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11.4. Wiring of main power supply and equipment capacity
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:
•
The reverse phase of L lines (L1, L2, L3) can be detected (Error cord : 4103), but the reverse phase of L lines and N line can be not be
detected.
- The some electric parts should be damaged when power is supplied under the miss wiring.
•
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.
Schematic drawing of wiring (example)
Note 1,2
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
10.0
PUHY-P400
16.0
PUHY-P500
4.0
PUHN-P200
6.0
PUHN-P250
Model
Main cable
16 A or less
Total operating
current of the in-
25 A or less
door units
32 A or less
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.
6. The total operating current of the indoor units may fluctuate depending on the operating status of the indoor units. In order to prevent
malfunctions, use a circuit breaker with a current of about 20% more than that listed in the specifications.
Transmission booster
C' Constant capacity unit
2
Switch (A)
)
Branch
Ground
Capacity
–
10.0
63
–
16.0
63
–
4.0
32
–
6.0
40
2
Wire thickness (mm
)
Branch
Ground
1.5
1.5
1.5
2.5
2.5
2.5
4.0
4.0
4.0
E Power supply (single-phase) 220/230/240 volt
F 1.5 mm
2
or more
G Pull box
H Indoor unit
Breaker for wiring (NFB)
Fuse
63
75 A
63
32
40 A
40
Switch (A)
Breaker for wiring (NFB)
Capacity
Fuse
16
16
20 A
25
25
30 A
32
32
40 A
Breaker for current leakage
75 A 100 mA 0.1 sec. or less
30 A 100 mA 0.1 sec. or less
40 A 100 mA 0.1 sec. or less
Breaker for current leakage
20 A 30 mA 0.1 sec. or less
30 A 30 mA 0.1 sec. or less
40 A 30 mA 0.1 sec. or less
37
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