Electrical connections
For increased safety, ask a qualied 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 efecient 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 specications.
Power supply cable
Important!
The appliance is supplied with a y-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.
Peripheral unit connection
To access peripheral unit connections carry out the following
steps:
- Disconnect the boiler from the power supply
- Remove the casing
- Rotate the control panel while pulling it forwards
- Unhook the two clips to have access to the peripherical
connections and the main P.C.B.
Remote Control (option)
Outdoor
Sensor
Room Thermostat
1
(option)
OK
1 2 3 4 5 6 7
Peripheral connections:
BUS = Remote control connection
FLOOR/TA2 = the underoor heating thermostat or the room
thermostat 2 (selected via parameter 223)
SE = the external sensor.
SOL = Solar temperature probe
TA1 = the room thermostat 1
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.
BUS
T B
TA2 SE TNK SOL TA1
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