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Indoor Unit Outdoor Unit
Terminal
Power supply
Terminal
Single-phase 50Hz
220 to 240VAC
3
2
1
3
2
4
1
(A)
(B)
(C)
Grounding line
Grounding line
WARNING
7-2. Recommended Wire Length and Diameter
Regulations on wiring diameter differ from locality to locality. For field wiring requirements, please refer to your
local electrical codes. Carefully observe these regulations when carrying out the installation.
Table 2 lists recommended wire lengths and diameters for power supply systems.
Refer to the wiring system diagram (Fig. 6) for the meaning of (A), (B) and (C) in Table 2.
Be sure to comply with local codes on running the
wire from the indoor unit to the outdoor unit (size of
wire and wiring method, etc.).
Each wire must be firmly connected.
No wire should be allowed to touch refrigerant tubing,
the compressor, or any moving part.
Be sure to connect the power supply line to the indoor
unit as shown in the wiring diagram. The outdoor unit
draws its power from the indoor unit.
Do not run wiring for antenna, signal, or power lines of
television, radio, stereo, telephone, security system,
or intercom any closer than 1 meter from the power
cable and wires between the indoor and outdoor units.
Electrical noise may affect the operation.
To avoid the risk of electrical shock, each air
conditioner unit must be grounded.
For the installation of a grounding device, please
observe local electrical codes.
Grounding is necessary, especially for units using
inverter circuits, in order to release charged
electricity and electrical noise caused by high
tension. Otherwise, electrical shock may occur.
Place a dedicated ground more than 2 meters away
from other grounds and do not have it shared with
other electric appliances.
Table 2
Cross-Sectional
Area (mm
2
)
(A)+(B) (A) Power Supply Wiring Length (m)
(B) Power Line Length (m)
(C) Control
Line Length (m)
Fuse or Circuit
Breaker Capacity
15A
2
33
33
3.5
51
51
2
20
20
CRV94
CRV124
Model
WIRING SYSTEM DIAGRAM
Fig. 6
CAUTION
WARNING
NOTE
24