Rinnai Zen I24 Operating manual

Gas-fired, condensing, modulating wall-hung boilers,
with adjustable power, sealed chamber, forced flow
with WiFi room thermostat
User and installation manual
REB-KBI2424FF - Zen I24 - Condensing ZI24
REB-KBI3535FF - Zen I34 - Condensing ZI34
PUSH
AUTO ON

2
0051
The Rinnai gas-fired combi-boilers are CE certified under
Regulation 2016/426/EU and Directive 2014/53/EU.
Zen I24 - ZI24 - REB-KBI2424FF
Zen I34 - ZI34 - REBKBI3535FF

3
IMPORTANT SAFETY INFORMATION
Meaning of the symbols used in the manual for important information concerning your safety:
IMPORTANT
Indicates a situation of potential serious danger, to respect and follow carefully.
ATTENTION
Indicates a potentially hazardous situation which, if not avoided, may lead to injury or property damage.
WARNING
Indicates important information.
NOTE
Information on the correct use, installation and operation of the product.
Indicates a potential condition of serious danger which must be complied.
Indicates a condition which should be avoided.
Indicates a ground connection for the prevention of an electric shock.
Warns of a risk of fire. Keep the area clean and free from flammable materials.
Warns of a risk of injury or property damage when contacting.
Rinnai boilers from the Zen range have been designed for wall installations only. They are built for domestic or similar
uses, for the production of domestic hot water and the heating of water at a temperature lower than that of boiling
at atmospheric pressure. They must be electrically powered, connected to a gas, heating and a domestic hot water
distribution system suited to their performance and power.
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 flue outlet
• Insert objects into the flue outlet
• Spray water directly into the flue outlet
• Spray aerosols in the vicinity of this appliance while it is operating
• Use or store flammable 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 flue outlet
Only a professional licensed company is authorized to install Rinnai gas appliances. The installation must follow
the requirements the Manufacturer’s installation instructions, Current AS/NZS 3000, AS/NZS 3500, AS/NZS 5601.1 &
G12/AS1 and all other relevant local codes & standards.
The appliance must be installed by qualified personnel only.
It is possible to install Zen boilers in outdoor areas, always open-air and well ventilated, or in
IMPORTANT
partially protected areas (not exposed to direct rain).
It is always mandatory to install an approved exhaust system.
Use the appliance exclusively for the use for which it was designed.

4
Do not make any changes to the appliance: do not attempt to repair, replace components, open sealed parts or
disassemble the appliance.Any tampering can lead to risks to health, damage to property, compromise the safety and
proper functioning of the product: for any type of repair, modification of settings or maintenance of the product and its
accessories, we recommend contacting the Rinnai technical service center.
Use only original Rinnai parts.
If you notice unusual noises, smells or vibrations, stop the appliance
immediately and contact CHNZ or your local installation company.
If you smell gas:
- close the main gas tap;
- open doors and windows to ventilate the room;
- contact your technician and wait outside the house.
In the event of an earthquake, fire, gas leaks, noises, stop the gas
andelectricity supply and open doors and windows.
Water temperature over 50°C can cause severe burns instantly or even death from
scalding. Hot water at 60°C can severely burn a child in less thana second. At 50°C it
takes five minutes. Always test the temperature of the water before any use.To prevent
these risks, Rinnai recommends to considersetting your hot water production at a
maximum temperature of 50°C. in all cases CHNZ recommends a tempering valve to be
installed.
Do not store flammable objects near the appliance: it could cause a productfailure or
fire. Do not spray aerosols in the vicinity of this appliance while itis in operation.
Do not insert objects into the flue outlet. Do not spray water directly into theflue outlet.
Keep, trees, shrubs, etc. well clear of the flue outlet. On colder days steam may
discharged from the flue outlet. This condition is normal forhigh efficiency appliances and
does not indicate a fault.
Do not touch the unit cover or the flue outlet.
Before connecting the mains cable, check that the power supply is suitable:make sure
that the electrical system is up to standard and has a good earthconnection; otherwise,
the appliance may be damaged or malfunctioning.
It is not recommended to extend the supplied electrical cable (eg through theuse of
extension cords or multiple sockets). In case of damage, replace theelectric cable with
an original one. Replacement may only be performed by Rinnai authorized technical
personnel.
After installation (or long periods of inactivity) it is advisable to let the hot water run before
the use.
It is recommended the installation of a system to collect and drain water under the
appliance in the case of waterleakage to prevent material and property damages.
Frost protection: Make sure that the power cord of the appliance isplugged-in,
and the electrical power is always available.
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 flow may need
to be stopped and restarted (and a controller, if fitted, switched on) in order for water
heating to continue.
The frost protection system activates only when the appliance is electricallypowered. All
pipes must be wrapped with insulating materials to prevent heat loss. The thickness of
insulation should be between 25mm and 50mm according to outdoor temperatures.
If extremely freezing conditions are expected, turn off water and gas, and
drain all water from the appliance. If power and the automatic frost protection are connected,
freezing will be prevented. (Anti-frost protection is fitted as standard equipment on all hot
water units). If water pipes are frozen, there would not be water flow in the system. Use a
heat source (e.g. hair dryer) to unfreeze the frozen components and pipes.
Before using the appliance after defrosting contact the CHNZ service to verify possible
damages.

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Rinnai, constantly striving to improve the products, reserves the right to modify the details given in this documentation
at any time and without notice.
From the time this manual is printed and attached to the product, to the time the product is purchased and installed,
the instructions and warnings may have changed: for your interest and your protection we recommend that You follow
the instructions and warnings reported on the most recent version of the manual, please visit Central Heating New
Zealand’s website to obtain this information
Rinnai disclaims any liability due to printing or transcription errors and reserves the right to update and change any
technical and commercial lists without prior notice.
Dear Customer, our compliments for having chosen a Rinnai top-quality product, able to assure well-being and safety
for a long period of time. As a Rinnai Customer you can also count on a qualified after-sales service to guarantee a
constant efficiency of your appliance.
The following pages are very important and contain useful instructions and suggestions on the correct use of Your
appliance.
GENERAL ADVICE
Rinnai products are provided with a packaging suitable for transport. The product must be stored in dry environments
and protected from bad weather.
This manual is part of the product and must be left to the new user in the case of property change of the appliance.
The manual must be kept in a safe place and carefully consulted as all warnings provide important safety instruction
for the installation, the use and the maintenance.
This manual contains technical information on how to install the product: for any issue related to the installation, comply
with the national and local laws in force and technical standards. According to legislation in force, the systems must be
designed by qualified technicians. Installation and maintenance must be performed in compliance with the regulation
in force, according to the manufacturer’s instructions and by qualified personnel.
An improper installation or assembly of the appliance (components, accessories, kits, etc.) can cause unexpected
problems to people, animals and property.
The product must be destined to the use for which it is designed for.Any other use will be considered as improper and
therefore potentially dangerous.
In case of any errors in the installation, the use or the maintenance due to non compliance with local regulation,
Standards or manufacturer’s instructions, the manufacturer is excluded from any contractual and extracontractual
liability for any damages and the appliance warranty is invalidated.
The user may not install or adjust the appliance in any way that requires the removal of the front cover of the unit: to
remove the front cover of the unit you must be certified competent to do so.
IMPORTANT
According to local laws in force, heating and hot water systems are subject to regular maintenance and regular
checking of the heating performance. To comply with these obligations we invite you to contact Central Heating New
Zealand.
Information on disposal of the product: the symbol shown here indicates that, according to the
laws and local regulations, the product must not be disposed of with household waste. At the end of
its life,theappliance mustbedeliveredtoacollection pointidentifiedbylocalauthorities.Theseparate
collection and recycling of the product at the time of disposal will help conserve natural resources and
ensure that it is recycled in order to protect health and the environment.
For further information on regulations related to the installation of the water heater or to find out your
closest authorized Rinnai service company you can contact:
CENTRAL HEATING NEW ZEALAND 03 357 1233

6
Dear Customer,
WARRANTY
Our compliments for having chosen a Rinnai product.
The standard Rinnai warranty does not affect the terms of the legal warranty on customer’s good and relates to
Rinnai products purchased. This product is warranted via Central Heating New Zealand (CHNZ) for a period of 5
years. Please refer to our terms & conditions for further details including criteria require to meet our warranty and
relevant parts covered.
WHAT IS COVERED?
The warranty covers any defects in materials or workmanship when the product is installed and operated according
to installation instructions, subject to the terms within this limited warranty document. This warranty applies only to
products that are installed by a registered gas engineer. Improper installation may void the warranty. This warranty
extendstotheoriginalpurchaserandsubsequentowners,butonlywhiletheproductremainsatthesiteof theoriginal
installation. The warranty only extends through the first installation of the product and terminates if the product is
moved or reinstalled at a new location.
WHAT WILL CHNZ DO?
CHNZ will repair or replace the product or any part or component that is defective in materials or workmanship,
except as set forth below:
- all repairs must be performed using genuine Rinnai parts.
- all repairs or replacements must be performed by a registered gas engineer.
Replacement of the entire product or replacement of any parts may only be authorised by Rinnai.
CHNZ does not authorise any person or company to assume for it any obligation or liability in connection with the
replacement of a product or heat exchanger. If CHNZ determines that repair of a product is not possible, CHNZ will
replace the product with a comparable product, at CHNZ’s discretion. If a component or product returned to CHNZ
isfound to be free of defects in material or workmanship, or damaged by improper installation the warranty claim
may be denied.
HOW DO I GET SERVICE?
The system must be serviced annually to ensure warranty applies to the appliance. Please contact the installation
company to undertake the service
Proofofdateof purchase is required toobtain warranty service. Youcan show proof ofpurchase witha dated invoice
or by completing and returning the enclosed warranty registration card.
Receipt of warranty registration by Rinnai will constitute proof-of-purchase for this product. However, warranty
registration is not necessary in order to validate this warranty.
WHAT IS NOT COVERED?
This warranty does not cover any failures or operating difficulties due to accident, abuse, misuse, alteration,
misapplication, acts of God, improper installation, improper maintenance or service, inadequate water quality, scale
buildup, freeze damage or for any other causes other than defects in materials or workmanship. This warranty does
not apply to any product whose serial number or manufacture date has been defaced.
CHNZ is not liable for any special, incidental, indirect or consequential damages that may arise, including damage
toperson or property, loss of use, failure to install drain pan under unit, or any inconvenience. This warranty does
not effect your statutory rights as defined by NZ laws.

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CONTENTS
IMPORTANT SAFETY INFORMATION.......................................................................................................................3
GENERAL ADVICE ..........................................................................................................................................5
IMPORTANT ....................................................................................................................................................5
WARRANTY................................................................................................................................................................6
CONTENTS.................................................................................................................................................................7
1.1FEATURESAND BENEFITS..................................................................................................................................9
THE NOISE DURING OPERATION IS EXTREMELY LOW.............................................................................9
1.2MAIN COMPONENTS..........................................................................................................................................10
1.3OPERATION ........................................................................................................................................................12
1.4TROUBLESHOOTING.........................................................................................................................................23
1.5MAINTENANCE...................................................................................................................................................35
1.6‘RINNAI BOILER NZ’APPLICATION...................................................................................................................36
24-hour timer setting ...................................................................................................................................................51
Weekly timer setting ...................................................................................................................................................52
Outing / Returning notification ....................................................................................................................................53
Wake-up mode ............................................................................................................................................................54
User notification .........................................................................................................................................................55
Status change alarm, Precaution alarm, Error alarm ...................................................................................................56
Change user information ............................................................................................................................................58
App user guide Gas consumption ............................................................................................................................58
Version......................................................................................................................................................................59
Log out .......................................................................................................................................................................59

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The following section shows the instructions for a correct use of the product.
It is intended for the use of qualified technical personnel and of the final user of the product.
1. USER’S INSTRUCTIONS

9
1.1 FEATURES AND BENEFITS
Congratulations on purchasing the Rinnai Zen CONDENSING gas boiler, with ADJUSTABLE POWER (RANGE
RATED), sealed chamber and forced flow, with ELECTRONIC CONTROL OF TEMPERATURE and WiFi ROOM
THERMOSTAT.
Zen is a PREMIXED boiler with “CONTINUOUS MODULATION ON GAS AND AIR”. It is equipped with a LOW NOx
EMISSION metal fiber burner: the emission values make it one of the most environmentally friendly products on the
market.
The Rinnai Zen boiler is a FORCED FLOW gas appliance, with HIGH ENERGY EFFICIENCY: these features make it
extremely compact, guaranteeing considerable space savings and drastically reducing gas consumption.
The Zen ‘I’ range is supplied with a WiFi ROOMTHERMOSTAT as a standard, showing the operating temperatures
(heating and DHW), error codes and the advanced boiler regulation functions. By activating the WiFi FUNCTION
and installing the application ‘Rinnai Boiler NZ ’ it is possible to control and manage the main functions directly
through your SMARTPHONE. The application allows the installation up to a maximum of ten users per command and
the management of three different boilers: the whole family can enjoy maximum comfort.
THE NOISE DURING OPERATION IS EXTREMELY LOW.
The Zen series is equipped with a SIPHON CONDENSATE TRAP FILLED WITH A NEUTRALIZER: you can
discharge condensate waste without the fear of damaging the drain or the disposal plant.
It is equipped with a SAFETY SENSOR FOR EARTHQUAKES: in case of medium or high seismic events, the boiler
automatically isolates itself from the gas supply.
Hot water is exclusively produced in an INSTANTANEOUS way: it is not stored in tanks with limited capacity, always
source of constant dispersions and high energy consumption.
TheapplianceisequippedwithaspecialsafetyandcomfortfunctionthatCONTROLSTHEMAXIMUMTEMPERATURE
of the hot water supplied. The temperature can be adjusted to a precise value: this function is particularly useful when
the appliance is installed at the service of children, patients or elderly people. If necessary, the temperature can be
modified at will from the control panel (remote control), supplied as standard, to better serve the user. The temperature
of the hot water supplied is constantly monitored by several internal sensors. A tempering valve must be installed by
your registered gas installer at the hot water outlet.
ERROR CODES are displayed on the remote control to facilitate technical assistance: they appear as flashing numeric
codes on the display.
TheZenboiler rangehasan‘IP 5’ PROTECTIONRATING andcanbefreelyinstalledinEXTERNALENVIRONMENTS,
directly exposed to weather/environment without additional protection (the correct installation of the flue gas fitting is
necessary).
ANTIFROST PROTECTION is included as standard on each model: the appliance is protected down to -20°.
PUSH
AUTO ON
MENU TIMER
ENERGY
SAVE OFF

10
1.2 MAIN COMPONENTS

11
Wi-Fi REMOTE CONTROLLER
Anti-freezing function operation
Burner ON
Space heating mode
Wi-Fi connection
BOILER DISPLAY
Burner lamp
Heating mode (CH) / Temperature control
Heating mode (CH) lamp
Hot water mode (DHW) / Temperature control
Hot water mode (DHW) lamp
Heating (CH) / Hot water (DHW) temperature
Set
AUTO
SAVE
ON

12
1.3 OPERATION
Before turning on the boiler, it is advisable to know how it properly works.
The operation of the boiler and the main functions that can be activated are described below.
Once the boiler has been installed & commissioned by a registered gas fitter with the controller connected to the boiler
we can commence configuration of your heating system. Please note the Rinnai Zen boiler can be operated from the
remote controller or via the panel on the boiler.
This basic configuration allows to:
•activate/deactivate the heating mode and adjust the flow temperature of the heating system;
•activate/deactivate the hot water supply, adjusting the temperature of the hot water;
•check for malfunctions and error codes.
A second operation mode is by connecting the Rinnai WiFi thermostat, which is supplied as a standard with the
appliance. The main features available are:
•select the heating mode (room temperature or flow temperature mode);
•activate/deactivate the heating mode and adjust the flow temperature of the heating system;
•activate/deactivate the hot water supply, adjusting the temperature of the hot water;
•special functions use (fast heating; hot water pre-heat; Auto mode, Save, Reservation, etc);
•check for malfunctions and error codes;
•monitor the energy consumption;
•adjustment of boiler’s operation parameters;
•operation of the boiler through the ‘Rinnai Boiler NZ ’app and your own smartphone.
Athird operation mode is made by connecting the boiler a third party thermostat in conjunction to the Rinnai WiFi one:
in this configuration the Rinnai remote is no more controlling the room temperature, but it can be still used to adjust the
hot water temperature. The third party thermostat is in control of the room heating temperature.
By activating the WiFi mode, the boiler can be operated and programmed by Your own Smartphone through the ‘Rinnai
Boiler NZ ’application (up to ten users can register and control the boiler). The main functions are all available and
always handy; more advanced and more specific ones are available, to manage and program the boiler. The
application is equipped with a simple introductory guide that explains its operation quickly and easy. The specific user
manual for the application is available on the Internet site:www.centralheating.co.nz
Boiler display
Boiler display & WiFi
room-thermostat
Boiler display,
WiFi Rinnai control &
third party room
thermostat
Boiler display,
WiFi room-thermostat
& Smartphone
Before using the boiler, make sure that the heating circuit is always filled correctly: when the
system is still cold, the pressure gauge on the front panel must indicate a value in the green
sector (1.0 ÷ 1.5bar). If necessary, restore the correct value by operating the fill/load tap at the
base of the boiler.
When the boiler is electrically connected, an automatic venting program is activated. It can
last from 60 to 120 minutes depending on the system. It is necessary to wait until the end of
the cycle to allow the expulsion of all the air that was formed in the installation phase (or in the
period of non-use). Press a button on the remote control causes the early stop of the venting
cycle and can cause problems. A particular noise can be a sign of the presence of air bubbles
still circulating in the pipes: unplug the boiler and re-plug it to repeat the venting cycle.
AUTO MENU
TIMER ON
MENU TIMER
ENERGY
MENU TIMER
ENERGY

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ON
1.4.1 INITIAL SETTINGS
Turn the boiler On/Off
When first operated, by pressing the button
(1) on the WiFi thermostat:
the display lights up, the ‘clock’ flashes and the boiler can now operate.
If the button is pressed during the boiler’s operation, the display turns off
and the boiler stops operating.
Time setting
It is possible to adjust the ‘time’ only when main functions (central heating and hot water heating ) are not
activated: check that their icons, on the sides of the adjusting dial, are not illuminated. If they are illuminated, it is
necessary to deactivate the function by pressing the icon on the panel.
PUSH PUSH
To set the time on the WiFi remote follow the procedure:
•Press and keep pressed for three seconds the adjusting dial (1):
a ‘beep’ is heard and the ‘hour’ flashes;
•Rotate the knob to set the desired hour (2);
•To confirm the hour, press the knob once (1):
a ‘beep’ is heard and the ‘minute’ flashes;
•Rotate the knob to set the desired minute (2);
•Press the knob once to confirm the time set (1):
a ‘beep’ is heard and the ‘time’ is set.
‘Child-lock’ function
To prevent tampering and to increase the security, the WiFi thermostat is equipped with a ‘key lock’ function.
To activate the ‘Child-lock’ function follow the procedure:
•Ensure the thermostat is switched On (press the button
it On); to switch
•Press and keep pressed the button (1) for three seconds:
a voice prompt is heard and the display shows the icon ;
ON
ON
ON
AUTO
SAVE
MENU
TIMER
1
AUTO
SAVE
MENU
TIMER
1
Todeactivate the lock function it is possible to follow the locking procedure or to keep the heating key
pressed for three seconds.
NOTE
When the key lock function is active:
•the icon shown on the display flashes when the keys of the thermostat are pressed;
•by pressing the button the thermostat will not switch Off;
ON
OFF
•in the case of malfunction, to reset the error code flashing on the display, it is necessary to
unlock the thermostat first;
•the lock function is active on the WiFi remote only: the boiler display will not be locked.

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1.4.2 HEATING FUNCTION (CH)
The heating function will also be mentioned as CH.
Using the Rinnai WiFi room thermostat, it is possible to choose between one of the two heating modes: by pressing
the button of fig.1, on the right side of the WiFi thermostat, you select the desired heating mode and the relevant
symbol appears on the display. To change the heating mode, it is necessary that the heating function is deactivated
(the display must appear empty).
•’Space-heating’ mode:
the Rinnai remote control is equipped with a temperature sensor that
constantly monitors the temperature of the environment in which it is
installed.
The boiler mantain the room heated according to the temperature set on the
remote control: when the temperature detected in the room is higher/lower
than the set temperature, the boiler stops/activates accordingly. The preset
temperature is 22°C; it is possible to select temperatures ranging from 5°C
to 40°C.
The room thermostat should be installed in an optimum location in the dwelling,
typicallythehallway.
•’Flow-heating’ mode (default setting):
Room
temperature
sensor
Fig.1
Heating
mode
button
The Rinnai remote control allows you to adjust the flow temperature of the heating system. When the measured
temperature is higher/lower than the set temperature, the boiler stops/activates accordingly. The preset temperature
is 55°C; it is possible to select temperatures ranging from 35°C to 80°C. the boiler should be left at the temperatures
set by the commissioning installer/engineer.
Heating temperature setting
PUSH PUSH
To set the heating temperature follow the procedure:
•Press once the heating mode button (1):
a ‘beep’ is heard and the button lights up; on the display the
temperature value previously selected is flashing;
the boiler fires and the display shows the icon as soon as the
burner is on;
when the set temperature is achieved, the boiler switches the burner
off and the icon of the flame is no more displayed.
•Rotate the adjusting dial (2) to modify the desired set temperature.
To deactivate the heating function of the boiler follow the procedure:
•Press once the heating mode button (1):
a ‘beep’ is heard and the button turns off; the display does not show anymore the heating temperature
value.
Toverifytherealwaterdeliverytemperatureof theheatingsystem(thismaydifferfromthesettemperature)
it is necessary to keep the thermostat knob pressed for three seconds: the display shows the real value for
NOTE ten seconds and then returns to normal display.
During normal operation, the boiler can operate at a pre-set regime which is particularly favorable
for the reduction of polluting emissions and fuel consumption; during this operation the boiler
operates at its maximum energy efficiency and the green “Eco” symbol shown on the side appears
on the display.

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1.4.3 DOMESTIC HOT WATER FUNCTION (DHW)
The hot water function will also be mentioned as DHW.
The production of hot water takes place in a direct and instantaneous way: you will never be without hot water as long
as electric power, water and gas are guaranteed.
The appliance is equipped with a sensor that keeps the temperature of the supplied water under control: this is source
of high comfort and extreme safety for every type of user.
It is always possible to activate the heating mode, during the hot water supply: this function will not be activated until
the production of domestic hot water is completed.
It is possible to keep both CH and DHW functions activated but the boiler always gives priority to the use of DHW
mode with respect to CH.
Hot water temperature setting
PUSH PUSH
To activate and set the hot water temperature follow the procedure:
•Press once the hot water mode button (1):
a ‘beep’ is heard and the icon lights up; on the display the
previously selected temperature value is flashing;
by opening a tap, the boiler fires and the display shows the icon
as soon as the burner is on; the color of the hot water function
button’s led turns to orange.
•Rotate the adjusting dial (2) to modify the desired temperature.
To deactivate the DHW function of the boiler follow the procedure:
•Press once the hot water function button (1):
a ‘beep’ is heard and the icon stops; the display does not show anymore the hot water temperature value.
The selectable temperatures may vary between 35°C and 60°C.
For safety reasons, all the taps must be closed before a higher value than 55°C is set. Hot water
ATTENTION
must not be used during the operation.
In order to reduce gas consumption and to extend the water heater’s life, Rinnai suggests to set
the device’s temperature on the minimum which is more suitable for the intended use. Use hot
water on the pre-set temperature, so there is no need to mix it with cold water.

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1.4.4 HOT WATER RAPID HEATING AND PRE-HEATING FUNCTION
Rapid heating
The rapid heating function can be used to quickly restore the suitable temperature in a cold environment: the boiler
will operate at maximum power for twenty-five minutes, in order to create the right conditions for a sudden rise in
temperatures in the installation.
At the end of this time interval, the boiler will go automatically back to the pre-set functioning.
To activate the rapid heating function, perform the following steps:
•Activate the heating mode, by pressing the button ;
•Press again & hold for three seconds:
the display will show a temperature of 40°C if the boiler is set on
the ’room temperature’ mode; or 80°C if the boiler is set on the ‘flow
temperature’ mode.
To deactivate the rapid heating function:
•Turn the dial.
Ambient temperature mode
Flow temperature mode
Hot water pre-heating function
The pre-heating function consents to prepare the boiler for the provision of domestic hot water and to benefit of a
superior comfort: pre-heat function allows a faster delivery of hot water at the desired temperature shortening the time
needed for its production.
When the function is activated, the hot water preparing circuit is immediately raised to the right temperature and
mantained hot for thirty minutes (or until first use).
At the end of this time period (or after having used hot water), the boiler stops this function automatically in order to
reduce wasted energy and minimize the consumption, then returns to normal operation.
To activate the hot water pre-heating mode, follow the procedure:
•Activate the DHW mode, by pressing the button ;
•Press again for three seconds:
the symbol (in motion) will appear on the display, replacing the
hot water temperature set before.
To deactivate the hot water pre-heating mode:
•Press & hold the button for three seconds.
1.4.5 WIFI FUNCTIONS
It is possible to control the boiler through smartphone, by installing the freeApp ‘Rinnai Boiler NZ ’and registering the
suppliedWiFi thermostat: the information about the proper installation procedure are provided in the specific paragraph
in the end of this handbook .
When the WiFi is on, this symbol will appear on the display
To activate or deactivate the WiFi function:
•Press the button (1) on the remote control’s side.
WiFi function key

17
SAVE
1.4.6 AUTO MODE (AUTO)
Auto mode will be also indicated by the abbreviation AUTO.
The AUTO mode enables the boiler to adapt the regular flow temperature of the heating circuit to the values of the
outdoor ambient temperature, in complete autonomy. The auto mode only works on the heating mode and not on the
production of hot domestic water.
The device periodically monitors the external temperature in order to adjust the internal flow temperature by means of
a sensor: in the cold seasons, the boiler will be able to adjust the heating circuit’s water’s temperature proportionally to
the outdoor temperature reduction; the other way round, the boiler will lower the indoor temperature to adjust it to the
rising outdoor temperature in the warmer seasons.
The device works autonomously, adjusting its own functioning to the actual temperatures of the current season. This
provides a greater domestic comfort while reducing polluting emissions and fuel consumption.
To activate the AUTO mode, perform the following steps.:
•Press the button on the room-thermostat once (1):
a light blue symbol will appear on the display and the
function is activated;
if the heating mode is active, the display will appear as shown in the
figure on the right;
To leave the AUTO mode:
•Press once the button , or the button .
Room temperature mode
Flow temperature mode
1.4.7 ENERGY-SAVING MODE (SAVE)
Energy-save mode will also be mentioned as SAVE.
Energy-saving mode exclusively operates on the heating mode and not on
the domestic hot water production. When the SAVE mode is on, the boiler
modifies the on/off operation of the burner. IN SAVE mode, the upper
temperature settings that the controller can be set to are limited (in order to
reduce energy consumption). So the maximum selectable room temperature
shall be 20°C and the maximum flow temperature shall be limited to 60°C.
To activate SAVE mode, perform the following steps:
•Press the button on the thermostat twice (1):
the light blue symbol will appear on the display and the
mode will be activated;
if the heating mode is active, the display will appear as shown in the
figure on the right;
To deactivate the SAVE mode:
Room temperature mode
Press the button once, or the button
SAVE
NOTE
When AUTO mode is on, the boiler will not consent you
to modify the heating temperature: this value is entirely
automatically managed. AUTO mode has to be disabled to
change the temperature.
SAVE
SAVE
AUTO
SAVE
MENU TIMER
AUTO
SAVE
MENU TIMER
Press the button
SAVE
more than once and scroll through the
AUTO and SAVE functions as shown in the scheme:
AUTO
OFF
NOTE
Flow temperature mode

18
TIMER
1.4.8 RESERVATION MODE (RESERVATION)
The functioning of the ‘reservation mode’ will also be mentioned as RESERVATION.
The Rinnai Wifi’s thermostat consents you to set time slots for the heating mode every day. It is possible to program
the favourite time slots during which the boiler must maintain a comfortable temperature and those during which it is
allowed to reduce the temperature (night time or whenever nobody is at home).
The specific time reservation works both in ‘room temperature’ mode and in ‘flow temperature’ mode and works
exclusively on the heating mode but not on the domestic hot water production.
To activate and program the RESERVATION mode, perform the following steps.:
•set the intended time on the thermostat (see par. 1.4.1)
•Press button (1);
PUSH
•Press button
the icon
once (2):
. flashes on the display, meaning that the specific time
The first time schedule of the RESERVATION mode has been activated;
•Press button several times to select the intended time slot:
The programs from number one to three are predefined and cannot
be modified, while the specific time programs number four and five can be personalized;
•to confirm the selection of the intended time in the program wait a few seconds: the icon of the intended
specifics time slots will stop blinking.
•The specific time reservation will be completed by defining the temperatures T1 (daytime) and T2 (reduced) in
the menu A (parameters 6 and 7) of the thermostat functions (see par. 1.4.9):
the temperature T1 is used by the boiler during the intended and selected specific times (highlighted in
orange in the time slot); but the temperature T2 is used during the unselected time slots.
Toexit RESERVATION mode during the operation:
•Press the button : the boiler will go back to normal operation.
By re-activating RESERVATION mode, the system will re-open the previously selected program.
Personalizing the reservation mode
Only the programs four and five can be personalized. The use of ‘RINNAI BOILER NZ’application allows to
select a more detailed time slots programming schedule.
To select the time slots, perform the following steps:
PUSH PUSH
•Press button until it is possible to select a program
. o . ;
•Turn the dial (1) and drag the orange flashing selector of the hour bar on the intended time;
•Press the dial (2) to confirm the selection of the intended time;
•Repeat the previous operations until you have completed the intended pattern;
•The reservation is completed when temperature T1 (daytime) e T2 (reduced) are defined in the menu A
(parameterss 6 and 7) of the thermostat functions (see par. 1.4.8):
the boiler uses temperature T1 in correspondence to the selected time slots (highlighted in orange in the time
schedule); the temperature T2 is used during the unselected time slots.
1
2
TIMER
TIMER
TIMER
1
ON
2

19
MENU
1.4.9 PARAMETERS MENU
Rinnai WiFi thermostat allows the user to benefit from a great variety of parameters related to the boiler functioning. It
provides important details on how to operator controller and assist with troubleshooting in the event of a fault.
Parameters are grouped by type and sub-divided in sub-menus:
Menu A ►B ►C ►D ►Exit
To enter and select the parameters menu, perform the following steps:
•press the button
(1);
•the following icons will appear on the WiFi thermostat:
- means that you have entered in the parameters menu;
- indicates the selected menu: ‘menu A’;
- indicates the visualized parameters: ‘parameter 01’;
- indicates the value of the visualized parameters: ‘02’.
•press the button several times to change menu:
the A menu and the B menu are accessible only if the heating
(CH) and hot water (DHW) functions are deactivated.
By turning the dial (2) it is possible to change the parameter (or its value): the icon will be lit up.
By pressing the dial (2) it is possible to confirm the selection of the parameter (or its value): the icon is not blinking.
To exit the parameters menu is necessary to press the button (1) more than once.
Parameters of A menu
The A menu groups all the parameters concerning the thermostat settings and the boiler programming:
Nr
par.
Parameter
Values
Parameter's description
Initial
value
1
Thermostat language
EN, IT, ES
EN: English; IT: Italian; ES: Spanish.
EN
2
Loudspeaker volume
0~5 (OFF, 1~5)
Modifies the volume of the vocal messages of the thermostat.
3
3
Keyboard sounds
ON/OFF
Activates or deactivates the sounds of the buttons.
ON
4
Antifreeze signal / errors
ON/OFF
Acoustic alarm notifications for anti-frost and boiler functioning errors.
ON
MENU
MENU
AUTO
SAVE
ON
MENU TIMER
1
3
Menu A
Boiler and thermostat settings
Menu B
Services and maintenance
Menu C
Faulty History Mode
Menu D
Information
For safety reasons, Rinnai suggests not to modify the parameter menus without having fully
understood the meaning of the parameters themselves and their possible consequences on the
boiler.
If in doubt, Please contact your local registered installer or CHNZ should you require assistance
with the instructions in this section
NOTE
After 20 seconds of inaction, the parameters menu will be
automatically closed and the display will go back to its
normal operating state.
Not to exit the parameters menu and to keep it forced active
(for five minutes), press
show up on the display.
: the symbol
(hold) will

20
Nr
par.
Parameter
Values
Description parameter
Initial
Value
5
Led brightness
1~3
Modifies the brightness of led CH e DHW.
2
6
Temperature T1
(daytime)
35~80°C
5~40°C
Programming of daytime temperature of thermostat.
75°C
21°C
7
Temperature T2
(reduced)
35~80°C
5~40°C
Programming of reduced temperature of thermostat.
55°C
16°C
8
Limit of maximum
discharge temperature
35~80°C
Limits the max. flow temperature that the boiler can reach, in
every kind of functioning/mode/function.
80°C
9
Climatic curve
1~5
Activated during AUTO mode, selects the climatic curve.
4
10
Climatic curve
translation
-10~10°C
Transfers the values of the preselected climatic curve.
0°C
11
Compensation temp.
thermostat
-10~10°C
Modifies the perceived temperature by the room thermostat.
0°C
12
Compensation temp.
outer sensor
-15~15°C
Modifies the external temperature detected by an outer
sensor.
0°C
13
Burner ignition delay
OFF, 1~50
It enables the boiler to delay the ignition of the burner to
a max. of 500 seconds to assist slow opening zone valves
or reduce short cycling issues
Value x10 = delay
OFF
14
Frequence
re-ignition CH
1~5
Modifies the 'OFF forced stationary' state of the burner,
between two consecutive ignitions.
Low value = longer waiting time
5
15
Positioning of the
climatic sensor
OU/In
Defines the environment in which the climatic sensor has been
installed: the sensor is pre-installed in the boiler (In), but it can
be extended outside (OU).
In
16
Booster of delayed
temperature CH
ON/OFF
In 'room temperature' mode, the flow temperature of the boiler
changes when the differences between the pre-set temperature
and the temperature detected by the thermostat changes.
with this parameter, the flow temperature is incremented with
respect to its normal value.
OFF
0
Reset parameters
menu A
- -
The A menu's parameters are brought back to the initial
settings.
- -
Climatic curves
The climatic curves (numbered from one to five), concerning parameter 9 from A menu are shown below:
85
80
75
70
65
60
55
50
45
40
35
30
-30 -25 -20 -15 -10 -5 0 5 10 15 20
External temperature (°C)
Flow temperature (°C)