Mitsubishi Electric City Multi PUMY-P250YBM Installation Manual page 21

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)
<When power to Branch box is supplied from the outdoor unit>
A
3N~380-400-415 V
50 Hz
<When power is supplied separately>
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
<When power is supplied separately>
Model
PUMY-P250YBM
Outdoor unit
PUMY-P300YBM
<When power is supplied from the outdoor unit>
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.
<Indoor units> 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