INSTALLATION
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Gas Supply
The gas installation and tightness testing must be in
accordance with the requirements of BS 6891:2015+A1:2019.
Ensure that the pipe size is adequate for demand including
other gas appliances on the same supply.
Electrical Supply
The appliance requires an earthed 230V - 50 Hz supply and
must be in accordance with current I.E.E. regulations. It must
also be possible to be able to completely isolate the appliance
electrically. Connection should be via a 3 amp double pole
fused isolating switch with contact separation of at least 3mm
on both poles. Alternatively, a fused 3 amp, 3 pin plug and
unswitched socket may be used, provided it is not used in a
room containing a bath or shower. It should only supply the
appliance.
Water Supply
The boiler is suitable for sealed systems only. The maximum
working pressure for the appliance is 6 bar. All ttings and
pipework for the appliance should be of the same standard. If
there is a possibility of the incoming mains pressure exceeding
6 bar, particularly at night, then a suitable pressure limiting
valve must be tted.
The boiler is designed to provide hot water on demand to
multiple outlets within the property. If there is a requirement
for greater demands, for example if the boiler has several
bathrooms and cloakrooms, a vented or unvented hot water
storage system may be used.
Showers
Any shower valves used with the appliance should be of a
thermostatic or pressure balanced type. Refer to the shower
manufacturer for performance guidance and suitability.
Flushing and Water Treatment
The boiler is equipped with a stainless steel heat exchanger.
The detailed recommendations for water treatment are given in
BS7593:2019 (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 red before the
system has been thoroughly ushed; the ushing procedure
must be in line with BS7593:2019.
We highly recommend the use of a ushing detergent
appropriate for the metals used in the circuit.
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 efciency 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 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,
which will prevent rust and incrustation taking place.
Periodically 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-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 specic system water treatment.
Ariston suggests the installation of a magnetic lter on every
installation.
IMPORTANT
Failure to carry out the water treatment procedure will
invalidate the appliance warranty.
System Controls
The boiler connections for external controls are 24V.
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 proong may be required when installing
onto a stud partition wall). Provision must be made to allow
for the correct routing of the ue and siting of the terminal to
allow the safe and efcient removal of the ue products. A
compartment or cupboard may be used provided that it has
been built or modied 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 IGEM Document, 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 specically in accordance with current IEE Wiring
Regulations.
For unusual locations, special procedures may be necessary.
BS 6798:2014 gives detailed guidance on this aspect.
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