Electrical Connections - Ariston CLAS HE R 12 Installation And Servicing Instructions

WARNING
Before performing any work on the boiler,
first disconnect it from the electrical power
supply using the external bipolar switch and
removing the fuse.

Electrical connections

For increased safety, ask a qualified technician to
perform a thorough check of the electrical system.
The manufacturer is not responsible for any damage
caused by the lack of a suitable earthing system or by
the malfunctioning of the electricity mains supply.
Make sure that the system is able to withstand the
maximum power absorbed by the boiler (this is
indicated on the appliance data plate). Check that
the section of the wires is suitable and is not less than
0.75 mm

The appliance must be connected to an efficient
earthing system if it is to operate correctly.
The power supply cable must be connected to a
30V-50Hz network, where the L-N poles and the
earth connection are all respected.
Important!
In the event that the power supply cable must
be changed, replace it with one with the same
specifications.
Power supply cable
140
Important!
The appliance is supplied with a fly-lead
already connected, this must be connected
to a 240V supply fused at 3 Amp and must
facilitate complete electrical isolation of
the appliance, by use of a fused double
pole isolator having a contact separation
of at least 3mm in all poles or alternatively
by means of a 3A fused three pin plug and
unswitched shuttered socket outlet both
complying with BS1363.
The use of multiplugs, extension leads or adaptors is
strictly prohibited.
It is strictly forbidden to use the piping from the
hydraulic, heating and gas systems for the appliance
earthing connection.
120
H05V2V2-F
Electrical connection unit
To access the electrical connection unit carry out the
following steps:
- Disconnect the boiler from the power supply
- Loosen the screws on the cover of the outside
connection box below the boiler (see diagram
below)
- Open the cover
- The connection PCB may be accessed in order to
connect :
Main supply
Live to pump
Zone valves
Outdoor sensor
Switched live connection/s
Cylinder stat
Caution!
For the connection and positioning of the
wires belonging to optional peripheral
units, please refer to the installation manu-
als of these units.
installation
9