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Type of cable
Cable diameter
Maximum length of transmission lines for centralized control and indoor/
outdoor transmission lines (Maximum length via indoor units): 500 m MAX
Remarks
The maximum length of the wiring between power supply unit for
transmission lines (on the transmission lines for centralized control) and
each outdoor unit and system controller is 200 m.
*1 Connected with simple remote controller.
9.1. Power supply wiring
•
Use dedicated power supplies for the indoor unit.
•
Bear in mind ambient conditions (ambient temperature,direct sunlight, rain water, etc.) when proceeding with the wiring and connections.
•
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%.
•
Specific wiring requirements should adhere to the wiring regulations of the region.
•
Power supply cords of appliances shall not be lighter than design 245 IEC 57, 227 IEC 57, 245 IEC 53 or 227 IEC 53.
•
A switch with at least 3 mm contact separation in each pole shall be provided by the Air conditioner installation.
[Fig. 9.1.1] (P.4)
A
Ground-fault interrupter
B
Local switch/Wiring breaker
C Indoor unit
D Pull box
Minimum wire thickness (mm
Total operating current of
the Indoor unit
Main cable
F0 = 16 A or less *
2
1.5
F0 = 25 A or less *
2
2.5
F0 = 32 A or less *
2
4.0
Apply to IEC61000-3-3 about Max. Permissive System Impedance.
*1 The Ground-fault interrupter should support Inverter circuit.
The Ground-fault interrupter should combine using of local switch or wiring breaker.
*2 Please take the larger of F1 or F2 as the value for F0.
F1 = Total operating maximum current of the indoor units ✕ 1.2
F2 = {V1 ✕ (Quantity of Type1)/C} + {V1 ✕ (Quantity of Type2)/C} + {V1 ✕ (Quantity of Type3)/C} + {V1 ✕ (Quantity of Others)/C}
Indoor unit
PLFY-VBM, PMFY-VBM, PEFY-VMS, PCFY-VKM, PKFY-VHM,
Type1
PKFY-VKM, PFFY-VKM, PFFY-VLRMM
Type2
PEFY-VMA
Type3
PEFY-VMHS
Others
Other indoor unit
C : Multiple of tripping current at tripping time 0.01s
Please pick up "C" from the tripping characteristic of the breaker.
<Example of "F2" calculation>
*Condition PEFY-VMS ✕ 4 + PEFY-VMA ✕ 1, C = 8 (refer to right sample chart)
F2 = 18.6 ✕ 4/8 + 38 ✕ 1/8
= 14.05
16 A brea ker (Tripping current = 8 ✕ 16 A at 0.01s)
*3 Current sensitivity is calculated using the following formula.
G1 = (V2 ✕ Quantity of Type1) + (V2 ✕ Quantity of Type2) + (V2 ✕ Quantity of Type3) + (V2 ✕ Quantity of Others) + (V3 ✕ Wire length [km])
G1
Current sensitivity
30 or less
30 mA 0.1 sec or less
100 or less
100 mA 0.1 sec or less
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 the correct capacity breaker and fuse. Using fuse, wire or copper wire with too large capacity may cause a risk of
malfunction or fire.
Notes:
•
This device is intended for the connection to a power supply system with a maximum permissible system impedance (Refer to IEC61000-3-3.) 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.
10
Transmission cables
Shielding wire (2-core)
CVVS, CPEVS or MVVS
More than 1.25 mm
2
Max length: 200 m
2
)
Ground-fault interrupter *
Branch
Ground
1.5
1.5
20 A current sensitivity *
2.5
2.5
30 A current sensitivity *
4.0
4.0
40 A current sensitivity *
Wire thickness
2
1.5 mm
2
2.5 mm
2
4.0 mm
ME Remote controller cables
Sheathed 2-core cable (unshielded) CVV
0.3 ~ 1.25 mm
(0.75 ~ 1.25 mm
When 10 m is exceeded, use
cables with the same specifica-
tion as transmission cables.
CVVS, MVVS: PVC insulated PVC jacketed shielded control cable
CPEVS: PE insulated PVC jacketed shielded communication cable
CVV: PVC insulated PVC sheathed control cable
Local switch (A)
1
Capacity
Fuse
3
16
16
3
25
25
3
32
32
V1
V2
18.6
2.4
38
1.6
13.8
4.8
0
0
V3
48
56
66
MA Remote controller cables
2
0.3 ~ 1.25 mm
2
)*1
(0.75 ~ 1.25 mm
Max length: 200 m
Breaker for wiring (A)
(Non-fuse breaker)
20
30
40
6000
600
SAMPLE
60
10
1
0.1
0.01
1
2
3
4
6
8
10
C
Rated Tripping current (x)
Sample chart
2
2
)*1
20
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