Field Minimum Wire Sizes For Power Source - Hitachi RPI-3.0FSN2SQ Installation & Maintenance Manual

IN-THE-CEILING (DUCT)
7.3

Field Minimum Wire Sizes for Power Source

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.
Pay attention to the following items while the system is running.
(A) 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
(B) DO NOT PUSH THE BUTTON OF THE MAGNETIC SWITCH(ES). It will cause a serious accident.
Model
NOTES:
1)
2) The wire sizes marked with *1 in the 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
3) The wire sizes marked with *2 in the table are selected at the maximum current of the unit according to the
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
18
2-24
Maximum
Power Source
Current
5A
240V/
1 /50Hz
7A
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 MLFC *2
2 2
0.75mm 0.5mm
2 2
1mm 0.5mm
Wire Size (mm
i < 15 0.5
0.75
1.25
2
3.5
5.5
8
14
22
Transmitting Cable Size
IEC 60335-1 *1 MLFC *2
2
0.75mm 0.5mm
2
1mm 0.5mm
o
C)
2
)
*3: In the case that
current exceeds 63A,
do not connect cables
in series.
P5414985
2
2
TC-12001