Wiring; 4-Way Cassette Chassis - LG ARNU073TUC4 Instruction Manual

DANGER
High voltage electricity is required to operate this system. Adhere to the National Electrical
Codes and these instructions when wiring. Always ground the unit following local, state, and
National Electrical Codes. Read the safety summary at the beginning of this manual.
Cable Connections
1. Ensure the input power is discon-
nected and there is no power on the
power input cable.
2. Refer to Figure 19 and route the
power and outdoor unit communica-
tions cables into the chassis. Do
not route the communications cable
near the power cable.
3. Secure the power cable to the 1(L1)
and 2(L2) terminal block connections as
shown in Figure 20.
4. Connect the field-provided outdoor unit
communications cable to the . This cable
must be 18-2, stranded, shielded, and
meet all applicable codes. Polarity mat-
ters on this IDU to ODU communications
bus. Be sure to connect A terminals to
A terminals and B terminals to B termi-
nals. Ensure the communication cable is
properly grounded at the master outdoor
unit only. Do not ground this IDU to ODU
communications cable at any other point.
5. Connect the cable from the remote (wall)
controller to the unit's remote control
connection. On some units this cable
connects to a pigtail cable from the CN-
REMO connector on the control board
and on some units it connects directly to the
CN-REMO connector.
6. Refer to the cable
connection diagram in
Figure 21 and connect
any additional cables
required for your
installation.
Power
Cables
Power cable
TR/TQ Chassis
IDU Terminal Block
1(L1) 2(L2) 3(A) 4(B)
Power Input
TM/TN/TP Chassis
IDU Terminal
IDU Terminal Block
Block
1(L1) 2(L2)
3(A) 4(B)
Power Input
Fresh Air Kit
Due to our policy of continuous product innovation, some specifications may change without notification.
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Figure 19: Typical 4-Way Cassette Cable Routing
Figure 20: Typical 4-Way Cassette Cable Connections
Figure 21: 4-Way Cassette Cable Connections
SODU
B
IDU to ODU Communication Connections
IDU Terminal Block
SODU
RD YL BK 5(A) 5(B) B
Wall Controller IDU to ODU Communication Connections
(Optional)

WIRING

4-Way Cassette Chassis

1(L1) 2(L2) 3(A) 4(B)
Power Supply
High Voltage 208/230V
Wall Controller
Lock nut
(Optional)
Conduit
mounting
Conduit
plate
Outdoor Unit
IDU INTERNET DRY1 DRY2
A B A B A
—
Outdoor Unit
IDU INTERNET DRY1 DRY2
A B A B A
—
Control
Cables
Cable
GND
12V
— — —
GND
12V
— — —
35