65
360
O
C Smart Air Flow
Cassette Type Indoor Unit
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.
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 Interruptor (mA)
response time (S)
Cross sectional
area of signal Line
Outdoor-indoor
(mm
2
)
Indoor-indoor
(mm
2
)
<10 2 20 20 20 A,30 mA,0.1S or below
2 cores×(0.75-2.0)mm
2
shielded line
≥10 and <15 3.5 25 30 30 A,30 mA,0.1S or below
≥15 and <22 5.5 30 40 40 A,30 mA,0.1S or below
≥22 and <27 10 40 50 50 A,30 mA,0.1S or below
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.
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