Rinnai REU-16FUA-E Infinity 16 i Installation And User Manual
Installation and User Manual
REU - 16 FUA - E
“Infinity 16 i”
“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.
CONTENTS
CONTENTS 3
USERS 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 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 CHECK LIST 48
COMMISSIONING SHEET 49
SERVICE RECORD 50
UK WARRANTY 51
PRODUCT FICHE 52
CONTACT 53
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 cover of the unit. To remove the front cover of the unit
you must be certified competent to do so. Information for the Installer is given on page 19.
All work done on this appliance must be done by a qualified gas engineer. A qualified gas engineer must
carry an up to date GAS SAFE Registered Gas Installer photo identification card while working on gas
appliances. If you are unsure do not be afraid to ask the engineer to show you the card. If you are still not
satisfied call GAS SAFE on 0800 408 5500 and verify the engineer’s name with their database. 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. This installation manual should be kept
with the appliance for maintenance and user information.
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.
Interference with a sealed component is not permitted. In case of defect parts only use genuine Rinnai
components for replacement.
Conversion to other gas types should only be carried out by a qualified installer or a gas distributor according to
the practice in the country where the unit is installed.
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.
ATTENTION: air surrounding the water heater, venting and vent termination(s) is used for combustion and must
be free of any compounds that cause corrosion of internal components. These include corrosive compounds that
are found in aerosol sprays, detergents, bleaches, cleaning solvents, oil based paints/ varnishes, and
refrigerants. Therefore Rinnai recommends outdoor models be used for these locations where possible.
The water heater, venting and vent termination(s) should not be installed in any areas where the air may contain
these corrosive compounds. If it is necessary for a water heater to be located in areas which may contain
corrosive compounds, Rinnai strongly recommends the following:
Indoor/Internal Water Heaters:
* DO NOT install in areas where contaminated air is present
* Consider before installation where air has the ability to travel within the building
* Where possible, install the water heater in a sealed closet so that it is free of contaminated indoor air
* Chemicals that are corrosive in nature should not be stored or used near the water heater
Outdoor/External Water Heaters and Vent Terminations of Indoor/Internal Water Heaters:
* Install as far away as possible from exhaust vent hoods
* Install as far away as possible from air inlet vents. Corrosive fumes may be released through these vents when
air is not being brought in through them.
* Chemicals that are corrosive in nature should not be stored or used near the water heater or vent termination.
Damage and repair due to corrosive compounds in the air is not covered by warranty.
The exhaust outlet may change colour over time due to the condensate in the exhaust gases. This discoloration
does not damage the part or its form, fit or function.
Benchmark places responsibilities on both manufacturers and installers. The
purpose is to ensure that customers are provided with the correct equipment
for their needs, that it is installed, commissioned and serviced in accordance
with the manufacturer’s instructions by competent persons and that it meets
the requirements of the appropriate Building Regulations. The Benchmark
Checklist can be used to demonstrate compliance with Building Regulations
and should be provided to the customer for future reference. Installers are
required to carry out installation, commissioning and servicing work in accordance with the Benchmark Code of
Practice which is available from the Heating and Hotwater Industry Council who manage and promote the
Scheme. Visit www.centralheating.co.uk for more information.
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: National Grid 0800 111 999
Congratulations on purchasing the Technologically Advanced, Temperature Controlled,
Rinnai Hot Water System.
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.
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.
Rinnai Infinity internal units are powered flue appliances. This makes them
COMPACT, saving both floor and wall space.
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.
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.
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.
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.
Operating NOISE LEVEL IS VERY LOW.
ERROR MESSAGES ARE DISPLAYED on the Temperature Controllers, assisting
with service.
FROST PROTECTION device built in as standard.
FEATURES AND BENEFITS
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.
Do stay with children
whenever they are in the bathroom.
Do take them out of the bathroom if
you need to answer the phone or
door.
Do test the temperature of the water
with your elbow before placing your
child in the bath.
Do make sure that the tap is turned
off tightly.
Do consider setting your Rinnai
Infinity at a maximum temperature of
50
0
C.
Do install a child proof tap cover
OR,
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.
IMPORTANT INFORMATION
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
Consider child—resistant taps
or inexpensive tap covers, both
of which prevent a child’s hand
from turning on the tap.
Consider reducing the
temperature of the water
supplied to the hot tap to 50
0
C.
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
distracted.
DO
NOT
IMPORTANT INFORMATION
Always check water temperature before
use.
Refer to warning about hot water on
page 16 for important safety information.
Hot water may go cold without warning at
very low water flows (less than 3 l/min.)
The Infinity 16i controls the water temperature automatically. For high temperatures 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.
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.
OFF
If freezing temperatures
are expected, turn off the
water and gas, and drain
the water heater.
1. Water Off
2. Gas Off
3. Drain Water
If the power is left on the
Automatic Frost Protection
will prevent the unit from
Freezing. Frost protection
is standard on all units.
Drain
Gas
Drain
Water
ć
ć
Rinnai Infinity products have no pilot light and operate automatically as soon as a hot
water tap is opened.
The burner ignites with electronic ignition and the flame extinguishes as soon as water
flowing through the appliance stops.
Turn On by opening the hot water tap
The Rinnai Infinity 16i water heater has a built in controller on the front cover for
adjusting the temperature. Additional remote controllers are available to locate near the
points of use, and give precise digital temperature control.
Controllers can be easily added at any time after installation.
OTE
OPERATION WITHOUT REMOTES
HOT COLD
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, 60
0
C
75
0
C 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.
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.
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.
TEMPERATURE CONTROLS - OPERATING
Digital Monitor
Indicates the temperature selected.
Error message
flashes in the event
of a fault.
Priority Button
Used to transfer con-
trol between tem-
perature controllers.
The controller with
priority has command
of the hot water de-
livery temperature.
Priority Indicator
Indicates that the
controller has command of the system
(glowing,) or that the
system is free to take
command of (off.)
ON / OFF Button
Used to switch hot
water system on
and off.
Temperature
Buttons
Used to select hot
water delivery
temperature.
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.
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.
Note:
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.
COOLER
HOTTER
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.
TEMPERATURE CONTROLS - OPERATING
Open the hot water tap. The appliance
will be activated and the IN USE indicator 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.
Using hot water.
COOLER
HOTTER
Note
To turn off your hot water system.
Additional safety features.
During normal operation the system is left on.
To turn the system off simply press the ON/OFF
button on any temperature controller (where
fitted). This will shut the water heater down
completely including the temperature controller
digital display.
The Digital Monitor will go out.
If hot water taps are opened when the Rinnai
Infinity is off, cold water will flow from the taps.
If the system is to be left off over the winter be
sure to drain it down if there is a possibility of
freezing temperatures.
Whilst the hot water tap is open, the following
safety features apply:
Temperature selection cannot be transferred.
If a temperature of 500C or higher selected,
and the temperature is decreased to below
500C, and then raised again the maximum
available temperature will be 500C.
Other controllers are unable to change the
delivery temperature of the water.
The temperature of the outgoing water is constantly monitored by a built in
sensor. If the temperature of the outgoing hot water rises to more than 3ºC
above the selected temperature shown on the digital display, or the preset
limit if controllers are not fitted, the burner will automatically go out. The
amber operation indicator will also go out. The burner will ignite again once
the outgoing hot water temperature falls to that shown on the digital display
(or the pre-set limit of the Rinnai Infinity heater).
TEMPERATURE CONTROLS - OPERATING
ON/OFF
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.
Do Not Turn OFF
the Master
Controller
Temperature priority can not be switched
to another controller when the water is
flowing through the water heater.
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 displayed at the controller and the temperature at the tap.
Do not clean the control with
solvents or detergents. Use only a soft
damp cloth.
If a temperature 500C or higher has been selected on a controller and priority of temperature 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)
0
C or
less it will not alter. This is a safety feature.
First Another First
Controller Controller Controller
TEMPERATURE CONTROLS - INFORMATION
Controller 1
in use
Controller 2
cannot take
priority
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ć
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.
The inlet pipe has a water filter which needs to be checked occasionally. This can be
removed by isolating the water, and unscrewing the filter. The plug must be removed
first, followed by the filter. The filter is attached to the plug with a bayonet fitting.
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.
* 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.
Code
Displayed
ydemeR tluaF
- Noticeable reduction in water
flow
Inlet water filter needs to be cleaned.
10
Not enough combustion air Check for physical blockages around
air intake or exhaust. Check combus-
tion fan.
11
No Ignition / Gas supply Check gas valves, gas supply and
ignition unit.
12
Flame failure / Earth Leakage Check gas valves and gas supply.
Check flame rod.
Check earth wire lead.
Check remote control.
14
High flame safety device Check overheat circuit
16
Over temperature warning Modulating control valve problem or
water flow control valve problem
32
Outgoing water temperature
sensor faulty
Check Hot Water Thermistor and wire
34
Combustion Air temperature
sensor faulty
Check Air Intake Thermistor and wire
61
Combustion fan failure Check Combustion Fan
71
Micro-processor failure or Sole-
noid circuit failure
Check solenoids and pcb.
72
Flame rod circuit error Check flame rod and pcb.
52
Gas modulating valve faulty Check gas modulating valve and pcb.
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