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15 Electrical installation
▪ The wiring for the other systems must be connected to the F1/F2
(Out-Out) terminals of the PCB in the outdoor unit to which the
interconnecting wiring for the indoor units is connected.
▪ The base unit is the outdoor unit to which the interconnecting
wiring for the indoor units is connected.
15.6
To finish the transmission wiring
After installing the transmission wires inside the unit, wrap them
along with the on-site refrigerant pipes using finishing tape, as
shown in figure below.
c
f
b
d
f
a
e
f
a
Liquid pipe
b
Gas pipe
c
Finishing tape
d
High pressure/low pressure gas pipe
e
Transmission wiring (F1/F2)
f
Insulator
15.7
To route and fix the power supply
NOTICE
When routing earth wires, secure clearance of 25 mm or
more away from compressor lead wires. Failure to observe
this instruction properly may adversely affect correct
operation of other units connected to the same earth.
The power supply wiring can be routed from the front and left side.
Fix it to the lower mounting hole.
5~12 HP
X1M
A
c
b
a
A
a
Power supply (possibility 1)
b
Power supply (possibility 2)
c
Power supply (possibility 3)
d
Tie wrap
(a)
Knockout hole has to be removed. Close the hole to avoid
small animals or dirt from entering.
Installation and operation manual
34
14~20 HP
X1M
d
d
A
d
c
b
a
(a)
(a)
(a)
. Use conduit.
15.8
To connect the power supply
The power supply MUST be clamped to the plastic bracket using
field supplied clamp material to prevent external force being applied
to the terminal. The green and yellow striped wire MUST be used for
earthing only.
5~12 HP
a
c
b
d
14~20 HP
a
c
b
d
a
Power supply (380~415 V, 3N~ 50 Hz)
b
Fuse
c
Earth leakage protector
d
Earth wire
e
Power supply terminal block
f
Connect each power wire: RED to L1, WHT to L2, BLK to
L3 and BLU to N
g
Earth wire (GRN/YLW)
h
Tie wrap
i
Cup washer
j
When connecting the earth wire, it is recommended to
perform curling.
Multiple outdoor units
d
To connect the power supply for multiple outdoor units to each other,
ring tongues have to be used. No bare cable can be used.
In that case, the ring washer that is installed by default should be
removed.
Attach both cables to the power supply terminal as indicated below:
L1 L2 L2 N
d
15.9
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
≥1 MΩ
<1 MΩ
Then
Insulation resistance is OK. This procedure
is finished.
Insulation resistance is not OK. Go to the
next step.
REYQ8~20+REMQ5U7Y1B
VRV IV+ heat recovery
4P546222-1B – 2020.10
e
f
g
i
j
h
e
f
g
i
j
h
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