44
7.3 Outdoor Unit Wiring
Perform the wiring connection as per the following:
(1) Connect three-phase electric power wire to the terminal L1, L2, L3, and N (380V) of the block and
connect the ground wire to the ground terminal in the electrical box.
(2) Connect the communication cable between the indoor and the outdoor unit to terminals 1 and 2 of
the terminal block TB2 on the PCB3. The communication wires between the outdoor units of the
same refrigerant system are connected to terminals 3 and 4 of the terminal block TB2 on the PCB3.
(3) Fasten the screws on the terminal block according to the following table:
Required Tightening Torque
Size
Tightening Torque
M4
1.0 ~ 1.3 N ● m
M5
2.0 ~ 2.4 N ● m
M6
4.0 ~ 5.0 N ● m
M8
9.0 ~ 11.0 N ● m
M10
18.0 ~ 23.0 N ● m
Communication
terminal
Indoor unit - outdoor unit(Add magnet ring
which is winded with 3 loops by communcation wire)
outdoor unit - outdoor unit
communication wire
Cable ties (for fixing
communication wires)
Ground
terminal
Grounding
screw
Cable clamp
(fixing power wire)
For power wire
Ø65 knockout hole
For communication wire
Ø33 knockout hole
TB2
1
3
2
4
Install insulation
sleeve
Ground
terminal
Grounding
wire
Cable
clamp
Indoor unit
- outdoor unit
Outdoor unit
- outdoor unit
Grounded
Shield
Grounded
Shield
Grounded
shield
Outdoor unit
communication
shielded
wire
PCB3
Indoor unit to
outdoor unit
Communication
shielded wire
Communication
wire
Tie
8-12HP
For communication wire
Ø52 knockout hole
