Ferroli OPERA 70 Instrucciones De Uso, Instalación Y Mantenimiento página 167

OPERA
B
The user must never change the unit's power cable. If the cable gets damaged,
switch off the unit and have it changed solely by professionally qualified personnel.
If changing the electric power cable, use solely "HAR H05 VV-F" 3x0.75 mm2 ca-
ble with a maximum outside diameter of 8 mm.
Room thermostat (optional)
B
CAUTION: The room thermostat must have clean contacts. CONNECTING 230 V.
TO THE TERMINALS OF THE ROOM THERMOSTAT WILL IRREPARABLY DA-
MAGE THE ELECTRONIC CARD.
When connecting a remote timer control or a timer switch, do not take the power
supply for these devices from their cut-out contacts. Their power supply must be
taken with a direct connection from the mains or with batteries, depending on the
kind of device.
External probe (optional)
Connect the probe to its respective terminals. The maximum permissible length of the boiler – external probe connection
electric cable is 50 m. A common 2-core cable can be used. The external probe should preferably be installed on the
North, North-West wall or on the wall with most of the main living room. The probe must never be exposed to the sun
in the early morning, and in general, as far as possible, it must not receive direct solar radiation; if necessary, it must
be protected. In any case, the probe must never be mounted near windows, doors, ventilation openings, flues or heat
sources that could affect the reading.
EN
fig. 54- Positioning of external probe not recommended
cod. 3541R963 - Rev. 00 - 09/2021
167