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11.4. Wiring of main power supply and equipment capacity
Schematic drawing of wiring (example)
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.
A Power supply (3-phase, 4-wire) 380/400/415 volt
B Switch
C Variable capacity unit
D Ground
Thickness of wire for main power supply and on/off capacities (example)
Minimum wire thickness (mm
Main cable
Model
PUHY-400
10.0
PUHY-500
16.0
PUHN-200
4.0
PUHN-250
6.0
Main Cable
Model
All Models
1.5
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 (L
C' Constant capacity unit
2
)
Branch
Ground
–
10.0
–
16.0
–
4.0
–
6.0
2
Wire Thickness (mm
)
Branch
Ground
1.5
1.5
, L
, L
, N
) are made incorrectly, damage to the unit could result.
1
2
3
E Power supply (single-phase) 220/230/240 volt
F 1.5 mm
2
or more
G Pull box
H Indoor unit
Switch (A)
Breaker for
wiring (NFB)
Capacity
Fuse
63
63
63
63
32
32
40
40
Switch (A)
Breaker for
Wiring (NFB)
Capacity
Fuse
16
16
Breaker for current leakage
75A
75A 100mA 0.1 sec or less
30A 100mA 0.1 sec or less
40
40A 100mA 0.1 sec or less
Breaker for Current Leakage
20A
20A 30mA 0.1 s. or less
33
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