Mitsubishi Electric CITY MULTI PEFY-P22VMS-E-S Data Book page 284

1. Electrical work
1-3. Power cable specifications
Thickness of wire for main power supply, capacities of the switch and system impedance
Model
PUMY-P100YHMC-C
PUMY-P125YHMC-C
PUMY-P140YHMC-C
PUMY-P100VHMC-S
Outdoor unit
PUMY-P125VHMC-S
PUMY-P140VHMC-S
PUMY-P200YKMC-C
PUMY-P250YKMC-C
F0 = 16A or less *2
Total operating
current of F0 = 25A or less *2
the indoor unit
F0 = 32A or less *2
*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 curent of the indoor units × 1.2
F2 = {V1 × (Quantity of Type1)/C} + {V1 × (Quantity of Type2)/C} + {V1 × (Quantity of Others)/C}
Indoor unit
Type1 PLFY-VBM, PMFY-VBM, PEFY-VMS, PKFY-VHM
Type2 PEFY-VMA
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 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
1. Use dedicated power supplies for the outdoor unit and indoor unit. Ensure OC and OS are wired individually.
2. Bear in mind ambient conditions (ambient temperature,direct sunlight, rain water,etc.) when proceeding with the wiring and connections.
3. The wire size is the minimum value for metal conduit wiring. If the voltage drops, use a wire that is one rank thicker in diameter. Make sure the power-supply voltage does not drop more
than 10%.
4. Specific wiring requirements should adhere to the wiring regulations of the region.
5. Power supply cords of parts of appliances for outdoor use shall not be lighter than polychloroprene sheathed flexible cord (design 245 IEC57). For example, use wiring such as YZW.
6. A switch with at least 3 mm contact separation in each pole shall be provided by the Air Conditioner installer.
Be sure to use specified wires for connections and ensure no external force is imparted to terminal connections. If connections are not fixed firmly, heating or fire may result.
Be sure to use the appropriate type of overcurrent protection switch. Note that generated overcurrent may include some amount of direct current.
Some installation sites may require attachment of an earth leakage breaker for the inverter. If no earth leakage breaker is installed, there is a danger of electric shock.
Do not use anything other than a breaker and fuse with the correct capacity. Using a fuse or wire of too large capacity may cause malfunction or fire.
This device is intended for the connection to a power supply system with a maximum permissible system impedance shown in the above table at the interface point (power service box) of
the user's supply.
The user must ensure that this device is connected only to a power supply system which fulfils the requirement above.
If necessary, the user can ask the public power supply company for the system impedance at the interface point.
2
Minimum wire thickness (mm )
Ground-fault interrupter *1
Main cable Branch Ground
1.5 - 1.5 16A 30mA 0.1sec. or less
1.5 - 1.5 16A 30mA 0.1sec. or less
1.5 - 1.5 16A 30mA 0.1sec. or less
6.0 - 6.0 32A 30mA 0.1sec. or less
6.0 - 6.0 32A 30mA 0.1sec. or less
6.0 - 6.0 32A 30mA 0.1sec. or less
2.5 - 2.5 25A 30mA 0.1sec. or less
2.5 - 2.5 25A 30mA 0.1sec. or less
1.5 1.5 1.5 20A current sensitivity *3
2.5 2.5 2.5 30A current sensitivity *3
4.0 4.0 4.0 40A current sensitivity *3
V1
18.6
38
0
Wire thickness
2
1.5 mm
2
2.5 mm
2
4.0 mm
SYSTEM DESIGN
Local swtich (A)
Capacity Fuse
16
16
16
32
32
32
25
25
16
25
32
V2
2.4
1.6
0
V3
48
56
66
Breaker for wiring (A) Max..Permissive
(Non-fuse breaker) System Impedance
16 16
16 16
16 16
32 32
32 32
32 32
25 25
25 25
16 20
25 30
32 40
6000
600
SAMPLE
60
10
1
0.1
0.01
1
2 3 4 6 8 10
C
Rated Tripping current (x)
Sample chart
C7-R Rev.
-
-
-
-
-
-
-
-
-
-
-
20
4 - 7