Wiring Of Main Power Supply And Equipment Capacity - Mitsubishi PUMY-P NHMU-BS Installation Manual

6. Electrical work
M-NET Remote Controller
OC
(51)
TB3
M1M2 S
M1 M2 S
TB7
D
(101)
OC L
3
(53)
TB3
M1M2 S
M1 M2 S
TB7
Power Supply
Unit
M1M2S
G-50A
M1M2 S
Fig. 6-2
A : Group 1
B : Group 3
C : Group 5
D : Shielded Wire
E : Sub Remote Controller
( ): Address

6.4. Wiring of main power supply and equipment capacity

Schematic Drawing of Wiring (Example) (Fig. 6-4)
A
B
~/N 208/230 V
A : Switch (Breakers for Wiring and Current Leakage)
B : Outdoor Unit
C : Pull Box
D : Indoor Unit
Thickness of Wire for Main Power Supply and On/Off Capacities
Model
Outdoor Unit P36, P48 ~/N (single), 60 Hz, 208/230 V
Indoor Unit ~/N (single), 60 Hz, 208/230 V
*1. A breaker with at least 3.0 mm [1/8 inch] contact separation in each poles shall be provided. Use non-fuse breaker (NF) or earth leakage breaker (NV).
*2. Use copper supply wires. Use the electric wires over the rating voltage 300 V.
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 example,
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 heat-
ing or fire.
• Be sure to use the appropriate type of overcurrent protection switch. Note that generated overcurrent may include some amount of direct current.
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.
Never splice the power cable or the indoor-outdoor connection cable, otherwise it may result in a smoke, a fire or communication failure.
10
L
1
A C
IC IC IC
(01) (02) (05)
TB5 TB5 TB5
M1 M2 S M1 M2 S M1 M2 S
ℓ
3
A B A B A B
(105) (155)
RC
RC RC
E
L
4
IC IC IC
(04) (07)
(03)
TB5 TB5 TB5
M1 M2 S M1 M2 S M1 M2 S
A B
(104)
RC
B
~/N 208/230 V
GR
Minimum Wire Thickness
Power Supply
Main Cable*2
5.3 [AWG10]
MA Remote Controller
OC
IC
(51)
(06)
TB3
TB5
M1M2 S
M1 M2 S M1 M2 S
TB7
D
OC
(53)
TB3
M1M2 S
M1 M2 S
TB7
Power Supply
Unit
M1M2 S
G-50A
M1M2 S
A
D D
Fig. 6-4
Breaker for
2
(mm [AWG])
Wiring*1
Ground
5.3 [AWG10] 30 A
Refer to installation manual of indoor unit.
L
1
A
IC IC
m
2
(01) (02)
TB5 TB15 TB5 TB15
M1 M2 S 1 2 M1 M2 S 1 2 M1 M2 S
A B
MA
L L
3 4
IC IC
(03) (04)
TB5 TB15 TB5 TB15
M1 M2 S 1 2 M1 M2 S 1 2 M1 M2 S
A B
MA
B
Fig. 6-3
C
D D
Breaker for Current Minimum cir-
Leakage cuit ampacity
30 A 30 mA 0.1 sec.
26 A
or less
C
IC IC
m
2
(05) (06)
TB5 TB15 TB5 TB15
1 2 M1 M2 S 1 2
m
4
A B A B
MA MA
E
IC
(07)
TB5 TB15
1 2
Maximum rating
of over current
protector device
40 A