CENTRAL HEATING Rinnai Zen Instruction Manual

Rinnai Zen
Installation &
Maintenance Manual
Gas-red, condensing, modulating wall-hung boilers with adjustable
power, sealed chamber, forced ow with Wi room thermostat

0800 357 1233 | [e-mail] | trade.centralheating.co.nz Page: 2 of 42
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 –REB-KBI3535FF

0800 357 1233 | [e-mail] | trade.centralheating.co.nz Page: 3 of 42
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
I
I
M
M
P
P
O
O
R
R
T
T
A
A
N
N
T
T
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
.

0800 357 1233 | [e-mail] | trade.centralheating.co.nz Page: 4 of 42
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.

0800 357 1233 | [e-mail] | trade.centralheating.co.nz Page: 5 of 42
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 ADVISE
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 systemsmust 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 of the laws in force,
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 be disposed of with household waste. At the end of its
life, the appliance must be delivered to a collection point identified by local authorities. The separate
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:

0800 357 1233 | [e-mail] | trade.centralheating.co.nz Page: 6 of 42
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
extends to the original purchaser and subsequent owners, but only while the product remains at the site of the original
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
Proof of date of purchase is required to obtain warranty service. You can show proof of purchase with a 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.

0800 357 1233 | [e-mail] | trade.centralheating.co.nz Page: 7 of 42
CONTENTS
IMPORTANT SAFETY INFORMATION.......................................................................................................... 3
GENERAL ADVISE ............................................................................................................................. 5
IMPORTANT ....................................................................................................................................... 5
WARRANTY ................................................................................................................................................... 6
CONTENTS .................................................................................................................................................... 7
2.1 INSTALLATION WARNINGS..................................................................................................................... 9
2.2 UNPACKING THE BOILER..................................................................................................................... 11
2.3 DIMENSIONS .......................................................................................................................................... 11
2.4 MAIN COMPONENTS............................................................................................................................. 12
2.5 GENERAL SCHEME AND OPERATION PRINCIPLES .........................................................................13
2.6 INSTALLATION ......................................................................................................................................14
Minimum Flue Clearances. .....................................................................................................................17
2.7 CIRCULATION PUMP ............................................................................................................................. 20
2.8 COMMISSIONING THE BOILER ............................................................................................................ 21
2.9 GAS CONVERSION AND PRESSURE ADJUSTMENT ........................................................................ 22
2.10 ANTIFROST PROTECTION................................................................................................................ 24
3.0 RINNAI BOILER NZ ............................................................................................................................... 24
3.2 PARAMETERS MENU ............................................................................................................................ 26
3.3 PCB ......................................................................................................................................................... 29
3.4 TECHNICAL DATA ..................................................................................................................................33
3.5 COMBUSTION PARAMETERS..............................................................................................................36
3.6 PRODUCT FICHE ..................................................................................................................................37
3.7 MAIN COMPONENTS DISASSEMBLY .................................................................................................. 38

0800 357 1233 | [e-mail] | trade.centralheating.co.nz Page: 8 of 42
8
The following section provides specific instructions for a correct installation of
the product.It is intended for the exclusive use of
qualified technical personnel.
2. INSTALLER’S INSTRUCTIONS

0800 357 1233 | [e-mail] | trade.centralheating.co.nz Page: 9 of 42
9
2.1 INSTALLATION WARNINGS
Rinnai Zen boilers have been designed only for wall-mounted installations. They are made for domestic (or similar)
use, for the production of domestic hot water and for water heating (at a lower temperature than the atmospheric
boiling point).
They have to be electrically powered, connected to an appropriate gas supply, a hydronic heating emitter system and/or to
a domestic hot water supply network, both of them in line with the boiler’s performances and power.
Only professional enterprises are authorised to install Rinnai’s gas boiler appliances and must be commissioned by a
registered gas installer.
2.1.1 LOCATION
The boiler can be installed outside without any particular protection against rain, snow etc. (a sheltered position is
suggested for the installation, in order to reduce heat losses). It is necessary to provide proper insulation for the
plumbing pipes to prevent frost; always ensure electrical power and sufficient quantity of gas; always make sure that
the exhaust system is properly installed and sealed. The allowed temperatures of use in external environment are:
-20°C to +40°C.
For indoor installations, the boiler must be flued to the outside. They may be installed in an enclosure if the
requirements of AS/NZS 5601.1 are satisfied. An enclosure is defined as a compartment, enclosed area or
partitioned off space primarily used for the installation of the appliance.
• DO NOT install in areas where contaminated air is present.
• Consider, before installation, where air has the ability to travel within a building.
• Where possible, install the heater in a sealed space so that it is free of contaminated indoor air.
The installation in fire hazard places (garages, box, etc.), on cooking appliances or in particularly humid areas is
forbidden; too close to flammable material, chemical products, corrosive substances (or similar materials) nearby the
boiler is installed is forbidden.
The air surrounding the appliance, the exhaust and inlet air system, is used for the flame’s combustion: air must be
devoid of each element that could cause the corrosion of the components (it means air must not contain corrosive
substances, for instance, aerosol, spray, detergents, chemical solvents, oiled-base paints, refrigerants, etc.). The
boiler and its exhaust and ventilation systems must not be installed in environments where corrosive, chemical and
combustible substances can be found. Damages and repair due to corrosive chemicals compounds are not covered
by warranty.
Installations in coastal areas require a more frequent maintenance: this is due to corrosive phenomenon of the air from
the sea.
The appliance must be fixed to a flat vertical support wall, with the gas and water connections facing downwards. The
wall that will support the boiler must be plain and able to hold the water heater (35-40kg), so it has to be built in solid
or perforated bricks. Both the brackets (upper and lower) must be fixed to the wall with appropriate screws.
The boiler must be easily accessible and maintainable: its position must ensure a risk-free accessibility for inspection,
service and emergency measures. Sufficient space to remove components and properly maintaining the product must
be ensured.
It is necessary to provide an electrical outlet with AC230V / 50Hz power supply with grounding nearby the appliance,
sufficiently far from the gas and water connections of the appliance and from the exhaust outlet. For outdoor installations
it is necessary to provide a protected and waterproof plug. The electrical cable of the appliance is 1.5m long.
The positioning of the exhaust terminal must comply with the provisions of the current legislation including AS/NZS
5601.1. the appliance must be used with an appropriate CHNZ flue system.
It is important a suitable drained catch pan is fitted where damage could be caused by discharge from the water
heater. Provision must be made for safe disposal of any leaking water to an external location.
The following section contains technical guidelines concerning the product’s installation. 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.

0800 357 1233 | [e-mail] | trade.centralheating.co.nz Page: 10 of 42
10
2.1.2 EXTERNAL CONDITIONS
AS/NZS 5601 states a minimum horizontal clearance of 500mm between a building structure and obstruction
facing the terminal. At 500 mm the obstruction needs to be the full height of the unit, as shown below, and not a
partial obstruction. A partial obstruction of less than 1 m could result in wind pushing the flue gases back into the
flue terminal.
There must be NO partial obstructions to the appliance front cover or any other part of the appliance
casing This will avoid the appliance from failing to operate under windy conditions .

0800 357 1233 | [e-mail] | trade.centralheating.co.nz Page: 11 of 42
11
265**
20
2.2 UNPACKING THE BOILER
Prior to use, verify that the boiler is set up for the correct type of gas and that the appliance is intact. If the appliance
is clearly damaged do not proceed with the installation: call your supplier or Rinnai immediately. Together with the
appliance, you will find the following parts and accessories in the packaging:
Instructions manual
and documentation
Screws’ kit for controller WiFi thermostat
(WF-
P100W)
2.3 DIMENSIONS
(Dimensions in mm) 225
46.5
126.7
72 78
100
83 71
440
* REB-KBI3535FF = 315
Heating flow - 20A (3/4”)
Hot water outlet - 15A (1/2”)
Gas - 15A (1/2”)
Cold water inlet - 15A (1/2”)
Heating return - 20A (3/4”)
PUSH
72
78
83
71
210
700
101
77
660
77
82

0800 357 1233 | [e-mail] | trade.centralheating.co.nz Page: 12 of 42
12
2.4 MAIN COMPONENTS

0800 357 1233 | [e-mail] | trade.centralheating.co.nz Page: 13 of 42
13
PCB
2.5 GENERAL SCHEME AND OPERATION PRINCIPLES
Heating circling mode (CH)
AIR
INTAKE
SMOKE COMBUSTION
OUTLET
Domestic hot water circling (DHW)
AIR
INTAKE
SMOKE COMBUSTION
OUTLET
Igniter
PCB
Manometer
CH
Entrance
DHW CH
Igniter
PCB
Manometer
CH
Entrance

0800 357 1233 | [e-mail] | trade.centralheating.co.nz Page: 14 of 42
14
2.6 INSTALLATION
2.6.1 HYDRAULIC COUPLINGS
The dimensioning and the layout of hydraulic pipes must be properly designed in order to ensure an adequate water
flow rate to the appliance.
Domestic hot water
The DHW connections are: 15A (R1/2”) male type.
Where the water supply pressure exceeds 10bar, an approved pressure regulator must be installed at the inlet of the
appliance or in the water supply to this appliance. To achieve the maximum flowrate, a water supply pressure of 1.5
bar is required. The unit will operate at lower pressures but the maximum flow rate may not be achieved. The minimum
pressure to ensure the nominal flowrate is equal to: 0.7Bar (Zen I24), 1.10Bar (Zen I29), 1.2Bar (Zen I34).
Connect the hot and cold water supply pipes. An approved interception ball valve and strainer MUST be installed on
the cold water inlet pipe. An approved interception ball valve and draining point should be installed on the hot water
outlet pipe. Do not connect the valves directly to the appliance, but interpose a flexible connection joint.
If the boiler is installed in a hard water area, a suitable water conditioning system must be installed to prevent limescale
damages to the heat exchanger: damages by scaling are not covered by the manufacturer’s warranty. Below are some
limit values of substances dissolved in water:
Description pH
Tot.
dissolved
solid
Total
hardness
Chlorides Magnesium Calcium Sodium Iron
Maximum
recommended
levels
6.5-9.0 600mg/l 150mg/l 300mg/l 10mg/l 20mg/l 150mg/l 1mg/l
The hydraulic pipes must be insulated to optimize energy efficiency and reduce heat loss.
Heating
The CH connections are: 20A (PT3/4”) male type.
The vent valve must be connected to an external drain, preferably a tundish to prevent damages.
When connecting the water supply pipes, it is recommended to have an interception ball valve and a filter on the return
pipe from the system, and an interception ball valve on the flow connection. Do not connect the valves directly to the
boiler, but interpose a flexible connection joint. It is recommended the installation of vent valves on the system.
Condensate drain pipe
During operation, the appliance can produce a significant amount of condensate as a product of the combustion of a
highly-efficient system. The condensate is mild acid and non-potable: to prevent damages and disposal problems, the
boiler is equipped with a sealed condensate trap siphon, already filled with an acid-neutralizer (the duration of use is
estimated to be eight/ten year long - it is necessary to check the PH regularly).
Connect a non-metallic pipe to the siphon’s base (PVC, PVC-U, ABS, PVC-C or PP): it drains and eliminates excess of
condensate. The connected pipe must have minimum slope of 2.5°. It is recommended to install the condensate drain
pipe indoor to prevent freezing; if it is installed outside, it must be connected to a tube of Ø≥32mm and an adequate
protection against frost must be provided to the pipe.
Once the condensate drain is connected, proceed with filling the siphon by pouring water into
the exhaust duct until the siphon is overflowed: pay attention to this phase because a siphon that
I
I
M
M
P
P
O
O
R
R
T
T
A
A
N
N
T
T
is not correctly filled can spread harmful combustion products into the room where the boiler is
installed.

0800 357 1233 | [e-mail] | trade.centralheating.co.nz Page: 15 of 42
15
2.6.2 GAS CONNECTION
The gas connection is: 15A (R1/2”) male type.
Check that the gas meter and the gas pipes are adequate to the power of the appliance (and of all the appliances
connected to the same gas line): the gas network must be designed by registered gas installer and according to current
regulations and must provide adequate dynamic pressure based on the rated power of the device.
Insufficient gas supply may cause premature damage to the appliance.
The gas supply pressure directly affects the delivered power and can cause problems if it is not correct. If the
dimensioning of the gas piping is insufficient, the customer will not be able to enjoy the maximum benefit in terms of
performance.
When connecting the gas piping, it is recommended to have an interception ball valve for emergency situations and to
facilitate maintenance; do not connect the valve directly to the boiler, but interpose a flexible connection joint.
Fuel quality: the appliance is designed to work with combustible gas without impurities. If this is not the case, an
adequate filtration system should be installed upstream of the appliance, in order to restore the necessary quality.
LPG tanks: inert gas residues (e.g. nitrogen, etc…) could remain inside new tanks resulting in a poor gas mixture and
could cause incorrect operation or product failure. The gases in the mixture could stratify during storage, causing the
variation of the fuel calorific value and altering the appliance efficiency.
2.6.3 FLUE SYSTEM CONNECTION
Coaxial flue system
In the upper part of the appliance there is a coaxial connection (Ø60 / 100mm) for the intake of combustion air (external
pipe) and for the expulsion of combustion products (inner pipe) with a socket for combustion analysis.
It is possible to install the flue system by connecting the specific flue accessories to the predisposed connection: the
flue system (coaxial extensions and curves) must have a diameter not inferior to the initial connection, be made of
materials suitable for the appliance flue temperatures and have ‘male / female’ watertight seal.
Using a Ø60/100mm coaxial exhaust system, the maximum equivalent length allowed is 30m. It is necessary to
subtract 2.0m for each 90° bend used and 1.0m for each 45° bend from the maximum equivalent length.
Beyond the 12m the boiler power is progressively reduced depending on the equivalent length of the exhaust system.
The maximum number of 90° bends is three (six for 45° bend).
It is allowed the use of any possible combination of curves and extensions that respects the maximum equivalent
length and the maximum number of bends for each section.
Before connecting the appliance to the gas mains, in order not to invalidate the warranty, it is
necessary to clean the pipe and remove any impurities or production residues that could cause
Make sure that the appliance is set up for the correct type of gas.
The exhaust system operates under positive pressure: it must be carried out by competent
personnel, qualified according to the law, following the manufacturer’s instructions and respecting
I
I
M
M
P
P
O
O
R
R
T
T
A
A
N
N
T
T
the provisions of the law and the technical regulations in force.
The type of the flue system must be listed into the classes mentioned on the data plate (locatedon
the side of the appliance). Rinnai provides a specific flue system for the appliance. Detailed
installation instructions are supplied with the flue elements. For more information contact Rinnai.
Zen boilers must be installed by always connecting a CHNZ coaxial flue system: they should not
be used without an exhaust system. The exhaust system is considered an integral part of the
appliance: it is only possible to install certified and tested exhaust systemsin combination with the
appliance.
Before proceeding with the installation of the flue system, it is necessary to carefully check that
each component is not damaged: install the component only if free from defects. Use of faulty or
damaged components and improper installation can cause serious damage to people or property.
Make sure that the flue terminal is not obstructed or blocked.

0800 357 1233 | [e-mail] | trade.centralheating.co.nz Page: 16 of 42
16
Overall dimensions and connection to the boiler
The main dimensions of some flue gas elements installed in the boiler are shown below:
Coaxial system
ø 60/100
The connection of the inlet and exhaust pipes must be
made as shown in the figure:
•inserting (≥40mm) the flue (1) in the appropriate
location (2);
•fastening the connection seal (3) and verifying the
absence of leakage.
145
200

0800 357 1233 | [e-mail] | trade.centralheating.co.nz Page: 17 of 42
17
Minimum Flue Clearances.
Extract from AS5601/AG601-2002 5.13.6.5 Fig 5.3
Main configuration of the flue system
COAXIAL FLUE SYSTEM Ø60/100mm
A) HORIZONTAL C) VERTICAL
B) HORIZONTAL EXTENSION FLUEING WITH WALL TERMINAL
L=480
mm
L=1000mm
BXFLX
90°
BXFL90CD
Ref. Item
Min.
clearances
(mm)
Fan assisted
a
Below eaves, balconies and other projections:
• Appliances up to 50 MJ/h input
200
• Appliances over 50 MJ/h input
300
b
From the ground, above a balcony or other surface †
300
c
From a return wall or external corner †
300
d
From a gas meter (M) (see 4.7.11 for vent terminal
location of regulator)
1000
e
From an electricity meter or fuse box (P)
500
f
From a drain pipe or soil pipe
75
g
Horizontally from any building structure = or obstruction
facing a terminal
500
h
From any other flue terminal, cowl, or combustion air intake
†
300
j
Horizontally from an openable window, door, non-mechanical air inlet, or
any other opening into a building with the exception of sub-floor ventilation:
• Appliances up to 150 MJ/h input
300
• Appliances over 150 MJ/h input up to 200 MJ/h input
500
• Appliances over 200 MJ/h input
1500
•
All fan-assisted flue appliances, in the direction of
discharge
1500
k
From a mechanical air inlet, including a spa blower
1000
n
Vertically below an openable window, non-mechanical air inlet, or any
other opening into a building with the exception of sub-floor ventilation:
• Space heaters up to 50 MJ/h input
150
• Other appliances up to 50 MJ/h input
500
•
Appliances over 50 MJ/h input and up to 150 MJ/h
input
1000
• Appliances over 150 MJ/h input
1500

0800 357 1233 | [e-mail] | trade.centralheating.co.nz Page: 18 of 42
18
2.6.4 ELECTRICAL CONNECTION
The appliance is supplied with an electric cable already fitted with a plug: in case of replacement, contact a qualified
technician and use only original Rinnai spare parts to avoid invalidating the warranty.
Do not use adapters, multiple sockets and extensions cords.
The boilers are in IPx5D protection class.
2.6.5 RINNAI WIFI THERMOSTAT
The boiler is supplied ready for the use with the Rinnai WiFi thermostat. The controller is pre-set to operate by
controlling the flow temperature of the heating system.To operate, the remote control must remain connected via
cable (two wires) to the device, which supplies it electricallyin low voltage: it is possible to extend the supplied electric
cable with a cable of the same section.
WiFi Rinnai thermostat installation
Prior to begin the installation, it is necessary to electrically isolate the appliance by disconnecting it from the electrical
socket.
Wall mounted:
•separate the metal bracket from the controller;
•use the bracket as template to prepare the holes for the plug (Ø6.0 x35~40mm);
•insert the plugs in the holes prepared;
•fasten the bracket with the screws;
•fix the two ends of the supplied electric cable to the two poles of thecontrol (rear part);
•install the control to the metallic bracket.
Installation in electric box:
•separate the metal bracket from the controller;
•fix the bracket to the electric box;
•fix the two ends of the supplied electric cable to the two poles of thecontrol (rear part);
•install the control to the metallic bracket.
2.6.6 THERMOSTAT OF A DIFFERENT BRAND
The Rinnai boiler can work by connecting a thermostat (optional). Or it can work by connecting a thermostat(optional),
Wall
Connect the boiler to a 230V ±10% / 50Hz power supply.
I
I
M
M
P
P
O
O
R
R
T
T
A
A
N
N
T
T
Do not use the gas or hydraulic lines for the grounding.
The electricity safety is ensured only when the device is provided with an appropriate grounding
and when the grounding system has been realized according to the safety requirements envisaged
by the law.
Make sure that the electrical system is adequate for the maximum power absorbed and is equipped
with a residual earth leakage circuit breaker.
The controller must be installed on an accessible wall, at a height of 1.2-1.5m from the ground;
located in an optimum space within the home, especially if it is used in ‘room-thermostat’ mode.
I
I
M
M
P
P
O
O
R
R
T
T
A
A
N
N
T
T
Avoid installing it in areas where the temperature is >40°C, <-20°C or with a high humidity level,
where it is directly affected by solar light, subjected to splashes of water, to the effect of chemical
agents or fouling (in particular of fatty substances).
The electrical wiring of the remote control must be in good condition: in case of damage or
deterioration it is necessary to replace it.
Do not use electrical conduits already used for high voltage cables (230V): in this case it is
necessary to replace the supplied cable with a suitably shielded cable to avoid electromagnetic
interferences.
`

0800 357 1233 | [e-mail] | trade.centralheating.co.nz Page: 19 of 42
19
keeping the Rinnai WiFi thermostat connected: in this second configuration the Rinnai command transfers the room
temperature control function to the optional thermostat. In order to connect the room thermostat of another brand to
the boiler’s electronic board, a special connector (blue) is supplied as standard.
Installation of the thermostat (of a different brand)
Isolate the appliance electrically by disconnecting it from the electrical
socket:
•remove the front panel from the boiler body taking care not to damage
the pressure gauge, first lifting it upwards and then moving it away
from the boiler body;
•remove the protective cover of the main electronic board (PCB) and
connect the supplied cable to the CN17 port at the top right of the PCB;
•insert the cable through the holes provided in the lower part of the
appliance casing and connect the secondary room thermostat
to the cable installed;
•check that the type of thermostat connected is in ‘open contact’:if it is
a ‘closed contact’ type it is necessary to modify the parameter
number.14 in menu B;
•close the PCB protection cover and assemble the front panel;
Latches
Removing the front panel
Main electric board
Plug CN17
(Blue)
•electrically power the appliance, switch on the remote control and
activate the heating function by pressing the button : the boiler
must be set on ‘flow temperature’ mode ( ); check if it operates
correctly.
Cable (blue) to connect
the room thermostat
(of different brand)
2.6.7 FILLING THE SYSTEM
Once the hydraulic, gas and electrical connections have been completed and the drainage system is connected,
proceed with filling the boiler heating circuit by opening the special tap at the base of the boiler.
At the end of the venting cycle it is possible that the system pressure has fallen below the minimum recommended
value: restore the correct value by refilling the system to the appropriate system pressure noted above.
If the deaeration cycle is not sufficient to expel most of the air in the system, it is suggested to disconnect the power
supply cable and reconnect it to repeat the boiler vent procedure. In the first uses and with a certain regularity it is
advised to check that the pressure gauge on the front panel always indicates a normal pressure value: if necessary
top up the system by operating the filling valve and restore the systempressure.
T
T
h
h
e
e
f
f
i
i
l
l
l
l
i
i
n
n
g
g
o
o
f
f
t
t
h
h
e
e
c
c
i
i
r
r
c
c
u
u
i
i
t
t
m
m
u
u
s
s
t
t
b
b
e
e
c
c
a
a
r
r
r
r
i
i
e
e
d
d
o
o
u
u
t
t
i
i
n
n
a
a
v
v
e
e
r
r
y
y
s
s
l
l
o
o
w
w
w
w
a
a
y
y
:
:
this prevents the
formation of air bubbles that cause slowdowns in the commissioning of the system and can cause
I
I
M
M
P
P
O
O
R
R
T
T
A
A
N
N
T
T
more problems in the initial phase of use.
Once the boiler has been installed, before operating it, always make sure that the system is filled
correctly and that the pressure gauge on the front panel indicates, when the heating circuit is still
cold, values from the green sector (1 ~ 1.5bar). if necessary, restore the correct values by operating
the appropriate tap at the base of the boiler.
The boiler has a vent valve built-in, on the circulation pump: make sure the valve cap is loose and
free to vent air.
Open the bleed valves of the hydraulic system and the radiators, bleeding air until only water
comes out.
By connecting the power supply cable, the boiler performs an automatic venting cycle of 60-120
min (and some internal control operations): during this phase, you do not have to press any button
on the remote control until the cycle is completed (during this phase some symbols may light up
on the display and/or disappear).

0800 357 1233 | [e-mail] | trade.centralheating.co.nz Page: 20 of 42
20
Head Z34
Head Z25/Z29
Losses Z34
Losses Z25/Z29
2.7 CIRCULATION PUMP
The boiler is supplied, as standard, with a built-in circulator with high energy efficiency.
The pump is directly managed by the PCB of the boiler and has an automatic operation: it is set for the most suitable
operation based on the measured temperature difference between flow and return.
In the lower diagram are shown the specific curve of the pump and the losses of the heat exchanger:
800
700
600
500
400
300
200
100
0
0
200 400 600 800 1000 1200
Flow rate [ l/ h]
Secondary circulating pump
In specific applications, due to the high losses in the system, the free head
of the circulation pump may be poor or insufficient for the correct circulation
of water in the heating circuit. For this purpose an optional accessory is
available to connect a secondary pump external to the boiler. The operation
of the secondary pump is managed, quite simply, like the operation of
the primary pump: the pump is activated during the heating phases, when
antifreeze protection is required, and when the initial functional test
(deaeration cycle) is performed.
The characteristics of a compatible supplementary pump are:
Voltage: 230V AC, 50Hz
Amperage: <1 A
Inrush current: <1.5 A
(pumps with special and different technical characteristics may cause the
improper functioning of the boiler and damage the PCB).
Installation:
•unplug the boiler;
•install the pump into the CH system;
•connect the pump wire to the blue CN5 connector on the PCB;
•remove the connector from the free end of the wire and join it to the
pump following the electrical scheme on the right side;
•the installation of a 3Amp fuse is recommended.
System connection
* = it is possible to connect only one secondary pump
Electrical connection of the secondary pump
Main electric board
CN5 (blue) port
(L)
pump
(N)
Head [mbar]
pump*