Concealed Duct Installation Manual

INSTALLATION
ENGLISH
23
WARNING
!
Precautions when laying power and
ground wiring
- 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.
Use round pressure terminals for connections
to the power terminal block.
When laying ground wiring, you must use
round pressure terminals.
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.
Round pressure terminal Power wire (Ground wire)
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 40 m, connect the telecommunication
line and power line separately.
NOTE
!
Use connection cable NRTL(UL, ETL, CAS…)
listed and stranded copper(4) THHN
conductors, sunlight (UV) resistant ROHS
compliant PVC jacket 600 V 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.
• 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.
CAUTION
!
GN/YL
20 mm
(25/32 inch)