WR2-118
PQRY-P-T(S)LMU, Y(S)LMU (April 2017 Ver2)
© 2017 Mitsubishi Electric US, Inc.
10. ELECTRICAL WORK
10-3. Power Cable Specifications
4 - 293
1. Electrical work
DATA U11
S.D.
WR2
MEE15K020
1-3. Power cable specifications
Thickness of wire for main power supply, capacities of the switch and system impedance
Model
Minimum wire thickness (mm
2
/AWG)
Main cable
Branch
Ground
Heat source unit
PQRY-P72TLMU-A
3.3/12
-
3.3/12
PQRY-P96TLMU-A
5.3/10
-
5.3/10
PQRY-P120TLMU-A
8.4/8
-
8.4/8
PQRY-P144TLMU-A
13.3/6
-
13.3/6
PQRY-P168TLMU-A
13.3/6
-
13.3/6
PQRY-P192TLMU-A
21.2/4
-
21.2/4
PQRY-P216TLMU-A
33.6/2
-
33.6/2
PQRY-P240TLMU-A
33.6/2
-
33.6/2
Total operating
current of
the indoor unit
F0 = 15 or less *1
2.1/14
2.1/14
2.1/14
F0 = 20 or less *1
3.3/12
3.3/12
3.3/12
F0 = 30 or less *1
5.3/10
5.3/10
5.3/10
Model
Minimum wire thickness (mm
2
/AWG)
Main cable
Branch
Ground
Heat source unit
PQRY-P72YLMU-A
2.1/14
-
2.1/14
PQRY-P96YLMU-A
2.1/14
-
2.1/14
PQRY-P120YLMU-A
3.3/12
-
3.3/12
PQRY-P144YLMU-A
3.3/12
-
3.3/12
PQRY-P168YLMU-A
5.3/10
-
5.3/10
PQRY-P192YLMU-A
5.3/10
-
5.3/10
PQRY-P216YLMU-A
8.4/8
-
8.4/8
PQRY-P240YLMU-A
13.3/6
-
13.3/6
Total operating
current of
the indoor unit
F0 = 15 or less *1
2.1/14
2.1/14
2.1/14
F0 = 20 or less *1
3.3/12
3.3/12
3.3/12
F0 = 30 or less *1
5.3/10
5.3/10
5.3/10
*1 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
V1
V2
Type1
PLFY-NBMU, PMFY-NBMU, PEFY-NMSU, PCFY-NKMU,
PKFY-NHMU, PKFY-NKMU
18.6
2.4
Type2
PEFY-NMAU
38
1.6
Type3
PEFY-NMHSU
13.8
4.8
Others
Other indoor unit
0
0
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-NMSU × 4 + PEFY-NMAU × 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)
*2 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
Wire thickness
V3
30 or less
30 mA 0.1sec or less
1.5 mm
2
48
100 or less
100 mA 0.1sec or less
2.5 mm
2
56
4.0 mm
2
66
1. Use dedicated power supplies for the heat source 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%. Make sure that the voltage imbalance between the phases is 2% or less.
4. Specific wiring requirements should adhere to the wiring regulations of the region.
5. Power supply cords of parts of appliances for heat source 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 [1/8 in.] 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.
The breakers for current leakage should support Inverter circuit. (e.g. Mitsubishi Electric's NV-C series or equivalent). If no earth leakage breaker is installed, it may cause an electric shock.
Breakers for current leakage should combine using of switch.
Do not use anything other than a breaker with the correct capacity. Using a breaker of too large capacity may cause malfunction or fire.
If a large electric current flows due to malfunction or faulty wiring, earth-leakage breakers on the unit side and on the upstream side of the power supply system may both operate.
Depending on the importance of the system, separate the power supply system or take protective coordination of breakers.
20
C
10
8
6
4
3
2
1
0.01
0.1
1
10
60
600
6000
SAMPLE
Tri
pping
Tim
e
[s
]
Rated Tripping current (x)
Sample chart
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