Carrier XCT 7 40VD072H-7S-QEE, Installation And Owner'S Manual

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17
Electrical Wiring
The wiring for the power line of indoor unit, the wiring between indoor and outdoor units as well as the wiring between
indoor units is as per the table below:
• 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 signal
lines of outdoor units grounded at one point.
• The length of 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 shall not be more than 250m.
Signal Wiring of Wired controller
Length of Signal Line (m) Wiring Dimensions
≤250 0.75mm 2 × core shielding line
Items
Total
Current of
Indoor Units(A)
Cross
Section
(mm 2 )
Length
(m)
Rated
Current of
Overflow
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
)
<6 2.5 20 6 6A,30mA,0.1S or below
2 cores×0.75-2.0mm
2
shielded line
≥6 and <10 2.5 20 10 10A,30mA,0.1S or below
≥10 and <16 4 25 16 16A,30mA,0.1S or below
≥16 and <25 6 30 25 25A,30mA,0.1S or below
≥25 and <32 10 50 32 32A,30mA,0.1S or below