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ENGLISH
11.4. Wiring of main power supply and equipment capacity
Schematic drawing of wiring (example)
E Power supply (single-phase) 220/230/240 volt
F 1.5 mm
2
or more
G Pull box
H Indoor unit
Thickness of wire for main power supply and on/off capacities (example)
Switch (A)Minimum wire thickness (mm
2
)
Branch
Capacity
Breaker for
wiring (NFB)
Model
Outdoor unit
63
63
32
40
63
63
32
40
10.0
16.0
4.0
6.0
–
–
–
–
10.0
16.0
4.0
6.0
1. Use a separate power supply for the outdoor unit and indoor unit.
2. Bear in mind ambient conditions (ambient temperature,direct sunlight, rain water,etc.) when proceeding with the wiring and connections.
3. The wire size is the minimum value for metal conduit wiring. The power cord size should be 1 rank thicker consideration of voltage drops.
Make sure the power-supply voltage does not drop more than 10 %.
4. Specific wiring requirements should adhere to the wiring regulations of the region.
5. Power supply cords of parts of appliances for outdoor use shall not be lighter than polychloroprene sheathed flexible cord (design 245
IEC57). For example, use wiring such as YZW.
Warning:
• Be sure to use specified wires to connect so that no external force is imparted to terminal connections. If connections are not fixed firmly,
it may cause heating or fire.
• Be sure to use the appropriate type of overcurrent protection switch. Note that generated overcurrent may include some amount of direct
current.
Caution:
• Some installation site may require attachment of an earth leakage breaker. If no earth leakage breaker is installed, it may cause an electric
shock.
• Do not use anything other than breaker and fuse with correct capacity. Using fuse and wire or copper wire with too large capacity may
cause a malfunction of unit or fire.
• If the electrical wiring connections (L1, L2, L3, N ) are made incorrectly, damage to the unit could result.
Ground
Main cable
Fuse
75A
40
Breaker for current leakage
75A 100mA 0.1 sec or less
30A 100mA 0.1 sec or less
40A 100mA 0.1 sec or less
PUHY-400
PUHY-500
PUHN-200
PUHN-250
A Power supply (3-phase, 4-wire) 380/400/415 volt
B Switch
C Variable capacity unit C’ Constant capacity unit
D Ground
Note:
1. The transmission booster may be required according to the number of indoor units connected. (For details, see item 11.3. “Wiring
transmission cables”)
2. For switch capacity, see the installation manual for transmission booster.
Wire Thickness (mm
2
)
Main Cable
Model
Indoor Unit
All Models
Branch
Switch (A)
Capacity
Fuse
1616
Ground
1.5 1.5 1.5
Breaker for
Wiring (NFB)
20A
Breaker for Current Leakage
20A 30mA 0.1 s. or less