Wiring Of Main Power Supply And Equipment Capacity; Control Box And Connecting Position Of Wiring; Communication And Power Cables - LG ARUN050LMC0 Installation Manual

!
CAUTION
When the 400 volt power supply is applied to "N" phase by mistake,
check damaged parts in control box and replace them.

Control box and connecting position of wiring

- Remove all of the screws at front panel and remove the panel by
pulling it forward.
- Connect to Communication wire on terminal block (From Compressor
module, Heat Exchanger Module and Indoor Unit)
- When the central control system is connected to the outside unit, a
dedicated PCB must be connected between them.
- When connecting communication cable between outside unit and
indoor units with shielded cable, connect the shield ground to the
earth screw.
Front panel
!
WARNING
The temperature sensor for outdoor air should not be exposed to
direct sunlight.
- Provide an appropriate cover to intercept direct sunlight.
Noise PCB
Main PCB
Terminal block
(Take care of the phase
sequence of 3-phase
4-wire power system)
Display PCB Inverter PCB
www.lgcomfortcooling.co.uk

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 300m
Remote control cable
- Types : 3-core cable
Central control cable
Product type Cable 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
interference in the signal wiring caused by electrostatic and
electromagnetic 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
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
distortion 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
communication cables should not be bunched together.
!
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
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.
Diameter
1.0~1.5mm
1.0~1.5mm
1.0~1.5mm
Spacing
10A 300mm
50A 500mm
100A 1000mm
1500mm
21
2
2
2