Beretta Power Plus Box 1002 P INT, Руководство по установке, Страница: 12 / 44

12
6 ELECTRICAL SYSTEM
6 .1 Power supply
A detailed wiring diagram of the heating unit is shown in
caption 11, 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 workman-
ship 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.
b
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 ac-
cessories.
The Figure 17 is shown the terminal of the master board,
with the connections to different external devices.
b
Always check the effectiveness of the electricity
earthing system, compulsory for the appliance and
used for connecting up to the heating unit. The elec-
tronics could in fact put the entire heating unit into
safety shutdown should the latter not be compatible.
b
Make sure that the water and heating pipes have not
been used as earths for the electrical installation.
They are absolutely unsuited for this usage.
Wiring at a voltage of 230 V must be separated from those
at a voltage of 24V, using raceways or separate PVC tubes.
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 con-
nect up the external electrical components, which must be
installed on a special electrical board externally.
This solution also enables circulators, valves, etc. to func-
tion in emergency mode, i.e. should the boiler master board
not be serviceable.
a
Do not touch the electrical apparatus with parts of the
body wet or damp or with bare feet.
a
Do not leave the appliance exposed to atmospheric
agents (rain, sun, wind, etc.) unless it is the special
model for out of doors.
a
It is forbidden to pull, detach, twist the wiring coming
out of the heating unit, even if unplugged from the
power supply.
a
Do not allow people without experience to use the
appliance and switch off the heating unit if the pow-
er cable should break; call in qualified personnel to
replace it.
Always refer to the data given in the diagrams in this hand-
book for operations of an electrical nature.
Remember that
B
is not to be held liable for any dam-
ages caused by ignoring the information given in the wiring
diagrams of this manual.
a
Never turn off the boiler while it is functioning nor-
mally (with burner ignited) suddenly cutting off the
power supply with the on-off switch. This could cause
abnormal overheating in the primary exchanger. Use
a room thermostat or remote control to turn off (whilst
heating system is on).
6 .2 Electrical connections
b
Qualified personnel only may work on the electrical
system and in compliance to provisions of the law,
with particular attention to rules on safety.
a
Lock the cables in their cable clamp designed to en-
sure the latter are always in the correct position inside
the appliance.
6 .2 .1 Connection to mains
When installing a single
Power Plus Box P INT-EXT
Series
the connection must be made in accordance with cur-
rent 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 protected against mois-
ture, abrasions and incidental contact.
The power cord is to be connected to the switch, located
behind the boiler control panel. To access the switch, re-
move the protective sheet metal by removing the screws
connecting. The protective conductor (earth) terminal is to
be connected to the general earth strip next to the switch.
Fix the cable by its cable clamp and supplied anchorages
to ensure it is correctly in place inside the appliance and
to prevent it from coming into contact with parts at high
temperatures (burner, etc.).
b
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.
b
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 contact between cable and frame
equipment. To pass a cable is sufficient to drill the
cableguides.