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5.3 Wiring size and minimum requirements of the protection devices
!
CAUTION
• Check to ensure that the field supplied electrical components (mains power switches, circuit breakers, wires, connectors and wire
terminals) have been properly selected according to the electrical data indicated on this chapter and they comply with national and local
codes. If it is necessary, contact with your local authority in regards to standards, rules, regulations, etc.
• Use a dedicated power circuit for the indoor unit. Do not use a power circuit shared with the outdoor unit or any other appliance.
Use wires which are not lighter than the polychloroprene sheathed flexible cord (code designation 60245 EN 57).
Power
Model
supply
~ 230V
50Hz
3N~
400V
50Hz
Power
Model
supply
~ 230V
50Hz
3N~
400V
50Hz
Power
Model
supply
3N~
400V
50Hz
!
CAUTION
• Ensure specifically that there is an Earth Leakage Breaker (ELB)
installed for the units (outdoor and indoor unit).
EN
PMML0666 rev.0 - 09/2024 - 1000017439
Operation mode
Without electric heaters
With electric heater
With DHW tank heater
With electric and DHW
tank heaters
Without electric heaters
With electric heater
With DHW tank heater
With electric and DHW
tank heaters
Operation mode
Without electric heaters
With electric heater
With DHW tank heater
With electric and DHW
tank heaters
Without electric heaters
With electric heater
With DHW tank heater
With electric and DHW
tank heaters
Operation mode
Without electric heaters
With electric heater
With DHW tank heater
With electric and DHW
tank heaters
Power supply cables
Max
current
(A)
EN 60335-1
0.63
2 x 0.75 mm² + GND
13.67
2 x 2.5 mm² + GND
12.59
2 x 2.5 mm² + GND
25.63
2 x 6.0 mm² + GND
0.63
4 x 0.75 mm² + GND
4.96
4 x 2.5 mm² + GND
12.59
4 x 2.5 mm² + GND
16.92
4 x 6.0 mm² + GND
Power supply cables
Max
current
(A)
EN 60335-1
0.6
2 x 0.75 mm² + GND
26.7
2 x 6 mm² + GND
12.6
2 x 2.5 mm² + GND
38.7
2 x 10.0 mm² + GND
0.6
4 x 0.75 mm² + GND
9.1
4 x 2.5 mm² + GND
4.2
4 x 2.5 mm² + GND
12.9
4 x 6.0 mm² + GND
Power supply cables
Max
current
(A)
EN 60335-1
0.66
4 x 0.75 mm² + GND
13.7
4 x 4 mm² + GND
13.7
4 x 4 mm² + GND
26.7
4 x 10.0 mm² + GND
• If the installation is already equipped with an Earth Leakage
Breaker (ELB), ensure that its rated current is large enough to
hold the current of the units (outdoor and indoor unit).
ELB
Transmitting
CB
(nº of
cables
(A)
poles/A/
mA)
6
16
2/40/30
16
32
2 x 0.75 mm
2
6
10
4/40/30
16
20
ELB
Transmitting
CB
(nº of
cables
(A)
poles/A/
mA)
5
32
2/40/30
16
50
2/63/30
2 x 0.75 mm
2
5
15
4/40/30
15
25
ELB
Transmitting
CB
(nº of
cables
(A)
poles/A/
mA)
5
20
2 x 0.75 mm
4/40/30
2
20
30
6
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