LG AMNW Series Installation Manual page 21

CAUTION
!
The power connecting cable between the
outdoor and indoor units must comply with
the following specifications: NRTL Recognized
(for example, UL or ETL recognized and CSA
certified).
AWG 18-4 is the minimum recommended
wire size, however, the selected conductors
must comply with local codes and be suitable
for installation in wet locations.
If the supply cord is damaged, it must be
replaced by a special cord or assembly
available from the manufacturer of its service
agent. When the connection line between the
indoor unit and outdooor unit and outdoor unit
is over 40m, connect the telecommunication
line and power line separately.
Precautions when laying power and
ground wiring
Use round pressure terminals for connections
to the power terminal block.
When laying ground wiring, you must use
round pressure terminals.
Round pressure terminal
When none are available, follow the
instructions below.
- Do not connect wiring of different
thicknesses to the power terminal block.
(Slack in the power wiring may cause
abnormal heat.)
- When connecting wiring which is the same
thickness, do as shown in the figure below.
Power wire (Ground wire)
- For wiring, use the designated power wire and
connect firmly, then secure to prevent outside
pressure being exerted on the terminal block.
- Use an appropriate screwdriver for tightening
the terinal screws. A screwdriver with a small
head will strip the head and make proper
tighterning impossible.
- Over-tightening the terminal screws may break
them.
!
NOTE
Use connection cable NRTL(UL, ETL, CAS...)
listed and stranded copper(4) THHN
conductors, sunlight (UV) resistant ROHS
compliant PVC jacket 600V direct burial listed,
approved for wet conditions. Temperature
rated for –20°C(-4°F) to 90°C(194°F). And this
cable should be enclosed in conduit.
!
WARNING
• Be sure to comply with local and national
codes while running the wire from the
indoor unit to the outdoor unit(size of wire
and wiring method, etc).
• Every wire must be connected firmly.
• No wire should be allowed to touch
refrigerant tubing, the compressor or any
moving parts.
• The communication wirings of air
conditioner should be separate and
isolated from external device's electric
wiring such as computers, elevator,
radio & Television broadcasting facilities,
as well as medical imaging offices.
INSTALLATION
21
different thicknesses.