Hitachi RAC-112SQB - Page 14

14
● One to One (Method B: Power supply from the outdoor
unit)
● One to One (Method C: Individual power supply for
indoor and outdoor unit)
Precautions
Install an ELCB at the No Fuse Breaker (NFB) or manual switch of the branch circuit marketed “※” near the packaged
A/C.
Use a high-sensitivity, high-speed (trip time < 0.1 second) ELCB of the required capacity for high frequency operation
(for inverter use).
“B” and “C” in the table below refer to “Method B” and “Method C”.
Mode/Shape
ELCB Rated
Current
(A)
Power SW Wire Gauge (mm
2
)
Rated Current
(A)
Fuse Size
(A)
Power Cable
Indoor/Outdoor Connection
Wiring
B, C
Operation
Circuit
Earth
Remote
Control
Cable
B ⑩
C
Outdoor
C
Indoor
B Power
Outdoor
Unit
RAC-
Voltage
B
①
C
Outdoor
②
C
Indoor
③
B
④
C
Outdoor
⑤
C
Indoor
⑥
B
⑦
C
Outdoor
⑧
C
Indoor
⑨
<10m<20m <20m <35m <50m <70m <75m
112/125/140/
160SQB
AC
1Φ
230V
60Hz
50 50 5 60 60 30 35 35 5 8.0 8.0 8.0 2.0 2.0 2.0 2.0 2.0 3.5
Above
0.75
2.0
Above
0.75
● ELCB Selection
Determine the rated current of the ELCB based on the total wiring
capacity shown in the right table.
Determine the ELCB model, sensed current, and trip current based
on the information shown in the right table.
*Use high-sensitivity, high-speed (trip time < 0.1 second) ELCB.
*Confirm the ELCB rated current, sensitivity, and trip time and
protective coordination of the upper part.
Rated Current
(A)
ELCB Mode (trip current)
Rated Sensed Current
(mA)
15, 20, 30
EX-30(5kA),
EX-50B(10kA),
EX-50C(35kA)
30
40, 50
EX-50B(10kA),
EX-50C(35kA)
30, 100
60, 75, 100
EX-100(10kA),
EX-100B(35kA)
100
Note
1. Use high-sensitivity, high-speed ELCB with rated sensed current under 30mA or medium-sensitivity ELCB with rated
sensed current over 500mA. The trip time of both types must be within 0.1 second.
2. Use high-frequency ELCBs for inverter use.
● Select transformers according to the instructions below.
Transformer Capacity≧Maximum Wattage ×1.3
Determine maximum wattage as shown below:
Type RAC-112SQB RAC-125/140/160SQB
Max. Current (A) 27 28
Outdoor uni
t
Indoor uni
t
Remote control
Remote Control
Indoor uni
t
Outdoor uni
t
Remote controls