12
6. Electrical work
Never splice the power cable or the indoor-outdoor connection cable, otherwise it may result in a smoke, a fire or communication failure.
Indoor unit
V1
V2
Type 1
PEFY-P·NMAU, PVFY-P·NAMU
38.0
1.6
Type 2
PKFY-P·NHMU, PKFY-P·NKMU, PEFY-P·NMSU,
PCFY-P·NKMU, PLFY-EP·NEMU, PLFY-P·NFMU,
PMFY-P·NBMU, PKFY-P·NLMU
19.8
2.4
Type 3
PKFY-P·NBMU, PLFY-P·NCMU
3.5
2.4
Type 4
PEFY-P·NMHU, PFFY-P·NEMU, PFFY-P·NRMU
0.0
0.0
Type 5
PEFY-P·NMHSU (connected to PUMY-P60 only)
13.8
4.8
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 = 19.8 × 4/8 + 38 × 1/8
= 14.65
→ 16 A breaker (Tripping current = 8 × 16 A at 0.01 s)
*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 Type4)
+ V2 × (Quantity of Type5) + V3 × (Wire length [km])
G1
Current sensitivity
30 or less
30 mA 0.1 sec or less
100 or less
100 mA 0.1 sec or less
Wire thickness (mm
2
/AWG)
V3
2.1/14
48
3.3/12
56
5.3/10
66
1. Use a separate power supply for the outdoor unit and indoor unit.
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. The power cord size should be 1 rank thicker consideration of voltage drops.
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 60245 IEC57). For exam-
ple, use wiring such as YZW.
6. Install an earth longer than other cables.
Warning:
• Be sure to use specified wires to connect so that no external force is imparted to terminal connections. If connections are not fixed firmly, it may cause
heating or fire.
• Be sure to use the appropriate type of overcurrent protection switch. Note that generated overcurrent may include some amount of direct current.
• Turn on main power when the ambient temperature is -20 °C (-4 °F) or higher.
• In below -20 °C (-4 °F), it needs at least 12hr stand by before the units operate in order to warm the electrical parts.
Caution:
• Some installation site may require attachment of an earth leakage breaker. If no earth leakage breaker is installed, it may cause an electric shock.
• Do not use anything other than breaker and fuse with correct capacity. Using fuse and wire or copper wire with too large capacity may cause a malfunction of
unit or fire.
IMPORTANT
Make sure that the current leakage breaker is one compatible with higher harmonics.
Always use a current leakage breaker that is compatible with higher harmonics as this unit is equipped with an inverter.
The use of an inadequate breaker can cause the incorrect operation of inverter.
6000
600
60
10
1
1
2
3 4
6 8
C
10
20
Sample chart
Tripping T
ime
[s]
Rated Tripping current (x)
0.01
0.1
SAMPLE
Total operating current of the indoor unit
Minimum wire thickness (mm
2
/AWG)
Ground-fault interruper *1
(if you use)
Local switch (A)
Breaker for wiring
(NFB)
Main Cable
Branch
Ground
Capacity
Fuse
F0 = 15 A or less *2
2.1/14
2.1/14
2.1/14
15 A current sensitivity *3
15
15
15
F0 = 20 A or less *2
3.3/12
3.3/12
3.3/12
20 A current sensitivity *3
20
20
20
F0 = 30 A or less *2
5.3/10
5.3/10
5.3/10
30 A current sensitivity *3
30
30
30
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 Type4)/C} + {V1 × (Quantity of Type5)/C}
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