18
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Electrical installation
Installer and user reference guide
100
R R8T7V1B
VRV IV heat pump for indoor installation
4P499898-1A – 2020.10
18.1.6 Safety device requirements
NOTICE
When using residual current operated circuit breakers, be sure to use a high-speed
type 300 mA rated residual operating current.
Power supply: Compressor unit
The power supply must be protected with the required safety devices, i.e. a main
switch, a slow blow fuse on each phase and an earth leakage protector in
accordance with the applicable legislation.
Selection and sizing of the wiring should be done in accordance with the applicable
legislation based on the information mentioned in the table below.
Model
Minimum circuit
ampacity
Recommended fuses
RKXYQ5
13.5 A
16 A
RKXYQ8
17.4 A
20 A
▪
Phase and frequency: 3N~ 50 Hz
▪
Voltage: 380-415 V
Power supply: Heat exchanger unit
The power supply must be protected with the required safety devices, i.e. a main
switch, a slow blow fuse on each phase and an earth leakage protector in
accordance with the applicable legislation.
Selection and sizing of the wiring should be done in accordance with the applicable
legislation based on the information mentioned in the table below.
Model
Minimum circuit
ampacity
Recommended fuses
RDXYQ5
4.6 A
10 A
RDXYQ8
7.0 A
10 A
▪
Phase and frequency: 1~ 50 Hz
▪
Voltage: 220-240 V
Transmission wiring
Transmission line section:
Transmission wiring
Sh shielded cable (2 wires)
Vinyl cords
0.75~1.25 mm²
(using shielded cable for the
transmission wiring is mandatory for
5 HP, and optional for 8 HP)
Maximum wiring length
(= distance between compressor unit
and furthest indoor unit)
300 m
