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Example:
a
d
b
B
i
j
c
a
Field power supply (with earth leakage protector)
b
Main switch
c
Earth connection
d
Outdoor unit
e
Indoor unit
f
User interface
g
BS unit
h
Cool/heat selector
i
Circuit breaker
j
Fuse
Power supply 3N~ 50 Hz
Power supply 1~ 50 Hz
Earth wiring
15.4
To route and fix the transmission
wiring
Transmission wiring can be routed through the front side only. Fix it
to the upper mounting hole.
5~12 HP
A
b
a
A
a
Transmission wiring (possibility 1)
b
Transmission wiring (possibility 2)
with tie wraps.
c
Tie wrap. Fix to factory-mounted low voltage wiring.
d
Tie wrap.
(a)
Knockout hole has to be removed. Close the hole to avoid
small animals or dirt from entering.
REYQ8~20+REMQ5U7Y1B
VRV IV+ heat recovery
4P546222-1B – 2020.10
g
h
i
j
f
c
14~20 HP
c
c
c
d
A
b
a
(a)
(a)
. Fix to pipe insulation
5~12 HP
a
e
f
X1A
Fix to the indicated plastic brackets using field supplied clamping
material.
a
Wiring between the units (indoor-outdoor) (F1/F2 left)
b
Internal transmission wiring (Q1/Q2)
c
Plastic bracket
d
Field supplied clamps
15.5
To connect the transmission wiring
The wiring from the indoor units must be connected to the F1/F2
(In‑Out) terminals on the PCB in the outdoor unit.
c
Tightening torque for the transmission wiring terminal screws:
c
Screw size
M3.5 (A1P)
TO IN/D UNIT TO OUT/D UNIT TO MULTI UNIT
F1
F2
F1
F2 Q1Q2
d
a
A1P
F
F
F
F
Q
Q
1
2
1
2
1
2
e
g
a
Unit A (master outdoor unit)
b
Unit B (slave outdoor unit)
c
Unit C (slave outdoor unit)
d
Outdoor unit PCB (A1P)
e
Master/slave transmission (Q1/Q2)
f
Outdoor/indoor transmission (F1/F2)
g
Outdoor unit/other system transmission (F1/F2)
h
BS unit
i
Indoor unit
j
Cooling-only VRV indoor unit / Heating-only Hydrobox unit
INFORMATION
U-series units cannot share the same refrigerant circuit
with T-series units. However, electrically, U-series units
and T-series units can be connected via F1/F2.
▪ The interconnecting wiring between the outdoor units in the same
piping system must be connected to the Q1/Q2 (Out Multi)
terminals. Connecting the wires to the F1/F2 terminals results in
system malfunction.
15 Electrical installation
14~20 HP
b
a b
Tightening torque (N•m)
0.8~0.96
f
d
F1 F2 F1 F2
TO IN/D
TO OUT/D
UNIT
UNIT
h
b
c
A1P
A1P
Q
Q
Q
Q
1
2
1
2
F1 F2
F1 F2
i
e
Installation and operation manual
c
d
F1 F2 F1 F2
TO IN/D
TO OUT/D
UNIT
UNIT
h
F1 F2
F1 F2
i
j
F1 F2
F1 F2
33
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