Clas System ONE - Instant water heater and water tank Ariston Thermo - Free user manual and instructions
Find the device manual for free Clas System ONE Ariston Thermo in PDF.
| Product Type | Wall-mounted gas combi boiler (instantaneous water heater and hot water storage) |
| Models | CLAS ONE, CLAS SYSTEM ONE, CLAS NET ONE |
| Power Ratings | 18 kW, 24 kW, 30 kW, 38 kW |
| Fuel | Natural Gas (Methane G20) or LPG (Propane G31) |
| Gas Category | I2H (Natural Gas), I3P (LPG) |
| Warranty | 8 years (CLAS ONE), 12 years (CLAS NET ONE) |
| Control Panel | Digital display, buttons for DHW temperature, heating temperature, mode, comfort, auto, reset, on/off, mechanical clock |
| Heating Temperature Range | Low: 20°C - 45°C, High: 35°C - 82°C |
| DHW Temperature Range | 36°C - 60°C |
| Comfort Function | Pre-heats secondary heat exchanger or external tank for faster hot water |
| Auto Function | Adapts boiler operation to environmental conditions for energy efficiency |
| Anti-Frost Protection | Activates pump and burner when primary circuit temperature drops below 8°C |
| Safety Features | Overheating protection, low water pressure cut-off, flame detection, error codes (e.g., 101, 103, 108, 301-307, 501) |
| Water Pressure (Cold System) | 0.6 - 1.5 bar (recommended 1 bar) |
| Installation Requirements | Gas Safe Registered engineer, comply with Gas Safety Regulations and Building Regulations |
| Maintenance | Annual service required to maintain warranty |
| Certifications | CE, Benchmark Scheme, UK Water Supply Regulations |
| Connectivity | Optional Ariston NET Wi-Fi kit for remote control and diagnostics |
| Country of Destination | GB/IE (United Kingdom and Ireland) |
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USER MANUAL Clas System ONE Ariston Thermo
G.C.N.: 47-116-88 (24 KW)
G.C.N.: 47-116-89 (30 KW)
G.C.N.: 47-116-90 (38 kW)
G.C.N.: 47-116-85 (24 KW)
G.C.N.: 47-116-86 (30 KW)
G.C.N.: 47-116-87 (38 KW)
G.C.N.: 41-116-49 (18 kW)
G.C.N.: 41-116-50 (24 kW)
G.C.N.: 41-116-51 (30 KW)
ARISTON
CLAS NET ONE CLAS ONE CLAS SYSTEM ONE
kiwa approved product
UK WATER SUPPLY
REGULATIONS
USER'S MANUAL
Country of Destination: GB/IE
HOT WATER | HEATING | RENEWABLES
Dear Customer,
Thank you for choosing an ARISTON boiler.
We warranty 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 for 8 years (CLAS ONE Models) - 12 years (CLAS NET ONE Models) 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 0333 240 8777.
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).”
Registration is online at www.ariston.co.uk.
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
Ready for
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 notifies 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.
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.
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, fires 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 off the appliance as a result of vibrations.
Damage to the appliance or items underneath it caused by the object falling off 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 first switching it off 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.
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 off 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 off the main gas valve, open all windows and call for assistance.
Explosions, fires 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.
The installation and first ignition of the boiler must be performed by qualified 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 specified 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 flue 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 qualified technician to check the efficiency 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.
CE labelling
The CE mark guarantees that the appliance conforms to the following directives:
2009/142/CEE
relating to gas appliances
- 2014/30/EU
relating to electromagnetic compatibility
- 92/42/CEE
relating to energy efficiency
- 2014/35/EU
relating to electrical safety
- 2009/125/CE
Energy related Products
- 813/2013
Commission regulation (EU)
Do not forget the Log Book!
The Benchmark Scheme
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.
CONTROL PANEL
Legend:
- Display
- Domestic Hot Water adjustment button +/- (a)
-
MODE button
(Operation mode selection summer/winter) -
COMFORT button
-
ON/OFF button
-
Auto button (To activate Thermoregulation)
-
RESET button
8 Heating temperature adjustment button +/- (b)
-
Time clock
-
Pressure gauge
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 | |
| Heating operation active | |
| Hot water operation set | |
| Hot water operation active | |
| COMFORT | Hot Water Comfort activated |
| OFF | Boiler off with antifreeze function active |
| Anti-frost Function Active |
| AUTO | AUTO function activated |
| High efficiency operation (low C.H. flow temperature) | |
| Solar temperature probe connected - optional | |
| Error signalsThe display shows the code | |
| External temperature displayed(with external sensor optional) | |
| Wi-Fi active(Kit Optional - CLAS ONE) |
Initial operating procedures
Check the water pressure on the pressure gauge and make sure that the figure is between 0.6 and 1.5 bar when the system is cold. If the pressure is just under the minimum value the display will request a filling procedure - see note below.
FILLING PROCEDURE RE-ESTABLISH THE CORRECT PRESSURE USING THE FILLING LOOP (POSITIONED UNDERNEATH THE BOILER) AND PRESS THE MODE BUTTON FOR 5 SECONDS. THE DISPLAY SHOWS "PURGE". WHEN THE PRESSURE GAUGE INDICATES A PRESSURE OF 1 BAR, CLOSE THE FILLING VALVE AND PRESS THE MODE BUTTON. THE DISPLAY RETURNS TO NORMAL VIEW.
Re-establish the correct pressure by filling loop.
If the pressure drops very frequently, there may be a water leak at some point in the system. If this is the case a plumber should be contacted.
CLAS ONE / CLAS NET ONE
Note.
Connections viewed from behind boiler.
CLAS SYSTEM ONE
Note.
Connections viewed from behind boiler.
- To repressurise the system ensure flexible hose 3 is connected
- Slowly open taps 1 & 2 (see diagrams above)
- Water will be heard entering the system
- When the pressure gauge reads 1.5 bar close taps 1 & 2
Ignition procedure
Press the ON/OFF button on the control panel to switch on the boiler
The display shows :
- the operating mode:
- the set temperature in central heating mode
- the set temperature of the hot water in domestic hot water
Operating mode selection
Use the MODE button 3 to select the desired operating mode.
| Operating mode | Display |
| heating + hot water production for domestic use - WINTER | |
| hot water production for domestic use only - SUMMER | |
| ONLY HEATING CLAS SYSTEM ONE |
The ignition of the burner is indicated on the display by the
symbol the dashes underneath indicate the power utilised.
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).
Domestic hot water temperature adjustment only for CLAS ONE / CLAS NET ONE MODELS
It is possible to set the temperature of the domestic hot water by pressing the buttons 2 a temperature may be obtained which varies from 36°C to 60°C. The value set previously will flash on the display.
Switching off the heating
To switch off the heating, press the MODE button 3; the heating operation symbol will disappear from the display. The Mode button can be used to keep the domestic hot water production process active or to place it in standby (modes deactivated). In the figure below the boiler remains active only for the production of domestic hot water, indicating the set temperature.
Switching off the boiler
To switch off the boiler press the ON/OFF button, the display will switch off.
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.
Clock Instructions
1. General layout
The mechanical clock covers a 24 hour period. Each tappet represents 15 minutes A. An override switch is located on the clock B.
2. To set the time
To set the time of day, grasp the outer edge of the dial and turn slowly clockwise until the correct time is lined up with the arrow C.
3. To Set the "On" and "Off" times
The clock uses a 24hours system. e.g. 8 = 8.00 am and 18 = 6.00 pm "ON" periods are set by sliding all tappets between the "ON" time and the "OFF" time to the outer edge of the dial. The tappets remaining at the centre of the dial are the "OFF" periods.
4. For operation
Put the selector switch B to the ⏻ symbol to control the central heating by the clock. Put the switch B to "I" to select permanent operation or to "O" to turn the central heating off permanently.
COMFORT function
The boiler allows the 'comfort' level for the output of domestic hot water to be increased through the "COMFORT" function. This function keeps the secondary exchanger (or an external tank) warm during the periods in which the boiler is inactive, thereby bringing the initial thermal condition of the water drawn to a higher temperature.
This function may be enabled by pressing the COMFORT button 4. When the function is enabled the text COMFORT appears on the display..
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 efficiency, 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 effective 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 off, 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.
Appliance shut-off 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 off in this manner, a code appears on the control panel display which refers to the type of shut-off and the reason behind it. Two types of shut-off may occur:
Safety shut-off
This type of error is "volatile", which means that the boiler starts up again automatically as soon as the problem which caused the shut-off is removed; ERROR and the error code (e.g. ERROR / 110) flash on the display and the Symbol appears. In fact, soon as the cause of the shut-off disappears, the boiler starts up again and continues to operate normally.
If the boiler still indicates a safety shut-off, switch it off. Make sure the external electric switch is in the OFF position, shut off the gas valve and contact a qualified technician.
Safety shut-off due to insufficient water pressure
If the water pressure inside the heating circuit is insufficient, the boiler will perform a safety shut-off.
Code 108 (FVLL) will appear on the display.
The system may be restarted, re-balancing the water pressure, by using the filling procedure - see note 1.
If the re-balancing request is performed on a frequent basis, switch the boiler off, bring the external electric switch to the OFF position, shut off the gas valve and contact a qualified technician to check for any leaks of water.
NOTE 1 - FILLING PROCEDURE RE-ESTABLISH THE CORRECT PRESSURE USING THE FILLING LOOP (POSITIONED UNDERNEATH THE BOILER) AND PRESS THE MODE BUTTON FOR 5 SECONDS. THE DISPLAY SHOWS "PURGE". WHEN THE PRESSURE GAUGE INDICATES A PRESSURE OF 1 BAR, CLOSE THE FILLING VALVE AND PRESS THE MODE BUTTON. THE DISPLAY RETURNS TO NORMAL VIEW.
Operation shutdown
This type of error is "non-volatile", which means that it is not removed automatically.
On the display flash RESET and the error code, e.g. Err/SOL and appears the symbol △.
In this case the boiler does not restart automatically, but it may be reset by pressing the RESET button.
If the problem manifests itself again after several attempts to reset the appliance, contact a qualified technician.
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 RESET button).
If the shutdown is occasional or an isolated event, this is not necessarily a problem.
Operation shutdown error table
| Display | Description |
| 1 01 | Overheating |
| 1 03 | Insufficient circulation |
| 1 04 | |
| 1 05 | |
| 1 06 | |
| 1 07 | |
| 1 08 | Insufficient water pressure - see Note 1 |
| 3 05 | P.C.B. error |
| 3 06 | P.C.B. error |
| 3 07 | P.C.B. error |
| 5 01 | No flame 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 central heating flow temperature is >8^ , the pump stops; b - if the central heating flow temperature is between 4 and 8^ , the pump will run for another two minutes;
c - if the central heating flow temperature is <4^ , the burner will fire (heating position) at minimum power until the temperature reaches 33^ , the burner will go off and the pump will continue to run for two minutes.
The activation of the Anti-Frost feature is symbolised by ✿.
The anti-frost device activates only when (with the boiler operating correctly):
- the system pressure is correct;
- the boiler is electrically powered;
- there is a supply of gas.
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.
8 or 12 Year Warranty
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.co.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 Certificate to be issued to the boiler owner.
- The Building Regulations Compliance Certificate 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 filter 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 8 or 12 YEAR 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 8 or 12 Year 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 fire 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 difficulties in getting to the boiler. This includes: pipe work under floor 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 modification, alteration to the boiler carried out without permission or authority from Ariston.
ITALIAN DESIGN
Ariston Thermo UK Ltd
Artisan Building
Hillbottom Road
High Wycombe
Bucks HP124HJ
Telephone: 01494 418500
ariston.co.uk
- CLAS NET ONE CLAS ONE CLAS SYSTEM ONE
- WARRANTY
- Disposal and recycling boiler.
- ATTENTION!!
- SAFETY REGULATIONS
- Do not perform operations which involve opening the appliance.
- Do not perform operations which involve removing the appliance from its installation space.
- Do not damage the power supply cable.
- Do not leave anything on top of the appliance.
- Do not climb onto the appliance.
- Do not climb onto chairs, stools, ladders or unstable supports to clean the appliance.
- Do not attempt to clean the appliance without first switching it off and turning the external switch to the OFF position.
- Do not use insecticides, solvents or aggressive detergents to clean the appliance.
- Do not use the appliance for any use other than normal domestic use.
- Do not allow children or inexperienced individuals to operate the appliance.
- If you detect a smell of burning or smoke coming from the appliance, disconnect it from the electricity supply, turn off the main gas valve, open all windows and call for assistance.
- If there is a strong smell of gas, turn off the main gas valve, open all windows and call for assistance.
- CE labelling
- 2009/142/CEE
- - 2014/30/EU
- - 92/42/CEE
- - 2014/35/EU
- - 2009/125/CE
- - 813/2013
- Do not forget the Log Book!
- The Benchmark Scheme
- CONTROL PANEL
- Legend:
- Initial operating procedures
- Note.
- Ignition procedure
- Operating mode selection
- Adjusting the heating
- Domestic hot water temperature adjustment only for CLAS ONE / CLAS NET ONE MODELS
- Switching off the heating
- Switching off the boiler
- General layout
- To set the time
- To Set the "On" and "Off" times
- For operation
- COMFORT function
- Auto button - Temperature adjustment activation
- Your installer will advise you on the devices connectable to the boiler and will program it according to the system.
- Appliance shut-off conditions
- Safety shut-off
- Safety shut-off due to insufficient water pressure
- Operation shutdown
- Important
- Anti-frost Device.
- Change of gas type
- Maintenance
- or 12 Year Warranty
- Terms & Conditions
- WHAT ARISTON REQUIRES
- CONDITIONS OF THE 8 or 12 YEAR WARRANTY
Brand : Ariston Thermo
Model : Clas System ONE
Category : Instant water heater and water tank