Rinnai REU-VR2632WD-E User manual

Installation and User Manual
REU-VR2632WD-E - Infinity 26e REU-VR2632FFUD-E - Infinity 26i
REU-VR2632WDHD-E - HD50e REU-VR2632FFUDHD-E - HD50i
REU-VRM3237W-E - Infinity 32e REU-VRM3237FFU-E - Infinity.32i
REU-VRM3237WHD-E - HD70e REU-VRM3237FFUHD-E - HD70i
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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The Rinnai Infinity range of water
heaters, when correctly installed, comply
with the requirements of the United
Kingdom Water Regulations / Byelaws
(Scotland). These Products can be found
listed in the Water Fittings and Materials
Directory.
The Rinnai Infinity water heaters are CE Marked as allowed by Technigas.
Infinity 26e - REU-VR2632WD-E
Infinity 26i - REU-VR2632FFUD-E
Infinity 32e - REU-VRM3237W-E
Infinity 32i - REU-VRM3237FFU-E
HD50e - REU-VR2632WDHD-E
HD50i - REU-VR2632FFUDHD-E
HD70e - REU-VRM3237WHD-E
HD70i - REU-VRM3237FFUHD-E
Certificate numbers: E0000/0000 - E0000/0000
ID number: 0000BU0000
Date of Issue: 00/00/2010
Last revision: 00/00/2010
Quality System Standard
ISO 9001 - 2000
The Design, Development, and Manufacture of Gas Water Heating Appliances done under Rinnai’s
Quality Management System is certified under the Quality Management System Standard ISO 9001.
Registration Number JQ0003D
Registered since: February 1994
Certified by JIA—QA Centre.

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CONTENTS……………………………………………………………………………..…………………3
USER INSTRUCTIONS..................................................................................................................4
FEATURES AND BENEFITS…………………………………………..……………..………….5
IMPORTANT INFORMATION…………………………………………………...……..………..6
OPERATION WITHOUT REMOTES…………………………………………………….……8
STATUS MONITOR.............................................................................................................8
TEMPERATURE CONTROLS…………………………………………………….…………..…9
ERROR MESSAGES…………………………………………………….……………………14
RESTARTING THE RINNAI WATER HEATER…………………………………………….15
UK CARING AND MAINTENANCE…...………………………………………………………16
INSTALLATION INSTRUCTIONS………………………………….……………………..…………17
UK INSTALLATION INSTRUCTIONS………………………………………………………….18
UNPACKING RINNAI WATER HEATER……………..…………………………..…………...19
OPERATION ..............…………………………………..……...……………………..………...19
MAIN COMPONENTS…………………………………………………………..……………..22
INSTALLATION INSTRUCTIONS…………………………………………………….………...23
UK INSTALLATION INSTRUCTIONS……………………………………………….………...25
FLUE REQUIREMENTS…………………………………………………………………………26
UK FLUE REQUIREMENTS…………………………………………………………………..29
TEMPERATURE CONTROLS………………………………………………………………...30
EZ CONNECT……………………………………………………………………………………..32
TESTING………………………………………………………………………………......…….33
GAS PRESSURE SETTING…………………………………………………………….....….34
DIP SWITCH SETTING…………………….……………………….…………………………...36
DIMENSIONS………………………...................................................………………………..38
TECHNICAL DETAILS..………………………………………………............………………...42
FLOW CHART…….…………………………………………………………......………..……44
WIRING DIAGRAM…….…………………………………………………………………………45
DIAGNOSTIC POINTS……………………………….……………………………………….....47
WATER FLOW CHARACTERISTICS.................................................................................48
CE CERTIFICATE………………………………………………………….……………………..49
COMMISSIONING CHECKLIST………………..……………………………………………….53
UK WARRANTY…………………………..…………………………………………………….54
CONTACT...........................................................................................................................56
HEATER DETAILS..............................................................................................................56
CONTENTS

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USER 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 17.
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 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 CORGI on 0870 401 2300 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.
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

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Congratulations on purchasing the technologically advanced, temperature controlled, Rinnai Hot Water
System.
• Rinnai water heaters 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 dip switches on the PCB or with a localised
controller. For further information, please contact Rinnai.
• Rinnai Infinity water heaters 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 3°C above the selected temperature 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 Rinnai Infinity 32 litres models water heaters have a built in Status Monitor on the front of the unit
to display error codes and run condition.
• Up to four external temperature controllers can be mounted remotely from the heater. One Standard
control is supplied with all appliances (except for HD range). The remote offers the following
additional features:
Localised temperature setting
Diagnostic information
Error Codes
• ‘Deluxe’ Temperature Controllers are an optional extra. These provide functions including Bath Fill,
Voice Prompt, and Clock Setting.
• Temperatures selected at the controllers are retained in the SYSTEM MEMORY.
• Operating NOISE LEVEL IS VERY LOW.
• ERROR MESSAGES ARE DISPLAYED on the Temperature Controllers and Status Monitor,
assisting with service.
• 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 Water
Heater at a maximum temperature of 50°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 wa-
ter.
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.
• Consider child-resistant taps or
inexpensive tap covers, both of
which prevent a child’s hand from
turning on the tap.
• Consider reducing the tempera-
ture of the water supplied to the
hot tap to 50°C.
This approach can be extremely
valuable because it requires a one
time action for a long term reduc-
tion in risks of scalds.
This type of automatic protection is
important during times when a par-
ent or carer has been
distracted.
DO
DO
NOT

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IMPORTANT INFORMATION
Always check water temperature before use.
Refer to warning about hot water on page 6 for
important safety information.
Hot water may go cold without warning at very
low water flows (less than 3 l/min).
The delivered water temperature is controlled
automatically. 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.
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 /
terminal.
Do not spray water into flue terminal
Do not touch the flue outlet. Do not insert objects
into the flue outlet / terminal.
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!
43°C 55°C
HOT!
Filter
Drain
Gas
Valve
GasColdHot
Turn Water Off
Turn Gas Off
Drain Water

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Rinnai Infinity products have no pilot light and operate automatically as soon as water flow is sensed.
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 range of water heaters are factory preset to a temperature of 55°C
(HD range to 65°C). Other limits, lower or higher, are available on request.
Temperature controllers are available to allow precise digital temperature control.
Controllers can be installed at any time after installation of the hot water unit.
Excessively hot water is dangerous. Rinnai water heaters allow you to control the
temperature of your hot water to a safe level.
Water temperatures above 50°C can cause severe burn s instantly, such scalding
may even result in death. Those most at risk are children, disabled, elderly and
the infirm. Hot water at 65°C (a very common water temperature in the UK) can
severely burn a child in less than half a second. At 50°C it takes five minutes.
Consider using Thermostatic Mixing Valves on the Hot Water Outlets.
OPERATION WITHOUT REMOTES
The Rinnai 32 litres water heaters have a built in status monitor on the front.
The status monitor has three conditions:
1. The water heater is off (no water flowing): the monitor is blank.
2. The water heater is on (heating water): the monitor displays the set temperature.
3. The water heater should be on, but is not (water is flowing, heater is not on): the
monitor will display a flashing error code.
STATUS MONITOR
CAUTION
NOTE
HOTHOT
COLDCOLD
OFF!OFF!
OFF!OFF! HOTHOT
COLDCOLD
ON!ON!
ON!ON!
STATUS MONITOR

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TEMPERATURE CONTROLS
The purpose of a Temperature Controller is to enable the user to have localised control over the hot
water supply.
Used correctly, the hot water unit 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 four universal can be fitted with Rinnai water heaters. Universal Controllers allow temperature
selection only and one comes as standard with the water heater.
Deluxe Temperature Controllers are available as an optional extra.
These controllers have temperature selection, bath fill, voice prompt, and time clock functions.
When more than one universal Controller is used one may be set as the Master Controller to allow
temperatures above 50°C.
(ask Rinnai for more information)
Various water temperatures (°C) can be selected as follows:
Universal Controller:
37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 48, 50°C
Master universal Controller:
37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 48, 50,
55°C (60, 65°C HD)
Deluxe Bathroom Controller:
Hot Water Delivery: 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 48, 50°C
Bath fill Delivery: 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48°C
Deluxe Kitchen Controller:
37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 48, 50, 55°C (60, 65°C HD)
If a temperature of 43°C or higher is selected on a ny controller and this temperature is then decreased
to below 43°C and increased again whilst the water is running, the maximum selectable temperature will
be 43°C. This provides additional safety for the user.
Suggested temperatures are:
Kitchen 50°C - 65°C**; Shower 39°C - 43°C; Bath fil l 39°C - 45°C
** This temperature may not be available on all installations.
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 37°C simply add cold water.
When multiple temperature controllers are used they allow the temperature to be set from various
locations by pushing the transfer button which gives that controller priority over the system. The
temperature selected by the controller with priority will be available to all outlets.

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TEMPERATURE CONTROLS
Safety features
Whilst the hot water tap is open, the following
safety features apply:
• Temperature selection cannot be transferred.
• The temperature setpoint on the controller
with priority can always be lowered, but the
setpoint can only be raised to 43°C.
• Other controllers are unable to take priority or
change the delivery temperature of the water.
• If off, the controller cannot be turned on.
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 red 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).
Remote temperature controllers provide control over the water temperature. Rinnai water heaters can
be operated with 1, 2, 3, 4 or no temperature controllers.
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. This can be done for each Temperature Controller. To return to original
settings, repeat this step.
NOTE
NOTE