25
The connection to the gas supply must be carried out by professionally quali
fi
ed personnel in
accordance with relevant standards:
When connecting the boiler to the gas supply pipe, only use appropriate washers and gas
fi
t-
tings. The use of hemp, Te
fl
on tape and similar materials is not allowed.
Before installing the boiler, check the following:
■
The pipe work must have a section appropriate for the
fl
ow rates requested and the pipe lengths installed, and
must be
fi
tted with all the safety and control devices provided for by current standards.
■
The gas supply line must be a minimum of a 22 mm diameter pipe with an uninterrupted supply from meter to
boiler and comply with current standards and regulations.
■
Check the internal and external seals of the gas supply system.
■
A gas shut-off valve must be installed upstream of the appliance
■
The gas pipe work must have and bigger or equal section to the one of the boiler.
■
Before starting up the boiler, make sure that the type of gas corresponds to that for which the appliance has
been set-up (see gas type label inside the boiler).
■
The gas supply pressure must be between the values reported on the rating plate (see gas type label inside the
boiler).
■
Prior to installation, it is good practice to ensure that there are no machining residues on the gas supply pipe.
■
Conversion of the appliance from natural gas to LPG or vice versa must be carried out by authorised service
personnel.
4.6 Gas Connection
4.7 Electrical Connections
The connection to the mains power supply must be carried out by professionally quali
fi
ed per-
sonnel, registered in accordance with current legislation.
Always check to make sure that the appliance has an ef
fi
cient earth system. This requirement is
only satis
fi
ed if it has been properly connected to an ef
fi
cient earth system installed in accord-
ance with the requirements of current safety standards and carried out by professionally quali
fi
ed
personnel.
This basic safety measure must be checked, veri
fi
ed and carried out by professionally quali
fi
ed person-
nel. In case of doubt, have the electrical system checked by a quali
fi
ed electrician. The manufacturer
will not be held liable for any damage or injury caused as a result of an inef
fi
cient or inexistent earth
system;
■
The boiler functions with an alternating current of 230 V and 50 Hz and has maximum power absorption
of 133 W for SRD 20, 138 W for SRD 27/36.
The appliance should be protected by a 3 A fuse.
The
connection to the mains electricity supply must be via a single-pole switch, with at least 3 millimetres gap
between open contacts, mounted upstream of the appliance. Make sure that the positions of the live and
neutral wires correspond to the wiring diagram;
■
Ensure the domestic power supply is checked by a quali
fi
ed electrician to ensure that it can support the
maximum power absorption of the appliance, as indicated on the rating plate. In particular, make sure that
the cable sizes are adequate for the power absorbed by the appliance;
■
The power supply cable must not be replaced by the user. if the cable is damaged in any way, switch off the
appliance and have the cable replaced by a suitably quali
fi
ed electrician;
■
When replacing the power supply cable, only use cables of the same characteristics (HO5 VV-F 3x1) with
maximum external Ø 8 mm;
When using an electrical appliance, a few fundamental rules must be observed:
●
Do not touch the appliance with damp or wet parts of the body or when barefoot.
●
Do not pull on the electric wires.
