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.

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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
CONTENTS

4
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

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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
550C will revert to 550C when power and/or priority is regained.
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.
FEATURES AND BENEFITS

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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 or HD50i at a maximum
temperature of 500C.
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
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 500C.
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

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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 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.
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

9
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.

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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 tem-
perature 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 com-
mand 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.