18
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 malfunconing due to electrical noise. It
is advisable to use separate tubes for them.
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 malfuncons or failures. It is necessary to respect the polaries L-N (Live L=brown; - Neu-
tral N=blue) - otherwise the boiler may not work - and the earth connecon (yellow-green cable).
Place upstream the boiler a bipolar switch in compliance with the regulaon currently in force.
The installaon must be made complying the regulaon currently in force and generally with the
standard cra rules.
For the general electrical supply of the appliance the bipolar switch should be used. The use of adaptors,
mulple 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
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 connecng 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 ecient earth-
ing system, executed as indicated by the safety rules actually in force.
A qualied technician must check that the electrical system is in line with the maximum power allowed
by the boiler, indicated on the data plate, with parcular aenon to the cables secon.
ITALTHERM S.r.l. declines any responsibility for damages to persons, animals or things caused by
the faulty or missing connecon of the boiler earthing and by failure to comply with the rules.
Carefully follow the prescripons by the Naonal and Local Regulaon in force.
Indicaons to connect the duct to the chimney (except of dierent prescripons by Naonal or Local
Regulaon):
f Don't lean the ue pipe into the chimney, but stop it before the inner surface of the chimney. The
axis of the ue pipe must intersect the axis of the chimney or of the ue duct.
f On the boiler ue outlet, there must be a vercal ue pipe which length must be at least two mes
the diameter of the pipe itself, measured on the pipe connecon on the boiler.
f Aer the vercal length, the pipe must have a minimum upwards slope of 5% and a maximum length
of 2500 mm.
f The boiler has been tested with a 1 meter chimney length.
f To calculate the chimney dimensions, refer to the Flue Mass Flow Rate and to the Flue Temperature
data (see "Technical data" on page 34).
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