Page 1
G.C.N.: 41-116-52 (24 kW)
CONDENSING WALL-HUNG GAS BOILER
CLAS One R
USER’S MANUAL
Country of Destination: GB/IE
HOT WATER I HEATING I RENEWABLES
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USER’S MANUAL
Dear Customer,
Thank you for choosing an ARISTON boiler.
We guarantee that your boiler is a reliable and
technically sound product.
This manual provides detailed instructions and
recommendations for proper installation, use and
maintenance.
Remember to keep this manual in a safe place for future
reference.
WARRANTY
This appliance is in warranty from the date of installation.
Proof of installation or purchase and annual servicing must
be provided upon request. The installation must have been
carried out by a Gas Safe Registered engineer.
Ariston is obliged under this warranty to repair or replace a
faulty appliance under our terms and conditions.
Any repair or replacement will be at Ariston’s discretion.
This warranty will only apply where the fault arises from
defects in the appliance, caused either by material or
workmanship of the manufacturer.
This warranty does not cover malfunction or damage
arising from incorrect installation, commissioning or
maintenance procedures as advised in the Installation and
Servicing manual, inefficient flue system, poor or incorrect
electricity and wiring, incorrect gas supply or pressure,
tampering by inexperienced persons and any other cause
not directly related to manufacture.
Ariston Thermo Uk Ltd cannot accept responsibility for any
cost arising from repair or maintenance carried out by any
third party.
This warranty does not affect your statutory rights.
The appliance must be registered with Ariston within 30
days from date of installation.
The boiler must be serviced annually either by a local Gas
Safe Registered engineer or managed by Ariston directly
which can be arranged by calling
If the boiler is not serviced directly through Ariston then
proof service must be sent in to Ariston UK (address on
back cover of manual).”
0333 240 8777.
Thank you for choosing an Ariston
boiler compatible with Ariston
Net, the service designed and
manufactured by Ariston, to
provide a whole new experience in
using a domestic heating system.
Ariston Net allows you to start,
stop and check the temperature
of domestic heating and water
anytime, anywhere from a smartphone, tablet or PC. It
allows you to constantly monitor energy consumption to
ensure you save on your gas bill. It also noties you in
real time if there is a boiler failure. If a remote diagnostic
service is activated, the service centre will be able to
solve problems remotely where possible or arrange an
appointment at your earliest convenience.
* The installation must have been carried out by a Gas
Safe Registered engineer.
For more information call us on 0333 240 8777.
If you smell gas or are worried about gas
safety, you can call the
National Gas Emergency Service free on
0800 111 999
at any time, day or night.
Registration is online at
www.ariston.com/uk
The Benchmark commissioning checklist,
which can be found at the back of
the Installation instructions, must be
completed in full by the installer.
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SAFETY REGULATIONS
Key to symbols:
Failure to comply with this warning
implies the risk of personal injury, in some
circumstances even fatal
Failure to comply with this warning implies
the risk of damage, in some circumstances
even serious, to property, plants or animals.
Do not perform operations which involve opening
the appliance.
Electrocution from live components.
Personal injury caused by burns due to
overheated components, or wounds caused
by sharp edges or protrusions.
Do not perform operations which involve removing
the appliance from its installation space .
Electrocution from live components.
Flooding caused by water leaking from
disconnected piping.
Explosions, res or intoxication caused by gas
leaking from disconnected piping.
Do not damage the power supply cable.
Electrocution from live uninsulated wires.
Do not leave anything on top of the appliance.
Personal injury caused by an object falling o
the appliance as a result of vibrations.
Damage to the appliance or items underneath
it caused by the object falling o as a result of
vibrations.
Do not climb onto the appliance.
Personal injury caused by the appliance falling.
Damage to the appliance or any objects
underneath it caused by the appliance falling
away from its installation space.
Do not climb onto chairs, stools, ladders or
unstable supports to clean the appliance.
Personal injury caused by falling from a height
or cuts (stepladders shutting accidentally).
Do not attempt to clean the appliance without rst
switching it o and turning the external switch to
the OFF position.
Electrocution from live components.
Do not use insecticides, solvents or aggressive
detergents to clean the appliance.
Damage to plastic and painted parts.
USER’S MANUAL
Do not use the appliance for any use other than
normal domestic use.
Damage to the appliance caused by operation
overload.
Damage caused to objects treated
inappropriately.
Do not allow children or inexperienced individuals
to operate the appliance.
Damage to the appliance caused by improper
use.
If you detect a smell of burning or smoke
coming from the appliance, disconnect it from
the electricity supply, turn o the main gas valve,
open all windows and call for assistance.
Personal injury caused by burns, smoke
inhalation, intoxication.
If there is a strong smell of gas, turn o the main
gas valve, open all windows and call for
assistance.
Explosions, res or intoxication.
This appliance can be used by children aged
from 8 years and above and person with
reduced physical, sensory or mental capabilities
or lack of experience and knowledge if they
have been given supervision or instruction
concerning use of the appliance in a safe way
and understand the hazards involved. Children
shall not play with the appliance. Cleaning
and user maintenance shall not be made by
children without supervision.
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USER’S MANUAL
The installation and rst ignition of the
boiler must be performed by qualied Gas
Safe Registered engineer in compliance with
Gas Safety (instillation & use) regulations
and all other national regulations regarding
installation, and in conformity with any
requirements established by local authorities
and public health organisations.
After the boiler has been installed, the installer
must ensure that the end user receives the
declaration of conformity and the operating
manual, and should provide all necessary
information as to how the boiler and the safety
devices should be handled.
This appliance is designed to produce hot water for domestic
use (combi version).
It should be connected to a heating system and a distribution
network for domestic hot water, both of which must be compatible
with its performance and power levels.
The use of the appliance for purposes other than those
specied is strictly forbidden. The manufacturer cannot be held
responsible for any damage caused by improper, incorrect and
unreasonable use of the appliance or by the failure to comply
with the instructions given in this manual.
Installation, maintenance and all other interventions must be
carried out in full conformity with the governing legal regulations
and the instructions provided by the manufacturer. Incorrect
installation can harm persons, animals and possessions; the
manufacturing company shall not be held responsible for any
damage caused as a result.
In the event of any maintenance or other structural work in the
immediate vicinity of the ducts or ue gas exhaust devices and
their accessories, switch the appliance off by switching the
external bipolar switch to the “OFF” position and shutting off the
gas valve.
When the work has been completed, ask a qualied technician
to check the efciency of the ducting and the devices.
If the boiler should be out of use for a prolonged period, it is
recommended that the electrical power supply be disconnected
and that the external gas cock be closed. If low temperatures are
expected, the boiler and system pipe work should be drained in
order to prevent frost damage.
Turn the boiler off and turn the external switch “OFF” to clean
the exterior parts of the appliance.
Do not allow children or inexperienced persons to use the
appliance without supervision.
Ariston is a licensed member of the
Benchmark Scheme which aims to
improve the standards of installation
and commissioning of domestic heating
and hot water systems in the UK and to
encourage regular servicing to optimise
safety, efciency and performance.
Benchmark is managed and promoted
by the Heating and Hotwater Industry
Council.
For more information visit
www.benchmark.org.uk.
The Benchmark commissioning checklist, which
can be found at the back of the installation
instructions, must be completed in full by the
installer and be left with the boiler or be made
available upon request by any attending Ariston
representative.
CE labelling
The CE mark guarantees that the appliance conforms to the
following directives:
- 2016/426/EU
relating to gas appliances
-
2014/30/EU
relating to electromagnetic compatibility
- 92/42/CEE
relating to energy efciency
-
2014/35/EU
relating to electrical safety
- 2009/125/CE
Energy related Products
- 813/2013
Commission regulation (EU)
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CONTROL PANEL
21 3 4 5 6 7 8
Legend:
1. Display
2. Domestic Hot Water adjustment button +/-
NOT ACTIVE (a)
3. MODE button
(Operation mode selection summer/winter)
4. COMFORT button NOT ACTIVE
5. ON/OFF button
6. Auto button (To activate Thermoregulation)
7. RESET button
8 Heating temperature adjustument button +/- (b)
USER’S MANUAL
(a)
Pressing the buttons simultaneously allows
access to the engineers menu and all
parameters and settings
(b)
Use these buttons to modify and save the
parameter settings
DISPLAY
Legend:
Digits indicating:
- boiler status
- temperature indication with bar level
- error code signals (ERROR)
- Request press RESET button (boiler block)
- menu settings
Technical assistance request
Flame detected with indication of power
used
Heating operation set
AUTO
AUTO function activated
High efciency operation (low C.H. ow
temperature)
Solar temperature probe connected option
Error signals
The display shows the code
External temperature displayed
(with external sensor optional)
Wi-Fi active (Kit Optional)
Heating operation active
Hot Water Comfort activated
Boiler off with antifreeze function active
Anti-frost Function Active
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USER’S MANUAL
Initial operating procedures
Check the water pressure on the system pressure gauge and
make sure that the gure is between 0.6 and1.5 bar when the
system is cold.
ATTENTION!
DEAERATION CYCLE
THE DEAERATION CYCLE IS AUTOMATICALLY ACTIVATED
WHEN THE BOILER IS POWERED ON FOR THE FIRST
TIME.
THE DISPLAY SHOWS “PURGEPURGE“.
AT THE END OF THE FUNCTION (7 MINUTES) THE
DISPLAY RETURNS TO NORMAL VIEW.
Ignition procedure
Press the ON/OFF button
boiler
The display shows
:
on the control panel to switch on the
Switching o the heating
Switching o the boiler
To switch o the heating, press the ON/OFF button; the display
will switch o.
THE ANTI-FROST FUNCTION REMAINS ACTIVE.
ATTENTION!!
SWITCH OFF THE BOILER COMPLETELY BY SWITCHING THE
EXTERNAL ELECTRICAL SWITCH TO THE OFF POSITION.
SHUT OFF THE GAS VALVE.
- the operating mode:
- the set temperature in central heating mode
Adjusting the heating
It is possible to set the temperature of the heating water by
pressing the buttons 8.
The temperature that may be obtained.which varies from 20°C
to 45°C (low temperature) and 35°C to 82°C (high temperature).
The ignition of the burner is indicated on the display by the
symbol
utilised.
the dashes underneath indicate the power
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Auto button - Temperature adjustment activation
The AUTO function enables boiler operation to be adapted to
environmental conditions and to the type of system it is installed
on.
Comfortable temperature is reached inside the room in the
quickest way possible, without wasting money, energy or
eciency, while substantially reducing the amount of wear
experienced by the components.
Your installer will advise you on the devices connectable
to the boiler and will program it according to the system.
In normal boilers the water temperature inside the heating
elements is usually set to a high value (70-80°C), thereby ensuring
eective heating during the few really cold winter days. It then
becomes excessive on less cold days (of which there are many)
more typical of the autumn and winter seasons. This leads to
excessive room heating after the thermostat has been switched
o, resulting in energy waste and uncomfortable conditions
inside the room.
The AUTO function “takes control” of the boiler and selects
the best operating regime based on environmental conditions,
external devices connected to the boiler and the performance
required. It constantly decides at which power level to
operate based on the environmental conditions and the room
temperature required.
USER’S MANUAL
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USER’S MANUAL
Appliance shut-o conditions
The boiler is protected from malfunctions by means of internal
checks performed by the electronic P.C.B., which stops the boiler
from operating if necessary. In the event of the boiler being shut
o in this manner, a code appears on the control panel display
which refers to the type of shut-o and the reason behind it.
Two types of shut-o may occur:
Safety shut-o
This type of error is “volatile”, which means
that the boiler starts up again automatically
as soon as the problem which caused the
shut-o is removed;
(e.g.
code
display and the
In fact, soon as the cause of the shut-o
disappears, the boiler starts up again and
continues to operate normally.
If the boiler still indicates a safety shut-o,
switch it o. Make sure the external electric
switch is in the OFF position, shut o the gas valve and contact a
qualied technician.
Operation shutdown
This type of error is “non-volatile”, which means that it is not
removed automatically.
On the display ash
and appears the symbol
In this case the boiler does not restart automatically, but it may be
reset by pressing the
If the problem manifests itself again after several attempts to
reset the appliance, contact a qualied technician.
/ ) ash on the
symbol appears.
and the error
and the error code
.
button.
,
e.g.
Err/501
Operation shutdown error table
Display Description
1 01 Overheating
1 03
1 04
Insucient circulation
1 05
1 06
1 07
3 05 P.C.B. error
3 06 P.C.B. error
3 07 P.C.B. error
5 01 No ame detection
Anti-frost Device.
The anti-frost function acts on the central heating flow temperature
probe, independently from other settings, when the electrical
supply is turned on.
If the primary circuit temperature falls below 8°C the pump will run
for 2 minutes.
After the two minutes of circulation (fixed) the boiler will check the
following:
a) if the flow temperature is > 8°C, the pump stops;
b) if the flow temperature is between 4 and 8°C, the pump will run
for another two minutes;
c) if the flow temperature is < 4°C, the burner will fire at
minimum power until the temperature reaches 33°C, the
burner will go off and the pump will continue to run for two
minutes.
The anti-frost device activates only when (with the boiler operating
correctly):
- the boiler is electrically powered,
- there is a supply of gas.
- there is a supply of gas.
Important
If this shutdown occurs frequently, contact an authorised
service centre for assistance. For safety reasons, the boiler
will allow a maximum of 5 reset operations to take place in 15
minutes (individual presses of the
If the shutdown is occasional or an isolated event, this is not
Necessarily a problem.
8 /
button).
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USER’S MANUAL
Disposal and recycling boiler.
Our products are designed and manufactured by using
components made from recyclable materials where
possible.
The boiler and its accessories have to be adequately
disposed of and the various materials separated where
possible.
The packaging used for the transport of the boiler must be
disposed of by the installer.
ATTENTION!!
Recycling and disposal of the boiler and the accessories
must be made as required by regulations.
This product conforms
to Directive WEEE 2012/19/EU.
The symbol of the crossed waste paper basket on the
appliance indicates that at the end of its working life the
product should be disposed of separately from normal
domestic household rubbish, it must be disposed of at a
waste disposal centre with dedicated facilities for electric
and electronic appliances or returned to the retailer when
a new replacement product is purchased.
The user is responsible for the disposal of the product at
the end of its life at an appropriate waste disposal centre.
The waste disposal centre (which using special treatment
and recycling processes eectively dismantles and
disposes of the appliance) helps to protect the environment
by recycling the material from which the product is made.
For further information about waste disposal systems visit
your local waste disposal centre or the retailer from which
the product was purchased.
Change of gas type
Our boilers are designed to function either with Natural Gas
(Methane, G20) or LPG (Propane, G31).
If you need to change from one gas to another then you should
speak to a Gas Safe Registered engineer or please call Ariston
on 0333 240 8777.
Maintenance
Schedule an annual service for the boiler with a Gas Safe
Registered engineer.
Correct maintenance always results in savings in the cost of
running the system.
Failure to arrange an annual service for the appliance will
invalidate the warranty of the appliance.
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Page 10
Terms & Conditions
WHAT ARISTON REQUIRES
· The boiler must be registered with Ariston within 30 days from date of installation. Registration is on line
at www.ariston.com/uk
· The boiler must be installed in accordance with the manufacturers instructions
· The boiler must be installed by a Gas Safe Registered engineer.
· The installer must arrange for a Building Regulations Compliance Certicate to be issued to the boiler
owner.
· The Building Regulations Compliance Certicate is to be made available upon request by any attending
Ariston service representative.
· The Benchmark commissioning checklist, which can be found at the back of the Installation instructions,
must be completed in full by the installer.
· The completed Benchmark checklist must be left with the boiler or be made available upon request by
any attending Ariston representative.
· The boiler must be serviced by the 12 month anniversary of the installation. This must be carried out by a
Gas Safe Registered engineer.
· Proof of annual service must be made available upon request by any attending Ariston representative.
· The boiler must be installed on a clean system and corrosion inhibitors added. Fitting a magnetic lter is
suggested.
All of the above are standard procedures which a competent installer will be aware of.
Failure to comply with any of the above will result in any warranty being withdrawn.
CONDITIONS OF THE WARRANTY
• Ariston must be contacted immediately following any malfunction. Access must be granted for an Ariston
approved engineer to inspect the appliance and it’s installation. We are unable to cover any costs under
warranty where Ariston have not been contacted and allowed access to inspect the appliance and
installation. Removal or repair of the appliance by any other party than Ariston without prior inspection or
authorisation will void this warranty.
• The warranty is only applicable to appliances installed in the United Kingdom.
• The following is not covered under the warranty:
- Any external boiler controls (other than those supplied by Ariston), pipework and radiators
- Loss or damage caused by using the boiler in a non-domestic or commercial environment.
- Loss or damage caused by accident, theft, attempted theft, malicious damage or damage caused by
re or explosion.
- Damage caused by any disaster affecting the equipment including neglect without limitation.
- Clearing airlocks and partially or fully blocked pipes or work caused by equipment, which has not
installed correctly.
- Dirty systems/dirt particles degradation of the boiler from other parts of the system.
- Claims arising from any problem with the supply of electricity, gas or water.
- Consequential loss or damage arising directly or indirectly caused by the boiler not working. Cosmetic
damage.
- Costs arising from difculties in getting to the boiler. This includes: pipe work under oor boards or pipe
work contained in the fabric of the building. Ariston requires the warranty holder to carry out whatever
works are necessary to enable Ariston staff or nominated representatives to gain access the boiler
prior to arrival.
- Any water pressure adjustments on sealed systems, Claims arising from scale damage.
- Any modication, alteration to the boiler carried out without permission or authority from Ariston
.
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ITALIAN DESIGN
Ariston Thermo UK Ltd
Artisan Building
Hillbottom Road
High Wycombe
Bucks HP12 4HJ
Telephone: 01494 418500
ariston.com/uk
Customer Service: 0333 240 8777
Ariston Thermo S.p.A.
Viale Aristide Merloni 45
60044 Fabriano (AN)
ITALY
ariston.com
420011055401
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