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installation
Type of air suction/fl ue gas exhaust ducting
Combustion air drawn from the
room
B23
Air drawn from the room
B33
Individual or shared fl ue gas
exhaust ducting built into
the building
Air drawn from the room
Combustion air intake from outside
C13
Flue gas exhaust and air
suction duct through
external wall in the same
range of pressure
C33
Flue gas exhaust andair
suction duct from
outsidewithroof terminalin
the same range of pressure
C43
Individual or shared fl ue
gas exhaust and air suction
through fl ue ducting built
into the building
C53
Flue gas exhaust leading
outside and air suction duct
through external wall not in
the same range of pressure
C83
Flue gas exhaust through
individual or shared fl ue
ducting built into the
building
Air suction through external
wall
36
WARNING
Before performing any work on the boiler, fi rst disconnect it from
the electrical power supply using the external bipolar switch.
Electrical connections
For increased safety, ask a qualifi ed 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 effi ecient 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.
In the event that the power supply cable must be changed, replace it
with one with the same specifi cations.
Power supply cable
60
N
L
Important!
Connection to the electricity mains supply must be performed
using a fi xed connection (not with a mobile plug) and a bipolar
switch with a minimum contact opening of 3 mm must be fi tted.
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 eff ects caused by lightning. If
the mains fuses need to be replaced, use 2A rapid fuses.
H05V2V2-F
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