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user’ 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 i.e. by the gas meter.

Your local MTS Servicing Centre is at your 

complete disposal for all requirements.

The  installation  and  first  ignition  of  the  boiler  must  be 

performed by qualified personnel in compliance with current 

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. 

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 follow-

ing directives:

90/396/CEE

  relating to gas appliances 

2004/108/CEE

  relating to electromagnetic compatibility

92/42/CEE

  relating to energy efficiency

2006/95/CEE

  relating to electrical safety

GUARANTEE

The appliance is guaranteed for 4 months from the date of purchase.
Aristons only obligation under the guarantee will be to repair or repla-
ce the faulty appliacnce at Aristons discretion.  This will be carried out 
where the fault arises from within defects in the appliance, caused either 
by material or workmanship of the manufacturer.
This guarantee does not protect malfunction or damage arising from 
incorrect installation, commissioning or maintenance procedures as laid 
out in the installation and servicing manual, inefficient flue system, poor 
or incorrect electricicty, wrong gas supply or pressure, tampering by 
inexperienced persons and any other cause not directly due to manufac-
ture.
MTS (GB) Limited cannot accept responsibility for any cost arising from 
repair or maintenance carried out by any third party.
Service under the guarantee does not affect the expiry date of the gua-
rantee.  The guarantee on parts and appliances which are exchanged 
ends when the guarantee on the original appliance expires.
This guarantee does not affect your statutory rights.
You must have your boiler serviced at the end of the first year to validate 
your guarantee for the second year.

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  ap-

pliance.

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  ap-

pliance 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 discon-

nected 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 (step ladders 

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 dome-

stic 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, discon-

nect 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.

Summary of Contents for CLAS HE 24

Page 1: ... wall hung system boiler G C N 47 116 51 24 kW G C N 47 116 52 30 kW G C N 47 116 53 38 kW CLAS HE CLAS HE 24 CLAS HE 30 CLAS HE 38 The code of practice for the installation commissioning servicing of central heating systems ...

Page 2: ... fault arises from within defects in the appliance caused either by material or workmanship of the manufacturer This guarantee does not protect malfunction or damage arising from incorrect installation commissioning or maintenance procedures as laid out in the installation and servicing manual inefficient flue system poor or incorrect electricicty wrong gas supply or pressure tampering by inexperi...

Page 3: ...abled burner anti freeze protection enabled The second and third figures indicate the flow temperature when no heating requests have been made the flow temperature in central heating mode the temperature of the hot water in domestic hot water mode the flow temperature in anti freeze mode Auto Function The AUTO function serves to optimise boiler performance while maintaining an optimum radiator tem...

Page 4: ...et the temperature of the heating water by adjusting the knob 6 By placing the indicator somewhere between min and max a temperature may be obtained which varies from about 20 C to about 45 C low temperature and about 35 C to about 82 C high temperature Domestic hot water temperature adjustement It is possible to set the temperature of the domestic hot water by adjusting the knob 11 a temperature ...

Page 5: ...t exchanger is kept warm for 30 mins 2 As soon as DHW is drawn the secondary heat exchanger is kept warm permanently This function may be enabled by pressing the COMFORT button Switching off the heating To switch off the heating mode turn the button 6 in the position The boiler switches in sanitary mode only and indicating the set temperature Stand by To switch off the boiler press the ON OFF 13 S...

Page 6: ...water leak at some point in the system If this is the case please contact your installer and ask them to check it Operation shutdown This type of error is non volatile which means that it is not removed automatically The display will flash Err and the error code and the red led lights up 3 In this case the boiler does not restart automatically but it may be reset by pressing the button If the prob...

Page 7: ...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 o...

Page 8: ...rk 2 High Wycombe Ballycoolin Bucks HP13 5FT Dublin 15 Telephone 01494 755600 Telephone 01 810 3723 Fax 01494 459775 Fax 01 810 3727 Internet www mtsgroup com uk Internet www mtsgroup com ie E mail info uk mtsgroup com E mail info ie mtsgroup com Technical Advice 0870 241 8180 Technical Advice 01 437 0121 Customer Service 0870 600 9888 Customer Service 01 437 0121 ...

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