Floor Standing Installation Manual

20 Air Conditioner
Wiring Connection
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 40 m, 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.
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.
- 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 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.
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.
WARNING
Loose wiring may cause the terminal to
overheat or result in unit malfunction.
A fire hazzard may also exist.
Therefore, be sure all wiring is tightly
connected.
!
NOTICE
!
!
GN/YL
20
mm
(25
/32
inch)
Round pressure terminal Power wire (Ground wire)