15 Electrical installation
Installation and operation manual
28
RK RKXYQ8T7Y1B
VRV IV compressor unit for indoor installation
4P499900-1A – 2020.10
Branches
No branching is allowed after branching.
D
B
C
b2
b3
c1
c2
b1
a
A
A
Central user interface (etc...)
B
Compressor unit
C
Indoor unit
D
Heat exchanger unit
a
Main line. The main line is the line to which the
transmission wiring of the heat exchanger unit is
connected.
b1, b2, b3
Branch lines
c1, c2
No branch is allowed after branch
15.4
To connect the electrical wiring on
the compressor unit
NOTICE
▪ Follow the wiring diagram (delivered with the unit,
located on the switch box cover).
▪ Make sure the electrical wiring does NOT obstruct
proper reattachment of the service cover.
1
Remove the service covers of the compressor unit and the
switch box.
2
Connect the transmission wiring as follows:
F1 F2
F1 F2
F1 F2
F1 F2
F1 F2
F1 F2
F1 F2
F1 F2
F1 F2
b
X2M
X2M
X2M
X1M (A1P)
RKXYQ5
RDXYQ5
TO OUT/D
TO IN/D
F1 F2
F1 F2
a1
a2
a2
a
F1 F2
F1 F2
F1 F2
F1 F2
F1 F2
F1 F2
F1 F2
F1 F2
F1 F2
b
a
RKXYQ8
RDXYQ8
TO OUT/D
TO IN/D
F1 F2
F1 F2
8 HP
5 HP
a
Sh shielded cable (2 wires) (no polarity)
a1, a2
Connection of shield to earth
b
Terminal board (field supply)
NOTICE
Shielded cable.
Using shielded cable for the transmission
wiring is mandatory for 5 HP, and optional for 8 HP.
X2M
F1F2
F1F2
a1
X1M
X1M (A1P)
5 HP
8 HP
X2M
a2
F1
F2
X2M
a2
F1
F2
RKXYQ5
RDXYQ5
RKXYQ8
RDXYQ8
a1, a2
Earth (use the screw delivered as accessory)
When using shielded cable:
▪ In case of 5 HP (
a1
and
a2
): Connect the shield to the
earth of the compressor unit and the heat exchanger
unit.
▪ In case of 8 HP (only
a2
): Connect the shield only to
the earth of the heat exchanger unit.
3
Connect the power supply as follows:
3N~ 50 Hz
380-415 V
L1 L2 L3
L1 L2 L3
N
X1M
a
b
c
a
Earth leakage circuit breaker
b
Fuse
c
Power supply cable
4
Route the wiring through the frame, and fix the cables (power
supply and transmission wiring) with cable ties.
INFORMATION
To make routing the wiring easier, you can turn the switch
box horizontally by loosening the screw on the left side of
the switch box.
1×
c
≥50 mm
a
b
b
X1M
L1
F1F2
L2 L3 N
c
a
c
X2M
A1P
b
a
X1M X2M
5 HP