Rinnai REU - 16 FUA - E 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.
2
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
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 competent 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 engineer. 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 engineer to show you the card. If you are still not satisfied call CORGI
on 0870 401 2300 and verify the engineers 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.
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
FEATURES AND BENEFITS
Congratulations on purchasing the Technologically Advanced, Temperature Controlled,
Rinnai Hot Water System.
x 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.
x 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.
x Rinnai Infinity internal units are powered flue appliances. This makes them
COMPACT, saving both floor and wall space.
x 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.
x 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.
x 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.
x 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
0
C will revert to 550C when power and/or priority is regained.
55
x Operating NOISE LEVEL IS VERY LOW.
x ERROR MESSAGES ARE DISPLAYED on the Temperature Controllers, assisting
with service.
x FROST PROTECTION device built in as standard.
5
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.
DO
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.
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 or HD50i at a maximum
temperature of 50
Do install a child proof tap cover
OR,
0
C.
x Consider child—resistant taps
or inexpensive tap covers, both
of which prevent a child’s hand
from turning on the tap.
x 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
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.
6
IMPORTANT INFORMATION
Always check water temperature before
use.
Refer to warning about hot water on
page 16 for important safety information.
The Infinity 16i controls the water tem-
perature 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.
Hot water may go cold without warning at
very low water flows (less than 3 l/min.)
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
Drain
Drain
Water
Keep flammable materials, trees, shrubs,
chemicals, etc. away from the flue outlet.
If the power is left on the
Gas
Automatic Frost Protection
will prevent the unit from
Freezing. Frost protection
is standard on all units.
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
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
75
C can be set on the dip switches.
When the remote is turned on the temperature will default to 40
0
C
0
C.
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
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
Indicates the temperature selected.
Error message
flashes in the event
of a fault.
Priority Indicator
Indicates that the
controller has com-
mand of the system
(glowing,) or that the
system is free to take
command of (off.)
Priority Button
Used to transfer con-
trol between tem-
perature controllers.
The controller with
priority has command
of the hot water de-
livery temperature.
Temperature
ON / OFF Button
Buttons
Used to switch hot
Used to select hot
water delivery
temperature.
water system on
and off.
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.
10
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 40
system on will have priority. The temperature setting
on the controller will light up.
Adjusting Temperature
0
C and the controller that turned the
Simply press the Hot Water Temperature Up or Down
arrow button until the desired temperature is displayed
on the digital display.
COOLER
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.
HOTTER
Caution: Always check water temperature before use.
Note:
0
With the hot water tap open a temperature of 50
selected. For safety reasons temperature ‘priority’ cannot be transferred
between controllers when a hot water tap is open.
11
C or higher can not be
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.
.
Using hot water.
Open the hot water tap. The appliance
will be activated and the IN USE indicator will be lit.
0
When temperatures 50
chosen the High Temp lamp will be lit.
Bathroom temperatures should be no more than 500C.
C and above are
12
COOLER
HOTTER
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.
Do Not Turn OFF
the Master
Controller
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)
less it will not alter. This is a safety feature.
Temperature priority can not be switched
to another controller when the water is
flowing through the water heater.
400C
Controller 1
in use
Controller 2
cannot take
priority
0
C or
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 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.
480C
14
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.
15
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
10
11
12
14
16
32
Not enough combustion air Check for physical blockages around
No Ignition / Gas supply Check gas valves, gas supply and
Flame failure / Earth Leakage Check gas valves and gas supply.
High flame safety device Check overheat circuit
Over temperature warning Modulating control valve problem or
Outgoing water temperature
sensor faulty
Inlet water filter needs to be cleaned.
air intake or exhaust. Check combus-
tion fan.
ignition unit.
Check flame rod.
Check earth wire lead.
Check remote control.
water flow control valve problem
Check Hot Water Thermistor and wire
34
52
61
71
Combustion Air temperature
sensor faulty
Gas modulating valve faulty Check gas modulating valve and pcb.
Combustion fan failure Check Combustion Fan
Micro-processor failure or Sole-
Check Air Intake Thermistor and wire
Check solenoids and pcb.
noid circuit failure
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.
Flame rod circuit error Check flame rod and pcb.
Regular maintenance should be performed by a competent person in accordance
with the local regulations at least once annually.
16
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