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Electrical installation
Installer and user reference guide
109
RXYLQ10~14T7Y1B*
VRV IV system air conditioner
4P543427-1A – 2020.10
Screw size
Tightening torque (N•m)
M3.5 (A1P)
0.8~0.96
In case of single outdoor unit installation
F
1
F
2
F
1
F
2
Q
1
Q
2
F1
F1
F2
F2 Q1 Q2
F1 F2
F1 F2
F1 F2
F1 F2
F1 F2
F1 F2
b
c
a
d
e
TO IN/D UNIT TO OUT/D UNIT TO MULTI UNIT
A1P
a
Outdoor unit PCB (A1P)
b
Use the conductor of sheathed wire (2 wire) (no polarity)
c
Terminal board (field supply)
d
Indoor unit
e
Outdoor unit
In case of multi outdoor unit installation
F1 F2 F1 F2 Q1 Q2
Q1 Q2
A1P
d
d
e
f
b
a
c
Q1 Q2
a
Unit A (master outdoor unit)
b
Unit B (slave outdoor unit)
c
Unit C (slave outdoor unit)
d
Master/slave transmission (Q1/Q2)
e
Outdoor/indoor transmission (F1/F2)
f
Outdoor unit/other system transmission (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.
▪
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.
19.4 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.
