8
en
5. Electrical work
• If the cables have the same diameter, insert them into the
cut outs on both sides.
• If the cables have different diameters, insert them on one
side into separate spaces with one cable positioned above
the other.
<When wiring two indoor-outdoor connection cables>
Cut outs
WARNING
• Connecting two wires on one side is prohib-
ited.
• Connecting three wires or more to the same
terminal is prohibited.
• Connecting wires with different diameters is
prohibited.
When using a single cable, a round crimped terminal or other
terminal work is prohibited.
Total operating current of the indoor unit
Minimum wire thickness (mm²)
Ground-fault interrupter *1
Local switch (A)
Breaker for wiring
(NFB)
Main cable
Branch
Ground
Capacity
Fuse
F0 = 16 A or less *2
1.5
1.5
1.5
20 A current sensitivity *3
16
16
20
F0 = 25 A or less *2
2.5
2.5
2.5
30 A current sensitivity *3
25
25
30
F0 = 32 A or less *2
4.0
4.0
4.0
40 A current sensitivity *3
32
32
40
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 indoor unit 1)/C} + {V1 × (Quantity of indoor unit 2)/C} + {V1 × (Quantity of indoor unit 3)/C} +
···
• V1 and V2
V1 and V2 are the breaker coefficient.
V1: Breaker coefficient of rated current
V2: Breaker coefficient of current sensitivity
The values of V1 and V2 differ from depending on the model. Therefore, please refer to IM of each model.
• C : Multiple of tripping current at tripping time 0.01 s
Please pick up “C” from the tripping characteristic of the breaker.
<Example of “F2” calculation>
*Condition : PLFY-VEM × 4 + PEFY-VMA × 1
V1 of PLFY-VEM = 19.8, V1 of PEFY-VMA = 38, C = 8 (refer to right sample chart)
F2 = 19.8 × 4/8 + 38 × 1/8
= 14.65
= 16 A breaker (Tripping current = 8 × 16 A at 0.01 s)
*3 Current sensitivity is calculated using the following formula.
G1 = V2 × (Quantity of indoor unit 1) + V2 × (Quantity of indoor unit 2) + V2 × (Quantity of indoor unit 3)
+ ··· + V3 × (Wire length [km])
<Example of “G1” calculation>
*Condition : PLFY-VEM × 4 + PEFY-VMA × 1
V2 of PLFY-VEM = 2.4, V2 of PEFY-VMA = 1.6, Wire thickness and length :1.5 mm
2
0.2 km
G1 = 2.4 × 4 + 1.6 × 1 + 48 × 0.2
= 20.8
As a result , current sensitivity is 30 mA 0.1 sec or less.
V1
V2
PLFY-VEM
19.8
2.4
1
2
3 4
6 8 10
20
C
6000
600
60
10
1
0.1
0.01
SAMPLE
Sample chart
Tripping T
ime
[s]
Rated Tripping current (x)
5.2. Power supply wiring (Fig. 5-4)
• Wiring size must comply with the applicable local and national code.
• Install an earth longer than other cables.
• Power supply codes of appliance shall not be lighter than design 60245 IEC 53 or
60227 IEC 53.
• A switch with at least 3 mm contact separation in each pole shall be provided by
the air conditioner installation.
A
Ground-fault interrupter
B
Local switch/Wiring breaker
C
Indoor unit
D
Pull box
Warning:
Never splice the power cable or the indoor-outdoor connection cable, otherwise
it may result in a smoke, a fire or communication failure.
Fig. 5-4
A
B
C
C
C
C
C
C
C
C
D
A
B
D
1 2
M1M2 S
TB2
TB5
TB15
L N
~ 220 - 240 V
~ 220 - 240 V
G1
Current sensitivity
30 or less
30 mA 0.1 sec or less
100 or less
100 mA 0.1 sec or less
Wire thickness
V3
1.5 mm
2
48
2.5 mm
2
56
4.0 mm
2
66
~ 220 - 240 V
Indoor
unit 1
Indoor
unit 1
Indoor
unit 2
Indoor
unit 3
Indoor
unit 3
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