Electrical Wiring Capacity; Field Minimum Wire Sizes For Power Source - Hitachi RPC-2.0FSR Installation & Maintenance Manual

7.2 Electrical Wiring Capacity
7.2.1 Field Minimum Wire Sizes for Power Source
• Use an ELB (Earth Leakage Breaker).
If not used, it will cause an electric shock or a fire.
• Do not operate the system until all the check points have been cleared.
(A) Check to ensure that the electrical resistance is more than 1 megohm, by measuring the resistance
between ground and the terminal of the electrical parts. If not, do not operate the system until the
electrical leakage is found and repaired.
(B) Check to ensure that the stop valves of the outdoor unit are fully opened, and then start the system.
(C) Check to ensure that the switch on the main power source has been ON for more than 12 hours, to
warm the compressor oil by the crankcase heater.
• Do not touch any of the parts by hand at the discharge gas side, since the compressor chamber and the
pipes at the discharge side are heated higher than 90
Model
RPC-1.5FSR
RPC-2.0FSR
RPC-2.5FSR
RPC-3.0FSR
RPC-4.0FSR
RPC-5.0FSR
RPC-6.0FSR
NOTES:
1) Follow local codes and regulations when selecting field wires.
2) The wire sizes marked with *1 in the above table are selected at the maximum current of the unit according to the
European Standard, IEC 60335-1. Use the wires which are not lighter than the ordinary tough rubber sheathed
flexible cord (code designation H05RN-F) or ordinary polychloroprene sheathed flexible cord (code designation
H05RN-F).
3) The wire sizes marked with *2 in the above table are selected at the maximum current of the unit according to the
wire, MLFC (Flame Retardant Polyflex Wire) manufactured by Hitachi Cable Ltd., Japan.
4) Use a shielded cable for the transmitting circuit and connect it to ground.
5) In the case that power cables are connected in series, add each unit maximum current and select wires below.
Selection According to IEC 60335-1
Current i (A)
i < 6
6 < i < 10
10 < i < 16
16 < i < 25
25 < i < 32
32 < i < 40
40 < i < 63
63 < i
22
Power Maximum
Source Current
220-240V/1f/50Hz
220V/1f/60Hz
Selection According to MLFC (at Cable Temperature of 60
2
Wire Size (mm ) Current i (A)
0.75
1 15 < i < 18
1.5 18 < i < 24
2.5 24 < i < 34
4 34 < i < 47
6 47 < i < 62
10 62 < i < 78
*3 78 < i < 112
112 < i < 147
o
C.
Power Source Cable Size
IEC 60335-1 *1
2
5A 0.75mm
Wire Size (mm
i < 15 0.5
0.75
1.25
2
3.5
5.5
8
14
22
Transmitting Cable Size
MLFC *2 IEC 60335-1 *1
2 2
0.5mm 0.75mm
2
)
*3: In the case that
current exceeds 63A,
do not connect cables
in series.
A10762300A-rev.1
MLFC *2
2
0.5mm
o C)