Ferroli OPERA 70 Instructions D'utilisation, D'installation Et D'entretien page 167

OPERA
2.4 Gas connection
B
Before making the connection, make sure the unit is arranged for operation with
the type of fuel available and carefully clean all the pipes of the gas system to re-
move any residues that could affect proper functioning of the boiler.
The gas must be connected to the relevant connection (see fig. 74, fig. 77, fig. 80, fig. 81 and fig. 84) in conformity with
the current regulations, using a continuous-surface stainless steel hose, placing a gas cock between the system and
the boiler.
To allow easy opening of the burner door during periodic maintenance, the last section of the connec-
A
tion between the system and the unit must have a continuous-surface stainless steel hose.
Make sure that all gas connections are tight. The capacity of the gas meter must be sufficient for the simultaneous use
of all units connected to it. The diameter of the gas pipe leaving the boiler is not decisive for choosing the diameter of
the pipe between the unit and the meter; it must be chosen according to its length and pressure losses, in conformity
with the current regulations.
B
Do not use the gas pipes to earth electrical appliances.
In case of connection in cascade, make sure to install a fuel shutoff valve externally
with respect to the modules.
2.5 Electrical connections
Connection to the electrical grid
B
The unit's electrical safety is only guaranteed when correctly connected to an effi-
cient earthing system executed according to current safety standards. Have the
efficiency and suitability of the earthing system checked by professionally qualified
personnel. The manufacturer is not responsible for any damage caused by failure
to earth the system. Also make sure that the electrical system is adequate for the
maximum power absorbed by the unit, as specified on the boiler dataplate.
The boiler is prewired and provided with a Y-cable and plug for connection to the electricity line. The connections to the
grid must be made with a permanent connection and equipped with a bipolar switch whose contacts have a minimum
opening of at least 3 mm, interposing fuses of max. 3A between the boiler and the line. It is important to respect the
polarities (LINE: brown wire / NEUTRAL: blue wire / EARTH: yellow-green wire) in making connections to the electrical
line. During installation or when changing the power cable, the earth wire must be left 2 cm longer than the others.
EN
fig. 53
cod. 3541R964 - Rev. 01 - 02/2022
167