Installation and User Manual
REU - 16 FUA - E
“Infinity 16 i”
Continuous Flow Water Heater
Important.
Read these instructions carefully before attempting installation or use of
this appliance. All work must be carried out by competent persons.
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CONTENTS
Contents………………………………………………………………..…………………3
User Instructions.....................................................................................................4
Features and Benefits………………………………………………..………….5
Important Information…………………………………………...……..………..6
Operation without Remotes……………………………………………….……8
Temperature Controls…………………………………………….……………..9
Caring for the Infinity..................................................................................15
Error Messages…………………………………………………………………16
Restarting the Rinnai Water Heater………………………………………….18
Installation Instructions…………………………………………….………..…………19
UK Installation Instructions…………………………………………………….20
Unpacking Rinnai Water Heater…………………………….………………...21
Operation Principle……………………………………………...……………...22
Main Components………………………………………………..……………..23
Installation Instructions……………………………………………….………...25
Flue Requirements……………………...…….………………………………..30
Temperature Controls…………………………………………………………..34
Testing…………………………………………………………………......…….37
Gas Pressure Setting…………………………………………………….....….38
Dip Switch Setting………............……………………………………………...40
Dimensions…………………………...........................………………………..41
Technical Details..……………………………………............………………...42
Flow Chart…….………………………………………………......………..……43
Wiring Diagram…….……………………………………………………………44
Diagnostic Points…………………………………………………………….....45
Letter of Compliance……………………………………………………....…...46
CE Certificate……………………………..……………………………………..47
Commissioning Checklist…………………...………………………………….48
UK Warranty………………………………….………………………………….49
Specification…………………………………..…………………………………50
Service Contact……………………………….…………………………………51
3
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USERS INSTRUCTIONS
The following instructions are designed for the user of the water heater.
The user may not install or adjust the appliance in any way that requires the removal of
the front of the unit. To remove the front cover of the unit you must be certified compe-
tent to do so. Information for the Installer is given on page 22.
All work done on this appliance must be done by a qualified gas en-
gineer. A qualified gas engineer must carry an up to date CORGI
Registered Gas Installer picture identification card while working
on gas appliances. If you are unsure do not be afraid to ask the en-
gineer to show you the card. If you are still not satisfied call CORGI
on 0870 401 2300 and verify the engineers name with their data-
base. This is for your own safety.
Responsibilities of the USER
The user must abide by all warnings given in this book. The user must only reference
the user section of the book, and may not carry out any procedure listed in the installer
section.
The user must have the unit checked and maintained annually by a gas engineer.
The user must periodically check the water filter on the inlet to the appliance.
The user must not use the appliance in any way that it was not meant to be used. The
user may only use the heater as detailed in the User portion of this manual.
The user must not store or use any flammable vapours or liquids in the vicinity of this or
any other appliance.
The user should familiarise themselves with the water heaters gas service valve and the
main gas valve to the premises.
IF YOU SMELL GAS
Isolate the gas supply and get out of the building.
Do not try to light any appliance.
Do not turn any light or other electrical switch on or off.
Do not use any telephone in the building.
Call your gas engineer from a safe location and follow their
instructions.
If you cannot reach your gas engineer ring the following:
TRANSCO 0800 111 999
4
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FEATURES AND BENEFITS
Congratulations on purchasing the Technologically Advanced, Temperature Controlled,
Rinnai Hot Water System.
xꢀ The Rinnai Infinity 16i will NEVER RUN OUT of hot water. As long as electricity,
water, and gas supplies are connected, hot water is available when hot water taps are
open.
xꢀ Built into the main micro-processor is the facility to LIMIT THE MAXIMUM
TEMPERATURE of the hot water supplied. The water temperature may be set to
various temperatures. This is particularly useful when the hot water unit is installed
where young children or the infirm may be using the hot water. If required, the
temperature can be changed via the control pad on the front of the unit or with a
localised controller. For further information, please contact Rinnai.
xꢀ Rinnai Infinity internal units are powered flue appliances. This makes them
COMPACT, saving both floor and wall space.
xꢀ The temperature of outgoing hot water is CONSTANTLY MONITORED by a BUILT-
IN SENSOR. If the temperature of the outgoing hot water rises to more than 55°C the
burner is shut OFF and only turned ON again when the temperature falls to below the
selected temperature.
xꢀ The burner lights automatically when the hot water tap is opened, and extinguishes
when the tap is closed. IGNITION IS ELECTRONIC, so there is no pilot light. When
the hot water tap is off, no gas is used.
xꢀ The 16i has a built in controller on the front of the unit for easy control. Two additional
external temperature controllers can be mounted remotely from the heater. This offers
the following additional features:
Localised temperature setting.
Diagnostic message.
Error Codes.
xꢀ Temperatures selected at the controllers are retained in the SYSTEM MEMORY
when the controller gives up priority or the system is turned off. Temperatures over
550C will revert to 550C when power and/or priority is regained.
xꢀ Operating NOISE LEVEL IS VERY LOW.
xꢀ ERROR MESSAGES ARE DISPLAYED on the Temperature Controllers, assisting
with service.
xꢀ FROST PROTECTION device built in as standard.
5
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IMPORTANT INFORMATION
Excessively hot water is dangerous, especially for young children and the infirm. The
water heater allows you to control the temperature of your hot water to safe levels.
Water temperature over 50ºC can cause severe
burns instantly or even death from scalding.
Children, disabled and the elderly are at the
highest risk of being scalded by excessively hot
water.
Always test the temperature of the water before
bathing or showering.
Burns from hot water taps can result in very
severe injuries to young children.
Hot water at 65°C can severely burn a child in less
than half a second. At 50°C it takes five minutes.
Burns can occur when children are exposed
directly to hot water or when they are placed into a
bath which is too hot.
Do stay with children
whenever they are in the bathroom.
xꢀ Consider child—resistant taps
Do take them out of the bathroom if
you need to answer the phone or
door.
or inexpensive tap covers, both
of which prevent a child’s hand
from turning on the tap.
Do test the temperature of the water
with your elbow before placing your
child in the bath.
xꢀ Consider reducing the
temperature of the water
supplied to the hot tap to 500C.
Do make sure that the tap is turned
off tightly.
DO
This approach can be extremely
valuable because it requires a
one time action for a long term
reduction in risks of scalds.
This type of automatic protection
is important during times when a
parent or carer has been
Do consider setting your Rinnai
Infinity or HD50i at a maximum
temperature of 500C.
Do install a child proof tap cover
OR,
distracted.
Do install a child resistant tap.
Do not leave a toddler in the care of
another small child. The older child
may not have safely set the temperature.
DO
NOT
6
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IMPORTANT INFORMATION
Always check water temperature before
use.
Hot water may go cold without warning at
very low water flows (less than 3 l/min.)
OFF
Refer to warning about hot water on
page 16 for important safety information.
The Infinity 16i controls the water tem-
perature automatically. For high tempera-
tures it may reduce the flow. The water
from the hot tap may be reduced after
the temperature shown on the remote
control is raised. The water flow may also
vary with the temperature of the incoming
water supply.
If freezing temperatures
are expected, turn off the
water and gas, and drain
the water heater.
1. Water Off
2. Gas Off
Drainꢀ
Waterꢀ
Drainꢀ
3. Drain Water
Gasꢀ
If the power is left on the
Automatic Frost Protection
will prevent the unit from
Freezing. Frost protection
is standard on all units.
Keep flammable materials, trees, shrubs,
chemicals, etc. away from the flue outlet.
Do not touch the flue outlet. Do not insert
objects into the flue outlet.
On cold days steam may be discharged
from the flue outlet. This is normal, do
not be alarmed. It does not indicate a
fault.
7
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TEMPERATURE CONTROLS
The purpose of a Temperature Controller is to enable the user to have complete control
over the hot water supply. Used correctly, the Infinity will supply hot water at the
temperature selected, even when the water flow is varied, or when more than one tap is
used. Adjustments to the operation of your hot water unit can be made with any of the
Temperature Controllers. Each Temperature Controller can be individually programmed.
Up to three Temperature Controllers can be fitted with the Infinity 16i. One of these
controllers comes as standard mounted on the water heater. Additional Temperature
Controllers are an optional extra.
The controllers have temperature selection, water flow volume, and water supply
temperature functions.
Various water temperatures (°C) can be selected as follows:
35, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 50, 55, 600C
750C can be set on the dip switches.
When the remote is turned on the temperature will default to 400C.
While the hot water is running, the maximum selectable temperature will be 48°C. This
provides additional safety for the consumer.
Suggested temperatures are:
Kitchen 50°C - 60°C; Bathroom 39°C - 43°C
These temperatures are suggested starting points for selection. You may find higher or
lower temperatures are more comfortable. Maintaining lower temperatures helps to save
energy. To obtain water temperatures lower than 35°C simply add cold water.
Up to three controllers can be used for one Infinity 16i. When multiple temperature
controllers are used the only remote that can change the temperature is the one with
priority. This is shown by the lit priority indicator. When the Kitchen Controller has
priority the other remote’s priority indicator will go out. When the Bathroom Controller
has priority the other remote’s priority indicator will flash. A different remote can only
take priority of the system by pushing the priority button when the priority lamp is out.
This means that while the Bathroom Controller has priority no one else can alter the
temperature.
To take priority with the Kitchen Controller from the Bathroom Controller the priority
button on Bathroom Controller must be pressed to give priority away.
The temperature selected by the controller with priority will be available to all outlets.
9
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TEMPERATURE CONTROLS - OPERATING
Remote temperature controllers are a feature that provides control over the water
temperature. The Rinnai Infinity 16i water heater can be operated with 1, 2, or 3
temperature controllers. The controller MC-45-SR-EU comes as standard with this
water heater installed into the front panel.
Digital Monitor
Priority Indicator
Priority Button
Indicates the tem-
perature selected.
Error message
flashes in the event
of a fault.
Indicates that the
controller has com-
mand of the system
(glowing,) or that the
system is free to take
command of (off.)
Used to transfer con-
trol between tem-
perature controllers.
The controller with
priority has command
of the hot water de-
livery temperature.
Temperature
Buttons
ON / OFF Button
Used to switch hot
water system on
and off.
Used to select hot
water delivery
temperature.
NOTE:
Each time a button is pressed, a BEEP will sound.
The BEEP sound can be muted by depressing the Temperature Controller Up and Down
buttons simultaneously for more than 3 seconds until the controller beeps.
This can be done for each Temperature Controller.
To return to original settings, repeat this step.
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TEMPERATURE CONTROLS - OPERATING
Using the Temperature Controllers.
Press the ON/OFF button on a temperature controller.
The system will become active, the temperature will
default to 400C and the controller that turned the
system on will have priority. The temperature setting
on the controller will light up.
Adjusting Temperature
Simply press the Hot Water Temperature Up or Down
arrow button until the desired temperature is displayed
on the digital display.
COOLERꢀ
HOTTERꢀ
To operate the heater, simply turn any hot water tap on. This will automatically light the
burner providing hot water. The red IN USE indicator will glow
amber on the temperature controller.
Caution: Always check water temperature before use.
With the hot water tap open a temperature of 500C or higher can not be
selected. For safety reasons temperature ‘priority’ cannot be transferred
between controllers when a hot water tap is open.
Note:
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TEMPERATURE CONTROLS - OPERATING
Using 2 or more Temperature Controllers.
Switching the system ON.
The hot water system and all controllers can be
switched ON and OFF from any controller by pressing
the ON/OFF button as shown. When the system is
turned ON the water temperature display will be lit.
.
During normal operation the system is left ON. Do not
push the ON/OFF button when water is running.
Ensure the system is switched On by verifying the
temperature display is lit. Ensure the controller has
priority by verifying the ON LED indicator is lit. If it is
not then press the Priority button once. This gives
the local controller priority of temperature over the
system.
Select the desired temperature using the TEMP.
SELECTOR buttons. The selected temperature will be
displayed on all controller displays. This is the water
temperature which will be supplied from the heater.
COOLERꢀ
HOTTERꢀ
Using hot water.
Open the hot water tap. The appliance
will be activated and the IN USE indica-
tor will be lit.
When temperatures 500C and above are
chosen the High Temp lamp will be lit.
Bathroom temperatures should be no more than 500C.
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TEMPERATURE CONTROLS - INFORMATION
Do not push the ON/OFF button on the
Master controller after transferring priority
of temperature selection to a Secondary
controller as the system will shut down.
Temperature priority can not be switched
to another controller when the water is
flowing through the water heater.
400C
Do Not Turn OFF
the Master
Controller
Controller 1
in use
Controller 2
cannot take
priority
If a temperature 500C or higher has been selected on a controller and priority of tem-
perature selection is transferred to another controller, then back again, the temperature
on the controller will automatically drop to 50(or 42)ºC. If the set point is 50(or 42)0C or
less it will not alter. This is a safety feature.
First
Another
First
Controller
Controller
Controller
Depending on the weather conditions
and the length of the pipe between the
heater and the tap in use, there may be a
variation between the temperature dis-
played at the controller and the tempera-
ture at the tap.
Do not clean the control with
solvents or detergents. Use only a soft
damp cloth.
480C
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CARING FOR THE INFINITY
Maintenance
Even if there does not seem to be a problem with the water heater it is required in the
UK that all gas appliances are serviced every year by a certified gas engineer. This is to
ensure continued safety of the gas appliance. If you need a recommended service
engineer contact Rinnai or your supplier.
Care
When the appliance casing, operation panel, and remote controls surfaces become dirty
gently wipe them clean with a soft, damp cloth. Do not use detergents on these parts.
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ERROR MESSAGES
Rinnai water heaters have the ability to check their own operation continuously. If a fault
occurs, an error code will flash on the Digital Display if you have temperature controllers
installed. This assists with diagnosing the fault, and may enable you to overcome a
problem without a service call. Please quote the code displayed when enquiring about
service. Some of these remedies can not be checked by the user because they require
the front to be taken off of the unit. They are included so that you can give the
information to the gas engineer.
Code
Fault
Remedy
Displayed
-
Noticeable reduction in water
flow
Inlet water filter needs to be cleaned.
Not enough combustion air
Check for physical blockages around
air intake or exhaust. Check combus-
tion fan.
10
No Ignition / Gas supply
Check gas valves, gas supply and
ignition unit.
11
12
Flame failure / Earth Leakage
Check gas valves and gas supply.
Check flame rod.
Check earth wire lead.
Check remote control.
High flame safety device
Over temperature warning
Check overheat circuit
14
16
Modulating control valve problem or
water flow control valve problem
Outgoing water temperature
sensor faulty
Check Hot Water Thermistor and wire
32
Combustion Air temperature
sensor faulty
Check Air Intake Thermistor and wire
34
Gas modulating valve faulty
Combustion fan failure
Check gas modulating valve and pcb.
Check Combustion Fan
52
61
71
Micro-processor failure or Sole-
noid circuit failure
Check solenoids and pcb.
Flame rod circuit error
Check flame rod and pcb.
72
* In all cases, you may be able to clear the Error code by turning the hot water tap OFF, then ON
again. If this does not clear the error, try pushing the On/Off button OFF then ON again. If the Error
Code still remains contact Rinnai or your nearest service agent for advice.
** Faults caused by insufficient gas/water supply or gas/water quality and installation errors are not
covered by the manufacturer’s warranty.
Regular maintenance should be performed by a competent person in accordance
with the local regulations at least once annually.
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ERROR MESSAGES
Troubleshooting without controllers
If you have not installed temperature controllers and experience the following
symptoms, please carry out the suggestions below. If symptoms continue, please
contact Rinnai for advice.
Fault
Remedy
Heater does not attempt Check the power is on at the heater.
to start at all.
Check the cold water valve supplying the heater is open.
Heater starts then shuts Check the power is on.
down immediately.
Check the gas valve at the heater and at the gas meter is fully open.
Open the hot water tap fully.
Heater starts then the
water goes cold.
Check the power is on.
Open your hot water tap further or try another hot outlet.
NOTE: Faults caused by insufficient gas/water supply or gas/water quality and
installation errors are not covered by the manufacturer’s warranty.
Installations with circulation pumps
With temperature controller fitted.
If you have an installation using a secondary circulation pump this must be
switched off so that there is no flow through the heater when starting or after a
power failure. If the pump is running the unit will not operate (no display on the
controller). Isolate pump then start heater before restarting pump. This is a safety
feature.
The pump should also be fitted with a thermostat to prevent the return temperature
reaching the heater set point temperature.
Without temperature controller fitted.
The heater should automatically reset and provide water at the temperature set by
the internal limit switches.
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RESTARTING THE RINNAI WATER HEATER
Following a power cut the heaters should be restarted in this manner.
Standard system.
Single or multiple water heaters without remote controllers.
The heaters will automatically reset without any user involvement.
Single or multiple water heaters with remote controllers.
The heaters will be required to be switched on using the ON/OFF button on a remote
controller. Ensure that all taps/water outlets are closed and no water is flowing through
heaters.
Hot water system incorporating secondary recirculation pump.
Single or multiple water heaters without remote controllers.
The heater(s) will automatically reset without any user involvement.
Single or multiple water heater(s) with remote controller(s).
To reset the heaters follow the steps.
1. Turn off all hot water taps.
2. Turn off supply to secondary circulating pump or alternatively, if heater and pump
are fed from the same electrical supply, isolate pump flow.
3. Turn on heater at remote control.
4. Select required temperature.
5. Switch on supply to secondary circulating pump or open valve on pump flow.
The heater will now be ready to supply water at the set temperature.
If following the above procedure does not reset the heater switch it on and off at its main
supply, and then go through these steps again. If heater is still not working call your local
service agent or Rinnai for assistance.
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INSTALLATION INSTRUCTIONS
STOP
To go beyond this point in the manual you must be a
registered gas engineer.
Do not attempt to install this appliance if you are not
qualified.
If the information in this manual is not followed exactly a
fire or explosion could result.
This manual must be read in its entirety before installing
the appliance.
If you are unsure of any point contact Rinnai or your
supplier.
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UK INSTALLATION INSTRUCTIONS
IMPORTANT INFORMATION
This appliance may only be installed by someone certified competent to do so.
At the time of printing the only people deemed competent to install this
appliance are those that are CORGI registered for this type of appliance in this
type of location who have a current ACS certificate.
1. Gas safety (Installation & Use) regulations 1998 are the ‘Rules in force’. In your
own interest and that of safety, it is law that all gas appliances are installed by
competent persons in accordance with the above regulations. Failure to install
appliances correctly could lead to prosecution. Other persons should NOT attempt to
install this equipment.
2. Building Regulations G3 require installers of unvented systems to be competent to
do so. Competence can be shown by holding a current certificate in Unvented
Domestic Hot Water Systems. If the Infinity is installed in a flow and return, or tank
system, or any other closed system then the system is unvented.
3. Installation must be carried out in accordance with the current issue of the following:
Building Regulations issued by the Department of the Environment
Building Standards (Scotland) Regulations.
I.E.E. Wiring regulations for electrical installations.
Gas safety (Installation and Use) Regulations current issue.
BS 5546
BS 5440
BS 6891
BS 5482
BS 6700
BS 6644
Institute of Gas Engineers Publications
Local byelaws
Water regulations
Health and safety at work etc. Act 1974
IGE/UP/10 Part1 Edition 2.
Building Regulation J
Such other specifications and regulations that may supersede or complement the
above documents.
Please be sure that you are fully aware of your obligations and responsibilities
under these regulations.
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OPERATION PRINCIPLE
HOT WATER SUPPLY OPERATION
Ignition
Press ON/OFF Button of Remote Controller to turn on unit and the remote control-
ler display and priority LED will light up.
When a hot water tap is opened the Water Flow Sensor revolves and sends a pulse
signal to the Printed Circuit Board (PCB.) When the PCB detects water flow it be-
gins the ignition process with the Combustion Fan Motor starting first.
Once the air proving is made the Main Solenoid Valve and Change-over Solenoid
Valves are opened and the Burner is lit by the sparking Igniter.
Temperature Setting
With the Temperature Control Buttons on the remote controller the outlet tempera-
ture can be set from 37ꢀ-ꢀ60͠. When the temperature set point is above 50͠ the
High Temperature Indicator glows.
Temperature can not be set above 50͠ while hot water is in use.
Standby
When the hot water tap is closed the PCB no longer receives a pulse signal from the
Water Flow Sensor. The PCB shuts the Main Solenoid Valveꢀand Change-over So-
lenoid Valves and the Burner extinguishes.
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MAIN COMPONENTS
1. Gas Control Unit
1.1 Modulating Valve
This device is used by the PCB to adjust the volume of gas to the burner in proportion to the
volumetric flow rate of water in order to maintain a supply of constant temperature hot water
amid changes in water flow rates and incoming temperatures.
1.2 Change-over Solenoid Valves
Additional solenoid valves are included to section the burner and stage the control in 3
steps. This gives the Burner more steady combustion at the required capacity and allows
the water heater to operate at very low flow rates and temperature rises.
2. Flame Rod
Monitors combustion characteristics inside the combustion chamber. If the flame fails, gas
supply is stopped. Works through rectification of the combustion flame. An AC voltage is
supplied to the flame rod. Electrons can only pass from the rod to the flame, and never from
the flame to the rod, so the resultant DC current is used to prove combustion. When the DC
current is present the burner has normal combustion, if the DC current is not present the unit
shuts the solenoid valve.
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MAIN COMPONENTS
3. Thermal Fuse
The thermal fuse is an electric link which must be intact for the unit to operate. If the
thermal fuse reaches a set temperature it will melt and the unit will shut down. The ther-
mal fuse must be replaced if it melts. It is to protect against over heating and heat ex-
changer splits where water may leak out and be super heated into steam.
4. Overheat Safety (Bi-metal Switch)
This Bi-metal Switch is fixed at the bend of the Heat Exchanger hot water outlet. If the
temperature outlet from the heat exchanger reaches 950C the bi metal switch will open
and the solenoid valve circuit is broken. This will cease combustion in case of overheat.
5. Combustion Fan
The combustion fan supplies primary air into the wing burners and secondary air up
through the Bunsen style burners. The fan is DC low voltage and the speed is controlled
by the PCB depending on the hot water supply and temperature. The fan speed is com-
pared to the current required to attain that speed for air proving. If the fan current is over
or under the parameters for the given speed the unit will shut down on air proving.
6. Water Volume Servo with Water Flow Sensor
6.1 Water Flow Sensor
Water flow sensing is done with a small turbine that spins when water travels through it
in the correct direction. Each of the four fins on the turbine has a small magnet on it.
Outside of the valve there is a magnetic sensor that detects the speed that the turbine is
revolving. The revolution speed is input to the PCB which relates this speed to the water
flow volume and determines whether it is sufficient for ignition.
6.2 Water Volume Flow Servo
The water volume is adjusted by opening and closing the water flow valve with the servo
motor. This will limit the maximum hot water flow to 20 L/min, and will limit the water
flow further when the burner is at high fire to ensure the temperature setpoint it met.
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INSTALLATION INSTRUCTIONS - POSITIONING
Appliance Location.
The wall or structure on which it is mounted must be capable of supporting the weight of
the appliance (15 kg) and associated pipework. Ensure that suitable screws or bolts are
used to secure the water heater to the wall. Bracket and fixing hole locations are shown
on the template included. The top bracket has a keyhole slot so that the appliance can
be hung on one screw, and then the other fixings can be added to secure the unit.
The heater must be installed in the vertical position with the gas and water connections
on the underside pointing vertically downward. The heater must be installed internally.
The appliance should be placed as close as practical to the most frequently used hot
water outlet point or points to minimise the delay time for hot water delivery. For
installations where the distance between the unit and hot water outlet points is
considerable, the appliance can also be fitted in a 'flow and return system' which
minimises the waiting time for hot water delivery. Alternatively, multiple appliances can
be strategically placed to service outlet points with minimal delay time. Contact Rinnai or
your supplier for further information.
When positioning appliance the flue terminal clearances must be in accordance with lo-
cal requirements. Consideration should be given to other appliances, openings, and
boundaries. Multiple heater installations can be installed with the heaters manifolded
together. The minimum distance required between the heaters may then be based on
the necessary clearances between flue terminals.
The appliance must be in an accessible location. Sufficient clearances shall allow
access to, and removal of, all serviceable components. The following clearances should
be followed.
If the unit is installed on a
combustible wall such as wood
there must be a 45mm gap
between the wall and the back
of the unit. Brackets are avail-
able to space the unit this far
off of the wall.
In case the side wall next to
the appliance is flammable
material there must be at least
50mm between the side of the
appliance and the combustible
wall.
The illustration shows the
clearances necessary for
servicing, on a non-
combustible wall.
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INSTALLATION INSTRUCTIONS - CONNECTIONS
Water Supply.
Where the water supply pressure exceeds 7 bar, an approved pressure reducing
device is required at the inlet of the appliance. To achieve the maximum rated flow a
minimum water supply pressure of 1.1 bar is required at the appliance inlet. The unit will
operate at lower supply pressures but the maximum flow rate will not be achieved. Contact
Rinnai or your supplier for 'gravity fed' or 'low pressure' hot water installations.
Water pipe sizing and layout should be designed correctly to ensure the given water flows
from the appliance are available. All hot water pipework should be insulated to optimise
maximum performance and energy efficiency.
Water Connection.
Connect the hot and cold water supply pipes as shown on the following page. An approved
isolation valve and strainer MUST be installed in the cold water inlet pipe. An approved iso-
lation valve and draining point should be installed in the hot water outlet pipe. There must
be a union or release fitting on the heater side of the isolation valves. An unvented kit to lo-
cal regulations must be installed in the pipework when the system is closed (i.e. has a flow
and return, or tank.)
Positions of the cold water inlet, hot water outlet and gas connections are shown on page
41.
If the heater is in a hard water area a suitable water conditioning device should be installed
to prevent the build up of limescale within the heat exchanger. Heat exchangers damaged
by scaling are not covered by the manufacturer’s warranty.
Total Dissolved
Solids (TDS)
Description
pH
Total Hardness
150 mg/litre
Chlorides
Magnesium
10 mg/litre
Calcium
Sodium
Iron
Maximum Recommended
Levels
6.5 - 9.0
600 mg/litre
300 mg/litre
20 mg/litre
150 mg/litre
1 mg/litre
Gas Connection
Check pipe sizing required for the heater input. The gross heat input for the Infinity 16i is
34.9 kW (G20); 29.6 kW (G25); 37 kW (G30, G31.) The size of the gas meter and pipework
must be sufficient for all appliances on the main. Sufficient gas must be available at the
appliance if correct operation is to be expected; insufficient gas will damage the unit. An
approved gas isolation valve must be fitted at the gas inlet. A union or release fitting should
be installed after the isolation valve.
Electrical Connection
The appliance must be earthed. The appliance is suitable for 230VAC – 50Hz mains only
and all wiring must be carried out to local regulations.
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UK INST. INSTRUCTIONS - CONNECTIONS
Water Connection.
For all closed systems (with flow and return or tank) the system must incorporate an un-
vented kit with the components shown below. The safety relieve valve must discharge
safely into a suitable drain via tundish.
Expansion
Vessel
Safety
Relief
Valve
Mains
Isolation
Valve
Pressure
Reducing
Valve with
Gauge
Double
Check
Valve
Y- Strainer
Tundish
Gas Connection
Refer to BS6891 (Natural Gas) and BS5482 (Propane) for guidance on correct pipe sizing
calculation. There must be 20 mbar Natural Gas (G20) or 34.5 mbar Propane (G31) at the
inlet of the appliance with all appliances at high fire.
Electrical Connection
The heater electrical supply must be installed to the latest I.E.E regulations. If the unit is
hard wired (moulded plug removed) it must be provided with a fused (3A) local isolator with a
contact separation of 3mm minimum on all poles for servicing. Observe polarity and ensure
that wiring is correctly restrained.
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INSTALLATION INSTRUCTIONS - SCHEMATICS
Single Infinity Direct Flow
Direct feed to the hot water outlets.
Mains is fed directly into the unit.
Standard domestic or small commercial set up.
Used with controllers to alter the temperature at the point of use
(only using hot tap) or temperature set on the dip switches for the
maximum needed at any outlet, and mixed down by TMVs or
manual tempering valves.
This information is intended as a guide only, it does not imply
compliance with water or gas installation regulations.
Components will vary depending on the actual installation.
Check local regulations before installation.
Draining Point
Manifolded Infinity x 2 With Pumped Secondary.
Circulation system used in commercial
situations where the heaters are not close to
the outlets. Ensures hot water is available at
the outlets quickly, without a lot of wastage.
Mains is fed to the unit via a header pipe that
branches off to each heater. The secondary
return is Tee’ed in to the heater’s supply. A
complete unvented kit is required as it is a
closed system.
PAM valves included to decrease flow rate
needed from pump.
Hot Water
Temperature is set on the dip switches for the
required circulation. 60°C for most
applications.
Pump
Gas
Cold Water
Return Water
This information is intended as a guide only, it does not imply
compliance with water or gas installation regulations.
Components will vary depending on the actual installation.
Check local regulations before installation.
Pressure
Reducing Strainer
Valve
Non-
Return Safety
Valve
Flow
Modulation
Valve
Draining Valve
Point
Expansion
Vessel
Valve
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UK INST. INSTRUCTIONS - VENTILATION
General Information.
This appliance must be installed in accordance with the rules in force. Consult instruc-
tions before installations and use of this appliance.
The unit must be installed by a competent, authorised person. It is the installer’s
responsibility to ensure that the unit has been installed to all current requirements.
The Rinnai Infinity 16i is a room sealed appliance. Ventilation requirements of BS 5440
allow room sealed appliances to be installed in spaces and rooms, including bedrooms,
without ventilation.
If the Rinnai Infinity 16i is installed in a compartment it must have the following amount
of permanent ventilation.
Ventilation from compartment to room:
320 cm2 at high level AND
320 cm2 at low level
Based on 10cm2/kW net heat input
Ventilation from compartment directly to outside:
160 cm2 at high level AND
160 cm2 at low level
Based on 5 cm2/kW net heat input
The area given is the free area of the vent or equivalent free area for ventilators of more
complex design. Any space taken up by grille louvers should be subtracted from the
total area to find the free area of the vent.
Windows and doors can not be considered ventilation unless they are permanently fixed
in the open position.
Please refer to IGE/UP/10 Part 1. Edition 2 page 17 for further information or contact
Rinnai UK.
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FLUE REQUIREMENTS - INSTALLING
The flue must be installed by a competent, authorised person. It is the installer’s
responsibility to ensure that the unit has been installed to all current local require-
ments.
Ensure that the flue terminal and hot water outlet connection cannot be touched by
children. The flue must be clear of obstructions and shrubbery.
Flue Length.
The flue Total Equivalent Length is limited to 6.5m. Each 900 bend should be consid-
ered 0.5m of the Total Equivalent Length. The maximum number of bends is 3.
Separate instructions are provided with the flue detailing the installation of the flue parts.
Flue pipes must include a condensate drain if the total flue height exceeds 1.5m. There
is a special condensate drain collector piece available through Rinnai or your supplier.
For flue runs requiring a drain the horizontal sections on the appliance side of any verti-
cal runs should slope towards the appliance, and the flue should be bracketed to prevent
sagging. If the terminal is horizontal it should slope gently to the outside to prevent in-
gress of rain.
The drain pipe should be run in 22mm PVC, uPVC, or ABS pipe, copper is not recom-
mended. The drain pipe MUST be trapped. A trap with pipe is available from Rinnai or
your supplier.
Although the flue and appliance have been specially designed to prevent condensation
in the flue for short runs (under 1.5m) care should be given to the placement of the
terminal to prevent risk in the unlikely event of condensation. Condensation water can
cause burns, and during winter could cause a slip hazard. It is the responsibility of the
installer to decide the best place.
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FLUE REQUIREMENTS - INSTALLING
The following flue manufacturers with their specific brands listed below are approved for use
with the Rinnai Infinity 16i water heater.
1. UBBINK
The following combinations of flue materials may be used with the Rinnai water heater
Rolux® flue system
Roof terminal black T200 L =1000 mm
Wall terminal T200 Alu 800mm black
Wall terminal T200 Alu 800mm white
2. Muelink & Grol
The following combinations of flue materials may be used with the Rinnai water heater
Walloutlet 60/100 type M 2000 with short bend adaptor.
Roofoutlet 60/100 type M 2000 incl. adaptor.
Roofoutlet concentric 80/125 type M 2000
Concentric air/flue system 60/100 and 80/125.
Vertical appliance adaptor 60/100
3. Groppalli
The following combinations of flue materials may be used with the Rinnai water heater
A03.001.000813: Coaxial 60/100 wall flue kit;
A03.001.000276: Coaxial 60/100 90° bend;
A03.001.000278: Coaxial 60/100 1.000mm L pipe.
B0N.006.000001 Adaptor Kit from 60/100 to 80/125
A05.023.000021 Roof 80/125 flue
A05.025.000002 Roof tile
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UK FLUE REQUIREMENTS - INSTALLING
The Rinnai Infinity 16i is for internal installation in conjunction with the Rinnai flue
system
The flue must be installed in accordance with:
Manufacturers Installation Instructions
British Standards including BS5440
Gas Safety (Installation and Use) Regulations
IGE/UP/10 Part1 Edition 2.
Building Regulation J
Such other specifications and regulations that may supersede or complement the above
documents.
The flue must be installed by a competent, authorised person. It is the installer’s
responsibility to ensure that the unit has been installed to all current
requirements.
Location of the appliance flue terminal must be in accordance with the clearances shown
in BS5440-1:2000. Table and Figure C.1 is provided for your guidance on page 33.
When multiple room sealed forced draught terminals are installed together there must be
enough of a gap to satisfy the requirements of the regulations. Under current
regulations the terminals must have at least a 300mm gap between them. The flue
terminal should be over 2m from ground level whenever possible. For lower installations
a terminal guard must be installed.
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UK FLUE REQUIREMENTS - POSITIONING
Dimension Terminal Position
Distance
A
B
C
D
E
F
G
H
I
Directly below an opening, air brick, opening windows, etc.
300mm
300mm
300mm
75mm
Above an opening, air brick , opening window, etc.
Horizontally to an opening, air brick , opening window, etc.
Below gutters, soil pipes or drain pipes.
Below eaves.
200mm
200mm
150mm
200mm
300mm
600mm
1200mm
Below balconies or car port roof.
From a vertical drain pipe or soil pipe.
From an internal or external corner.
Above ground, roof or balcony level.
From a surface facing the terminal.
From a terminal facing a terminal
J
K
L
From an opening in a car port. ( eg door, window) into a dwelling 1200mm
M
N
O
P
Q
Vertically from a terminal on the same wall.
Horizontally from a terminal on the same wall.
From the wall on which the terminal is mounted
From a vertical structure on the roof.
1500mm
300mm
N/A
N/A
Above an intersection with roof.
N/A
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TEMPERATURE CONTROLS - INSTALLATION
When deciding on the best position for the temperature controls, the following points
should be taken into account.
xꢀ Fit the controls out of reach of children (suggested height from the floor 1.5m.)
xꢀ Avoid positions where the controllers will become hot. Do not fit them near stoves or
ovens, or above radiators or heaters.
xꢀ If possible, avoid exposure to direct sunlight or positions where bright lights will make
the digital display difficult to read.
xꢀ Position away from areas where the controller will be prone to splashing by cooking
products such as oils and fats.
xꢀ The temperature controllers are water resistant, however they should be positioned
away from areas where direct or persistent splashing could occur.
xꢀ Refer to the local electrical wiring regulations current edition for location requirements
in shower and bath areas.
xꢀ The cables to the temperature controller carry only 12VDC (extra low voltage.)
xꢀ When using more than one temperature controller the signal cable should be run in
parallel. That is, from controller to controller to heater, or from each controller to the
heater. Do not wire the controllers in series.
The installation in every application will vary, therefore the temperature controller cable
has been provided so that you may cut the length accordingly and fit the spade
connectors, ensuring a good connection.
Cables are simply ‘piggy-backed’ at the water heater or at the primary temperature
controller. Polarity is not important when connecting the cables, either colour wire can
be connected to either terminal at both the heater or primary temperature controller. If
more cable is needed any cable with similar specification to the cable supplied with the
controller can be used. Maximum length is 50 metres.
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GAS PRESSURE SETTING
The working gas pressure on the water heater is electronically controlled and factory set.
Under normal circumstances it does not require adjustment during installation. Perform
this procedure only if the unit is not operating correctly and all other possible causes for
incorrect operation have been eliminated. Contact Rinnai before attempting
to alter the gas pressure. Failure to do so could void the warranty.
1. Turn 'OFF' the gas supply.
2. Turn 'OFF' 230V power supply.
3. Remove the front cover from the appliance.
4. Check gas type dip switches no.1 and no. 2
are in the correct position for the type of gas
(Nat. or LPG)* you are using. See Fig. 1
off on
off on
SW
1
2
SW
1
2
-Nat. Gas
-Nat. Gas
-LPG
-LPG
Fig. 1
3
3
4
4
5
5
6
6
7
7
8
8
On is in the right hand position, Off is in the
left hand position.
5. Attach pressure gauge to burner test point. (Fig. 2)
6. Turn 'ON' the gas supply.
Fig. 2
off on
SW
7. Turn 'ON' 230V power supply.
1
2
3
4
5
6
7
8
8. If remote controllers are fitted, turn the unit 'ON' at the
controller and select a maximum delivery temperature.
9. Open a hot water tap fully. (CAUTION: Ensure
building occupants do not have access to hot water
outlets during this procedure.) Wait for the unit to
light.
Fig. 3
10.Set the Rinnai Infinity to 'Forced Low' combustion by
setting No. 7 dipswitch to 'ON'. (Fig. 3)
* Note:
Simply changing the position of the dip switches will not convert the unit from
one gas type to the other. The conversion procedure requires a change of
injector manifold. Contact Rinnai or your supplier.
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DIP SWITCH SETTING
Dip Switch Positions Explained
OFF ON
SW
1
- Gas Type
LEGEND:
2
- Gas Type
Black Section indicates
position of dip switch.
3
- Computer Programming
- Computer Programming
- Computer Programming
- Max. Temperature
- Combustion
4
OFF ON
OFF
OFF ON
ON
5
6
7
8
- Combustion
Dip Switches Explained
GAS TYPE
COMBUSTION
NORMAL
LPG
NAT GAS
OFF ON
OFF ON
OFF ON
SW
1
SW
1
SW
7 off
8 off
off
off
on
off
2
2
FORCED LOW
OFF ON
SW
7 on
8 off
COMPUTER PROGRAMMING
OFF ON
SW
1
Computer programming
Switches (3-5) must be left
in the factory set position
for the Infinity 16i.
2
FORCED HIGH
3
OFF ON
4
SW
7 on
8 on
5
6
7
8
MAXIMUM TEMPERATURE
OFF ON
6 Maximum Temperature = 600C
6 Maximum Temperature = 750C
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DIMENSIONS
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TECHNICAL DETAILS
Infinity Model
Units
Infinity 16i
Installation
Internal
1.8
G20 Nat Gas Press Low
G20 Nat Gas Press High
G25 Nat Gas Press Low
G25 Nat Gas Press High
G30 LPG (Butane) Press Low
G30 LPG (Butane) Press High
G31 LPG (Propane) Press Low
G31 LPG Propane) Press High
Height
mbar
mbar
mbar
mbar
mbar
mbar
mbar
mbar
mm
9.0
1.8
9.0
2.2
11.4
2.2
14.2
675
370
130
15
Width
mm
Depth
mm
Weight
kg
Flue System
Concentric Forced Draught
Temp. Range Controllers
Max Temp. via dip switch
Ignition
35 - 60
75
deg C
deg C
Direct Electronic Ignition
Gas Consumption Low (Gross)
G20 Nat Gas
4.7
4.0
4.9
4.9
kW
kW
kW
kW
0.4
0.4
.35
.35
m3/hr
m3/hr
kg/hr
kg/hr
G25 Nat Gas
G30 LPG (Butane)
G31 LPG (Propane)
Gas Consumption High (Gross)
G20 Nat Gas
34.9
29.6
kW
3.26
3.26
2.6
m3/hr
m3/hr
kg/hr
kg/hr
G25 Nat Gas
kW
G30 LPG (Butane)
G31 LPG (Propane)
Max Flow raised 25C
Min Operation Flow
Water Pressure Nom.
Power Supply
36.8
kW
36.5
kW
2.6
15.2
L/min
L/min
bar
2.4*
1.1 - 7.0
230 V / 50 Hz
68
Electric Consumption
Watts
* Minimum operation flow based on temperature setpoint and inlet conditions.
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FLOW CHART
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WIRING DIAGRAM
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DIAGNOSTIC POINTS
Determination (normal figure)
Upper : Voltage
Flow
Chart
No.
Measurement point
Component
Remark
CN
Wire Color
Lower : Resistance, Current
I
B-Br
R-B
AC power
AC200㨪AC240V
GEARED
MORTOR
A1
Drive power
Ԙꢀ
DC11㨪13V
10㨪30ǡꢀ
R-Bk
Y-Bk
Control power
DC11㨪13V
Below DC1V(limiter ON)
Full open limiter
Below DC4㨪6V(limiter OFF)
Br-Bk
Bk-W
R-Bk
Below DC1V(limiter ON)
Below DC4㨪6V(limiter OFF)
Full close limiter
REMOTE CON
TROLS
WATER FLOW
SENSOR
E1
A2
ԙꢀ
Ԛꢀ
DC11㨪13V
DC11㨪13V
ON2.4L/min
(35Hz) over 2100
pulse/min.
OFF1.7L/min
(24Hz) below 1440
pulse/min
Y-Bk
DC4㨪7V(pulse 17㨪400Hz)
FAN MOTOR
FLAME ROD
B1
R-Bk
More than 1200
pulse/min
ԛꢀ
DC6㨪40V
Y-Bk
DC11㨪13V
W-Bk
Y-earth
DC2㨪10V(pulse 20㨪400Hz)
More than DC1ǴA
C2
A4
At ignition
Ԝꢀ
ԝꢀ
HOT WATER
THERMISTOR
W-W
Measure Thermis-
tor side (small wire)
15 ̖͠11.4㨪14.0kǡꢀ
30 ̖͠ 6.4㨪 7.8kǡꢀ
45 ̖͠ 3.6㨪 4.5kǡꢀ
60 ̖͠ 2.2㨪 2.7kǡꢀ
105̖͠ 0.6㨪 0.8kǡꢀ
AIR INTAKE
THERMISTOR
A3
Y/Bk-Y
Measure Thermis-
tor side (small wire)
Ԟꢀ
15 ̖͠20.1㨪17.9kǡꢀ
30 ̖͠10.2㨪 8.9kǡꢀ
45 ̖͠ 5.5㨪 4.7kǡꢀ
60 ̖͠ 3.1㨪 2.6kǡꢀ
105̖͠ 0.7㨪 0.5kǡꢀ
THERMAL
FUSE
IGNITOR
C3
A5
G1
R-switch
ԟꢀ
Less than 1ǡꢀ
Gy-Gy
P-Bk
Ԡꢀ
ԡꢀ
AC200㨪240V
MAIN SOLE-
NOID VALVE
F1
DC200㨪240V
6.0㨪7.8Kǡꢀ
SOLENOID
VALVE 1
F2
F3
C1
B-Bk
Y-Bk
P-P
Ԣꢀ
ԣꢀ
Ԥꢀ
DC200㨪240V
7.8㨪10.8Kǡꢀ
DC200㨪240V
7.8㨪10.8Kǡꢀ
DC2㨪15V
SOLENOID
VALVE 2
MODULATING
VALVE
67㨪83ǡꢀ
TRANSFORMER VOLTAGES AND RESISTANCES
Connector
Wire Color
W-W
Normal Value
AC200㨪240V 11㨪20ǡꢀ
AC49㨪55V 1.3㨪1.7ǡꢀ
H
D
Or-Or
D
D
B-Br
Br-Y
AC12㨪14V 0.7㨪1.3ǡꢀ
AC195㨪216V 175㨪215ǡꢀ
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LETTER OF COMPLIANCE
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CE CERTIFICATE
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COMMISSIONING CHECK LIST
COLDꢀ
HOTꢀ
GASꢀ
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UK WARRANTY
As the purchaser of this high quality Rinnai Water Heater you are provided with the
following conditional warranty.
Heat Exchanger
All Other Parts
Parts
Labour
1 Year
Parts
Year
Labour
1 Year
1 Year
1 Year
Standard Use
16i
1 Year
1 Year
1 Year
Commercial Use
16i
Rinnai Infinity units used in Commercial Situations are only subject to a 1 year warranty
across the board. Commercial situations should be supplied by the Rinnai HD range.
No Rinnai warranty will cover damage/ faults arising from moving or storing the unit; im-
proper installation or gas supply; water contaminants beyond defined limits; environ-
mental factors; plumbing fittings, or other outside influences of which Rinnai is not re-
sponsible. Service calls for these issues will be chargeable. The unit must be serviced
annually to validate the warranty.
The warranty period begins on customer’s date of purchase.
Total Dissolved Total Hard-
Description
pH
Chlorides Magnesium Calcium
Sodium
Iron
Solids (TDS)
ness
Maximum Recom-
mended Levels
6.5 - 9.0
600 mg/litre
150 mg/litre 300 mg/litre 10 mg/litre 20 mg/litre 150 mg/litre 1 mg/litre
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SPECIFICATION
Model………………………………………………..…....…………......................Infinity 16i
Installation…………………………………………...………...……... Internal location only
Fuel…………………………………………………..….…………..…...Natural Gas or LPG *
Control………………………………………………….……………...…….….…..Modulating
Output (nominal)………………..………………………...…..……….………4 kW to 30 kW
Exhaust type…………………………………………...…………….....Forced Draught Flue
Ignition………………………………………………...…………….………………..Electronic
Burner……………………………………………………...…………………....Stainless steel
Weight…………………………………………………...……….……………..…..………15kg
Water flow rate ………………………………………..……………….…...2.4** to 20 L/min
Minimum operating water pressure…………………..……….………..…..……….1.0 Bar
Connections
Gas…………………………………………………………...….………………….…….1/2BSP
Water Inlet………………………………………….………...……………….…….……1/2BSP
Water outlet…………………………………….………...………………………….…..1/2BSP
Electrical Supply…………………………….…………..…………….….230V AC 50Hz 1ph
* Separate models available for Natural gas or LPG fuel.
** Minimum flow rate based on temperature setpoint and inlet conditions.
Rinnai are continually updating and improving products and reserve the right to
alter model specifications without prior notice.
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CONTACT
Rinnai UK LTD.
9 Christleton Court
Manor Park
Runcorn
Cheshire
WA7 1ST
Tel. 01928 531870
Fax.01928 531880
E-mail. [email protected]
Web.
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