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22
ENGLISH
Wiring of main power supply and equipment
capacity
- Use a separate power supply for the Outside Unit and Indoor Unit.
- Bear in mind ambient conditions (ambient temperature,direct sun-
light, rain water,etc.) when proceeding with the wiring and connec-
tions.
- 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.
- Don't install an individual switch or electrical outlet to disconnect
each of indoor unit separately from the power supply.
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 ca-
pacity. 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 techni-
cal 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 connec-
tions 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.
!
Master
Outside 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 Outside unit
The GND terminal at the
main PCB is a ‘-’ terminal
for day contact, it is not
the point to make ground
connection.
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, mo-
mentary blackout or the power goes on and off while the product is
operating, attach a reversed phase protection circuit locally. Run-
ning the product in reversed phase may break the compressor and
other parts.
!
Field Wiring
208/230V
Example Connection of Communication Cable
1 Outdoor Unit-3Ø, 208/230V
Switch
ELCB
Communication Line
(2 Wires Cable)
Power Line
(3 Wires Cable)
Communication Line
(3 Wires Cable)
Power Line
(2 Wires Cable)
Power Line
ELCB
(2 Wires Cable)
Power Line
(2 Wires Cable)
Power Line
(2 Wires Cable)
Power Line
(2 Wires Cable)
[Outdoor Unit]
[Indoor Units]
Power supply
3 Phase 3 Wires
60Hz 208/230V
Power supply
1 Phase 60Hz
208/230V
(Main Switch)
Pull box
(Installer option)
Pull box
(Installer option)
Pull box
(Installer option)
L(L1) N(L2)
RST
2 Outdoor Units-3Ø, 208/230V
When the power source is connected In series between the units.
When the power source is supplied to Each outdoor unit individually.
Communication Line
(2 Wires Cable)
Power Line
(3 Wires Cable)
Communication Line
(3 Wires Cable)
Power Line
(2 Wires Cable)
Power Line
(2 Wires Cable)
Power Line
(2 Wires Cable)
Power Line
(2 Wires Cable)
Power Line
(2 Wires Cable)
[Master]
[Indoor Units]
(Main Switch)
[Slave]
Pull Box
(Installer option)
Pull Box
(Installer option)
Pull Box
(Installer option)
Pull Box
(Installer option)
nication L
es Cable
Com
Power
(2 Wires
Pow
(2 Wires C
r Line
(2 Wires Cab
[
Slave]
Power L
Wire
Power supply
3 Phase 3 Wires
60Hz 208/230V
Power supply
1 Phase 60Hz
208/230V
RST
Switch
ELCB
ELCB
L(L1) N(L2)
Switch
Communication Line
(2 Wires Cable)
Power Line
(3 Wires Cable)
Communication Line
(3 Wires Cable)
Power Line
(2 Wires Cable)
Power Line
(2 Wires Cable)
Power Line
(2 Wires Cable)
Power Line
(2 Wires Cable)
[Master]
[Indoor Units]
Power supply
3 Phase 3 Wires
60Hz 208/230V
Power supply
1 Phase 60Hz
208/230V
(Main Switch)
[Slave]
Switch
ELCBELCB
Pull box
(Installer option)
Pull box
(Installer option)
Pull box
(Installer option)
Power Line
(2 Wires Cable)
ELCB
L(L1) N(L2)
RST RST
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