Rinnai Infinity EF24 User manual

Continuous ow
water heaters
Operation guide
For Rinnai continuous ow water heaters manufactured from 2010 onwards
(serial number 09.12-xxxxxx)

This appliance shall be installed in accordance with:
- Manufacturer’s installation instructions
- AS/NZS 5601 Gas Installations
- Local regulations and municipal building codes
Installation, servicing and repair shall be carried out only by authorised
personnel.
Internal Rinnai continuous flow water heaters must be installed with a
Rinnai approved flue system.
Not suitable as a spa or swimming pool heater.
All gas appliances require regular servicing. Servicing must be carried out
by an authorised person, being in New Zealand a licensed gasfitter.
Owner, please retain this manual for future reference.
Installer, please leave this manual with the owner.
Warning
Improper installation, adjustment, alteration, service or maintenance can
cause property damage, personal injury or loss of life.
Important:
For more information about buying, using, and servicing of Rinnai appliances
call: 0800 RINNAI (0800 746 624)
Rinnai New Zealand Limited
105 Pavilion Drive, Mangere, Auckland
PO Box 53177, Auckland Airport, Auckland 2150
Phone: [phone], Fax: [phone]
Email: [email protected].nz
Web: www.rinnai.co.nz, www.youtube.com/rinnainz

cnt:
About your water heater 4
Warning about water 5
General safety 6
General information 7
General controller information 8
Universal controller (Compact) 10
Kitchen Deluxe controller 11
Bathroom Deluxe controller 12
Troubleshooting 15
Service record 17
Draining your water heater 19
Installer details 21
Limited warranty 22
Proof of purchase 23

4 | Continuous Flow Water Heater Operation Guide 04-12
About your water heater
Before using or operating your water heater ensure your installer talks to you about the
use and care of this appliance, and that you understand these instructions.
Installer
The installer also needs to complete:
- their installer details (p. 20)
- the commissioning checklist supplied with the appliance—verifies the water heater has been installed and
commissioned correctly
The installer needs to leave the checklist, and operation guide with you.
Important
The Rinnai Infinity water heater requires power to prevent damage in freezing conditions. DO NOT disconnect
the power if there is a likelihood of freezing without draining the water heater. Instructions for draining the water
heater can be found at the back of this guide.
Principle of operation
If no controllers are fitted the opening of any hot water tap will automatically start the appliance. Once water is
flowing through the appliance the burner will be ignited by electronic ignition. If a controller is fitted it must be
switched on for the appliance to heat the water
When the hot water tap is closed and water flowing through the appliance has stopped the burner flame will
extinguish.
HOTHOT
COLDCOLD
ON!ON!
ON!ON!
HOTHOT
COLDCOLD
OFF!OFF!
OFF!OFF!
In the event of a power failure
The water heater will not operate without electricity. If power fails water heating will cease. When power is
restored the water flow may need to be stopped and restarted (and a controller, if fitted, switched on) in order for
water heating to continue.

Continuous Flow Water Heater Operation Guide 04-12 | 5
Warning about hot water
Excessively hot water is dangerous. Rinnai continuous flow water heaters, through the
use of water controllers, allow you to control the temperature of hot water to safe levels.
Water temperatures above 55 °C can cause instant severe burns, such as scalding and
may even result in death. Those most at risk; children, disabled, elderly, and the sick.
Hot water at 65 °C, a common water temperature in New Zealand, can severely burn
a child in less than half a second. At 55 °C, preset temperature for domestic Rinnai
continuous flow water heaters, it takes half a minute.
Always
- Test the water temperature with your elbow before placing your child in the bath,
and feel the water yourself before bathing or showering
- Supervise children whenever they are in the bathroom
- Make sure the hot water tap is turned off
Consider
Installing child proof tap covers or child resistant taps, both will prevent a child being
able to turn on the tap.
Never
Leave a toddler in the care of another child. They may not understand the need to
have the water temperatures set at a safe level.

6 | Continuous Flow Water Heater Operation Guide 04-12
General safety
Keep flammable
materials, spray cans,
fuel containers, pool
chemicals, trees,
shrubs etc. well clear
of the flue outlet.
Do not:
• Touch the unit
cover or the flue
outlet
• Insert objects into
the flue outlet
HOT!

Continuous Flow Water Heater Operation Guide 04-12 | 7
General information
Discolouration of flue outlets -
EF external models
The colour of the flue outlet
may change over time due to
condensate in the exhaust gases.
This is normal. The discolouration
will not damage the unit, and will
not affect performance of the
water heater.
Frost kits
Frost protection is fitted as
standard on all models. Frost
protection operates automatically,
as required, whenever the
appliance is connected to the
electric power supply.
If power has failed and there is risk
of damage from frost, turn off the
gas supply to the unit and open a
tap slightly to allow flow through
the unit. This may prevent damage
from freezing.
If the appliance is not going to
be used for an extended period
and the electric power supply is
disconnected, turn off the water
and gas supplies and arrange for
your plumber to drain all water
from the appliance to prevent frost
damage. If for practical reasons
a plumber is unable to drain your
system, we have an instruction
sheet on how to drain the unit at
the back of this guide.
Installation by a licensed
tradesperson
Improper installation, adjustment,
service, or maintenance can
cause serious injury, property
damage, or death. Please ensure
your installation is completed by a
licensed gasfitter and plumber.
Safety devices
Your Rinnai continuous flow water
heater has the following safety
devices:
- Flame failure
- Boil-dry protection
- Overheat protection (OHS)
- Fusible link
- Pressure relief valve
- Combustion fan rpm check
Servicing
Rinnai has a service and spare parts
network with personnel who are
fully trained and equipped to give
the best advice on your Rinnai
appliance. If your appliance needs
servicing, please call Rinnai
(0800 746 624) from a land line
and select option one for a service
centre in your area.
For reliable operation Rinnai
continuous flow water heaters
in domestic applications should
be serviced every three years,
including inspection of the flue
system (if installed). A service
record has been provided at
the back of this guide. For
commercial use annual servicing
is recommended. Rinnai has a
recommended ‘Commercial
Maintenance and Servicing
Schedule’. This is available on
request, or via our website.
Regular servicing is not covered
by the Rinnai warranty. Do not
attempt to carry out any service
work other than that mentioned in
the troubleshooting section. If you
have any other faults or problems,
please contact your installer or
Rinnai.
Solar installations
There is a
recommended
system layout for
Rinnai continuous
flow water heaters
used in solar
installations. It is important your
installer configures your solar
system correctly as water heaters
in solar installations produce
higher than normal temperatures.
Rinnai water controllers cannot be
used with Rinnai continuous flow
water heaters in solar installations
as the hot water does not always
pass through the continuous flow
unit.
Preset temperatures
The Rinnai continuous flow
water heaters are factory preset
to a temperature limit of 55 °C ,
excluding one commercial model,
the Infinity HD200 external.
Temperature controllers are
available to allow precise digital
temperature control—a great
safety feature if you have young
children. Controllers can be
fitted at any time (except in solar
installations) after installation of
the hot water unit.
Water flow
The flow will
vary slightly
depending on
the incoming
water
temperature
and temperature selected. For
example, the water flow will be
higher at 43 °C than at 55 °C.
There is also a minimum flow rate
required for the continuous flow
unit to start, so if a hot water tap is
only opened a fraction, there may
not be enough flow to start the
unit.
Flue outlet
Filter
Drain
Gas
Valve
GasColdHot
Turn Water Off
Turn Gas Off
Drain Water
43°C
55°C

8 | Continuous Flow Water Heater Operation Guide 04-12
General controller information
While hot water
outlets are open the
set temperature may
be lowered BUT not
raised above 43 °C.
Transfer of priority
between controllers
is not possible.
These are safety
features.
Max.
43°C
To clean your water
controller, use a soft
damp cloth and mild
detergent.
DO NOT use solvents.
S
O
L
V
E
N
T
Depending on
weather conditions
and the length of
pipe between the
hot water unit and
the outlet in use,
there may be a
variation between the
temperatures displayed at the water controller
and water outlet.
49°C
50°C
There is no need to
turn water controllers
off after use.
As a safety
precaution, if a
kitchen controller
temperature is set
above
50 °C, transferring
and then returning
priority will result
in a default set
temperature of 50 °C. This is a safety feature.
Kitchen Kitchen
Bathroom
Do not push the
On/Off button
on any controller
when the red
water heater ‘In
Use’ indicator is
on. This will turn
off the water
heater causing the
water to go cold.
Temperatures higher than
55 °C should not be able to be
selected on controllers installed
in bathrooms, ensuites or toilets.
This is to reduce the risk of burns
from hot water. If this is not the
case, the controllers have been
incorrectly installed and you should contact your
installer.
Check the water
temperature before
use. A parent
or carer should
ALWAYS check the
temperature before
a child is placed in
contact with hot
water.

Continuous Flow Water Heater Operation Guide 04-12 | 9
When used correctly, the hot
water unit will deliver the selected
temperature, even when the water
flow is varied, or when more than
one tap is in use.
Each water controller can be
individually programmed, however
the water heater can only deliver
one set temperature at any time.
The available temperatures are
shown in the table below.
Rinnai controllers
- Universal (Compact),
temperature selection only
- Kitchen Deluxe, temperature
selection and voice prompting
- Bathroom Deluxe,
temperature selection, shower
saver, bath fill, and voice
prompting
- Wireless, temperature
selection only
Controller configurations
A maximum of four water
controllers can be fitted with a
combination of wired and wireless
controllers, with the following
limitations:
- maximum of one Kitchen
Deluxe controller (MC-100V)
- maximum of two Bathroom
Deluxe controllers (BC-100V)
Only one controller can be set
to deliver 55 °C, this cannot be a
Bathroom Deluxe controller.
Controllers need to be turned on
for delivery of hot water
The water heater will not heat
water unless the controller(s)
are turned on. If water is flowing
before a controller is turned on,
the water heater will not heat the
water. Turn off the tap for a few
seconds then turn on again.
Ignition problems
If the water heater fails to ignite,
the ‘In Use’ indicator will not
illuminate. The water heater will
not attempt re-ignition until water
flow is stopped for a few seconds
and then restarted.
When gas bottles have been
changed or the gas supply is
disrupted (controller may display
error code 11 or 12) ignition may
fail and the ‘In Use’ indicator wont
be on. The water flow may need to
be stopped and restarted several
times before the appliance will
remain alight.
Water controllers are an optional extra. They allow precise temperature control—no
need to mix hot and cold water.
Controllers - available temperatures
Kitchen Domestic
Commercial
37, 38, 39, 40, 41, 42, 43, 44,
45, 46, 48, 50, 55 °C
60, 65, 75 °C
Bathroom (hot water) 37, 38, 39, 40, 41, 42, 43, 44,
45, 46, 48, 50 °C
Bathroom (bath fill) 37, 38, 39, 40, 41, 42, 43, 44,
45, 46, 47, 48 °C
Suggested temperatures Kitchen
Shower
Bath fill
50-55 °C
37-43 °C
39-45 °C
To obtain water temperatures lower than 37 °C add cold water.

10 | Continuous Flow Water Heater Operation Guide 04-12
Universal controller (Compact)
Turning on
If the water controller is switched
off (no digits displayed in the
digital window) press the On/Off
button once. The On indicator
will illuminate, indicating the
continuous flow water heater will
be ready to supply hot water once
a hot water tap is opened.
Adjusting the temperature
Select the desired temperature
using the ‘Hot water temp.’ up and
down buttons until the required
temperature is displayed.
To operate the continuous flow
water heater, open any hot water
tap. This will automatically light the
burner providing hot water. The
water heater ‘In Use’ indicator will
illuminate on the water controller.
Once the hot water is running,
if the set temperature is either
too hot or cold, press the ‘Hot
water temp.’ up or down buttons
until the desired temperature is
reached.
Muting the ‘beep’ sound
The ‘beep’ sound can be muted by
pressing the ‘Hot water temp.’ up
and down buttons simultaneously
for more than three seconds.
How to use two or more
Compact controllers
Turning on
If the controllers are switched off,
press the On/Off button once.
The On indicator on the desired
controller will illuminate, indicating
that the hot water unit will be
ready to supply hot water once a
hot water tap is opened.
Transferring priority
An illuminated On/Off indicator
confirms that the desired
controller is in control of the water
delivery temperature. If the On/
Off indicator is not illuminated
press the ‘Transfer’ button once
(while water is not flowing). The
On/Off indicator on the controller
will illuminate indicating that the
hot water temperature control has
been transferred to this controller
and that the continuous flow water
heater will be ready to supply hot
water.
Adjusting the temperature
Select the desired temperature
using the ‘Hot water temp.’ up and
down buttons until the desired
temperature is displayed.
Once the hot water is running, if
the set temperature is too hot or
cold, press the ‘Hot water temp.’
up and down until the desired
temperature is reached.
With the water running the
temperature can be adjusted down
as desired, but as a safety feature,
can only be adjusted up as far as
43 °C. To increase the temperature
above 43 °C, first stop the water
flow.
WATER HEATER
'In Use' INDICATOR
DIGITAL MONITOR
TEMPERATURE
CONTROL BUTTONS
CONTROLLER
ON INDICATOR
TRANSFER BUTTON
ON/OFF BUTTON
Indicates that a water
heater is in operation and
delivering hot water.
Indicates the temperautre
selected. Error message will
flash in event of fault.
Used to select water temperature.
Indicates if this temperature
controller is in control of
water delivery temperature.
Used to transfer control priority
between the controllers.
The controller with
priority has command of the
hot water delivery temperature.
Used to switch the water
heater on and off.
HOT WATER

Continuous Flow Water Heater Operation Guide 04-12 | 11
Kitchen Deluxe controller
The Kitchen Deluxe controller is not water resistant, avoid direct exposure to water or
steam as these conditions may cause damage.
ON/OFF BUTTON
DIGITAL
MONITOR
WATER HEATER
'In Use' INDICATOR
SPEAKER
UP AND DOWN BUTTONS
MODE BUTTON
WATER TEMPERATURE
INDICATOR SHOWER SAVER / BATH FILL INDICATOR
CLOCK
TRANSFER BUTTON
Indicates that the Shower Saver /
Bath fill function is operating.
Indicates the selected hot water
temperature.
Used to switch the water heater on and
off. This button is illuminated when the
water heating system is on.
When in normal mode these
buttons are used to select the
water temperature.
In setup mode these buttons are
used to adjust the voice prompt
volume and set the clock.
Used to switch the controller
between normal, voice or clock
modes.
Used to transfer control priority
between the controllers. The
controller with priority has
command of the hot water
delivery temperature. This button
is illuminated when this controller
has priority.
Indicates the water heater is in
operation and delivering hot water.
12 Hour AM/PM clock display.
In the event of a fault, error
messages will flash here.
Turning on
If the water controller is switched
off (no digits displayed in the
digital window) press the On/Off
button once.
The On indicator will illuminate,
indicating the continuous flow
water heater will be ready to supply
hot water once a hot water tap is
opened.
If more than one controller is fitted
press the ‘Transfer’ button once
to transfer priority to the desired
controller.
Setting the clock
The clock is a 12 hour AM/PM
display. To set the time press the
‘Mode’ button twice. In the digital
monitor the word ‘Clock’ will be
displayed and the clock digits will
flash, if this is the first time the
clock has been set the starting
time will be AM 12:00.
Use the up and down buttons to
select the desired time. Holding
these buttons down continuously
cycles the digits. When you get
close to the time you wish to set,
press the button intermittently
to avoid going further than the
desired time.
To return to normal mode,
press the ‘Mode’ button once.
If no buttons are pressed for
approximately 10 seconds the
controller will return to normal
mode.
The time is always displayed
regardless of whether the
controller is turned On or Off.
The clock may need resetting
if power to the water heater is
disrupted due to a power failure or
if the power is switched off over a
prolonged period.
Setting the sound options
Voice prompts are only available
when Bathroom Deluxe controllers
are installed. To set the sound
options press the ‘Mode’ button
once to place the controller into
voice mode. Use the up and down
buttons to select the audible
setting as follows:
- Voice high, med., low or off,
sets the voice prompt volume
but does not affect the ‘beep’
sound when pressing the
buttons.
- Sound off mutes all voice
prompts and audible tones.
To return to normal mode, press
the ‘Mode’ button once, if no
buttons are pressed for approx. 10
seconds the controller will return
to normal mode.
Adjusting the temperature
Select the desired temperature
using the ‘Hot water temp.’ up and
down buttons until the required
temperature is displayed.
Once the hot water is running, if
the set temperature is too hot or
cold, press the ‘Hot water temp.’
up and down buttons until the
desired temperature is reached.
With the water running the
temperature can be adjusted down
as desired, but as a safety feature
can only be adjusted up as far as
43 °C. To increase the temperature
above 43 °C, first stop the water
flow.

12 | Continuous Flow Water Heater Operation Guide 04-12
Bathroom Deluxe controller
Avoid getting water directly into the speaker as this may cause damage.
SOUND VOLUME BUTTON
SHOWER SAVER
/ BATH FILL BUTTON
ON/OFF BUTTON
Used to select clock setting mode.
Used to select voice and audible tone
options.
CLOCK SETTING BUTTON
WATER VOLUME BUTTONS
Used to select Shower Saver/Bath Fill
volumes.
TEMPERATURE BUTTONS
CLOCK & REMINDER VOLUME
INDICATOR
SPEAKER
TRANSFER BUTTON DIGITAL
MONITOR
WATER HEATER ‘In Use’
INDICATOR
SHOWER SAVER / BATH FILL
INDICATOR
WATER TEMPERATURE
INDICATOR WATER VOLUME INDICATOR
Indicates the selected hot water
temperatures.
Indicates the water heater is in
operation and delivering hot water.
Indicates Shower Saver/Bath Fill volume
selected. Used to selected Shower Saver/Bath Fill
function.This button is illuminated when
this function is selected.
Used to switch the water heater on and
off. This button is illuminated when the
water heater is on.
Indicates the Shower Saver/Bath Fill
function has been selected and that a
shower is running or the bath is filling.
Used to transfer priority between
controllers. The controller with priority
has command of the hot water
temperature. This button is illuminated
when the controller has priority.
12 hour AM/PM clock display.
Indicates how much water still needs to
flow for the selected Shower Saver/Bath
Fill volume, decreasing while the shower
runs or the bath fills.
In the event of a fault, error message
codes will flash here.
In normal Shower Saver/Bath Fill modes
these buttons are used to select the
water temperature.
In clock mode these buttons are used to
set the clock.-
Turning on
If the water controller is switched
off (no digits displayed in the
digital window) press the On/Off
button once.
The On indicator will illuminate,
indicating the continuous flow
water heater will be ready to supply
hot water once a hot water tap is
opened.
If more than one controller is fitted
press the ‘Transfer’ button once
to transfer priority to the desired
controller.
Setting the clock
The clock is a 12 hour AM/PM
display. To set the time press the
‘Clock’ button once. In the digital
monitor the clock digits will flash,
if this is the first time the clock has
been set the starting time will be
AM 12:00.
Use the up and down buttons to
select the desired time. Holding
these buttons down continuously
cycles the digits. When you get
close to the time you wish to set,
press the button intermittently
to avoid going further than the
desired time.
To return to normal mode,
press the ‘Clock’ button once.
If no buttons are pressed for
approximately 10 seconds the
controller will return to normal
mode.
The time is always displayed
regardless of whether the
controller is turned On or Off.
The clock may need resetting
if power to the water heater is
disrupted due to a power failure or
if the power is switched off over a
prolonged period.

Continuous Flow Water Heater Operation Guide 04-12 | 13
Setting the sound options
Voice prompts are only available
when Bathroom Deluxe controllers
are installed. To set the sound
options press the ‘Mode’ button
once to place the controller into
voice mode. Use the up and down
buttons to select the audible
setting as follows:
- Voice high, med., low or off,
sets the voice prompt volume
but does not affect the ‘beep’
sound when pressing the
buttons.
- Sound off mutes all voice
prompts and audible tones.
To return to normal mode,
press the ‘Mode’ button once,
if no buttons are pressed for
approximately 10 seconds the
controller will return to normal
mode.
Adjusting the temperature
Select the desired temperature
using the ‘Hot water temp.’ up and
down buttons until the required
temperature is displayed.
Once the hot water is running, if
the set temperature is too hot or
cold, press the ‘Hot water temp.’
up and down buttons until the
desired temperature is reached.
With the water running the
temperature can be adjusted down
as desired, but as a safety feature
can only be adjusted up as far as
43 °C. To increase the temperature
above 43 °C, first stop the water
flow.
Operating the shower saver and
bath fill
Initial settings:
- Temperature: 40 °C
- Volume: 100 L
(range 30-400 L)
Setting shower/bath
temperature and volume
With the system on, select a Deluxe
Bathroom Controller. If it does not
have priority, press the ‘Transfer’
button once and the ‘Transfer’
button will illuminate.
Press ‘Shower Saver/Bath Fill’
button once. The button will
illuminate and voice prompt and
tone will sound. Ensure you have
the voice and sound turned on.
To select the desired delivery
temperature use the ‘Temperature’
up and down buttons. The selected
temperature will be displayed on
the digital monitor and will remain
as the default ‘Shower Saver/Bath
Fill’ temperature until it is changed
or if the mains power is turned off
for an extended period.
When filling a bath for the first
time, it is recommended that a low
bath fill volume such as 60 litres or
lower be used. During subsequent
bath fills the volume can then be
adjusted to suit your known bath
volume or desired fill level.
A volume counter (to highlight
remaining volume of water to
be delivered) displays on the
controller below the temperature
display (replaces the clock during
‘Shower Saver/Bath Fill’ operation).
When filling the bath or if the
water has been turned off
Be careful not to overfill the bath,
an average bath volume is
160 litres. It is recommended that
when filling a bath for the first time
you should:
- remain by the bath during the
filling process
- use a low bath fill volume such
as 60 litres or less
If the ‘Shower Saver/Bathfill’ is
interrupted (water is turned off)
for any reason and there is more
than half the volume of the set
amount of water delivered, the
‘Shower Saver/Bath Fill’ will reset
itself back to normal operation
when turned on again.
For example:
Set
volume
Delivered
volume
interrupted*
Delivered
volume
restarted**
160 L 50 L 110 L
160 L 110 L Resets***
* Bath fill interrupted—tap closed
** Bath fill restarted—tap turned
on again
*** Resets back to normal
operation
Using shower saver/bath fill
Press the ‘Shower Saver/Bath
Fill’ button once. The button will
illuminate and a voice prompt
and tone will sound. During
‘Shower Saver/Bath Fill’ operations
the ‘Bath’ indicator will also be
displayed on the Kitchen Deluxe
Controller digital monitor (when
fitted).
The voice prompt will say “The hot
water system is ready. Open the
hot water tap”. Open the hot water
tap for the shower or bath.
The ‘In Use’ indicator will illuminate
on all deluxe water controllers and
the shower will run or the bath will
start to fill.
To stop shower saver/bath fill
operations
If you wish to stop the water flow
while the shower saver/bath fill
function is in operation, press the
‘Shower Saver/Bath Fill’ button.
The button will flash and the
voice prompt will say “Hot water
is not available. Turn off all hot
water taps and push the ‘Bath Fill’
button”. Follow the voice prompt
instructions.

14 | Continuous Flow Water Heater Operation Guide 04-12
When the shower saver/bath fill
operation finishes
Once the shower saver/bath fill
operation finishes, the following
occurs:
1. Flow from the shower/bath
hot water tap stops.
2. ‘Shower Saver/Bath Fill’ button
will flash.
3. Kitchen Deluxe Controller
(if fitted) ‘Bath’ indicator will
flash.
4. A tone will sound.
5. The voice prompt will say
“Bath fill is complete. Turn off
the bath hot water tap and
push the ‘Bath Fill’ button.
Follow the voice prompt
instructions. Note, the water
heater will not allow hot water
to flow from any fixture until the
‘Shower Saver/Bath Fill’ button has
been pressed.
Using multiple controllers
The water heater can be turned
on and off at any water controller.
If more than one controller is
fitted, press the ‘Transfer’ button
to transfer priority to the desired
water controller.

Continuous Flow Water Heater Operation Guide 04-12 | 15
Troubleshooting with controllers
Common
error codes
Fault Possible solution
- Noticeable reduction in water flow Inlet water filter needs to be cleaned—service
call.
03 Power interruption during bath fill, water
will not flow when power is back on
Turn off all hot water taps and press On/Off
twice.
10 Air intake or flue blocked Service call.
11 No ignition, no gas supply Check gas is turned on at water heater and gas
meter, or cylinder.
12 Flame failure, low gas flow Check gas is turned on at the water heater
and gas meter or cylinder. Check there are no
obstructions to the flue outlet.
14 Overheat thermal fuse Service call.
16 Over temperature warning Service call.
25 Condensate trap error Check condensate drain for blockage.
32 Outgoing water temperature sensor faulty Service call.
33 Heat exchanger outlet sensor faulty Service call.
34 Air temperature sensor faulty (internal
models only)
Service call. Will require; checking sensor wiring
for damage, measuring resistance of sensor,
checking combustion fan, checking internal
flue leakage, checking flue system integrity, and
possibly replacing sensor.
52 Gas modulating valve faulty Service call.
61 Combustion fan failure Service call.
65 Water flow control faulty—does not stop
flow properly
Service call.
71 Microprocessor failure Service call.
72 Microprocessor failure Service call.
LC Scale build-up in heat exchanger—when
checking maintenance code history, 00 is
substituted for LC
Service call.
In all cases you may be able to clear the error code by turning the hot water tap off, then on again. If this does not
clear the error code, try pushing the On/Off button Off, then On again. If the error code remains, contact Rinnai
for advice.
With controllers or status monitor
Your Rinnai continuous flow water heater has a self diagnostic capability. If a fault occurs, an error code will flash
on the digital monitor (if you have water controllers) or status monitor (selected models only). This assists with
diagnosing the fault and may enable you to overcome a problem without a service call. Please quote the code
displayed when contacting Rinnai.

16 | Continuous Flow Water Heater Operation Guide 04-12
Troubleshooting without controllers
Fault Possible solution
Unit does not start Check power is on at the unit. Check gas isolation
valve at the unit and gas meter are fully open.
Unit starts and then shuts down immediately Check power is still on. Check gas isolation valve at
the unit and gas meter are fully open. Open your hot
water tap fully.
Unit starts then water goes cold Check power is still on. Open hot water tap fully.
Excessive temperature fluctuation while water is
flowing
Service call
Excessive noise or vibration from the water heater Service call
Faults caused by insufficient gas supply, insufficient water supply, gas quality, water quality, installation errors or
operation errors are not covered by the Rinnai warranty.

Continuous Flow Water Heater Operation Guide 04-12 | 17
Service record Model:_____________________________________
Serial Number:______________________________
Service 1 Date
Company
Address
Phone
Contact
Comments
Service 2 Date
Company
Address
Phone
Contact
Comments
Service 3 Date
Company
Address
Phone
Contact
Comments
Service 4 Date
Company
Address
Phone
Contact
Comments
Service 5 Date
Company
Address
Phone
Contact
Comments
Service 6 Date
Company
Address
Phone
Contact
Comments
Service 7 Date
Company
Address
Phone
Contact
Comments
Service 8 Date
Company
Address
Phone
Contact
Comments
For domestic use Rinnai recommends servicing every three years. For commercial use annual servicing is
recommended.

18 | Continuous Flow Water Heater Operation Guide 04-12
Service record - parts replaced
Unit Run Hours /
Ignition Cycles
Part Replaced Reason Date Company
All parts must be replaced with genuine replacement parts available from Rinnai.

Continuous Flow Water Heater Operation Guide 04-12 | 19
Draining your water heater
Frost protection is fitted as standard on all models manufactured from 2010 onwards.
Frost protection operates automatically (as required) whenever the appliance is
connected to the electric power supply.
If you live in an area prone to frost
and will be away for an extended
period with the power supply
disconnected, Rinnai recommend
draining your appliance to prevent
frost damage (not covered by
warranty).
We strongly recommend having
your water heater drained
by a plumber or gasfitter but
understand that remote locations
and cost may prohibit this.
About this instruction
These instructions are intended
as a guide only. Rinnai will not
accept liability for issues arising
from the use of this information.
In particular Rinnai will not be
responsible for damage caused
by water freezing where this
procedure was followed and
sufficient water failed to drain from
the unit.
Instructions
You will need:
- A bucket if water cannot be
drained into a garden or drain
- Approx. 15 minutes (to
complete)
To avoid burns wait until
the water heater cools
before draining the water
as hot water may drain
from the unit if there has
been recent hot water use.
1. Turn off any water controllers
in the building and then turn
off the water, gas, and power
at the unit.
2. To flush the water heater
open all hot water taps in the
building. Refer to picture on
next page.
3. If required, place the bucket
under the unit and unscrew
the water filter and hot water
drain plug. If you have an EF
continuous flow water heater
you will also need to unscrew
the condensate trap and water
drain plugs.
4. Drain the water heater—can
hold up to one litre of water
and surrounding pipes.
Refilling your water heater
1. Check that the gas and power
is turned off. Turn off any open
hot water taps.
2. Insert the condensate trap
plug, screw in the water heater
drain plugs and the water filter
in the cold water inlet.
3. Turn on the cold water at the
continuous flow water heater.
4. Turn on the hot tap to purge
air from the pipe work and
unit.
5. Turn off the hot tap.
6. Turn on the gas and power
at the continuous flow water
heater and turn on any
temperature controllers in the
building.
When the water heater or
external pipes have frozen
DO NOT operate the water heater
if it or the external pipes have
frozen. Close the gas and water
valves and turn off the power. Wait
until the water thaws, check this by
opening the water supply valve.
Check the water heater and pipes
for leaks.
WARNING
Filter
Drain
Gas
Valve
GasColdHot
Turn Water Off
Turn Gas Off
Drain Water

20 | Continuous Flow Water Heater Operation Guide 04-12
Line drawing showing the different connections
underneath a continuous flow unit
Water
plug*
Water
filter
Condensate
trap drain plug*
Hot water
outlet Hot water drain plug
Cold water
inlet
drain
* Condensate trap and water drain plugs—EF
models only.
Wash hands after dealing with condensate
as it is mildly acidic.
Photos highlighting connections that need to
be drained