Rinnai REU-VR3237WG User manual

To Suit Water Heater Models:
INFINITY 32 REU-VR3237WG
INFINITY 26 REU-VR2626WG
INFINITY 26 Plus REU-VRM2630WD
INFINITY 26i REU-VR2632FFUG
INFINITY 20 REU-VR2024WG
INFINITY 16 REU-VR1620WG
INFINITY ENVIRO 32 REU-KM3237WD
INFINITY ENVIRO 26 REU-KM2635WD
V1500 REU-VR2426WB
V1200 REU-VR1620WB
HD250e REU-VRM3237WC
HD200e REU-VRM2632WC
HD200i REU-VRM2632FFUC
Please see the inside front cover of this manual for additional
Rinnai continuous flow water heater models covered by this manual.
Operation / Installation
Manual
How to use and install Rinnai continuous flow water heaters
This appliance shall be installed in accordance with:
• Manufacturer’s Installation Instructions
• Current AS/NZS 3000, AS/NZS 3500 & AS 5601
• Local Regulations and Municipal Building Codes
This appliance must be installed, serviced and removed by an Authorised Person.

Some additional Rinnai continuous flow water heater models not listed on the front
cover of this manual are also covered by this manual.
The following table lists these additional models and their equivalent.
When using this manual use the specifications of the equivalent model listed below.
Model not listed on the front cover Equivalent Model
REU-V3237WG REU-VR3237WG
REU-V2626WG REU-VR2626WG
REU-VM2630WD REU-VRM2630WD
REU-V2632FFUG REU-VR2632FFUG
REU-V2024WG REU-VR2024WG
REU-V1620WG REU-VR1620WG
REU-K2430WG REU-KR2430WG
REU-V2426WB REU-VR2426WB
REU-V1620WB REU-VR1620WB
REU-V2024WE REU-VR2024WG
REU-VM3237WC REU-VRM3237WC
REU-VM2630WC REU-VR2626WG
REU-VM2632FFUC REU-VRM2632FFUC
Other Rinnai continuous flow water heater models that are not listed above are
therefore not covered by this manual.
REU-V2632FFUG and REU-VM2632FFUC internal continuous flow water heaters use
an older (male) flue spigot design. Refer to the “Flue Installation Manual” issue 3 or
earlier for the flue installation details for these models.
NOTE
IMPORTANT
IMPORTANT

Rinnai Australia i Operation Manual
REGULATORY INFORMATION..................................................................................1
WARNING ABOUT HOT WATER...............................................................................1
FEATURES AND BENEFITS ......................................................................................2
IMPORTANT INFORMATION .....................................................................................3
OPERATION WITHOUT CONTROLLERS..................................................................5
GENERAL WATER CONTROL INFORMATION ........................................................6
UNIVERSAL WATER CONTROLLERS......................................................................7
ABOUT THE UNIVERSAL WATER CONTROLLER (MC-91Q)................................................................... 7
TURNING ON THE CONTROLLER............................................................................................................. 7
ADJUSTING TEMPERATURE..................................................................................................................... 7
HOW TO USE TWO OR MORE UNIVERSAL WATER CONTROLLERS ................................................... 8
TRANSFERRING PRIORITY....................................................................................................................... 8
ADJUSTING TEMPERATURE..................................................................................................................... 8
DELUXE BATHROOM WATER CONTROLLERS......................................................9
ABOUT THE DELUXE BATHROOM WATER CONTROLLER (BC-100V).................................................. 9
TURNING ON THE CONTROLLER.............................................................................................................9
SETTING THE SOUND OPTIONS ............................................................................................................ 10
SETTING THE CLOCK ..............................................................................................................................10
ADJUSTING TEMPERATURE................................................................................................................... 10
OPERATING THE SHOWER SAVER / BATH FILL FUNCTION ............................................................... 11
USING MULTIPLE WATER CONTROLLERS ........................................................................................... 12
COMBINING UNIVERSAL AND DELUXE WATER CONTROLLERS ....................................................... 12
DELUXE KITCHEN WATER CONTROLLERS.........................................................13
ABOUT THE DELUXE KITCHEN WATER CONTROLLER (MC-100V) ....................................................13
TURNING ON THE CONTROLLER........................................................................................................... 13
SETTING THE SOUND OPTIONS ............................................................................................................13
SETTING THE CLOCK .............................................................................................................................. 14
ADJUSTING TEMPERATURE................................................................................................................... 14
SMARTSTART® PRE-HEAT OPERATION..............................................................15
ABOUT THE SMARTSTART® PREHEAT SYSTEM.................................................................................15
TROUBLESHOOTING...............................................................................................16
INSTALLATION MANUAL ........................................................................................19
ACCESSORIES ........................................................................................................35
PRODUCT RECORDS .............................................................................................35
CONTACT INFORMATION ......................................................................................36
OPERATION MANUAL

Rinnai Australia ii Operation Manual

Rinnai Australia 1 Operation Manual
Your Rinnai Continuous Flow water heater has been certified by the Australian Gas Association.
The A.G.A. Certification Number is shown on the data plate.
This Appliance must be installedcorrectly by an authorised person. The installation of gas, water, and
electricity must conform to local regulations.
The installation must also comply with the instructions supplied by Rinnai.
All dimensions referred to in these instructions are in millimetres, unless otherwise specified.
Please keep this instruction booklet in a safe place for future reference.
Notice to Victorian Consumers
This appliance must be installed by a person licensed with the Plumbing Industry Commission.
Only a licensed person will have insurance protecting their workmanship.
So make sure you use a licensed person to install this appliance and ask for your Compliance
Certificate. For Further information contact the Plumbing Industry Commission on 1800 015 129.
Heated water can be dangerous, especially for young
children and the infirm.
Water temperatures above 50°C can cause severe burns
instantly and may even result in death.
Those most at risk are children, disabled, elderly and the
infirm.
Hot water at 65°C (a very common hot water temperature in
Australia) can severely burn a child in less than half a second.
At 50°C it takes five minutes.
ALWAYS......
Test the temperature of the water with your elbow before placing your child in the bath, also
carefully feel water before bathing or showering yourself.
Supervise children whenever they are in the bathroom.
Make sure that the hot water tap is turned off tightly.
CONSIDER.....
Installing child proof tap covers or child resistant taps (both approaches will prevent a small
hand being able to turn on the tap).
Setting your appliance at a maximum temperature of 50°C (Contact Rinnai Australia).
NEVER…..
Leave a toddler in the care of another child. They may not understand the need to have the
water temperature set at a safe level.
REGULATORY INFORMATION
WARNING ABOUT HOT WATER

Rinnai Australia 2 Operation Manual
FEATURES AND BENEFITS
Congratulations on purchasing the latest technology temperature controlled Rinnai continuous flow
water heating system.
•The Rinnai Continuous Flow water heater products NEVER RUN OUT of hot water. Whilst
electricity, water and gas supplies are connected, hot water is available whenever 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 limited to various values. This is particularly
useful when the hot water unit is installed where young children or the infirm may be using the hot
water.
•The Rinnai Continuous Flow water heater products are power flued appliances. This makes them
COMPACT, saving both floor and wall space.
•The temperature of hot water is CONSTANTLY MONITORED by a BUILT-IN SENSOR. If the
temperature of the hot water rises to more than 3°C above the selected temperature the burner is
turned OFF and only turned ON again when the temperature falls below the selected temperature.
•The burner lights automatically when the hot water tap is opened, and goes out 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 "Smartstart®" system when fitted can pre-heat the water in the pipework between the water
heater and the hot water outlets. This results in water savings and reduces waiting time for heated
water at the outlets.
•'Deluxe' or 'Universal' Water Controllers are available as an optional extra. Depending on the
models chosen, these offer the following features:
• Bath fill function (Deluxe Bathroom Control Only).
• Voice Prompting (Deluxe Control Only).
• Clock (Deluxe Control Only).
• Up to four water controllers can be fitted. See page 6 for details.
• Water controller cables are connected easily by the end user using a convenient quick connect
system.
•Operating NOISE LEVEL IS VERY LOW.
•ERROR MESSAGES ARE DISPLAYED on the Water Controllers and Status Monitor*, assisting
with service. *Status Monitor available on INFINITY 26 Plus (REU-VRM2630WD), HD250e (REU-
VRM3237WC), HD200e (REU-VRM2632WC) and HD200i (REU-VRM2632FFUC) models only.

Rinnai Australia 3 Operation Manual
IMPORTANT INFORMATION
The range of Rinnai continuous flow water heaters referred to in this manual are
incompatible with solar water heating systems. A dedicated range of solar
compatible continuous flow water heaters is available from Rinnai.
Always check water temperature carefully before
use. Refer to the WARNING ABOUT HOT WATER
on "page 1" of this manual for important safety
information.
At low water flows, the hot water unit may extinguish
without warning. Opening the tap further will restart
the appliance.
Do Not touch the unit cover or the flue outlet.
Do Not insert objects into the flue outlet.
On colder days steam may discharged from the flue
outlet. This condition is normal for high efficiency
appliances and does not indicate a fault.
Keep flammable materials, spray cans, fuel
containers, pool chemicals, trees, shrubs, etc. well
clear of the flue outlet.
Do Not spray water directly into the flue terminal.
If freezing conditions are expected, turn off water and
gas and drain all water from the appliance. If power
and the automatic frost protection are connected,
freezing will be prevented. (Anti-frost protection is
fitted as standard equipment on External units and is
available as an optional extra on Internal Units)
The delivered water temperature is controlled
automatically. The flow may vary depending on the
delivery temperature selected and the ambient water
temperature.
NOTE
OFF!
HOT!
Filter
Drain
Gas
Valve
GasColdHot
Turn Water Off
Turn Gas Off
Drain Water
43°C
55°C

Rinnai Australia 4 Operation Manual
IMPORTANT INFORMATION
To clean your water controller(s) use a soft
damp cloth with a mild detergent.
Do Not use solvents!
Whilst hot water outlets are open the set
temperature may be lowered. However they
cannot then be raised above 43°C. In addition
transfer of 'priority' between controllers is not
possible. These are safety features.
Depending on the weather conditions and the
length of the pipe between the hot water unit
and the outlet in use, there may be a variation
between the temperatures displayed at the
water controller(s) and the temperature of the
water at the outlet.
There is no need to turn the water controller(s)
off after use. However, if you prefer to turn the
water controller(s) off, selected temperatures
to a maximum of 50°C will be stored in the
system memory at alltimes whilst mains power
remains connected.
As a safety precaution, if a Kitchen Controller's
temperature is set above 50°C, transferring
and then returning 'priority' to the Kitchen
Controller will result in a default set
temperature of 50°C being selected. This is a
safety feature.
Do Not push the On/Off button on any
Controller when the ‘Red’ water heater ‘In Use’
indicator is illuminated as this will turn off the
water heater causing the water to go cold.
Someone maybe in the middle of having a
shower or filling a bath.
S
O
L
V
E
N
T
Max.
43°C
49°C
50°C
Kitchen Kitchen
Bathroom

Rinnai Australia 5 Operation Manual
OPERATION WITHOUT CONTROLLERS
Rinnai Continuous Flow water heater products do not use a pilot light.
When installed and operated without water controllers, the opening of any hot water tap will
automatically start the appliance.
Once water is flowing through the appliance the burner will be ignited by electronic ignition.
When the hot water tap is closed and water flowing through the appliance has stopped the burner
flame will extinguish.
The Rinnai Continuous Flow water heater range other than the Rinnai Heavy Duty
(HD) series are factory pre-set to a temperature limit of 50°C or 55°C. The HD series
are factory pre-set to a temperature limit of 65°C. Other limits, lower or higher, are
available on request for the entire Continuous Flow water heaters range.
Temperature controllers are available to allow precise digital temperature control.
Controllers can be fitted at any time after installation of the hot water unit.
Heated water can be dangerous, especially for young children and the infirm.
Water temperatures above 50°C can cause severe burns instantly and may even
result in death.
Those most at risk are children, disabled, elderly and the infirm.
Hot water at 65°C (a very common hot water temperature in Australia) can
severely burn a child in less than half a second. At 50°C it takes five minutes.
ALWAYS......
Test the temperature of the water with your elbow before placing your child in the
bath, also carefully feel water before bathing or showering yourself.
Supervise children whenever they are in the bathroom.
Make sure that the hot water tap is turned off tightly.
CONSIDER.....
Installing child proof tap covers or child resistant taps (both approaches will
prevent a small hand being able to turn on the tap).
Setting your appliance at a maximum temperature of 50°C (Contact Rinnai
Australia).
NEVER…..
Leave a toddler in the care of another child. They may not understand the need
to have the water temperature set at a safe level.
HOTHOT
COLDCOLD
ON!ON!
ON!ON!
HOTHOT
COLDCOLD
OFF!OFF!
OFF!OFF!
NOTE
CAUTION

Rinnai Australia 6 Operation Manual
GENERAL WATER CONTROL INFORMATION
Remote water controllers allow precise temperature control by the user. When used correctly, the hot
water unit will deliver the selected temperature, even when the water flow is varied, or more than one
tap is in use. Each water controller can be individually programmed, however the water heater can
only deliver one set temperature at any time. The available temperatures (°C) are as follows:
Kitchen Controller:
37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 48, 50, 55°C* ( 60, 65°C HD models only )
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
Whilst hot water outlets are open the set temperature may be lowered. However the set temperature
cannot then be raised above 43°C. In addition, transfer of 'priority' between water controllers is not
possible. These are safety features.
Suggested temperatures are:
Kitchen 50°C ~ 55°C* Shower 37°C ~ 43°C, Bath fill 39°C ~ 45°C
* Temperature may not be available on allinstallations. Rinnai water heaters can be programmed to deliver higher temperatures
via the kitchen water controller. Contact Rinnai for more details.
These temperatures are suggestions only. You may find higher or lower temperatures more
comfortable. Maintaining lower temperatures helps save energy. To obtain water temperatures lower
than 37°C simply add cold water.
Water controllers are an optional extra. 'Universal' and 'Deluxe' water controllers can be fitted.
Universal water controllers allow temperature selection only. Deluxe water controllers allow
temperature selection, shower saver / bath fill and have a clock function.
Water controllers allow the water temperature to be set from the various locations where they are
installed. The temperature selected will be available to all outlets.
Universal (MC-91Q) and Deluxe (MC/BC-100V) Water Controllers - available configurations:
All
Models
A maximum of 4 water controllers can be fitted. Any combination of both deluxe and
universal controllers can be used with the following provisions:
Only ONE MC-100V water controller can be installed.
Up to TWO BC-100V water controllers can be installed.
The FOURTH water controllers in any installation MUST BE a MC-91Q.