73
Installation
EN
2.11.1 Electrical data
NXC 017
NXC 021
NXC 026
NXC 033
NXC 040
NXH 026
NXH 033
NXH 040
Electrical characteristics
Power supply
V/Ph/Hz
400/3/50+N
400/3/50
400/3/50+N
400/3/50
Allowed voltage range
V
340-460
360-440
340-460
360-440
Power supply circuit control
V
24V with internal transformer
Maximum inrush current (Un) *
A
75
95
118
118
176
118
118
176
Unit power factor
with rated capacity**
0.84
0.79
0.77
0.81
0.9
0.77
0.81
0.9
Maximum absorbed power **
kW
7.8
9.1
11
13.8
17.5
11
13.8
17.5
Power fuse current (gG type)
A
25
32
40
50
63
40
50
63
Power cables
sq.mm
5x2.5
5x2.5
5x4
5x4
1x16
5x4
5x4
1x16
External Circulation Pumps Maximum
Current
A
1.30
1.40
2.40
2.60
2.80
2.40
2.60
2.80
* Maximum instant inrush current (maximum compressor current with locked rotor).
** Power absorption, compressor and fans according to the limits of
operation of the unit (leaving water temperature 18°C, outdoor air temperature 41°C) and 400 V rated voltage (plate data).
• the power supply voltage corresponds to the nominal va-
lue +/- 10%, with a maximum phase imbalance of 3%;
• all of the power network disconnect devices must be
equipped with contact openings (4 mm) in order to allow
for complete disconnection, in accordance with the con-
ditions required for overvoltage class III.
It is mandatory to:
• have an omnipolar magneto-thermal circuit breaker and
a padlockable disconnecting switch compliant with the
IEC-EN Standards (contact opening of at least 4 mm), with
adequate breaking and differential protection, installed
near the equipment.
• Connect the device to a properly functioning earthing sy-
stem
• Make sure that the electrical power supply system is com-
pliant with the current national safety standards.
• Make sure that the power supply line impedance is consi-
stent with the unit's power consumption, as indicated on
the unit's data plate.
• For any electrical intervention, always refer to the wiring
diagrams contained within this booklet.
It is forbidden to use gas or water pipes to earth the device.
