16 Configuration
Installation and operation manual
28
RK RKXYQ8T7Y1B
VRV IV compressor unit for indoor installation
4P499900-1B – 2021.12
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
≥50 mm
a
b
b
a
X1M
X1M
A1P
X1M
b
a
c
c
8 HP
X1M (A1P)
c
a
Transmission wiring
b
Power supply
c
Cable tie
5
Reattach the service covers.
6
Connect an earth leakage circuit breaker and fuse to the power
supply line.
15.5
To check the insulation resistance
of the compressor
NOTICE
If, after installation, refrigerant accumulates in the
compressor, the insulation resistance over the poles can
drop, but if it is at least 1 MΩ, then the unit will not break
down.
▪ Use a 500 V mega-tester when measuring insulation.
▪ Do NOT use a mega-tester for low voltage circuits.
1
Measure the insulation resistance over the poles.
If
Then
≥1 MΩ
Insulation resistance is OK. This procedure
is finished.
<1 MΩ
Insulation resistance is not OK. Go to the
next step.
2
Turn ON the power and leave it on for 6 hours.
Result:
The compressor will heat up and evaporate any
refrigerant in the compressor.
3
Measure the insulation resistance again.
16
Configuration
INFORMATION
It is important that all information in this chapter is read
sequentially by the installer and that the system is
configured as applicable.
DANGER: RISK OF ELECTROCUTION
