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42 HWS
Electrical connections
Operating mode setting
Prior to making the electrical connections, set the switch
shown in the picture as follows:
• Position 1 for cooling only unit;
• Position 2 for heat pump unit.
In order to reset, in the event of incorrect switch positioning,
proceed as follows:
• Disconnect the power supply.
• Reposition the switch correctly.
• Connect the power supply.
The switch setting must correspond to the type of outdoor unit
(cooling only or heat pump) and the electrical connection.
Connect electrical wires to terminal box connectors in accordance
with the electric diagram and fasten down firmly.
Connect electrical wires to terminal box connectors in accordance
with the electric diagram and fasten down firmly.
Cooling only unit
IMPORTANT:
• Make ground connection prior to any other electrical
connections.
• First make the electric connection between the two units and
then the connection of the outdoor unit to the power supply.
• Make electrical connections between units prior to proceeding to
mains supply unit connection.
• Ensure that mains supply connection is made through a switch
that disconnects all poles, with contact gap of a least 3 mm.
• The mains supply connecting cable must be H07 RN-F (or higher)
type, while the indoor - outdoor unit interconnecting wires must be
A05 RN-F type (or higher), synthetic rubber insulation with
Neoprene coating, according to EN 60335-2-40 and HD277.S1
codes.
Heat pump unit
• Make ground connection prior to any other electrical
connections.
• Make electrical connections between units prior to proceeding to
mains supply unit connection.
• Ensure that mains supply connection is made through a switch
that disconnects all poles, with contact gap of a least 3 mm.
• The mains supply connecting cable must be H07 RN-F (or higher)
type, while the indoor - outdoor unit interconnecting wires must be
A05 RN-F type (or higher), synthetic rubber insulation with
Neoprene coating, according to EN 60335-2-40 and HD277.S1
codes.
Notes:
• Sizing of power supply wires and delay type fuses, refer to
the outdoor unit installation instructions.
• All field electrical connections are the responsibility of the
installer.
Connections wire minimum size between
indoor and outdoor units
Model
R
C
07
(2)
1.5
1.5
07
1.0
1.0
09
(2)
2.5
2.5
09
1.0
1.0
(2)
12
2.5
2.5
12
1.0
1.0
18
1.0
1.0
24
1.0
1.0
(1)
Heat Pump system only.
(2)
Mains supply connected to the indoor unit.
E N G L I S H
mm
2
(1)
(1)
(1)
Y
O
W2
S1
1.5 (1.0
(1)
)
1.0
1.0
0.75
1.0
1.0
1.0
0.75
2.5 (1.0
(1)
)
1.0
1.0
0.75
1.0
1.0
1.0
0.75
(1)
2.5 (1.0
)
1.0
1.0
0.75
1.0
1.0
1.0
0.75
1.0
1.0
1.0
0.75
1.0
1.0
1.0
0.75
(1)
S2
0.75
0.75
0.75
0.75
0.75
0.75
0.75
0.75
GB - 9
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