16
9-3. INDOOR – OUTDOOR CONNECTING CABLE
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The Max. cable length may vary depending on the condition of installation, humidity or materials, etc.
Indoor unit-Outdoor unit
Outdoor power supply
Max. 45m
3
o
1.5 (polar)
1
o
Min. 1.5
Max. 50m
3
o
2.5 (polar)
1
o
Min. 2.5
Max. 80m
3
o
2.5 (polar) and S3 separated
1
o
Min. 2.5
Indoor unit-Outdoor unit earth
Wire No.
o
Size (
E
)
Be sure to connect the indoor-outdoor connecting cables directly to the units (no intermediate connections).
Intermediate connections can lead to communication errors if water enters the cables and causes insufficient insulation to
ground or a poor electrical contact at the intermediate connection point.
(If an intermediate connection is necessary, be sure to take measures to prevent water from entering the cables.)
Indoor unit-Outdoor unit
Indoor/Outdoor separate
power supply
Max. 120m
2
o
Min. 0.3
—
Indoor unit-Outdoor unit earth
Wire No.
o
Size (
E
)
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The optional indoor power supply terminal kit is necessary.
✽
1 : In case that cable with stripe of yellow and green is available.
✽
2 : In case that the flat cables are connected as this picture, they can be used up to 80m.
✽
3 : In case of regular polarity connection (S1-S2-S3), wire size is 1.5mm
2
.
✽
4 : In case of regular polarity connection (S1-S2-S3)
✽
5 : Mentioned cable length is just a reference value.
It may be different depending on the condition of installation, humidity or materials, etc.
The cable length may vary depending on the condition of installation, humidity or materials, etc.
The cable shall not be lighter than design 60245 IEC or 60227 IEC.
Cross section
of cable
Round
2.5
2.5
1.5
2.5
3
3
4
4
50
✽
1
45
✽
3
60
✽
4
Not
applicable
✽
2
Flat
Flat
Round
Wire size
(mm
2
)
Number
of wires
Clockwise : S1-S2-S3
Clockwise : S1-S2-S3-Open
Connect S1 and S3 to the opposite angle
Not applicable
(Because center wire has no cover finish)
From left to right : S1-Open-S2-S3
Polarity
L(m)
✽
5
(3C Flat cable
✕
2)
S1 S2 S3
OCH415A-1.qxp 08.2.21 8:17 AM Page 16
