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7.3
Electrical Wiring for Outdoor Unit
Connect the electrical wirings according to the following figure
(1) Connect the power supply wires to L1, L2, L3, and N (for 380-415V) for the three phase power source
on the terminal board TB1 and earth wire to the terminal in the electrical control box.
(2) Connect the transmission wires between the outdoor and indoor units to the TB2 terminals 1 and 2 on
the PCB1. As for the transmission wires between outdoor units in the same refrigerant cycle, connect
them to the TB2 terminals 3 and 4 on the PCB1.
(3)
Tighten screws for the terminal board according to the following table.
< Required Tightening Torque >
Size
M10
(4)
When installing the unit in Australia, connect the both ends of shielded twist pair cable (remote control
switch cable and transmission cable) to the earth as shown bellow.
Earth
Terminal Board for Transmission Wiring
Earth Wire
Plastic Band
Connection Hole of
Power Supply Wiring
38
Tightening Torque
M4
1.0 to 1.3 N-m
M5
2.0 to 2.4 N-m
M6
4.0 to 5.0 N-m
M8
9.0 to 11.0 N-m
18.0 to 23.0 N-m
Shield
Shielded Twist Pair Cable
Power Supply Wiring
Connection Hole of Transmission Wiring
Wires
Earth
Shielded Twist
Pair Cable for
Indoor Unit to
Outdoor Unit
Terminal Board
for Power Supply
Cord Band
Cord Clamp
(For fixing power supply cable)
Cord Clamp
(For Transmission Wiring)
Transmission Wiring
Connection Hole of
( 52)
Power Supply Wiring
PCB1
for I.U. to O.U.
for O.U. to O.U.
TB2
1 2
3 4
Harness
Earth Wire
Lifter
Shielded Twist Pair Cable
between Outdoor Units
Transmission
TB1
Earth Terminal
R
S
T
Mp
L1
L2
L3
N
Earth Wire
For Power Supply Wiring
52 (Knock-out Hole)
NOTE:
Seal hermetically the entry of
conduit pipe by using putty or etc.
(for Water Protection)
For Operation Wiring
26 (Knock-out Hole)
R
S
T
Mp
L1
L2
L3
N
TB1
Electrical Box
Attach
Insulation Sleeve.
Cord Band
(Accessory)
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