Wiring Of Main Power Supply And Equipment Capacity - Mitsubishi Electric Y Série Manuel D'installation

11.4. Wiring of main power supply and equipment capacity

Schematic Drawing of Wiring (Example)
[Fig. 11.4.1]
B
3~208–230V
L , L , L
1 2 3
B
~208–230V
L, N
A Switch (Breakers for wiring and current leakage)
D Pull box
Thickness of wire for main power supply, on/off capacities
<Power source: 208/230V>
Model Unit combination
PUHY-HP72TJMU-A
PUHY-HP96TJMU-A
PUHY-HP72TJMU-A
Outdoor
PUHY-HP144TSJMU-A
unit
PUHY-HP72TJMU-A
PUHY-HP96TJMU-A
PUHY-HP192TSJMU-A
PUHY-HP96TJMU-A
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 [1/8 in] contact separation in each pole shall be provided by the Air conditioner installation.
Warning:
• 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.
Caution:
• A breaker for current leakage must be attached to the power supply. If no earth leakage breaker is installed, it may cause an 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.
A
C
Ground
A
E E
Ground Ground Ground
B Breakers for current leakage
E Indoor unit
Minimum wire thickness (mm
Main cable Branch
21.2 [4] / 13.3 [6] -
33.6 [2] / 21.2 [4] -
21.2 [4] / 13.3 [6] -
21.2 [4] / 13.3 [6] -
33.6 [2] / 21.2 [4] -
33.6 [2] / 21.2 [4] -
D
E E
Ground
2 [AWG]) Switch (A)
Capacity Fuse
Ground
21.2 [4] / 13.3 [6] 60 60
33.6 [2] / 21.2 [4] 75 75
21.2 [4] / 13.3 [6] 60 60
21.2 [4] / 13.3 [6] 60 60
33.6 [2] / 21.2 [4] 75 75
33.6 [2] / 21.2 [4] 75 75
C Outdoor unit
Breaker
Breaker for MCA
for wiring
current leakage (A)
(NFB)(A)
60A 100mA
60 59/54
0.1sec. or less
75A 100mA
75 74/68
0.1sec. or less
60A 100mA
60 59/54
0.1sec. or less
60A 100mA
60 59/54
0.1sec. or less
75A 100mA
75 74/68
0.1sec. or less
75A 100mA
75 74/68
0.1sec. or less
MOCP
(A)
101/92
127/116
101/92
101/92
127/116
127/116
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