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9.4.2 Wire Length and Diameter
• Be sure to connect the power supply line to the
indoor unit as shown in the wiring diagram.
• 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.
To avoid the risk of electric shock, each air
conditioner unit must be grounded.
Regulations on wiring diameter differ from locality. For field wiring requirements, please refer to
local electrical codes. Carefully observe these regulations when carrrying out the installation.
Table 1 lists the recommended and max. allowable wire lengths and diameters for the power
supply system. Please refer to the wiring system diagram (Fig.18 & 19) for the meaning of “A”, “B”
in Table 1a,b,c,d.
*(A) Power supply wiring length (m) ; *(B) Power connection wire length (m)
Table 1c
Cross-sectional
area (mm
2
)
Recommended
Fuse or Circuit
breaker capacity
Model 2.5 x (3)
KC18AP 1.8m
32m
20A
*(A)
*(B)
(A) + (B)
2.5 x (4) 2.5
Max. allowed
5.0m
KC25AP 1.8m
32m
30A5.0m
CAUTION
WARNING
Models: KC18AP, KC25AP
Grounding Line
OUTDOOR
UNIT
2
Terminal
N(1)
2
N
L
Terminal
Power Supply
Single Phase
230VAC 60HZ
L
N
(A)
P.C.B
N(1)
Blue
Black
Brown
(B)
INDOOR
UNIT
WARNING
9. INSTALL INDOOR UNIT
Installation Service
Yellow-Green
(Grounding Line)
33
Table 1b
Cross-sectional
area (mm
2
)
Recommended
Fuse or circuit
breaker capacity
Model 1.5 x (3)
KC12AP
1.6m 22m 10A
*(A)
*(B)
(A) + (B)
1.5 x (3) 1.5
Max. allowed
5.0m
WIRING SYSTEM DIAGRAM
Models: KC9AP, KC12AP
Grounding Line
OUTDOOR
UNIT
2
Terminal
N(1)
2
N
L
Terminal
Power Supply
Single Phase
230VAC 60HZ
L
N
(A)
P.C.B
N(1)
Blue
Black
Yellow-Green
(Grounding Line)
(B)
INDOOR
UNIT
Grounding Line
INDOOR
UNIT
2
Terminal
N(1)
2
5
N(4)
Terminal
Power Supply
Single Phase
230VAC 60HZ
L
N
(A)
N(1)
Blue
Black
Brown
(B)
OUTDOOR
UNIT
Yellow-Green
(Grounding Line)
33
BU
BN
Table 1d
Cross-sectional
area (mm
2
)
Recommended
Fuse or circuit
breaker capacity
Model
4.0 x (3)
KC30AP
6.0m
20m 30A
*(A)
*(B)
(A)
1.0 x (4) 4.0
Max. allowed
5.5m
*(B)
1.0 x (4)
32m
Model: KC30AP
(a) Fig.18 (KC9AP, KC12AP, KC18AP, KC25AP)
The outdoor unit draws its power from the
indoor unit.
(b) Fig.19 (KC30AP)
The indoor unit draws its power from the
outdoor unit.
Fig. 18 Outdoor unit draws its power
from indoor unit.
Fig. 19 Indoor unit draws its power
from outdoor unit.
BN (BK)
BU (WH)
BN
BU
Table 1a
Cross-sectional
area (mm
2
)
Recommended
Fuse or circuit
breaker capacity
Model 1.0x (3)
*(A)
*(B)
(A) + (B)
1.0x (3) 1.0
Max. allowed
KC9AP
1.6m 17m 10A
5.0m