Ariston E-COMBI 24 30 38 - Manual (Page 12)

12
installation
Flushing and Water Treatment
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.
IMPORTANT
Failure carry out the water treatment procedure will invalidate
the appliance guarantee.
System Controls
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.
Location
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.
Where a room sealed appliance is installed in a room containing
a bath or shower, the appliance and any electrical switch or
appliance control, utilising mains electricity should be situated
specifi cally in accordance with current IEE Wiring Regulations.
For unusual locations, special procedures may be necessary. BS
6798:2009 gives detailed guidance on this aspect.