Ariston E-COMBI 24 30 38 Manual Do Utilizador

12

The boiler is equipped with a stainless steel heat exchanger.
The detailed recommendations for water treatment are given in BS 
7593:1992 (Treatment of water in domestic hot water central heating 
systems); the following notes are given for general guidance.
If the boiler is installed on an existing system, any unsuitable additives 
must be removed.
Under no circumstances should the boiler be fi red before the system 
has been thoroughly fl ushed; the fl ushing procedure must be in line 
with BS 7593:1992.
We highly recommend the use of a fl ushing detergent appropriate for 
the metals used in the circuit.  These include cleansers produced by 
Fernox BetzDearbon, whose function is to disolve any foreign matter 
that may be in the system.
In hard water areas or where large quantities of water are in the 
system the treatment of water to prevent premature scaling of the 
main exchanger is necessary.
The formation of scale heat compromises the effi

    ciency of the thermic 

exchanger because small areas of scale cause a high increase of the 
temperature of the metallic walls and therefore add to the thermal 
stress of the heat exchanger.
Demineralised water is more aggressive so in this situation it is 
necessary to treat the water with an appropriate corrosion inhibitor.
Any treatment of water by additives in the system for frost protection 
or for corrosion inhibition has to be absolutely suitable for all metals 
used in the circuit.
The use of a corrosion inhibitor in the sysem such as Fernox MB-
1, BetzDearborn Sentinel X100 or Fernox System Inhibitor is 
recommended to prevent corrosion (sludge) damaging the boiler and 
system.
If anti-freeze substances are to be used in the system, check carefully 
that they are compatible with the metals used in the circuit.
ARISTON suggests the use of suitable anti-freeze products such as 
Fernox ALPHI 11, which will prevent rust and incrustation taking place.
Periodicaly check the pH balance of the water/anti-freeze mixture of 
the boiler circuit and replace it when the amount measured is out of 
the range stipulated by the manufacturer (7 < pH < 8).
DO NOT MIX DIFFERENT TYPES OF ANTI-FREEZE
In under-fl oor systems, the use of plastic pipes without protection 
against penetration of oxygen through the walls can cause corrosion 
of the systems metal parts (metal piping, boiler etc), through the 
formation of oxides and bacterial agents.
To prevent this problem it is necessary to use pipes with an “oxygen 
proof barrier”, in accordance with standards DIN 4726/4729.  
If pipes of this kind are not used, keep the system separate by 
installing heat exchangers of those with a specifi c system water 
treatment.

The boiler is electrically controlled and is suitable for most modern 
electronic time and temperature controls.  The addition of such 
external controls can be benefi cial to the effi

  cient operation of the 

system. The boiler connections for external controls are 12V DC and 
so only controls of 12V  DC that have voltage free contacts should be 
used.  (page 25).
ARISTON supply a range of wired and wireless system controls. 

 

Contact your supplier for more details.

The boiler can be installed on any suitable internal wall (suitable 
sound proofi ng may be required when installing onto a stud partition 
wall).  Provision must be made to allow for the correct routing of the 
fl ue and siting of the terminal to allow the safe and effi

  cient removal 

of the fl ue products.  
A compartment or cupboard may be used provided that it has been 
built or modifi ed for this purpose.  
It is not necessary to provide permanent ventilation for cooling 
purposes.  Detailed recommendations are given in BS 5440 Part 2. 
If it is proposed that it is to be installed in a timber framed building 
then reference should be made to British Gas Document DM2, IGE/
UP/7 or advice sought from Gas Safe.

For unusual locations, special procedures may be necessary.  BS 
6798:2009 gives detailed guidance on this aspect.