12
ELECTRICAL SYSTEM
6
ELECTRICAL SYSTEM
6.1
Power supply
A detailed wiring diagram of the heating unit is shown in “12
Wiring diagrams” page 31, at the diagram and technical data
section.
Installation of the heating unit requires connection to a 230V -
50Hz grid system and must be done with good workmanship in
conformity to the electrical regulatory provisions in force.
It is best to install a differential circuit-breaker switch along the
line supplying power to the boiler.
9
Adapters, multiple sockets, extensions to feed the appliance
are not allowed.
The thermal generator must always be connected to the “master
board” which contains the board that governs the system and
manages probes of the circuit, pumps and accessories.
The “Figure 11” is shown the terminal of the master board, with
the connections to different external devices.
9
Always check the effectiveness of the electricity earthing
system, compulsory for the appliance and used for con-
necting up to the heating unit. The electronics could in fact
put the entire heating unit into safety shutdown should the
latter not be compatible.
9
Make sure that the water and heating pipes have not been
used as earths for the electrical installation. They are abso-
lutely unsuited for this usage.
9
Wiring at a voltage of 230 V must be separated from those at
a voltage of 24V, using raceways or separate PVC tubes.
9
Make sure that the electrical features (volt, absorption,
starting current, etc.) of the external electrical components
(thermoregulators, solenoid valves, weather probes, etc.)
are compatible with the inlets and outlets available before
connecting them up.
Relays and/or ancillary contactors are to be used to connect up
the external electrical components, which must be installed on
a special electrical board externally.
This solution also enables circulators, valves, etc. to function in
emergency mode, i.e. should the boiler master board not be
serviceable.
0
Do not touch the electrical apparatus with parts of the body
wet or damp or with bare feet.
0
Do not leave the appliance exposed to atmospheric agents
(rain, sun, wind, etc.) unless it is the special model for out
of doors.
0
It is forbidden to pull, detach, twist the wiring coming out of
the heating unit, even if unplugged from the power supply.
9
Do not allow people without experience to use the appliance
and switch off the heating unit if the power cable should
break; call in qualified personnel to replace it. Always re-
fer to the data given in the diagrams in this handbook for
operations of an electrical nature. Remember that R is not
to be held liable for any damages caused by ignoring the
information given in the wiring diagrams of this manual.
0
Never turn off the boiler while it is functioning normally
(with burner ignited) suddenly cutting off the power supply
with the on-off switch. This could cause abnormal over-
heating in the primary exchanger. Use a room thermostat
or remote control to turn off (whilst heating system is on).
6.2
Electrical connections
9
Qualified personnel only may work on the electrical system
and in compliance to provisions of the law, with particular
attention to rules on safety.
0
Lock the cables in their cable clamp designed to ensure the
latter are always in the correct position inside the appliance.
6.2.1
Connection to mains
When installing a single Condexa Pro2 EVO Series the connection
must be made in accordance with current regulations regarding
electrical safety, using a multi sheathed cable H05 VV-F-3GI with
minimum section of the conductors of 1,5 mm
2
, suitably protect-
ed against moisture, abrasions and incidental contact.
The power cord must be connected to the terminal block on the
left side of the instrument panel.
Fix the cable by its cable clamp and supplied anchorages to en-
sure it is correctly in place inside the appliance and to prevent
it from coming into contact with parts at high temperatures
(burner, etc.).
9
The length of the grounding cord should be higher than
other conductors (phase, neutral). In case of disconnection
of the power cord the cables of the conductors are strained
before the grounding one
9
The rubber cableguides placed on the structure of the
equipment have not to be removed because their purpose
is to protect the cables from wear that occurs in direct con-
tact between cable and frame equipment. To pass a cable is
sufficient to drill the cableguides.
6.2.2
Connection to thermoregulators
Condexa Pro2 EVO heating units are equipped with an extreme-
ly versatile control and operating system, able to operate three
independent systems functioning at different temperatures. The
procedure for connecting up the output signal to the specific
points on the terminal board will be illustrated in the following
pages (see “Figure 11” ).
H05-VV-F type cables with minimum external diameter of 5mm
and adequate conductor section may be used for thermoregu-
lation and low voltage systems, being careful to fix the latter to
their cable guides.
