LG A2UW18GFAC Manual page 165

MULTI
5. Electrical Wiring
a reversed phase protection circuit locally. Running the product in reversed phase may break the compressor
and other parts.
• Install the communication line away from the power source wiring so that it is not affected by electric noise from
the power source. (Do not run it through the same conduit.) Never use them together with power cables.
• Never use multi-core cable. If communication lines of different systems are wired with the same multiplecore
cable, the resultant poor transmitting and receiving will cause erroneous operations.
• The conductive shielding layer of cable should be grounded to the metal part of both units.
• As this unit is equipped with an inverter, to install a phase leading capacitor not only will deteriorate power factor
improvement effect, but also may cause capacitor abnormal heating. Therefore, never install a phase leading
capacitor.
• Make sure that the power unbalance ratio is not greater than 2%. If it is greater, the unit's lifespan will be
reduced.
• Never connect the main power source to terminal block of communication line. If connected, electrical parts will
be burnt out.
• Introducing with a missing "N" phase or with a mistaken "N" phase will break the equipment.
When the power supply is applied to "N" phase by mistake, replace inverter PCB and transformer in control box.
■ Communication and Power Lines
• Communication cable
– Types : shielded cables
– Use wires of size : over 1.0 ~ 1.5 mm
– Maximum allowable temperature of cable : over 60°C (140℉)
– Maximum allowable line length: under 1,000m
• Remote control cable
– Types : 3-core cable
• Central control cable
– Please check the model function table for compatibility with central controller.
Product type
ACP&AC Manager
AC Smart
Simple central controller
AC Ez
• Separation of communication and power lines
– If communication and power lines are installed 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 lines
where these are to be run side by side
100V or more
2
2-core cables (shielded)
2-core cables (shielded)
4-core cables (shielded)
4-core cables (shielded)
Current capacity of power line
Wire type
10A
50A
100A
Exceed 100A
Installation of Outdoor Units
Diameter
2
1.0 ~ 1.5 mm
2
1.0 ~ 1.5 mm
2
1.0 ~ 1.5 mm
2
1.0 ~ 1.5 mm
Spacing
300mm
500mm
1,000mm
1,500mm
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