Communication And Power Cables; Wiring Of Main Power Supply And Equipment Capacity - LG MULTI V IV PRO ARUN220LLN4 Installation Manual

! WARNING
The temperature sensor for outdoor air should not be exposed to
direct sunlight.
- Provide an appropriate cover to intercept direct sunlight.
[Heat pump]
UX5
Main PCB
External PCB
Terminal Block
(Take care of the
phase sequence of
3-phase 4-wire
power system)

Communication and Power Cables

Communication cable
- Types : shielding cable
- Cross section : 1.0~1.5 mm 2
- Maximum allowable temperature: 60 °C
- Maximum allowable cable length: under 1,000 m
Remote control cable
- Types : 3-core cable
Central control cable
Product type
ACP 2-core cable (Shielding cable)
AC Smart 2-core cable (Shielding cable)
AC Ez 4-core cable (Shielding 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
Current capacity of power cable
100V or more
Exceed 100A
!
NOTE
• The figures are based on assumed length of parallel cabling up
to 100 m. For length in excess of 100 m 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.
UX6
Cable type Diameter
1.0~1.5mm
1.0~1.5mm
1.0~1.5mm
Spacing
10A 300mm
50A 500mm
100A 1000mm
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.
! 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.
! CAUTION
2
• Some installation site may require attachment of an earth leakage
2 breaker. If no earth leakage breaker is installed, it may cause an
electric shock.
2
• 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.
23