Rinnai REU-1110FFU-E, REU-1110FFU(F)-E, REU-1412FFU-E, REU-1412FFU(F)-E Installation And User Manual
Installation
and User Manual
Models:
REU-1110FFU-E
Continuum 11i
REU-1110FFU(F)-E
Continuum 11i-fp
REU-1412FFU-E
Continuum 14i
REU-1412FFU(F)-E
Continuum 14i-fp
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 water heaters are CE Marked as allowed by Technigas.
REU-1412FFU-E - Continuum 14i
REU-1412FFU(F)-E - Continuum 14i-fp
REU-1110FFU-E - Continuum 11i
REU-1110FFU(F)-E - Continuum 11i-fp
Certificate number: E0940/5399 - rev. 5
ID number: 0461BQ0836
Date of Issue: 23/12/2005
Last revision: 02/02/2012
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
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.
3
CONTENTS 3
USER INSTRUCTIONS 4
FEATURES AND BENEFITS 5
IMPORTANT INFORMATION 6
OPERATION 8
UK CARING FOR THE INFINITY 11
ERROR MESSAGES 12
INSTALLATION INSTRUCTIONS 14
UK INSTALLATION INSTRUCTIONS 15
UNPACKING RINNAI WATER HEATER 15
OPERATION PRINCIPLE 16
MAIN COMPONENTS 17
INSTALLATION INSTRUCTIONS 19
FLUE REQUIREMENTS 22
TESTING 25
GAS PRESSURE SETTING 26
DIP SWITCH SETTING 28
DIMENSIONS 29
TECHNICAL DETAILS 30
PRODUCT FICHE 31
FLOW CHART 32
WIRING DIAGRAM 33
DIAGNOSTIC POINTS 34
WATER FLOW CHARACTERISTICS 35
LETTER OF COMPLIANCE 36
CE CERTIFICATE 37
COMMISSIONING CHECKLIST 38
COMMISSIONING SHEET 39
SERVICE RECORD 40
DISMANTLING FOR SERVICE 41
UK WARRANTY 42
CONTACT 44
CONTENTS
4
USER INSTRUCTIONS
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 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 from page 14.
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.
ATTENTION: air surrounding the water heater, venting and vent termination(s) is used for combustion and must
be free of any compounds that cause corrosion of internal components. These include corrosive compounds that
are found in aerosol sprays, detergents, bleaches, cleaning solvents, oil based paints/ varnishes, and
refrigerants. Therefore Rinnai recommends outdoor models be used for these locations where possible.
The water heater, venting and vent termination(s) should not be installed in any areas where the air may contain
these corrosive compounds. If it is necessary for a water heater to be located in areas which may contain
corrosive compounds, Rinnai strongly recommends the following:
Indoor/Internal Water Heaters:
* DO NOT install in areas where contaminated air is present
* Consider before installation where air has the ability to travel within the building
* Where possible, install the water heater in a sealed closet so that it is free of contaminated indoor air
* Chemicals that are corrosive in nature should not be stored or used near the water heater
Outdoor/External Water Heaters and Vent Terminations of Indoor/Internal Water Heaters:
* Install as far away as possible from exhaust vent hoods
* Install as far away as possible from air inlet vents. Corrosive fumes may be released through these vents when
air is not being brought in through them.
* Chemicals that are corrosive in nature should not be stored or used near the water heater or vent termination.
Damage and repair due to corrosive compounds in the air is not covered by warranty.
The exhaust outlet may change colour over time due to the condensate in the exhaust gases. This discoloration
does not damage the part or its form, fit or function.
Benchmark places responsibilities on both manufacturers and installers. The
purpose is to ensure that customers are provided with the correct equipment
for their needs, that it is installed, commissioned and serviced in accordance
with the manufacturer’s instructions by competent persons and that it meets
the requirements of the appropriate Building Regulations. The Benchmark
Checklist can be used to demonstrate compliance with Building Regulations
and should be provided to the customer for future reference.
Installers are required to carry out installation, commissioning and servicing work in accordance with the
Benchmark Code of Practice which is available from the Heating and Hotwater Industry Council who manage and
promote the Scheme. Visit www.centralheating.co.uk for more information.
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.
The Rinnai REU-1412FFU-E, REU-1412FFU(F)-E, REU-1110FFU-E and REU-
1110FFU(F)-E 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 control
pad on the front of the unit. For further information, please contact Rinnai.
Rinnai Continuum internal units 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.
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 REU-1412FFU-E, REU-1412FFU(F)-E, REU-1110FFU-E and REU-1110FFU(F)-E
have a display on the front of the unit for easy control of temperature. This offers the
following additional features:
Diagnostic message.
Error Codes.
Error messages are displayed on the front panel.
Frost protection device built in as a standard on REU-1412FFU(F)-E (Continuum 14i-fp)
and REU-1110FFU(F)-E (Continuum 11i-fp) models. On model REU-1412FFU-E
(Continuum 14i) and model REU-1110FFU-E (Continuum 11i) anti-frost protection is
not available.
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.
Water temperature over 50°C 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 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
Continuum 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
DO
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 reduction in risks of scalds.
This type of automatic protection is
important during times when a parent or carer has been distracted.
DO
NOT
7
IMPORTANT INFORMATION
Always check the temperature of the water
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.
The appliance controls the water temperature automatically. The water flow may
vary with the temperature of the incoming
water supply. In case the incoming water
temperature is low, the water volume at
taps reduces. In case it is high, the water
volume may be large.
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 only on
Continuum 11i-fp and Continuum 14i-fp
units.
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
Drain
Gas
Drain
Water
8
OPERATION
9
CONTROL PANEL
The Rinnai Continuum 11i (11i-fp) and Continuum 14i (14i-fp) water heaters have a
frontal pad on the front cover for adjusting the outgoing water temperature. The purpose of
the frontal pad is to enable the user to have a complete control over the hot water supply.
Used correctly, the appliances will supply hot water at the temperature selected, even when
the water flow is varied, or when more than one tap is used.
16 different temperature are available through selection on frontal pad:
Suggested temperatures are: Kitchen 45°C - 48°C; Bathroom 39°C - 43°C
These temperatures are suggested starting points for selection.
Maintaining lower temperatures helps to save energy.
To obtain water temperatures lower than 35°C simply add cold water.
The temperature selected will be available to all outlets.
OPERATION
Normal use
Shower / Bath
Saftey range of temperatures
10
OPERATION
Using the water heater.
Press the ON/OFF button on a temperature
controller. The system will become active, the
temperature will default to 40°C.
The temperature setting on the panel will light up.
Adjusting temperature.
Simply press the hot water temperature Up or
Down arrow button until the desired temperature is
displayed on the digital display.
Operate the water heater.
To operate the water 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.
Turning the hot water tap off will cause the heater
to stop heating water. The burner and the amber
operation indicator will automatically go out.
During normal operation the system is left on.
Switch off your hot water system.
To turn the system off simply press the ON/OFF
button. This will shut the water heater down. The
digital monitor will go out.
If hot water taps are opened when the water heater
is off, cold water will flow from the taps.
Note 1: depending on the weather conditions
and the length of the pipe between the water
heater and the tap in use, there may be a
variation between the temperature displayed at
the controller and the temperature at the tap.
Note 2: With the hot water tap open a
temperature of 48°C or higher can not
be selected.
Note 3: 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 3°C
above the selected temperature shown on the display, the burner will
automatically go out. The amber operation indicator will also go out. The burner
will ignite again once the outgoing hot water temperature falls to that shown on
the display.
Caution: Always check water temperature before use.
Increase
Decrease
11
UK 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.
Servicing Water Heaters
Isolate electrics and valve of hot, cold, and gas to unit.
Check the water filter and strainer to be sure there are no blockages.
Remove the combustion fan and clean the impeller.
Check the burner for wear or water damage. Vacuum out any debris. Wipe out
chamber.
Check the heat exchanger for soot or hot spots that could be caused by poor
combustion.
Clean carbon build up from ionisation and ignition probes.
Check flue terminal for blockages or potential blockages, check that flue is in good
condition.
Check all electrical connections are reconnected
The gas pressures should then be re-set (the procedure is detailed in the manual).
Verify temperature control by checking temperature at outlet, bear in mind that there
will be pipework losses.
Check all gas joints inside the unit with an electronic gas detection device when
starting unit.
Leak check all joints back to the service valve (commercial installations) or tightness
test the installation for domestic installations.
CARE
When the appliance casing, operation panel, and control surfaces become dirty gently
wipe them clean with a soft, damp cloth. Do not use detergents on these parts.
The inlet pipe has a water filter which needs to be checked occasionally. This can be
removed by isolating the water, and unscrewing the filter. The plug must be removed
first, followed by the filter. The filter is attached to the plug with a bayonet fitting.
12
ERROR MESSAGES
The water heater has the ability to check their own operation continuously. If a fault occurs,
an error code will flash on the digital display. 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.
* 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.
Regular maintenance should be performed by a competent person in accordance with
the local regulations at least once annually.
Code
Displayed
Fault Remedy
- Noticeable reduction in water flow. Inlet water filter needs to be cleaned.
10
Not enough combustion air.
Check for physical blockages around air
intake or exhaust.
Check combustion fan.
11
No ignition / Gas supply.
Check gas solenoid valve, gas supply
and ignition unit.
12
Flame failure / Earth leakage.
Check gas solenoid valve, gas supply.
Check flame rod.
Check earth wire lead.
Check remote control.
14
High flame safety device. Check overheat circuit
16
Over temperature warning. Modulating control valve problem.
32
Outgoing water temperature
sensor faulty.
Check hot water thermistor and wire.
34
Combustion air temperature
sensor faulty.
Check air intake thermistor and wire.
52
Gas modulating valve faulty. Check gas modulating valve and PCB.
61
Combustion fan failure. Check combustion fan.
71
Micro-processor failure or
solenoid circuit failure.
Check solenoids and PCB.
72
Flame rod circuit error. Check flame rod and PCB.
13
ERROR MESSAGES
If you 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.
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: isolate the pump, then start the water heater
before restarting the pump. This is a safety feature.
The pump should also be fitted with a thermostat to prevent the return temperature
reaching the heater set point temperature.
To reset the heaters follow the steps.
1. Turn off all hot water taps.
2. Turn off supply to secondary circulating pump or alternatively, if heater and pump
are fed from the same electrical supply, 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.
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.
Check the gas valve at the heater and at the gas meter is fully open.
Open the hot water tap fully.
Heater starts then the
water goes cold.
Check the power is on.
Open your hot water tap further or try another hot outlet.
14
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.
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 appliance.
If you are unsure of any point contact Rinnai or your
supplier.
INSTALLATION INSTRUCTIONS
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