2 .11 .4 Cable section and protection rating
The cable sections are given for information purposes only and do not exempt the installer from checking that these
sections correspond to the requirements and comply with the prevailing standards.
• Power supply to outdoor unit
Heat pump (single phase)
Electricity supply 230 V - 50 Hz
Model
Maxi. power absorbed
Cable connection
(phase, neutral, earth)
Curve D circuit breaker size
excellia duo 11 Single phase
5060 W
3 x 6 mm²
32 A
excellia duo 14 Single phase
5750 W
Heat pump (3-phase)
Electricity supply 400 V - 50 Hz
Model
Maxi. power absorbed
Cable connection
(3 phases, neutral, earth)
Curve D circuit breaker size
excellia duo 11 3-phase
5865 W
5 x 2,5 mm²
20 A
excellia duo 14 3-phase
6555 W
excellia duo 16 3-phase
7245 W
• Interconnection between the outdoor unit and the hydraulic unit:
The hydraulic unit is powered by the outdoor
unit by means of a cable with 4 x 1,5 mm² (phase, neutral, earth, communication bus).
• Electricity supply DHW:
The DHW section is powered directly via a 3 x 1,5 mm² cable (phase, neutral, earth).
Protection by circuit breaker (16 A, curve C).
• Power supply to the electrical back-ups (option)
The hydraulic unit contains two stages of electrical back-ups installed in a heat exchange tank.
Heat pump (HP)
Electrical back-ups
Power supply to the electrical back-ups
Model
Power
Nominal current
Cable connection
Curve C circuit
breaker size
excellia duo Single phase
2 x 3 kW
26,1 A
3 x 6 mm²
32 A
excellia duo 3-phase
9 kW
3 x 13 A
4 x 2,5 mm²
20 A
figure 31 - Overall layout of the electrical connections for a simple installation (1 heating circuit)
"
Ensure that the general electrical power supply has been cut off before starting any repair work.
2 .11 .3
Overview of all the electrical connections
The wiring diagram for the hydraulic unit is shown in detail on
figure 50, page 60
Outdoor sensor
Cable 2 x 0,75 mm²
Interconnection between
the outdoor unit and the hydraulic unit :
Phase, Neutral, Earth, Communication bus
Cable 4 x 1,5 mm²
Room control unit T78 (option)
Room thermostat T58 (option)
Room control unit T75 (option)
Cable 3 x 0,5 mm²
Room thermostat T55 (option)
Cable 2 x 0,5 mm²
Room thermostat T37 (option)
Cable 3 x 0,5 mm²
Power supply to the electrical back-ups
(Phase, Neutral, Earth) Cable 3 x 6 mm²
DHW power supply
(Phase, Neutral, Earth)
Cable 3 x 1,5 mm²
General electrical supply (Phase, Neutral, Earth)
(depending on heat pump power)
Electric
panel
or
or
or
or
Installation and operating manual "1572 - EN"
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Heat pump air/water split 2 services alféa excellia duo