Rinnai INFINITY A Series User manual

INFINITY continuous flow water heaters
Operation guide

Important
This guide is applicable for continuous ow water heaters manufactured
from 2019 onwards serial number 18.12-xxxx.
This appliance must be installed in accordance with:
-Manufacturer’s installation instructions
-Current AS/NZS 3000, AS/NZS 3500, AS/NZS 5601.1 and G12/AS1
For use with Natural Gas or Universal LPG as indicated on the
appliance.
Not suitable as a spa or swimming pool heater.
Not suitable for hydronic applications.
A-Series models are not suitable for solar installations.
Appliance must be installed, commissioned and serviced by an
authorised person, being in New Zealand a licensed gastter.
Warning
Improper installation, adjustment, alteration, service and maintenance
can cause property damage, personal injury or loss of life.
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]
Web: rinnai.co.nz
youtube.com/rinnainz
facebook.com/rinnainz

Continuous ow water heaters, like cars, require regular maintenance and
servicing. For reliable operation Rinnai INFINITY continuous ow water heaters,
in residential applications, should be serviced every two years.
Warning about hot water ......................................4
Safety and important messages ...........................4
About your water heater .......................................5
General information ..............................................6
INFINITY controllers .............................................7
Troubleshooting without controllers ......................8
Troubleshooting with controllers ...........................8
Draining the water heater .....................................10
Limited Warranty ..................................................12
Water quality .........................................................14
Purchase details ...................................................15
Installer details......................................................15
Contents

4 | Rinnai INFINITY operation guide 02-20
Warning about hot water
Excessively hot water is dangerous. Rinnai INFINITY continuous ow water heaters, through the
use of water controllers, allow you to control the temperature of hot water to safe levels.
DANGER BEWARE OF
SCALDING HAZARDS
HOT!
HOT!
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 o󰀨.
Consider
Installing child proof tap covers or child resistant taps, both will
prevent a child being able to turn on a tap.
Never
Leave a toddler in the care of another child. They may not
understand the need to have the water temperature set at a safe
level.
Safety and important messages
This appliance is not intended for use by persons (including children) with reduced physical,
sensory or mental capabilities, or lack of experience and knowledge, unless they have been given
supervision or instruction concerning use of the appliance by a person responsible for their safety.
Children should be supervised to ensure they do not play with the appliance.
If the supply cord is damaged, it must be replaced by a licensed tradesperson. This must
be a genuine replacement part available from Rinnai.
DO NOT:
• Touch the unit cover or the ue outlet
• Insert objects into the ue outlet
• Spray water directly into the ue outlet
• Spray aerosols in the vicinity of this appliance while it is operating
• Use or store ammable materials near this appliance
• Place articles on or against the water heater
• Store pool chemicals near this appliance
• Modify this appliance
Keep trees, shrubs, and other obstructions well clear of the ue outlet.

Rinnai INFINITY operation guide 02-20 | 5
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.
Your installer needs to complete:
• Their details at the back of this guide
• The commissioning checklist supplied with the unit—this veries the water heater has been
installed and commissioned correctly
The installer needs to leave the commissioning checklist and this operation guide with you.
Damage prevention in freezing conditions
The Rinnai INFINITY water heaters require 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 on p.10.
How the water heater operates
The burner lights automatically when the hot water tap is opened, and goes out when the tap is
closed. Ignition is electronic, there is no pilot light. When the hot water tap is o󰀨 there is no gas
used.
In the event of a power failure
The water heater will not operate without electricity. If the power fails water heating will cease.
When the power is restored the water ow may need to be stopped and restarted (and a controller,
if tted, switched on) in order for water heating to continue.
Water ow
The ow will vary slightly depending on the incoming water temperature
and temperature selected. For example, the water ow 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.
IMPORTANT
43 °C 55 °C

6 | Rinnai INFINITY operation guide 02-20
General information
Frost protection
Frost protection is tted as standard on
all models. Frost protection operates
automatically, as required, whenever the
appliance is connected to power.
If the power has failed and there is a risk of
damage from frost, turn o󰀨 the gas supply to
the unit and open a tap to allow ow through
the unit, this may prevent damage from
freezing.
If the INFINITY is not going to be used for a
period and the power supply is disconnected,
turn o󰀨 the water and gas supplies, and
arrange for a plumber to drain the water to
prevent frost damage. If for practical reasons a
plumber is unable to drain the INFINITY, there
is an instruction on p.10.
Installation by a licensed tradesperson
Only a licensed tradesperson can install,
adjust, maintain, and service this water heater.
Any work carried out by a non-licensed
tradesperson is illegal and will void any
warranty.
Safety devices
The Rinnai INFINITY has the following safety
devices tted:
• ame failure
• boil-dry protection
• overheat protection (OHS)
• fusible link
• pressure relief valve
• combustion fan rpm check
Discolouration of ue outlets
The colour of the ue 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 a󰀨ect the
performance of the water heater.
Environmental
The Rinnai INFINITY is
manufactured from a number of
recyclable materials. At the end
of its useful life please consider
what parts could be recycled, for
example scrap metal, PCB etc.
Servicing
Rinnai has a maintenance, service and spare
parts network with personnel who are fully
trained and equipped to give the best advice on
your Rinnai appliance.
Servicing and repair should only be carried out
by authorised personnel, please call Rinnai
(0800 746 624).
For reliable operation Rinnai INFINITY water
heaters in residential applications should be
serviced every two years*.
Regular maintenance and servicing is not
covered by the Rinnai warranty. Do not attempt
to carry out any service work other than that
mentioned in this guide. If you have any other
faults or problems, please contact your installer
or Rinnai.
* Including the ue system if you have an internal unit
* Installations located in or near coastal areas may require
additional maintenance due to corrosive airborne ocean salt
INFINITY controllers
Temperature controllers are available
to allow precise digital temperature
control—a great safety feature if you
have young children. Controllers can
be tted at any time during or after
installation of the Rinnai INFINITY.
Solar installations
There is a recommended solar layout for
continuous ow water heaters used in solar
installations. It is important your installer
congures your solar system correctly as water
heaters in solar installations produce higher
than normal temperatures.
INFINITY controllers cannot be used with
Rinnai continuous ow water heaters in solar
installations as the hot water does not always
pass through the unit.
The A-Series range of water heaters are not
suitable for solar installations as they cannot be
set to 75 °C.
Flue outlet

Rinnai INFINITY operation guide 02-20 | 7
INFINITY controllers
Water controllers are an optional extra. They allow precise temperature control—no need to mix
hot and cold water.
General controller information
When used correctly the Rinnai INFINITY, when
combined with digital controllers will deliver the
selected temperature at the controller, even
when the water ow varies, or when more than
one tap is in use.
Each digital water controller can be individually
programmed, though the INFINITY can
only deliver one set temperature at a time.
For example, someone is showering at a
temperature of 43 °C, and another person uses
the kitchen tap. The kitchen tap can only deliver
43 °C until the person in the shower is nished.
Available Rinnai controllers
• Compact, temperature selection only
• Kitchen Deluxe, temperature selection and
voice prompting
• Bathroom Deluxe, temperature selection,
shower saver, bath ll, and voice prompting
Controller congurations
A maximum of four (three for the N-Series)
water controllers can be tted, with the
following provisos:
• Only one Kitchen Deluxe controller can be
tted. A Kitchen Deluxe is only installed if a
Bathroom Deluxe controller is installed.
• Only two Bathroom deluxe controllers can
be tted.
• Only one controller can be set to deliver
55 °C, this cannot be the controller in the
bathroom.
Controllers need to be turned on
The Rinnai INFINITY will not heat the water
unless the controller(s) are turned on. If water
is owing before a controller is turned on, the
Rinnai INFINITY will not heat the water. Turn o󰀨
the tap for a few seconds then turn on again.
Ignition problems
If the Rinnai INFINITY fails to ignite the ‘In
Use’ indicator will not illuminate. The Rinnai
INFINITY will not attempt re-ignition until the
water ow 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 won’t be on. The water ow may
need to be stopped and restarted several times
before the appliance will operate.
Available temperatures on controllers (°C)
Kitchen (domestic) 37, 38, 39, 40, 41, 42, 43,
44, 46, 48, 50, 55
Kitchen (commercial) 60, 65, 75
Bathroom (hot water) 37, 38, 39, 40, 41, 42, 43,
44, 45, 46, 48, 50
Bathroom (bathll) 37, 38, 39, 40, 41, 42, 43,
44, 45, 46, 47, 48
For water temperatures lower than 37 °C, add
cold water.

8 | Rinnai INFINITY operation guide 02-20
Troubleshooting without controllers
Fault Possible solution
Unit doesn’t start Check power is on at the unit. Check the gas isolation
valve at the unit and gas meter are fully open.
Units starts and then immediately
shuts down
Check power is on at the unit. Check the gas isolation
valve at the unit and gas meter are fully open. Open your
hot water tap fully.
Excessive temperature uctuation
while the water is owing
Service call
Excessive noise or vibration from the
water heater
Service call
Faults caused by insu󰀩cient gas supply, insu󰀩cient water supply, gas quality, water quality,
installation errors or operation errors are not covered by warranty.
Troubleshooting with controllers
Error
code
Fault Possible solution
-Noticeable reduction in water ow Inlet water lter needs to be cleaned—service
call.
03 Power interruption during bathll, water
will not ow when the power is back on
Turn o󰀨 all hot water taps and press On/O󰀨
twice.
05 Bypass ow control failure Service call
10 Air intake or ue blocked Service call
11 No ignition, no gas supply Check gas is turned on at the water and gas
meter, or cylinder.
12 Flame failure, low gas ow Check gas is turned on at the water heater
and gas meter, or cylinder. Check there are no
obstructions to the ue outlet.
14 Heat exchanger thermistor failure Service call
15 Venturi control failure Service call
Rinnai INFINITY continuous ow water heaters have self-diagnostic capability. If a fault occurs,
an error code will ash in the digital water controllers (or status monitor on selected models). This
assists in diagnosing the fault—please state the code displayed when contacting Rinnai.
In all cases you may be able to clear the error code by turning the hot water tap o󰀨, then on again.
If this does not clear the error code, trying pushing the On/O󰀨 button O󰀨, then On again. If the error
code remains, contact Rinnai for advice.

Rinnai INFINITY operation guide 02-20 | 9
Error
code
Fault Possible solution
16 Over temperature warning Service call
17 Venturi blockage Service call
19 Electrical earthing fault Service call. Will require checking the harness
and remote controller cable.
21 A-Series - dip switch setting fault
N-Series - data transfer error
Service call
25 Condensate trap error Check condensate drain for blockage
32 Outgoing water temperature sensor
faulty
Service call
33 Heat exchanger thermistor failure Service call
34 Combustion air temperature sensor
failure (internal models only)
Service call. Will require; checking sensor wiring
for damage, measuring resistance of sensor,
checking combustion fan, checking internal ue
leakage, checking ue system integrity, and
possibly replacing sensor.
38 Exhaust thermistor failure Service call
41 Freeze protection thermistor failure Service call
51 Inlet thermistor failure Service call
52 Gas modulating valve faulty Service call
54 High exhaust gas temperature failure Service call
55 Scheduled service reminder1Service call
61 Combustion fan failure Service call
65 Water ow control failure—does not
stop ow properly
Service call
70 PCB failure Service call
71 Solenoid valve circuit failure Service call
72 Flame rod failure Service call
LC Scale build-up in heat exchanger—
when checking maintenance code
history, 00 is substituted for LC
Service call
5E Cascade diagnostic display. Displays
5E when an error code displays on
any secondary unit with a cascade
connection.
Service call
1Service reminder: Rinnai recommends commercial appliances are serviced annually. N-series models display a
scheduled service reminder code 55 (when programmed to do so) when the annual service period has elapsed as a
reminder that the water heater is due to be serviced. The reminder code ashes intermittently on the status monitor and
water controllers (if tted)—normal operation of the appliance is not a󰀨ected.

10 | Rinnai INFINITY operation guide 02-20
Draining the water heater
Frost protection is tted as standard on all Rinnai INFINITY water heaters. Frost protection
operates automatically, as required, as long as the appliance is connected to the 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, which is not covered by warranty.
We strongly recommend having your water
heater drained by a plumber or gastter, but
understand that remote locations and cost may
prohibit this.
About these instructions
These instructions are intended as a guide
only. Rinnai does 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 not followed and insu󰀩cient
water was drained from the unit.
Procedure
You will need:
- A bucket if water cannot be drained into a
garden or drain
- Approximately 15 minutes to complete the
procedure
Wait until the water cools before draining
as hot water will drain from the unit if
there has been recent hot water use.
1. Turn o󰀨 any water controllers in the building
and then turn o󰀨 the water, gas, and power
to the unit.
2. To ush the water heater open all hot water
taps in the building.
3. If required, place the bucket under the unit
and unscrew the water lter and hot water
drain plug.
4. Drain the water heater—the unit and
surrounding pipes can hold up to one litre of
water.
Relling the Rinnai INFINITY
1. Check the gas and power are turned o󰀨.
Turn o󰀨 any open hot water taps.
2. Screw in the water heater drain plugs and
the water lter in the cold water inlet.
3. Turn on the cold water at the water heater.
4. Turn on the hot tap to purge air from the
pipe work and unit, then turn o󰀨 the hot tap.
5. Turn on the gas and power at the Rinnai
INFINITY and turn on any digital controllers
(if tted).
When the water heater or external pipes
have frozen
DO NOT operate the Rinnai INFINITY if the
water heater or the external pipes have frozen.
Close the gas and water valves, and turn o󰀨
the power. Wait until the water thaws, check
this by opening the water supply valve.
Check the Rinnai INFINITY and pipes for leaks.
WARNING
Filter
Drain
GasColdHot
Turn water off
Turn gas off
Drain water
Gas valve

Rinnai INFINITY operation guide 02-20 | 11
Please note: The hot water drain plug and water lter positions will vary depending on the model.
The images below are to highlight what they look like.
Hot water
drain plug
Water lter
Hot water
drain plug
Water lter

12 | Rinnai INFINITY operation guide 02-20
Limited Warranty
Rinnai INFINITY Continuous Flow Water Heaters
Rinnai warranty summary table
This warranty is applicable from all Rinnai INFINITY continuous ow water heaters manufactured
from 2019 onwards. All terms of the warranty, subject to the conditions below, are e󰀨ective from the
date of rst installation. The attending service person reserves the right to verify this by requesting
a copy of the gas certicate of compliance prior to commencement of any warranty work. Proof of
purchase and installation date will be required at the time of any warranty claim. This warranty is
only valid within the country of purchase.
HEAT EXCHANGER ALL OTHER PARTS
Rinnai INFINITY Application Parts Labour Parts Labour
A-Series models Residential WITHOUT
controllers
10 years pro rata13 years 3 years 3 years
Residential WITH
controllers
12 years pro rata13 years 5 years 3 years
Commercial 1500 hours or 1 year21500 hours or 1
year2
1500 hours or 1
year2
1500 hours or 1
year2
HD, EF and
N-Series models
Residential 12 years pro rata13 years 5 years 3 years
Commercial 5000 hours or 3 years pro
rata2
1500 hours or 1
year2
1500 hours or 1
year2
1500 hours or 1
year2
1 Under a pro rata warranty, if the heat exchanger fails before the end of the warranty, Rinnai will replace the heat
exchanger at a cost that depends on the age of the heat exchanger at the time of the fault. For further details refer to the
pro rata table on p.14.
2 Whichever comes rst
Residential application
A residential application is dened as an installation where a continuous ow unit is set to 55 °C3or
lower, delivering hot water to a single residential dwelling (not used for commercial purposes4).
All other installations are dened as commercial applications.
For constant use applications, such as circulating ring mains, the water heater, must be sized and
installed according to written guidelines from Rinnai.
General warranty terms
Rinnai reserves the right to make modications and change specications and its parts without
notice.
For the purposes of the Consumer Guarantees Act 1993, Rinnai only guarantees the availability of
repair facilities and spare parts for the express warranty period recorded in the table above.
This warranty does not limit any consumer rights or guarantees that may apply under the
Consumer Guarantees Act 1993. If the product is being acquired for the purposes of a business,
the provisions of the Consumer Guarantees Act 1993 do not apply and no other warranties (either
express or implied by law) apart from those stated in the warranty will apply.
3 A solar installation using a Rinnai INFINITY continuous ow unit (excluding A-Series models) in a single
residential dwelling is considered a residential application.
4 Examples of a commercial application in a residential dwelling; hair salon, catering kitchen, communal care
facility etc. An accommodation business such as a motel, where a continuous ow unit serves the equivalent of
a single family dwelling, is deemed to be a residential application.

Rinnai INFINITY operation guide 02-20 | 13
Warranty terms and conditions
1. All terms of the warranty are e󰀨ective from the date of rst installation. The attending service
person reserves the right to verify this by requesting a copy of the gas certicate of compliance
prior to commencement of any warranty work. The installer must issue a certicate of
compliance by law in New Zealand. Warranty claims may be invalid if not accompanied by
details of the installing or supervising gastter’s registration number and the gas certication
number.
2. All Rinnai appliances must be installed, commissioned, serviced, repaired and removed in
accordance with the manufacturer’s installation instructions, local regulations, and building
codes by persons authorised by local regulations to do so.
3. All appliances must be operated and maintained in accordance with the manufacturer’s
operating instructions.
4. Servicing of the product is to be carried out by a Rinnai authorised service centre.
5. The warranty applies only to the components supplied by Rinnai. It does not apply to
components supplied by others, such as electrical switches, electrical cables, fuses, isolating
valves, pipework, and where applicable ue systems, but it is not limited to these.
6. Where the appliance has not been sited in accordance with the installation instructions or
installed such that normal access is di󰀩cult, a service charge will apply. If at the discretion
of the attending service person the installation is deemed illegal or access is dangerous,
service will be refused. Any work required to gain reasonable access to the appliance will be
chargeable by the attending service person (for example, removal of cupboards, doors, walls,
or the use of special equipment to move components, but not limited to these).
7. Where the failed component is replaced under warranty, the balance of the original warranty
will remain e󰀨ective.
8. Rinnai reserves the right to transfer functional components from defective appliances if they
are suitable.
9. Rinnai reserves the right to have installed product returned to the factory for inspection.
10. Where the water heater is installed outside the metropolitan area or further than 40 km from a
Rinnai authorised service centre, travel costs shall be the owner’s responsibility.
Warranty exclusions
The following exclusions may cause the warranty to become void and will result in a service charge
and costs of parts (if required).
1. Accidental damage and acts of God.
2. Failure due to abuse or misuse, improper maintenance or improper storage.
3. Failure due to incorrect or unauthorised installations.
4. Failure or damage caused by alterations, service or repair work carried out by persons other
than Rinnai service persons or service centres.
5. Where the water heater has failed directly or indirectly as a result of poor water quality outside
the limits specied.
6. Where it is found that there is no fault with the appliance and the issue is related to the
installation or is due to failure of electric or gas supplied.
7. Subject to any statutory provisions to the contrary, Rinnai does not accept
a. liability for consequential damage or incidental expenses resulting from any breach of the
warranty.
b. claims for damage to building or any other consequential loss either directly or indirectly due
to leaks from the appliance or any other faults.

14 | Rinnai INFINITY operation guide 02-20
Pro rata heat exchanger warranty table
Under a pro rata warranty, if the heat exchanger fails before the end of the warranty, Rinnai will
replace the heat exchanger at a cost that depends on the installation application and the age of the
heat exchanger at the time of the fault.
A-SERIES HD, EF and N-SERIES
Year Residential WITHOUT
controllers
Residential WITH
controllers
Residential Commercial
1 100% 100% 100% 33.3%
2 100% 100% 100% 33.3%
3100% 100% 100% 33.3%
4 70% 90% 90% -
5 60% 80% 80% -
6 50% 70% 70% -
7 40% 60% 60% -
8 30% 50% 50% -
920% 40% 40% -
10 10% 30% 30% -
11 -20% 20% -
12 - 10% 10% -
The percentages above relate to the heat exchanger component only. It does not include labour.
Water quality
Water quality outside the limits (as set down below) will void this warranty.
Water quality and impurity limits
TDS (Total
Dissolved
Solids)
Total
hardness
CaCO3
Alkalinity
(as CaCO3)
Dissolved
(free) CO2
pH Chlorides Magnesium Sodium Iron Langelier
Index
Up to 600
mg/L or ppm
Up to 200
mg/L or ppm
Up to 200
mg/L or ppm
Up to 25
mg/L or ppm 6.5-8.5 Up to 300 mg/L or ppm
Up to 10 mg/L
or ppm
Up to 150
mg/L or ppm
Up to 1 mg/L
or ppm
Between
-1.0-0.8
Most metropolitan water supplies fall within these limits. If sludge or foreign matter is present in the
water supply, a suitable lter should be incorporated in the water supply.
Some examples of water quality issues where water may need to be treated:
• Hard water (areas including Whanganui)
• Aggressive water (areas including Christchurch)
• Both hard and aggressive water (some bore water)

Rinnai INFINITY operation guide 02-20 | 15
Purchase details
Please keep these details in a safe place for future reference.
ATTACH YOUR PROOF OF
PURCHASE HERE:
Retailer:
Retailer address:
Date of purchase:
Product details:
Record your purchase details below
Installer details
Company name:
Installer name:
Address:
Phone: Mobile:
Certicate of compliance number for installation:
Signed: Date:
Register your Rinnai INFINITY online at www.rinnai.co.nz/register/ for service reminders, product
updates and special o󰀨ers—you can unsubscribe at any time.

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Rinnai.co.nz Operation guide