Fujitsu Airstage J-II Series Design & Technical Manual page 603

4-2. POWER SUPPLY CABLE WIRING
„ POWER SUPPLY CABLE SPECIFICATIONS
„
Use a separate power supply for the outdoor unit and indoor unit.
z Outdoor unit
„
Selection of the power supply cable and breaker when connecting single outdoor unit.
Refer to the table for the breaker specifications of each installation condition.
Use
Power supply cable
Model
AOU36RLAVM
AOU48RLAVM
AOU60RLAVM
MCA : Minimum Circuit Ampacity
MAX.CKT.BKR : Maximum Circuit Breaker
GFEB : Ground Fault Equipment Breaker
● Select the power cable type and size in accordance with local regulations.
„
● Select a wire length (Max. wire length) such that the voltage drop is less than 2%.
„
● When the wire length is long and voltage drop exceeds this value, increase the wire
„
diameter to stay within design limits.
z Indoor unit
„
Refer to the table for the breaker specifications of each installation condition. Perform the
power crossover wiring within the range of the same refrigerant system.When the crossover
wiring is done, make a connection for "indoor units" to satisfy conditions Table A and Table B
below.
Table A. Current breaker requirements
Model
All models
MCA : Minimum Circuit Ampacity
MAX.CKT.BKR : Maximum Circuit Breaker
*1 : Refer chapter 4.2. ELECTRIC CHARACTERISTICS
When the power crossover wiring is done, make it so that the total of the MCA of the
connected "indoor units" does not exceed the 11 A.
NOTE: With Vertical air handler type, connect only one indoor unit to a MAX.CKT.BKR.
(Crossover wiring is prohibited.) Select a minimum of 7 or more multiples of rated current under
the condition time in seconds 10 ms (0.01 S) or less at the current breaker trip curves (time in
seconds/multiples of rated current).
Table B. Ground Fault Equipment Breaker requirements
Breaker capacity
30 mA, 0.1 sec or less
Size
8 AWG (8.4 mm²)
MCA MAX.CKT.BKR
(A)
33
37
MCA MAX.CKT.BKR
(A)
*1
Maximum connectable "Units"
- (06 - 39) -
Remarks
2 cable + Ground, ~ 208 / 230 V
(A)
40
(A)
15
9 or less
GFEB
30 mA
0.1 sec or less