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INSTALLATION
Electrical connections
For increased safety, ask a qualified technician to perform a thorough
check of the electrical system.
The manufacturer is not responsible for any damage caused by the
lack of a suitable earthing system or by the malfunctioning of the
electricity mains supply.
Make sure that the system is able to withstand the maximum power
absorbed by the boiler (this is indicated on the appliance data plate).
Check that the section of the wires is suitable and is not less 0,75
mm
2
The appliance must be connected to an effiecient earthing system if
it is to operate correctly.
The power supply cable must be connected to a 230V-50Hz network,
where the L-N poles and the earth connection are all respected.
Important!
In the event that the power supply cable must be changed, replace
it with one with the same specifications.
Power supply cable
Important!
The appliance is supplied with a fly-lead already
connected, this must be connected to a 240V supply
fused at 3 Amp and must facilitate completed electrical isolation
of the appliance, by use of a fused double pole isolator having
a contact separation of at least 3mm in all poles or alternatively
by means of a 3A fused three pin plug and unswitched shuttered
socket outlet both complying with BS1363.
The use of multiplugs, extension leads or adaptors is strictly
prohibited.
It is strictly forbidden to use the piping from the hydraulic, heating
and gas systems for the appliance earthing connection.
The boiler is not protected against the effects caused by lightning. If
the mains fuses need to be replaced, use 2A rapid fuses.
Electrical connection unit
To access the electrical connection unit carry out the following steps:
- Disconnect the boiler from the power supply
- Loosen the screws on the cover of the outside connection box
below the boiler (see diagram below)
- Open the cover
- The connection PCB may be accessed in order to connect :
Main supply
Live to pump
Zone valves
Outdoor sensor
Switched live connection/s
Cylinder stat
H05V2V2-F
60
N
L
BUS
T B
TA2 SE TNK SOL TA1
WARNING!
BEFORE PERFORMING ANY WORK ON
THE BOILER, FIRST DISCONNECT IT FROM
THE ELECTRICAL POWER SUPPLY USING THE
EXTERNAL BIPOLAR SWITCH AND REMOVE
THE FUSE.
Caution!
For the connection and positioning of the
wires belonging to optional peripheral units,
please refer to the installation manuals of
these units.
23


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