22
External probe
connection (*)
- Predisposed on the terminal
board, terminals SE
Danger!
Only a qualied technician may per-
form the electrical installation.
Before performing connections or
The boiler is equipped with a power ca-
ble, boiler installation requires electric al
connection to the mains
power supply. This connection must be
made up to standard, as required the
regulations in force.
ON/OFF room
thermostat connection (*)
- Remove the jumper and con-
nect the room thermostat wires
between terminals TA 2.
- Connect the modulating thermostat
wire between terminals TA1/OT
after having removed the jumper.
ON/OFF room
thermostat connection
RT/OT (*)
Remember that a bipolar switch must be
installed on the boiler power line with over
3 mm between contacts, easy to access,
making maintenance quick and safe.
The power cable must be replaced by
UNICAL AG S.p.A. authorised techni-
cal staff, using original spare parts only.
Failure to comply with the above can
jeopardise the safety of the appliance.
Electric power supply connection
3.9 - ELECTRICAL CONNECTIONS
any type of operation on electrical parts, always
disconnect electrical power and make sure that
it cannot be reconnected accidentally.
See par. 4.5 positioning on the board
(*) Optional
NOTE!
Further details in the section
‘‘Technical Information’’ on the boiler
page of the www.unicalag.it website
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