Mitsubishi Electric CITY MULTI PLFY-P20VBM-E Manuel D'installation page 7

4. Electrical work
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 Type1)/C} + {V1 × (Quantity of Type2)/C} + {V1 × (Quantity of Type3)/C} + {V1 × (Quantity of Others)/C}
Indoor unit
Type 1 PLFY-VBM, PMFY-VBM, PEFY-VMS,
PCFY-VKM, PKFY-VHM, PKFY-VKM, PLFY-VCM
Type 2 PEFY-VMA
Type 3 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 breaker (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 0.1sec or less
100 or less 100 mA 0.1sec or less
Wire thickness
2
1.5 mm
2
2.5 mm
2
4.0 mm
Minimum wire thickness (mm²)
Main cable Branch
1.5 1.5
2.5 2.5
4.0 4.0
V1
18.6
38
13.8
0
V3
48
56
66
Ground-fault interrupter *1
Ground
1.5 20 A current sensitivity *3
2.5 30 A current sensitivity *3
4.0 40 A current sensitivity *3
V2
2.4
1.6
4.8
0
4.3. Types of control cables
1. Wiring transmission cables
Types of transmission cable
Cable diameter
Length
2. M-NET Remote control cables
Types of remote control cable Shielding wire MVVS
Cable diameter
Length
3. MA Remote control cables
Types of remote control cable 2-core cable (unshielded)
Cable diameter
Length
Local switch (A)
Breaker for wiring
(NFB)
Capacity Fuse
16 16
25 25
32 32
Sample chart
6000
600
SAMPLE
60
10
1
0.1
0.01
1 2 3 4 6 8 10
C
Rated Tripping current (x)
Shielding wire CVVS or CPEVS
More than 1.25 mm²
Less than 200 m
0.5 to 1.25 mm²
Add any portion in excess of 10 m to within the
longest allowable transmission cable length 200 m
0.3 to 1.25 mm²
Less than 200 m
20
30
40
20
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