Wiring Of Main Power Supply And Equipment Capacity - Mitsubishi Electric PQRY-P400-500YSGM-A Installation Manual

<Permissible Lengths>
1 M-NET Remote controller
• Max length via outdoor units: L
1
• Max transmission cable length: L
• Remote controller cable length: r
If the length exceeds 10 m, use a 1.25 mm
maximum length and overall length.
2 MA Remote controller
• Max length via outdoor unit (M-NET cable): L
• Max transmission cable length (M-NET cable): L
• Remote controller cable length: c
3 Transmission booster
• Max transmission cable length (M-NET cable): 1 L
Remote controller cable length: r
•

10.4. Wiring of main power supply and equipment capacity

Schematic Drawing of Wiring (Example)
[Fig. 10.4.1] (P.7)
A Switch (breakers for wiring and current leakage)
D Pull box
Thickness of wire for main power supply, On/Off capacities and system impedance
P400
Heat source
P500
16 A or less
Total operating current
25 A or less
of the indoor unit
32 A or less
1. Use a separate power supply for the heat source 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 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 contact separation in each pole shall be provided by the Air conditioner installation.
7. 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 has to ensure that this device is connected only to a power supply system which fulfills the requirement above.
If necessary the user can the ash the public power supply company for the system impedance at the interface point.
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.
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 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.
+ L + L + L and L + L + L + L and L
2 3 4 1 2 3 5
and L + L and L + L and L and L
1 3 4 3 5 6
, r , r , r 10 m (0.3 to 1.25 mm
=
1 2 3 4
+ L + L + L and L + L
1 2 3 4 1
and L + L and L and L
1 3 4 6
and c + c + c and c + c + c
1 1 2 3 1 2
+ L + L + L + L
8 1 2 3
2 L + L + L + L + L
8 1 2 3
3 L
+ L + L + L =
8 1 2 4
4 L
+ L + L + L , L
6 5 3 4 4
, r 2
10 m (0.3 to 1.25 mm )
=
1 2
If the length exceeds 10 m, use 1.25 mm
length and the longest remote length.
B Heat source unit (Compressor unit side)
E Indoor unit
Minimum wire thickness (mm 2 )
Main cable Branch Ground
10.0 10.0 10.0
10.0 10.0 10.0
1.5 1.5 1.5
2.5 2.5 2.5
4.0 4.0 4.0
+ L + L 500 m (1.25 mm 2 or more)
=
1 2 6
+ L 200 m (1.25 mm 2 or more)
=
2 6
2 )
2
shielded wire. The length of this section (L
2
+ L 500 m (1.25 mm or more)
=
2 6
2
+ L 200 m (1.25 mm or more)
=
2 6
+ c 200 m (0.3 to 1.25 mm 2
=
3 4
+ L 200 m (1.25 mm 2 )
=
5 6
+ L 200 m (1.25 mm 2 )
=
5 7
2
200 m (1.25 mm )
2
+ L + L + L 200 m (1.25 mm )
=
3 5 7
2 shielded cable and calculate the length of that portion (L
C BC controller (main)
F Breakers for current leakage
Switch (A) Breaker for
wiring (NFB)
Capacity Fuse
63 63 60
63 63 60
16 16 20
25 25 30
32 32 40
) should be included in the calculation of the
8
)
and L ) as within the total extended
4 7
C' BC controller (sub)
Breaker for current leakage
60 A 100 mA 0.1sec. or less
60 A 100 mA 0.1sec. or less
20 A 30 mA 0.1sec. or less
(apply to EN61000-3-3)
30 A 30 mA 0.1sec. or less
(apply to EN61000-3-3)
40 A 30 mA 0.1sec. or less
(apply to EN61000-3-3)
Max. Permissive
System Impedance
0.32 Ω
0.23 Ω
17