Water Treatment; 5.10 Electrical Supply - Biasi Inovia 16S User Manual

mum flow of 200-300 lts/hr through the main
heat exchanger.
If you are installing a system that includes
thermostatic radiator valves (TRV) and/or
small bore (8-10 mm) it may be necessary
to fit an external by-pass to facilitate correct
operation of the boiler.
The fitting of an external bypass helps to
prevent and limit system noise.
Air release points
These must be fitted a tall high points where
air will natural collect and must be sited to
facilitate complete filling of the system.
Expansion vessel
The appliance has an integral sealed expan-
sion vessel to accommodate the increase of
water volume when the system is heated.
Refer to Fig. 4.4 on page 34 for its techni-
cal data.
If the heating circuit has an unusually high
water content, calculate the total expansion
and add an additional sealed expansion
vessel with adequate capacity.
Mains water feed: central heating
There must be no direct connection to the
mains water supply even through a non re-
turn valve, without the approval of the Local
Water Authority.
Filling
A method for initially filling the system and
replacing water lost during servicing must
be provided and it must comply with local
water authority regulations.
The correct method is shown in Fig. 5.4.
The temporary connection must be re-
moved immediately after filling.
GENERAL REQUIREMENTS
Supply pipe
(cold water inlet)
C.h. return pipe
Fig. 5.4
The installer should ensure that no leaks ex-
ist either inside the boiler or on the system
as frequent filling of the system could cause
premature scaling of the heat exchanger.
5.9

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 58 of this manual.

5.10 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.
Control valve
Double check valve
Temporary
connection
Control valve
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