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ENGLISH
- Use a separate power supply for the Outdoor Unit and Indoor Unit.
- Bear in mind ambient conditions (ambient temperature,direct
sunlight, rain water,etc.) when proceeding with the wiring and
connections.
- The cable 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.
- Don't install an individual switch or electrical outlet to disconnect
each of indoor unit separately from the power supply.
• 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.
WARNING
• Follow ordinance of your governmental organization for
technical standard related to electrical equipment, wiring
regulations and guidance of each electric power company.
• Make sure to use specified cables 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.
!
Single outdoor unit
R S T N
Switch
Fuse
L
N
Communication cable
(2-wire Cable)
Power cable
(4-wire Cable)
Communication cable
(3-wire Cable)
Power cable
(2-wire Cable)
Power cable
(2-wire Cable)
Power cable
(2-wire Cable)
Power cable
(2-wire Cable)
Power cable
(2-wire Cable)
[Outdoor Unit]
[Indoor Units]
Outdoor
Power supply
(3-phase 4-wire)
Indoor
Power supply
(1-phase 2-wire)
(Main Switch)
Pull Box
(Installer option)
Pull Box
(Installer option)
Pull Box
(Installer option)
Pull Box
(Installer option)
Frequency
Voltage range(V)
Outdoor Indoor
60 Hz 380 V 220 V
50 Hz 380~415 V 220~240 V
Master
Outdoor Unit
SODU. B SODU. A IDU. B IDU. A CEN. B CEN. A DRY1 DRY2 GND 12V
34 34 34
[Heat Pump]
Between Indoor and Master Outdoor unit
The GND terminal at the
main PCB is a ‘-’ terminal
for day contact, it is not
the point to make ground
connection.
Example) Connection of transmission wire
[BUS type] [STAR type]
- Connection of communication
cable must be installed like
below figure between indoor
unit to outdoor unit.
- Abnormal operation can be
caused by communication
defect, when connection of
communication cable is installed
like below figure(STAR type).
WARNING
•
Indoor Unit ground wires are required for preventing electrical shock
accident during current leakage, Communication disorder by noise
effect and motor current leakage (without connection to pipe).
• Don't install an individual switch or electrical outlet to disconnect
each of indoor unit separately from the power supply.
• Install the main switch that can interrupt all the power sources in an
integrated manner because this system consists of the equipment
utilizing the multiple power sources.
• If there exists the possibility of reversed phase, lose phase,
momentary blackout or the power goes on and off while the
product is operating, attach a reversed phase protection circuit
locally. Running the product in reversed phase may break the
compressor and other parts.
!
Example) Connection of power and communication cable
Insulation
sleeves
attachment
Power/
Ground
cable
Power/
Ground cable
Communication
cable
Over 50 mm gap
Main power
Terminal block
Ground
cable
ODU-IDU
Commun-
ication cable
Front side Right side
Field Wiring
Wiring of main power supply and equipment
capacity
CAUTION
!
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