5.1 Cable dimensions and protection rating
These cable dimensions are provided for information purposes only and do not exempt the installer from checking
that these dimensions match requirements and comply with current standards.
• Outdoor Unit Power Supply
Heat Pump (HP) Electricity supply 230 V - 50 Hz
Model
Max. power
consumption
Connection cable
(phase, neutral, earth)
Circuit breaker
C curve
Alféa Extensa Duo A.I. 5 2530 W
3 x 1.5 mm² 16 A
Alféa Extensa Duo A.I. 6 2875 W
Alféa Extensa Duo A.I. 8 4025 W
3 x 2.5 mm² 20 A
Alféa Extensa Duo A.I. 10 4255 W
• Interconnection between outdoor unit and hydraulic unit
The hydraulic unit is powered by the outdoor unit by means of a 4 x 1.5 mm² cable
(phase, neutral, earth, communication bus).
• DHW power supply
The DHW section is powered directly via a 3 x 1.5 mm² cable (phase, neutral, earth).
Protection by circuit breaker (16 A, C curve).
• Electrical backup power supply
The hydraulic unit contains a electrical backup circuit (and a second optional) installed in the storage tank.
Heat pump Electrical backups Electrical backup power supply
Model Power Nominal current
Cable
(phase, neutral, earth)
Circuit breaker
C curve
Alféa Extensa Duo A.I.
5, 6, 8 and 10
3 kW 13 A 3 x 1.5 mm² 16 A
Alféa Extensa Duo A.I.
5, 6, 8 and 10
with 6 kW Backup
Relay Kit
2 x 3 kW 26.1 A 3 x 6 mm² 32 A
Installation and Operating Manual "1821- EN" - 37 -
Alféa Extensa Duo A.I. Heat Pump
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