Carrier XCT7 Installations- Und Benutzerhandbuch Seite 31

Electric wiring and application
Indoor power source and communication wiring
Item Indoor Power
cable
total cur-
rent (A section
)
(mm )
2
<10 2
≥10 and <15 3.5
≥15 and <22 5.5
≥22 and <27 10
• The power cable and communication wire must be fixed firmly.
• Each indoor unit must be grounded well.
• When the power cable exceeds the permitted range, increase the gauge accordingly.
• Shielding layer of communication wires must be connected together and earthed at a single point.
• The total length of the communication wire cannot exceed 1000 m.
Communication wire for wired controller
Length of Signal Line (m)
≤ 250
• The shielding lay of the signal line must be grounded at one end.
• The total length of the signal line shall not exceed 250m.
Selection switch and display
In the following table, 1 is ON, 0 is OFF.
Indoor searching
BM1 1
after start-up
Note:
The number of indoor units must be locked by the BM1 1(OFF to ON) before running the outdoor units.
Rated Rated current of resid-
current of
ual circuit breaker (A)
Wire
overcurrent
Ground fault interrupter(-
length (m)
breaker
mA) response time(S)
(A)
20 20 20A, 30mA, below 0.1s
25 30 30A, 30mA, below 0.1s
30 40 40A, 30mA, below 0.1s
40 50 50A, 30mA, below 0.1s
Wiring Dimensions
0.75mm x 3core shielding line
2
24
Communication wire section
Outdoor/ indoor
(mm
2-core × (0.75-2.0mm
0 Begin to search indoor
Stop searching indoor and lock the
1
quantity
Indoor/
2 ) indoor
(mm 2 )
2 ) shielded wire