LG Multi V PRHR033 Installation Manual page 34

34
NOTE
!
• The figures are based on assumed length of parallel cabling up to
100 m (328 ft). For length in excess of 100 m (328 ft) 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.
WARNING
!
• Follow ordinance of your governmental organization for technical
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 connections
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
!
• All installation site must 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
capacity. Using fuse and wire or copper wire with too large capacity
may cause a malfunction of unit or fire.
Field Wiring
208/230 V
Example Connection of Communication Cable
1 Outdoor Unit-3Ø, 208/230 V
Power supply
3 Phase 3 Wires
60 Hz 208/230 V
(Main Switch)
R(L1) S(L2) T(L3)
Switch
ELCB
Power supply
1 Phase 60 Hz
208/230 V
L(L1) N(L2)
Power Line
(3 Wires Cable)
ELCB
Power Line
(2 Wires Cable)
Pull box Pull box
(Installer option) (Installer option)
HR unit
Power Line Power Line
(2 Wires Cable) (2 Wires Cable)
WARNING
!
• Indoor Unit ground Lines 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,
momentary blackout or the power goes on and off while the product
is operating, attach a reversed phase protection circuit locally.
Running the product in reversed phase may break the compressor
and other parts.
• When using shielded wires, perform a single-point grounding only to
the outdoor unit for grounding of communication wires.
Between Indoor and Master Outdoor unit
SODU. B SODU. A IDU. B IDU. A CEN. B CEN. A DRY1 DRY2
A B 3(A) 4(B) 3(A) 4(B)
HR unit
[Outdoor Unit]
Communication Line
(2 Wires Cable)
Pull box
(Installer option)
Power Line Power Line
(2 Wires Cable) (2 Wires Cable)
Communication Line
(3 Wires Cable)
[Indoor Units]
Master
GND 12 V
Outdoor Unit
3(A) 4(B) 3(A) 4(B)