Panasonic U-8MF1E8 Installation Instructions Manual page 16

4. ELECTRICAL WIRING
4-1. General Precautions on Wiring
(1) Before wiring, confirm the rated voltage of the unit as
shown on its nameplate, then carry out the wiring closely
following the wiring diagram.
(2) Provide a power outlet to be used exclusively for each
unit, and a power supply disconnect and circuit breaker for
overcurrent protection should be provided in the exclusive
line.
(3) To prevent possible hazards from insulation failure, the unit
must be grounded.
(4) Each wiring connection must be done in accordance with
the wiring system diagram. Wrong wiring may cause the
unit to misoperate or become damaged.
(5) Do not allow wiring to touch the refrigerant tubing,
compressor, or any moving parts of the fan.
(6) Unauthorized changes in the internal wiring can be very
dangerous. The manufacturer will accept no responsibility
for any damage or misoperation that occurs as a result of
such unauthorized changes.
(7) Regulations on wire diameters differ from locality to
locality. For field wiring rules, please refer to your LOCAL
ELECTRICAL CODES before beginning.
You must ensure that installation complies with all relevant
rules and regulations.
(8) To prevent malfunction of the air conditioner caused by
electrical noise, care must be taken when wiring as follows:
● The remote control wiring and the inter-unit control wiring
should be wired apart from the inter-unit power wiring.
● Use shielded wires for inter-unit control wiring between units
and ground the shield on both sides.
(9) If the power supply cord of this appliance is damaged,
it must be replaced by a repair shop appointed by the
manufacturer, because special purpose tools are required.
SUPPLEMENT
4-2. Recommended Wire Length and Wire Diameter
for Power Supply System
Outdoor unit
(A) Power supply Time delay
fuse or circuit
Wire size Max. length
capacity
U-8MF1E8 6 mm 2 92 m 30 A
U-10MF1E8 6 mm 2 70 m 35 A
2
U-12MF1E8 6 mm 57 m 40 A
U-14MF1E8 10 mm 2 79 m 40 A
U-16MF1E8 10 mm 2 68 m 50 A
or
(A) Power supply Time delay
fuse or circuit
Wire size Max. length
capacity
U-8MF1E8 6 mm 2 92 m 35 A
2
U-10MF1E8 6 mm 70 m 35 A
U-12MF1E8 10 mm 2 95 m 50 A
U-14MF1E8 10 mm 2 79 m 50 A
2
U-16MF1E8 10 mm 68 m 50 A
Indoor unit
(B) Power supply
Time delay fuse or
Type
circuit capacity
2.5 mm 2
K1 Max. 150 m 10 – 16 A
D1, L1, U1, Y1, T1, F1, M1,
Max. 130 m 10 – 16 A
P1, R1
E1 (73, 106, 140) Max. 60 m 10 – 16 A
E1 (224) Max. 50 m 10 – 16 A
E1 (280) Max. 30 m 10 – 16 A
Control wiring
(C) Inter-unit (between outdoor and
(D) Remote control wiring
indoor units) control wiring
0.75 mm 2 (AWG #18)
0.75 mm 2 (AWG #18)
Use shielded wiring* 1
Max. 1,000 m Max. 500 m
(E) Control wiring for group control (F) Inter-outdoor unit control wiring
2
0.75 mm (AWG #18)
2
0.75 mm (AWG #18)
Use shielded wiring
Max. 200 m (Total) Max. 300 m
N OTE
*1 With ring-type wire terminal.
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4-3. Wiring System Diagram
Indoor unit
(No. 1)
L
Power supply
L
N
220 – 240V ~50/60Hz
N
C
Ground
B
U1
Remote
U2
controller D
Ground
WHT
1 1 R1
BLK 2 2 R2
Ground
C
Indoor unit
Ground
(No. 2)
F
L
Power supply
L Ground
N
220 – 240V ~50/60Hz
N
Ground
B
U1
Remote
U2 Ground
controller D
WHT
1 1 R1
R2
BLK 2 2
Ground
C
Indoor unit
Group control:
(No. 3)
L
Power supply
L
N
220 – 240V ~50/60Hz
N
Ground
B
Ground
E
U1
U2
R1
R2
Ground
C
Indoor unit
(No. n)
L
Power supply
L
N
220 – 240V ~50/60Hz
N
Ground
Ground
B
U1
Remote
U2
controller D
WHT
1 1 R1
BLK
2 2 R2
NOTE
(1) Refer to Section 4-2. "Recommended Wire Length
and Wire Diameter for Power Supply System" for the
explanation of "A", "B", "C", "D", "E" and "F" in the above
diagrams.
(2) The basic connection diagram of the indoor unit shows
the 7P terminal board, so the terminal boards in your
equipment may differ from the diagram.
(3) Refrigerant Circuit (R.C.) address should be set before
turning the power on.
(4) Regarding the R.C. address setting, refer to page 41.
Address setting can be executed by remote controller
automatically.
Refer to Section 7-4. "Auto Address Setting".
Outdoor unit
INV unit
A
L1
Power supply
L1
L2
1
380 – 415V, 3 N~, 50Hz
L2
L3
2
L3
N
N
3
4
Ground
Inter-outdoor-unit control wiring
Outdoor unit
INV unit
A
L1
Power supply
L1
L2
380 – 415V, 3 N~, 50Hz
L2
L3
3
L3
N
4 N
Ground
5P terminal board
L1 L2 L3 N
Power supply
4P terminal board
1 2 3 4
Inter-unit Inter-outdoor unit
control wiring
control wiring
MF1 Type
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