Green Heating Technology
20
Electrical connections
The link of the room thermostat works with a safety extra low voltage (SELV); connect it to
the voltage free contacts of the room thermostat/chronothermostat�
On NO account must any
electrical voltage be applied
to these terminals�
All low-voltage wirings (e.g. Room Thermostat or Chronothermostat for trade) must be kept
separate from power supply cables, as to avoid boiler malfunctioning due to electrical noise. It
is advisable to use separate tubes for them.
During the connection of cables from the boiler, make sure that them are not tight and make a
slack that allows the control panel to be fully tilted.
The boiler must be connected to a 220÷240V - 50Hz electrical power supply. In any case, the power
supply voltage must be within the range –15% ... +10% from the nominal value (230V); otherwise it
may cause malfunctions or failures. It is necessary to respect the polarities L-N (Live L=brown; - Neu
-
tral N=blue) - otherwise the boiler may not work - and the earth connection (yellow-green cable).
Place upstream the boiler a bipolar switch
in compliance with the regulation currently in force.
The installation must be made complying the regulation currently in force and generally with the
standard craft rules.
For the general electrical supply of the appliance the bipolar switch should be used. The use of adaptors,
multiple taps and extensions is not allowed.
If the supply cable must be replaced, use one of the following cable types: H05VVF or H05-VVH2-F.
It is
mandatory the earth connection in accordance with the rules actually in force.
To replace the cable,
open the control panel cover, unlock its fastening device and disconnect it from the terminals.
Install
the new cable proceeding in the reverse way. When connecting the cable to the boiler, it’s mandatory:
• to leave the Earth wire about 2 cm longer than the other (Live and Neutral) wires;
• to lock the cable upstream the terminals by means of the suitable fastening device.
Electrical safety of the appliance is only achieved when it is well connected to an efficient earth
-
ing system, executed as indicated by the safety rules actually in force.
A qualified technician must check that the electrical system is in line with the maximum power allowed
by the boiler, indicated on the data plate, with particular attention to the cables section.
ITALTHERM S.r.l. declines any responsibility for damages to persons, animals or things caused by
the faulty or missing connection of the boiler earthing and by failure to comply with the rules.
