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5.10 Water treatment
C.h. circuit
Where a new boiler is fitted to a new sys-
tem with either plastic or copper pipes, it
is important the system is fully flushed, on
completion, to ensure flux residues, swarfs,
oils and other installation debris is removed.
Where a new boiler is fitted to an existing
system, it is important the debris from the
existing system is fully removed in order to
ensure the efficiency of the new appliance
is maintained.
Details on flushing procedure are given in
the section "Initial filling of the system" to
page 45 of this manual.
D.h.w. circuit (scale protection)
In areas where the water is 'hard' (i.e. more
than 200 ppm total hardness as defined by
BS 7593: 2006 Table 2) it is recommended
that a proprietary scale-reducing device is
fitted into the boiler cold supply, within the
requirements of the local water company.
5.11 Electrical supply
Warning, this appliance must be earthed
External wiring to the appliance must be
carried out by a competent person and be in
accordance with the current I.E.E. Regula-
tions and any local regulations which apply.
Reference should be made to the current
ETCI rules for electrical installations.
For Ireland (IE), refer to I.S.813.2002.
The boiler is supplied for connection to a
230 V~ 50 Hz supply. The supply must be
fused at 3A.
The method of connection to the electricity
supply must facilitate complete electrical
isolation of the appliance by the use of a
fused spur isolation switch. Its installation
permits a complete switching off in the con-
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GENERAl REQUIREMENTS
ditions of the overvoltage category III. Alter-
natively it can be used a 3A fused three pin
plug and unswitched shuttered socket outlet
both complying with BS 1363.
The point of connection to the electricity
supply must be readily accessible and adja-
cent to the appliance, except where the ap-
pliance is installed in a bathroom, this must
then be sited outside the bathroom.
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