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Warning
Electric shocks can cause serious injuries and even death. The electrical connections must be made by qualifi ed technical
personnel. Carry out grounding before proceeding with other electrical connections.
External unit electrical connections
The electrical panel of the outdoor unit is located at the front of the form, after removing the front panel.
The power cable can be connected to the terminal block shown in the fi gure, using a core hitch. If the hole on the unit is not
large enough, make it bigger.
Check that the fastening of the power supply cable and the connecting cable between HYBRID MODULE and external unit are
properly secured using a cable locking device, freely commercially available, in order to ensure that no contact occurs between
the cables and hot piping. This block must also ensure good tensile strength.
1. Power
supply
connection
terminal
block
2. Power supply cable
3. Ground
connection
4. BUS
onnection
5. Electrical
panel
L
L
L
N
L N
B T
BUF
4
5
1
2
3
3
2
30mA
T
N
XXA*
ON
OFF
N
2A
N
2A
N
N L L
N L
PM AUX
AUX 1
OUT
OUT
AUX 2
V 1
V 2
ST 1
HV
IN 3
HV
IN 1
HV
IN 2
L
N
N
L
1Ph
3Ph
3G 0.75mm
2
3G 0
.75mm
2
WARNING
After carrying out the connections between the indoor and outdoor unit, put back both panels of the respective units.
NOTE
It is strongly recommended to verify the presence of a surge protection device (SPD) on main power line and of circuit breakers
connected to the external and internal unit’s control box
* See table of electrical connections