Power Supply Cable Wiring - Fujitsu AIRSTAGE J-III L AJ 072LELAH Series Design & Technical Manual

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
„
Recommended cable size
Model
Power cable
AJ  072LELAH
AJ  090LELAH
AJ  108LELAH
● Select wire size base on the value of MCA (Minimum Circuit Ampacity) and TOCA (Total
„
Value of Each Over Current Set). In the table of "3.OUTDOOR UNITS",example of wiring
specification for outdoor unit is given.
● Select circuit breaker for outdoor unit based on the value of MCA of "3.OUTDOOR UNITS".
„
The breaker should not operate when starting current is generated.
z Indoor unit
„
Model
All models
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 unit to satisfy conditions Table A and Table B
below.
Table A. Current breaker requirements
Model
All models
MCA : Minimum Circuit Ampacity
*1 : Refer chapter4 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 15 A.
If the capacity of connected indoor units exceeds the upper limit, either add breakers or use a
breaker with a greater capacity.
Table B. Earth leakage breaker requirements
Breaker capacity
30 mA, 0.1 sec or less
● Select cable size base on the value of total MCA of the indoor units connected. and if
„
necessary divided the system which the total MCA of the indoor units connected must be
smaller than 15 (A). The indoor units shall be connected up whthin refrigerant system.
● In order to be influenced of a breaker stop, please divide a power supply circuit for every
„
refrigerant system.
● Please attach at least one breaker per refrigerant system.
„
● Please design the power supply circuit to keep the voltage drop within 2%.
„
2
(mm )
Earth cable
6 6
6 6
6 6
Recommended Fuse capacity
2
cable size (mm )
2.5
MCA
(A)
*1
Maximum connectable indoor unit
Fuse capacity Breaker for
(A) leakage current
20
100mA 0.1sec
20
or less
25
Breaker for
(A) leakage current
20 Refer to Table B
Fuse capacity
(A)
20
30 or less
- (06 - 43) -
Remarks
Remarks
230V~ 50Hz
2Wire + ground