162
The wiring for the power line of indoor unit, the wiring between indoor and outdoor units as well as the wiring
between indoor units:
■ The electrical power line and signal lines must be fastened tightly.
■ Every indoor unit must have the ground connection.
■ The power line should be enlarged if it exceeds the permissible length.
■ Shielded lays of all the indoor and outdoor units should be connected together, with the shielded lay at the side of
signal lines of outdoor units grounded at one point.
■ It is not permissible if the whole length of signal line exceeds 1000m.
Signal wiring of wired controller
Length of signal line (m) Wiring dimensions
≤ 250 0.75mm
2
×3 core shielded line
※
The shielding lay of the signal line must be grounded at one end.
※
The total length of the signal line shall not be more than 250m.
Items
Total
current of
indoor units (A)
Cross
section
(mm
2
)
Length
(m)
Rated
current of
overow
breaker (A)
Rated current of residual circuit
breaker (A)
Ground fault Interrupter (mA)
Response time (S)
Cross sectional
area of signal Line
Outdoor
-indoor (mm
2
)
Indoor
-indoor (mm
2
)
<7 2.5 20 10 10 A, 30 mA, 0.1S or below
2 cores×(0.75-2.0)
mm
2
shielded line
≥7 and <11 4 20 16 16 A, 30 mA, 0.1S or below
≥11 and <16 6 25 20 20 A, 30 mA, 0.1S or below
≥16 and <22 8 30 32 32 A, 30 mA, 0.1S or below
≥22 and <27 10 40 32 32 A, 30 mA, 0.1S or below
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