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installation
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.
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.
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
BS 7593:2006 (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 BS 7593:2006.
We highly recommend the use of a 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 e 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.
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 speci c system
water treatment.
IMPORTANT
Failure to 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 bene cial to the e 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 proo ng 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 e cient removal of the ue products. A compartment or
cupboard may be used provided that it has been built or modi 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 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 speci cally in accordance with current IEE Wiring
Regulations.
For unusual locations, special procedures may be necessary. BS
6798 gives detailed guidance on this aspect.