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6. Electrical work
L1
Fig. 6-1
A
B
~230V
A
~230V
C
Fig. 6-2
Total operating current of the indoor unit
F0 = 15A or less *2
F0 = 20A or less *2
F0 = 30A or less *2
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
Type 1
PLFY-NBMU, PMFY-NBMU, PEFY-NMSU,
PCFY-NKMU, PKFY-NHMU, PKFY-NKMU
Type 2
PEFY-NMAU
Type 3
PEFY-NMHSU
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.
L1
L2 GR
D
C
C
C
C
C
B
D
L1 L2 GR
M1
M2
S
1 2
TB2
TB5
TB15
Minimum wire thickness (mm²/AWG)
Main cable
Branch
2.1/14
2.1/14
3.3/12
3.3/12
5.3/10
5.3/10
V1
V2
18.6
2.4
38
1.6
13.8
4.8
0
0
6.1. Electric wiring (Fig. 6-1)
Wiring procedures
1. Remove the tapping screw C then remove the beam.
2. Remove the (2) tapping screws B then remove the electric part cover A.
3. Connect the electric wires securely to the corresponding terminals.
4. Replace the removed parts.
5. Tie the electric wires with the local wiring clamp located in the right side of the
electrical box.
A means for the disconnection of the supply with an isolation switch, or similar de-
vice, in all active conductors shall be incorporated in the fixed wiring.
* Label each breaker according to purpose (heater, unit etc.)
A Cover
B Set screws (2 pcs)
C Set screws (Beam)
D Wiring clamp
E Control board
F Wire service entrance
G Terminal block for power supply
6.2. Power supply wiring
• Install an earth line longer than other cables.
• Power supply codes of appliance shall not be lighter than design 245IEC57 or
227IEC57, 245 IEC 53 or 227 IEC 53.
• A switch with at least 3 mm, 1/8 inch contact separation in each pole shall be
provided by the air conditioner installation.
[Fig. 6-2]
Ground-fault interrupter
A
Local switch/Wiring breaker
B
Indoor unit
C
Pull box
D
Ground
Capacity
Fuse
2.1/14
15
15
3.3/12
20
20
5.3/10
30
30
H Terminal block for transmission cable
I Address board
J Terminal block for MA Remote controller
i Secure with the wiring clamp.
Breaker for wiring
Ground-fault interrupter *1
(NFB)
15
15A current sensitivity *3
20
20A current sensitivity *3
30
30A current sensitivity *3
7
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