Table 1: Minimum And Maximum Wire Section (Per Phase) For Connection To Nxhp Units - Riello NXHP Series Installation, Operation And Maintenance Instructions

2 - INSTALLATION OF UNIT

Table 1: Minimum and maximum wire section (per phase) for connection to NXHP units

Max.
connectable
- Suspended aerial lines (standardised routing No. 17)
section
(1)
- XLPE insulated cable
NXHP
Section
mm²
(per phase)
004 (1Ph) 3G10²
006 (1Ph) 3G10²
008 (1Ph) 3G10²
3G10²
010 (1Ph)
3G10²
012 (1Ph)
3G10²
014 (1Ph)
012 (3Ph) 5G4²
014 (3Ph) 5G4²
Accessory Use cables H07RN-F 4x0,75 mm² up to 50m to connect the user interface WUI (not supplied with accessory)
Remote CAUTION: Use the grey ferrite which is supplied in accessory to clamp around the WUI cable. Please clamp it directly after
WUI the customer's terminal block
Notes:
(1) Connection capacities actually available for each machine, defined according to the connection terminal size, the control box access opening size and the available
space inside the control box.
(2) Selection simultation result considering the hypothesis indicated.
(3) If the maximum calculated section is for an XLPE cable type, this means that a selection based on a PVC cable type can exceed the connection capacity actually
available. Special attention must be given to the selection.
2.4.3 - Cable entry and installation
The power and customer control cables must be entered through the cable grommet from the rear panel of the unit as shown on the
following illustrations.
When a ferrite is provided as an accessory, it must be installed on the main power cable, inside the unit casing, as close as possible
from the cable entry.
Important: take care to avoid any contact with potential sharp edges and refrigerant piping when wiring the cables. Cables
must be attached in the locking system located next to the main terminal block.
Cable installation
4 - 10 kW
B
C
B
Main power supply
C
Customer external connection
28
Calculation favourable case:
Max. length for voltage
Section
(2)
drop <5%
mm²
m
(per phase)
3G2.5² 50
3G2.5² 40
3G4² 50
3G4² 40
3G4² 40
3G4² 40
5G1.5² 50
5G1.5² 50
12 - 14 kW
B
C
Calculation unfavourable case:
- Conductors in conduits or multi-conductor cables in
closed conduit (standardised routing No. 41)
- PVC insulated cable, if possible
Cable type Section
(2)
mm²
-
(per phase)
H07RNF 3G2.5²
H07RNF 3G4²
H07RNF 3G4²
H07RNF 3G6²
H07RNF 3G6²
H07RNF 3G6²
H07RNF 5G4²
H07RNF 5G4²
Cable entries
4 - 10 kW
c
b
a
a
Control cable entry
b Main power supply entry
c Additional control cable entry (if needed)
Max. length for voltage
Cable type
drop <5%
m
50 H07RNF
60 H07RNF
50 H07RNF
60 H07RNF
55 H07RNF
55 H07RNF
150 H07RNF
150 H07RNF
12 - 14 kW
c
b
a
(3)
-