Rinnai REU-VRM1120WD-E Infinity 11e User manual

Installation and User Manual
REU-VRM1120WD-E - Infinity 11e
REU-VRM1720WD-E - Infinity 17e
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
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 11e - REU-VRM1120WD-E
Infinity 14e - REU-VRM1420WD-E
Infinity 17e - REU-VRM1720WD-E
Infinity 20e - REU-VRM2024WD-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.

3
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…………………………………………………………..……………..21
INSTALLATION INSTRUCTIONS…………………………………………………….………...23
UK INSTALLATION INSTRUCTIONS……………………………………………….………...25
UK FLUE REQUIREMENTS…………………………………………………………………..26
TEMPERATURE CONTROLS………………………………………………………………...27
TESTING………………………………………………………………………………......…….29
GAS PRESSURE SETTING…………………………………………………………….....….30
DIP SWITCH SETTING…………………….……………………….…………………………...32
DIMENSIONS………………………...................................................………………………..34
TECHNICAL DETAILS..………………………………………………............………………...35
FLOW CHART…….…………………………………………………………......………..……36
WIRING DIAGRAM…….…………………………………………………………………………37
DIAGNOSTIC POINTS……………………………….……………………………………….....38
WATER FLOW CHARACTERISTICS.................................................................................39
LETTER OF COMPLIANCE……………………..………………………………………....…...40
CE CERTIFICATE………………………………………………………….……………………..41
COMMISSIONING CHECKLIST………………..……………………………………………….42
UK WARRANTY…………………………..…………………………………………………….43
CONTACT...........................................................................................................................45
HEATER DETAILS..............................................................................................................45
CONTENTS

4
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 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.
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

5
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 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. This offers the following additional features:
Localised temperature setting
Diagnostic information
Error Codes
Clock
Bath fill
„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

6
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

7
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!
HOT!
Filter
Drain
Gas
Valve
GasColdHot
Turn Water Off
Turn Gas Off
Drain Water

8
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
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 burns 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 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!
STATUS MONITOR

9
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 3 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, 60, 65, 75°C
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, 60, 65, 75°C
If a temperature of 43°C or higher is selected on any 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 fill 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.

10
TEMPERATURE CONTROLS
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.
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).
NOTE
NOTE

11
TEMPERATURE CONTROLS
Using the Temperature Controllers
Press the ON/OFF button
o n a t e m p e r a t u r e
controller after making
sure that water is not
flowing.
The system will become
active, the temperature
will default to 40°C 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
T e m p e r a t u r e
Up or Down
arrow button
until the desired
temperature is
displayed on
t h e d i g i t a l
display.
Using Hot Water
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 on the temperature controller.
To turn off your hot water system
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.
Using High Temperature Display Controllers
You will need to program the Master controller if you want to display and use
temperatures over 50°C. Programming only needs to be done on Master
universal controller; other universal controllers will not allow this.
Deluxe Kitchen controllers are supplied already programmed to allow high
temperatures.
STEP 1: On the Master controller only press and hold the Transfer and ON/
OFF buttons simultaneously (see Fig. 1) until a “beep” is heard (approx. 5
seconds).
STEP 2: When the Primary controller is switched on it should be possible to select temperatures higher
than 50ºC. If not repeat STEP 1.
If the master controller is replaced, repeat STEP 1 above
for the new controller.
Fig. 1
NOTE
COOLER
HOTTER

12
TEMPERATURE CONTROLS
Using 2 or more universal 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.
Using hot water.
Ensure the system is switched On by verifying the temperature display is lit.
Ensure the local controller has priority by verifying the Transfer LED
indicator is lit. If it is not then press the Transfer button once. This gives the
local controller priority of temperature over the system.
Select the desired temperature using the Hot water temp. buttons. The
selected temperature will be displayed on all controller displays. This is the
water temperature which will be supplied from the heater.
Bathroom temperatures should be no
more than 50°C.
Open the hot water tap. The appliance will
be activated and the In Use indicator will
be lit.
Using 4 Universal Temperature Controllers.
You will need to activate the fourth controller.
STEP 1: On the Master controller press and hold the Transfer and
ON/OFF buttons simultaneously (see Fig. 2) until a “beep” is heard
(approx. 5 seconds).
STEP 2: Check that the display on all Four controllers is lit and
displaying a temperature when switched on. If any ONE of the
controllers displays two dashes (see Fig. 1) in the display repeat
STEP 1.
If the master controller is replaced, repeat STEP 1
above for the new controller.
NOTE
Fig. 1
Fig. 2

13
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 cannot be switched to
another controller when the water is flowing
through the water heater.
Controller 1 Controller 2
in use cannot take
priority
If a temperature over 50°C 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 50ºC.
If the set point is 50°C or less it will
not alter.
This is a safety feature.
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.
TEMPERATURE CONTROLS
X
Kitchen Kitchen
Bathroom
S
O
L
V
E
N
T

14
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 (and on the Status Monitor) 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.
* 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.
*** The display will alternate between temperature setting and LC code. The controller will continue to
beep. The LC code will reset if power is turned Off and then On.
Code
Displayed Fault Remedy
- Noticeable reduction in water flow Inlet water filter needs to be cleaned.
03
Power interruption during operation
(water will not flow when power
returned)
Turn off all hot water taps and circulating
pumps.
Press „On/Off‟ twice
10 Not enough combustion air Check for physical blockages around air intake
or exhaust. Check combustion fan.
11 No Ignition / Gas supply Check gas valves, gas supply
and sparker 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 Service Call
16 Over temperature warning Service Call
32 Outgoing water temperature sensor
faulty Service Call
33 Heat exchanger outlet sensor faulty Service Call
34 Combustion Air Temperature Sensor
faulty Service Call
52 Gas modulating valve faulty Service Call
61 Combustion fan failure Service Call
65 Water flow control faulty
(does not stop flow properly) Service Call
71 Micro-processor failure Service Call
72 Flame rod circuit error Service Call
LC (00)*** Scale build-up in heat exchanger Service Call

15
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.
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 timer to prevent the consumption of energy while
the building is not used. The timer should bring the system back on at least one hour before it is to be
used.
Without temperature controller fitted.
The heater should automatically reset and provide water at the temperature set by the internal limit
switches.
Fault Remedy
Heater does not attempt
to start at all.
Check the power is on at the heater.
Check the cold water valve supplying the heater is open.
Heater starts then shuts
down immediately.
Check the power is on. Open the hot water tap fully.
Check the gas valve at the heater and at the gas meter is fully open.
Heater starts then water
goes cold. Check the power is on. Open your hot water tap further or try another hot outlet.
RESTARTING THE RINNAI WATER HEATER
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, 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.

16
UK CARING AND MAINTENANCE
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. For more
detailed instructions on maintenance 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.
Filter
The water heater has a filter on the cold water inlet connection. This filter will need to be cleaned
occasionally. How often will be determined by the local water conditions; contact Rinnai or ask your
installer for information.
Isolate the cold water inlet and hot water outlet with the valves near the heater. Release the pressure in
the heater by unscrewing the drain valve. Then remove the filter, clean it and replace it.

17
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.
This can void the warranty.
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 ap-
pliance.
If you are unsure of any point contact Rinnai or your supplier.
INSTALLATION INSTRUCTIONS

18
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 Gas
Safe registered for this type of appliance in this type of location who have a current ACS cer-
tificate.
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. Compe-
tence 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 and G
Such other specifications and regulations that may supersede or complement the above documents.
It is the installer‟s responsibility to ensure that the unit has been installed to all current requirements.
Please be sure that you are fully aware of your obligations and responsibilities under these
regulations.
In case of defect parts only use genuine Rinnai components for replacement.
UK INSTALLATION INSTRUCTIONS

19
UNPACKING RINNAI WATER HEATER
After unpacking the appliance check for
damage, if the heater is damaged contact
your supplier immediately. Do not install a
damaged appliance before checking with
your supplier.
A heater accessories pack is inside the
carton. One remote control is supplied with
the Infinity range of water heaters. Remote
controllers are not supplied with the Rinnai
HD range of heaters because they are
commercial units. If you require controllers
in commercial situations they are compatible
with the HD range and available from Rinnai
UK or your supplier.
Check that the appliance supplied is the
correct gas type and pressure for the
installation. Refer to the data plate located
on the left-hand side of the appliance.
Remove the heater and the accessories
from the carton, and check that all the parts
are included. The remote control cable is
provided with spade connectors.
Ignition
Press ON/OFF Button of Remote Controller to turn on unit and the remote controller 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 compares the measured
temperature to the temperature setpoint. If required it begins 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 Control
Once the Flame Rod proves ignition the Infinity modulates by controlling the gas rate, combustion air,
and water flow to precisely heat the water. This control is done by measuring the outgoing water
temperature with a Thermistor.
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 Valve and Change-over Solenoid Valves and the Burner
extinguishes.
OPERATION

20
OPERATION
Infinity REU-VRM1120WD -
REU-VRM1720WD -