Carrier XCT 7 40VD H-7S Series - Page 25

Electrical Wiring
The wiring for the power line of the indoor unit, the wiring between indoor and outdoor units, and the wiring
between indoor units:
Signal Wiring of Wired controller
• The electrical power line and signal lines must be fastened tightly.
• Every indoor unit must have a 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 the signal lines of the outdoor units grounded at one point.
• The whole length of the signal line should not exceed 1000m.
• The shielding lay of the signal line must be grounded at one end.
• The total length of the signal line should not be more than 250m.
Items
Total
Current of
Indoor Unit(A)
Cross
Section
(mm2)
Length
(m)
Rated
Current of
Overow
Breaker(A)
Rated current of residual
Circuit Breaker (A)
Ground Fault
Interuptor (mA)
Response time(S)
Cross Sectional Area of Signal
Line
Outdoor-
indoor
(mm2)
Indoor-indoor
(mm2)
<6 2.5 20 10 10A, 30mA,0,1S or below 2 cores x 0.75-2.0
mm
2
shielded line
>_6 and<10
4
20 16 16A, 30mA,0,1S or below
>_10 and <16 6 25 20 20A, 30mA,0,1S or below
>_16 and <25 8 30 32 32A, 30mA,0,1S or below
>_25 and <32 10 40 32 32A, 30mA,0,1S or below
Length of Signal Line (m) Wiring Dimensions
≤ 250 0.75mm
2
x 3 cores shielding line
18
ENGLISH