2-24
TC-12001
IN-THE-CEILING (DUCT)
18
P5414985
7.3
Field Minimum Wire Sizes for Power Source
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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.
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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
o
C.
(B) DO NOT PUSH THE BUTTON OF THE MAGNETIC SWITCH(ES). It will cause a serious accident.
NOTES:
1)
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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
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+51)
3) The wire sizes marked with *2 in the table are selected at the maximum current of the unit according to the
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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.
Model
Power Source
Maximum
Current
Power Source Cable Size
Transmitting Cable Size
IEC 60335-1 *1
MLFC *2
IEC 60335-1 *1
MLFC *2
53,)6164
53,)6164
53,)6164
53,)6164
240V/
1
I
/50Hz
5A
0.75mm
2
0.5mm
2
0.75mm
2
0.5mm
2
53,)6164
7A
1mm
2
0.5mm
2
1mm
2
0.5mm
2
Selection According to IEC 60335-1
Selection According to MLFC (at Cable Temperature of 60
o
C)
Current i (A)
Wire Size (mm
2
)
Current i (A)
Wire Size (mm
2
)
i < 6
0.75
i < 15
0.5
*3: In the case that
6 < i < 10
1
15 < i < 18
0.75
current exceeds 63A,
10 < i < 16
1.5
18 < i < 24
1.25
do not connect cables
16 < i < 25
2.5
24 < i < 34
2
in series.
25 < i < 32
4
34 < i < 47
3.5
32 < i < 40
6
47 < i < 62
5.5
40 < i < 63
10
62 < i < 78
8
63 < i
*3
78 < i < 112
14
112 < i < 147
22
