21
ENGLISH
[Heat pump]
UX3
UX2
Main PCB
Noise Filter
External PCB
Take care of the
phase sequence of
3-phase 4-wire
power system
WARNING
The temperature sensor for outdoor air should not be exposed to
direct sunlight.
- Provide an appropriate cover to intercept direct sunlight.
!
Communication and Power Cables
Communication cable
- Types : shielding cable
- Cross section : 1.0~1.5mm
2
- Maximum allowable temperature: 60°C
- Maximum allowable cable length: under 1000m
Remote control cable
- Types : 3-core cable
Central control cable
Separation of communication and power cables
- If communication and power cables are run alongside each other then
there is a strong likelihood of operational faults developing due to in-
terference in the signal wiring caused by electrostatic and electro-
magnetic coupling.
The tables below indicates our recommendation as to appropriate
spacing of communication and power cables where these are to be
run side by side
NOTE
!
• The figures are based on assumed length of parallel cabling up
to 100m. For length in excess of 100m the figures will have to
be recalculated in direct proportion to the additional length of
cable involved.
• If the power supply waveform continues to exhibit some distor-
tion the recommended spacing in the table should be increased.
- If the cable are laid inside conduits then the following point
must also be taken into account when grouping various cable
together for introduction into the conduits
- Power cable(including power supply to air conditioner) and
communication cables must not be laid inside the same
- In the same way, when grouping the power wires and com-
munication cables should not be bunched together.
Product type
Cable type
Diameter
ACP&AC Manager
2-core cable (Shielding cable)
1.0~1.5mm
2
AC Smart
2-core cable (Shielding cable)
1.0~1.5mm
2
Simple central controller
4-core cable (Shielding cable)
1.0~1.5mm
2
Current capacity of power cable
Spacing
100V or more
10A
300mm
50A
500mm
100A
1000mm
Exceed 100A
1500mm
CAUTION
If apparatus is not properly earthed then there is always a risk of
electric shocks, the earthing of the apparatus must be carried out by
a qualified person.
!
Wiring of main power supply and equipment
capacity
- Use a separate power supply for the Outdoor 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.
- 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.
Ground wire
1
The power wire Between the master outdoor unit and slave1 out-
door unit - minimum : 6 mm
2
2
The power wire Between the slave1 outdoor unit and slave2 out-
door unit - minimum : 4 mm
2
3
The power wire Between the slave2 outdoor unit and slave3 out-
door unit - minimum : 2.5 mm
2
h
The above standard is CV wire standard.
h
Please use the 3-phase 4-wire quadrupole Leakage circuit breaker of
circuit breaker.
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.
!
The thickness of Minimum wire (mm
2
)
Leakage cir-
cuit breaker
(4P ELCB)
Main power
wire
Branch wire Ground wire
1 Unit
2.5~6
-
2.5
Below 30~50A
100mA 0.1sec
2 Unit
10~16
-
2.5
Below 75~100A
100mA 0.1sec
3 Unit
25~35
-
4
Below 125~150A
100mA 0.1sec
4 Unit
70
-
6
Below 175~200A
100mA 0.1sec
