11
3. installation
3.1.3 Gas Supply
The gas installation and tightness testing must be in
accordance with the requirements of BS6891. Ensure that
the pipe size is adequate for demand including other gas
appliances on the same supply.
3.1.4 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. It should only supply
the appliance.
3.1.5 Water Supply
The boiler is suitable for sealed systems only. The maximum
working pressure for the appliance is 6 bar. All fi 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 fi 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.
3.1.6 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.
3.1.7 FLUSHING AND WATER TREATMENT
The abovementioned boiler is equipped with an aluminium
primary heat exchanger, therefore several primary heating
circuit water treatment measures are necessary for optimal
operation.
A few general warnings are provided below.
If the boiler is installed as part of an existing system, we
recommend all unsuitable additives are removed.
We recommend the appliance is only switched on after the
system has been fl ushed in accordance with BS 7593.
For correct cleaning, use chemical products suited to the
metals applied in the system (including aluminium alloys),
as these are designed to dissolve and eliminate all impurities
within the circuit. The cleaning product prepares the circuit for
the addition of an inhibitor, which ensures that no impurities
accumulate on the heat exchanger, thus preventing the
effi ciency of the heat exchange process from being diminished.
Fernox S3 and Sentinel X400 are compatible with this boiler.
We also recommend protecting the exchanger from scale
build-up, corrosion and sediment formation by adding
suitable chemical products such as Fernox F1 or Sentinel
X100 inhibitors.
Protecting the heat exchanger from scale build-up and
corrosion is of primary importance. All water is subject to
the infi ltration of impurities, and in some cases more than
others, depending on geographical location. Premature scale
build-up on the heat exchanger may cause the heat exchange
process to become less effi cient; the resulting scales may jam
circuit components and reduce the estimated lifespan of the
entire system.
If antifreeze products are used in the circuit, make sure they
are compatible with aluminium. We especially advise against
using widely available ethylene glycol which, besides being
corrosive to aluminium and its alloys, can also become toxic.
ARISTON suggests using suitable antifreeze products such
as Fernox ALPHI 11, which guarantees excellent anti-frost
protection and is compatible with all metals.
We recommend the pH of the water/antifreeze mixture is
checked regularly.
If the value falls outside the range specifi
ed by the
manufacturer (7<pH<8), treat the system again. Never mix
different types of antifreeze product.
In underfl oor systems, the use of plastic pipes which are not
protected from the penetration of oxygen may cause oxides
or bacterial substances to form. To prevent this problem from
occurring, we recommend using pipes fi tted with oxygen
barriers.
IMPORTANT
Failure to carry out the water treatment procedure will
invalidate the appliance warranty.
3.1.8 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 26).
ARISTON supply a range of wired and wireless system
controls. Contact your supplier for more details.
3.1.9 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 CORGI.
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
gives detailed guidance on this aspect.
Summary of Contents for EGIS HE 24
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