Wiring Diagrams - Beretta 750 Instrucciones Para El Usuario

INSTALLATION
− Secure the heating element cover (9) with the screws (3)
and insert the knob (8) for thermostat setting
− Use the cover opening (C) to make the heating element
power wiring come out as shown in the figure.
C
When the installation is complete, set up the boiler as shown in
paragraph "Putting into service"

6 WIRING DIAGRAMS

SINGLE-PHASE HEATING ELEMENT WIRING DIAGRAM
9
3
8
3
A Safety thermostat contacts (95°C)
B Setting thermostat contacts (30÷70°C)
THREE-PHASE HEATING ELEMENT WIRING DIAGRAM
L1
L2
L3
A Safety thermostat contacts (98°C)
B Setting thermostat contacts (9÷75°C)
9
The following is mandatory:
− The use of a differential magneto-thermal circuit breaker
and a disconnecting switch compliant with the prevailing
IEC-EN standards (contact opening of at least 3 mm)
− Respect the connection L (line) - N (neutral). Keep the
earth conductor 2 cm longer than the power supply con-
ductors
− With regard to the boiler heating element power, use ca-
bles with section not less than 1.5 mm
terminal lugs;
− Refer to the wiring diagrams in this manual for all electric
operations
− Connect the device to an efficient earth system.
0
It is forbidden to use water pipes to earth the device.
0
It is forbidden to lay the power supply cables in the vicin-
ity of any hot surfaces (delivery pipes). If there is a risk of
contact with hot parts, with temperatures exceeding 50°C, a
suitable type of cable must be utilized.
The manufacturer is not to be held responsible in case of dam-
ages caused by failure to earth the device or failure to comply
with what indicated in the wiring diagrams.
15
N L
A
B
A B
INSTALLATION
, complete with
2