Metos 4241001, Operating Instructions Manual, Page: 75 / 90

10
900-----rev00
6 • ELECTRICAL CONNECTIONS AND EQUIPOTENTIAL BONDING
6.1 • As this oven is a type X appliance (oven
without power cable and plug), the cable
and other hardware needed to make the
connection to the electrical power supply must
be provided by the installer. The cable must
satisfy the requirements indicated in table 1
“General data”. As already mentioned, the
oven must be connected to the power supply
by way of a multiple pole main isolating switch
ensuring a gap between open contacts of at
least 3 mm on each pole.
6.2 • To gain access to the AC mains connection
terminal board, the right hand panel of the
casing must be removed by undoing the fixing
screws (all models).
6.3 • The cable must be fed in from beneath the
clamp. The individual wires are then fastened
to the corresponding terminals of the terminal
board. The earth wire must be longer than the
other wires, so that in the event of the cable
being jerked or the clamp broken, the live
wires will disconnect first.
Check the efficiency of the isolating switch.
6.4 • The oven must be kept in an equipotential
system. This connection is made by wiring a
conductor of nominal cross section 10 mm
2
to
the corresponding terminal at the back of the
oven, which is marked with the internationally
recognized symbol.
All appliances in the room are bonded in this
way and connected to the earth system of the
building.
6.5 • The electrical safety of this appliance can be
guaranteed only when it is connected correctly
to an efficient earth system, in compliance with
current standards.
7.1 • As all ovens of the series are fitted with
an alternating fan motor (clockwise and
anticlockwise rotation), there is no need
for the fan to rotate in any particular
d i r e c t i o n . S i m p l y v e r i f y , w h e n
c o m m i s s i o n i n g t h e a p p l i a n c e , t h a t
the fan is balanced and rotates freely.
Warning: the 20 x GN 1/1 and 20 x GN 2/1
models are equipped with two motors.
7.2 • When making the electrical connection you
need to take care that the neutral pin of the
terminal block corresponds to the neutral
wire of the supply line. If this connection is
not made correctly, the burners will not be
able to operate.
7.3 • This trouble is indicated:
On gas models mechanical version by the
burner ignition reset button, which is lit up.
On gas models electronic version via the
electronic card.
7.4 • Check also that the neutral registers zero
potential when tested. If not, the fault already
described in point three of this section will
occur. In this eventuality, consult the installer
of the building’s electrical system.
7 • POINTS TO REMEMBER WHEN MAKING THE ELECTRICAL CONNECTION