................................................................. 13
Expansion Control Valve (ECV)....................................................................................................... 14
Drain Lines....................................................................................................................................... 14
ELECTRICAL CONNECTIONS ...................................................................................................... 14
Figure 6 - Single Element Wiring Diagram .................................................................................... 14
Thermostat Setting........................................................................................................................... 14
COMMISSIONING .....................................................................................................15
To fill and turn ‘ON’ the water heater ............................................................................................... 15
To turn ‘OFF’ the water heater......................................................................................................... 15
Draining............................................................................................................................................ 15
SPECIFICATIONS.....................................................................................................16
Figure 7 - Dimensional Drawing ..................................................................................................... 16
Table 1 - Specifications ................................................................................................................... 17
Table 2 - Warranty Terms .............................................................................................................. 18
Definition of Domestic Use............................................................................................................... 18
Definition of Commercial Use .......................................................................................................... 18
WARRANTY ..............................................................................................................18
WARRANTY CONDITIONS.............................................................................................................19
Table 3 - Water chemistry and impurity limits for all water heating systems .................................. 19
WARRANTY EXCLUSIONS ............................................................................................................ 19
CONTACT INFORMATION .......................................................................................21
CUSTOMER INFORMATION
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Hydrogen Gas
If the hot water heater is not used for two weeks or more, a quantity of hydrogen gas, which is highly
flammable, may accumulate in the water heater. To dissipate this safety, it is recommended that a non
electrically operated hot tap be turned on for several minutes at a sink, or bath, but not at dishwasher
or other appliance. During this procedure there must be no smoking, open flame or any electrical
appliance operating nearby. If hydrogen gas is discharged through the tap, it will probably make a
sound like air escaping.
Water Temperature
To meet regulatory requirements the temperature of stored water heater must not be less than 60°C.
The thermostat on your water heater is factory pre-set to 65°C which is suitable for the vast majority
of domestic applications.
The thermostat setting can be adjusted between 60°C and 75°C by an electrician or other suitably
qualified trades person.
• The thermostat setting must only be adjusted by an Electrician or other
suitably qualified trades person.
• The access cover to the element and thermostat must only be removed by an
Electrician or other suitably qualified trades person.
Hot Water can cause scalds.
Children, disabled, and the elderly are at the
highest risk of being scalded.
Feel water temperature before bathing or
showering.
Scalds from hot water taps can result in severe
injuries to young children.
Scalds can occur when children are exposed
directly to hot water when they are placed into a
bath which is too hot.
DO
• Do stay with children
whenever they are in the
bathroom (Take the phone off
the hook).
• Do take them out of the
bathroom if you need to
answer the phone or door.
• Do test the temperature of the
water with your elbow before
placing your child in the bath.
• Do make sure that the tap is
turned off tightly.
• Do install a child proof tap
cover OR
• Do install a child resistant tap.
• Consider child-resistant taps or
tap covers, which prevent a
small hand being able to turn
on the tap.
• Consider installing tempering
valves or thermostatic mixing
valves which reduce the hot
water temperature delivered to
taps. Your local plumbing
authority may already require
that these be fitted. Contact
your installer or local plumbing
authority if in doubt.
DON’T
• DON’T leave a toddler
in the care of another
small child. The older
child may not have set
the water temperature
to a safe level.
NOTE
IMPORTANT INFORMATION
SAFETY
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SAFETY DEVICES
For safe operation this water heater is fitted with a combination Pressure & Temperature Relief
(P&TR) Valve, a thermostat and an over-temperature cutout for each heating element.
ANODE
The water heater is fitted with a sacrificial anode to extend it's life. It will slowly dissipate whilst
protecting the cylinder. The life of the water heater may be extended by arranging for an authorised
person to inspect the anode and replace it if required. It is recommended that the anode be inspected
at least every 5 years.
WATER QUALITY
The water quality of most public supplies is suitable for the water heating system. The water quality
from bore wells is generally unsuitable for the water heating system. Refer to the 'Warranty
Conditions' for water quality parameters and how they affect the warranty conditions. If in doubt about
the water quality, have it checked against the parameters listed in the warranty conditions.
If sludge or foreign matter is present in the water supply, a suitable strainer filter should be
incorporated in the water supply to the system.
TURNING ‘OFF’ THE WATER HEATING SYSTEM
If you plan to be away for only a few nights, we suggest you leave the water heating system switched
on. If it is necessary to switch off the water heater, the switch is usually marked and located in the
electricity meter box of the dwelling.
TURNING ‘ON’ THE WATER HEATING SYSTEM
Switch on the electric supply to the heating element. The switch is usually marked and located in the
electricity meter box of the dwelling. Water heating will now occur as required. It may take a number
of hours before hot water is available.
HOW THE WATER HEATER WORKS
A vitreous enamel lined steel cylinder stores water which is heated by an electric heating element
located at the base of the cylinder. An automatic thermostat controls the water temperature. The water
heater connects directly to the mains water supply.
The heating element can be connected to a Continuous or Off-Peak electricity supply. The continuous
supply is appropriate when the water heater capacity is less than the daily usage of hot water. The
Off- Peak supply is appropriate when the water heater capacity exceeds the daily usage of hot water.
The Off-Peak supply allows heating only for set periods and a volume of water sufficient for daily
usage is heated during the set period and stored. The Off-Peak supply is usually cheaper. Electricity
supply types and tariffs vary according to the local electricity authority.
• DO NOT tamper with or remove safety devices.
• DO NOT operate this water heater unless all safety devices are fitted and in working
order.
• DO NOT block or seal the P&TR Valve and drain pipe.
WARNING
IMPORTANT INFORMATION
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REGULAR CARE
Over flow tray and drain
The overflow tray and drain (if fitted) should be periodically checked to ensure there are no blockages.
Pressure and Temperature Relief (P&TR) Valve
This valve is located near the top of the water heater and is essential for safe operation. It is normal
for the valve to release a small quantity of water through the drain line during heating. However,
continuous leakage of water from the valve and its drain line may indicate a problem with the water
heater.
Expansion Control Valve (ECV) if fitted
Operate the easing lever on the expansion control valve once every six months. It is very important
you raise and lower the lever gently.
• Never block the outlet of the P&TR valve or its drain
line for any reason. The easing gear must be
operated at least once every six months or more
frequently in areas with a high incidence of water
deposits. It is very important you raise and lower the
easing gear gently.
• Failure to do this may result in the water heater
cylinder failing or under certain circumstances,
exploding.
• If the valve does not discharge water when the
easing gear lever is lifted, or does not seal again
when the easing gear is closed, attendance by an
authorised person must be arranged without delay.
The P&TR valve is not serviceable.
WARNING
WARNING
IMPORTANT INFORMATION
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