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11.4. Wiring of main power supply and equipment capacity
Schematic Drawing of Wiring (Example)
[Fig. 11.4.1] (P.9)
A Switch (Breakers for wiring and current leakage)
D Pull box
Thickness of wire for main power supply, capacities of the switch and system impedance
Model
PUHY-HP200YHM-A
Outdoor unit
PUHY-HP250YHM-A
*1: Meets technical requirements of IEC61000-3-3
1. Use dedicated power supplies for the outdoor unit and indoor unit. Ensure OC and OS are wired individually.
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. If the voltage drops, use a wire that is one rank thicker in diameter.
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. A switch with at least 3 mm contact separation in each pole shall be provided by the Air Conditioner installer.
Warning:
•
Be sure to use specified wires for connections and ensure no external force is imparted to terminal connections. If connections are not fixed firmly, heating
or fire may result.
•
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 sites may require attachment of an earth leakage breaker for the inverter. If no earth leakage breaker is installed, there is a danger of
electric shock.
•
Do not use anything other than a breaker and fuse with the correct capacity. Using a fuse or wire of too large capacity may cause malfunction or fire.
Note:
•
This device is intended for the connection to a power supply system with a maximum permissible system impedance shown in the above table at the
interface point (power service box) of the user's supply.
•
The user must ensure that this device is connected only to a power supply system which fulfils the requirement above.
If necessary, the user can ask the public power supply company for the system impedance at the interface point.
•
This equipment complies with IEC 61000-3-12 provided that the short-circuit power S
user's supply and the public system. It is the responsibility of the installer or user of the equipment to ensure, by consultation with the distribution network
operator if necessary, that the equipment is connected only to a supply with a short-circuit power S
S
(*2)
SC
Model
S
(MVA)
SC
PUHY-HP200YHM
1.87
PUHY-HP250YHM
2.24
20
B Breakers for current leakage
E Indoor unit
Minimum wire thickness (mm
2
)
Switch (A)
Main cable
Branch
Ground
Capacity
4.0
-
4.0
32
6.0
-
6.0
40
Breaker
for wiring
Breaker for current leakage
Fuse
(NFB) (A)
32
30
30A 100mA 0.1sec. or less
40
40
40A 100mA 0.1sec. or less
is greater than or equal to S
SC
SC
greater than or equal to S
SC
C Outdoor unit
Maximum
Max. Permissive
circuit ampacity
System Impedance
(MCA) (A)
26.3
*1
0.24 Ω
31.5
(*2) at the interface point between the
(*2).
SC
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