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Mitsubishi Electric City Multi PUMY-P250YBM Installation Manual page 21

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Table of Contents
6. Electrical work
6.3. Wiring of main power supply and equipment capacity
Schematic Drawing of Wiring: When Not Using a Branch box (Example) (Fig. 6-3)
A
3N~380-400-415 V AC
50 Hz
A : Switch (Breakers for Wiring and Current Leakage (if you use))
B : Outdoor Unit
C : Pull Box
D : Indoor Unit
Schematic Drawing of Wiring Connection with Branch box (Example) (Fig. 6-4)
A
3N~380-400-415 V
50 Hz
A
3N~380-400-415 V 50 Hz
A Switch (Breakers for Wiring and Current Leakage)
B Outdoor Unit
C Branch box
D A-Control Indoor Unit (M series indoor unit)
E M-NET control Indoor unit (City Multi indoor unit)
F Pull Box
Model
PUMY-P250YBM
Outdoor unit
PUMY-P300YBM
Model
PUMY-P250YBM
Outdoor unit
PUMY-P300YBM
*1 A breaker with at least 3.0 mm contact separation in each poles shall be provided. Use non-fuse breaker (NF) or earth leakage breaker (NV).
*2 In multi-phase appliances, the colour of the neutral conductor of the supply cord, if any, shall be blue.
When power is supplied to indoor unit and outdoor unit separately
Total operating current of the indoor unit
F0 = 16 A or less *2
F0 = 25 A or less *2
F0 = 32 A 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 Type 1)/C} + {V1 × (Quantity of Type 2)/C} + {V1 × (Quantity of Type 3)/C} + ··· + {V1 × (Quantity of Type 14)/C}
B
~/N 220-230-240 V AC
50 Hz
B
L1/L2/L3/N
B1/B2
L/N
L/N
B
~/N 220-230-240 V 50 Hz
L1/L2/L3/N
Minimum Wire Cross-sectional area (mm²)
Power supply *2
Main Cable
3N~ 380-400-415 V 50 Hz
3N~ 380-400-415 V 50 Hz
Minimum Wire Cross-sectional area (mm²)
Power supply *2
Main Cable
3N~ 380-400-415 V 50 Hz
3N~ 380-400-415 V 50 Hz
Minimum wire thickness (mm
Main Cable
Branch
Ground
1.5
1.5
2.5
2.5
4.0
4.0
A
D
Fig. 6-3
C
A Switch (Breakers for Wiring and Current Leakage)
S1/S2/S3
D
B Outdoor Unit
C Branch box
S1/S2/S3
D
D A-Control Indoor Unit (M series indoor unit)
S1/S2/S3
D
C
S1/S2/S3
S1/S2/S3
D
L/N
S1/S2/S3
S1/S2/S3
D
S1/S2/S3
S1/S2/S3
Fig. 6-4
A
C
S1/S2/S3
L/N
S1/S2/S3
S1/S2/S3
Fig. 6-5
Ground
4.0
4.0
6.0
6.0
Ground
6.0
6.0
6.0
6.0
)
2
Ground-fault interrupter *1
1.5
20 A current sensitivity *3
2.5
30 A current sensitivity *3
4.0
40 A current sensitivity *3
C
D
D
C
D
D
F
C
S1/S2/S3
D
D
L/N
S1/S2/S3
D
D
S1/S2/S3
D
Breaker for Wiring *1
Breaker for Current Leakage
32 A
32 A 30 mA 0.1 sec. or less
40 A
40 A 30 mA 0.1 sec. or less
Breaker for Wiring *1
Breaker for Current Leakage
40 A
40 A 30 mA 0.1 sec. or less
40 A
40 A 30 mA 0.1 sec. or less
Local switch (A)
Capacity
Fuse
16
16
25
25
32
32
D
en
L/N
E
Breaker for wiring
(NFB)
20
30
40
20
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