11
MULTI
Installation of Outdoor Units
6. Field Wiring
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Wiring of Main Power Supply
• Bear in mind ambient conditions (ambient temperature,direct sunlight, rain liquid,etc.) when proceeding with the
wiring and connections
• The wire size is the minimum value for metal conduit wiring. The power cord size should be 1 rank thicker taking
into account the line voltage drops. Make sure the power-supply voltage does not drop more than 10%.
• Specific wiring requirements should adhere to the wiring regulations of the region.
• Power supply cords of parts of appliances for outdoor use should not be lighter than polychloroprene sheathed
flexible cord (design 60245 IEC57).
• Don't install an individual switch or electrical outlet to disconnect each of indoor unit separately from the power
supply.
WARNING
• Make sure to use specified wires for connections so that no external force is imparted to terminal connections.
If connections are not fixed firmly, it may cause heating or fire.
• Make sure to use the appropriate type of overcurrent protection switch. Note that generated overcurrent may
include some amount of direct current.
• All Installation site must 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.
Schematic Diagram of system wiring
Power Line
Communication Line
(Main Switch)
Outdoor
Power Supply
Power Supply
T/B
Indoor Unit Power and Communication T/B
Indoor(A) Indoor(B)
....
Indoor(C)
Indoor Unit
Indoor Unit
Indoor Unit
!!
This System is representative Example.
!! * :
Actual combination of indoor units and BD units
may be different by Product line-up of region or Product Type.
R S T N
Switch
Fuse
R S T
Switch
Fuse
L N
Switch
Fuse
3 Phase
4 Wires
3 Phase
3 Wires
1 Phase
2 Wires
**
**
........
: Power Line
: Communication Line
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*