Electrical Wiring - LG LMN078HVT Installation & Maintenance

ELECTRICAL WIRING

• All power wiring and communication cable installation must be
performed by trained service providers working in accordance with
local, state, and National Electrical Code regulations related to
electrical equipment and wiring, and following the instructions in
this manual. Electric shock can cause physical injury or death.
• Undersized wiring may lead to unacceptable voltage at the unit and
may cause a fire hazard.
• Properly ground the Multi Zone outdoor and indoor units. Ground
wiring must always be installed by a trained technician Ground wiring
is required to prevent accidental electrical shock during current
leakage.
• Do not connect ground wire to refrigerant, gas, or water piping;
to lightning rods; to telephone ground wiring; or to the building
plumbing system. Failure to properly provide a National Electrical
Code-approved earth ground can result in electric shock, physical
injury or death.
• Verify that the branch switch and circuit breaker are set to OFF
before installing the wiring system. Electric shock can cause physi-
cal injury or death.
• Install appropriately sized breakers / fuses / overcurrent protection
switches and wiring in accordance with local, state, and National
Electrical Code regulations related to electrical equipment and wir-
ing, and following the instructions in this manual. Using an over-
sized breaker or fuse may result in electric shock, physical injury or
death.
38
Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. "LG" is a registered trademark of LG Corp.
• Consider ambient conditions (temperature, direct sunlight, inclem-
ent weather, etc.) when selecting, installing, and connecting the
power wiring.
• Properly ground the Multi Zone outdoor and indoor unit. Improperly
grounded wire can cause communication problems from electrical
noise, and motor current leakage. Ground wiring must always be
installed by a trained technician.
• If the system operates in reversed phase, it may damage the com-
pressors and other components.
• If there is a possibility of reversed phase, phase loss, momentary
blackout, or the power goes on and off while the system is
operating, install a field-supplied phase loss protection circuit.
• Do not connect ground wire to refrigerant, gas, or water piping;
to lightning rods; to telephone ground wiring; or to the building
plumbing system. Failure to properly provide a National Electrical
Code-approved earth ground can result in property damage and
equipment malfunction.
• Install appropriately sized breakers / fuses / overcurrent protection
switches and wiring in accordance with local, state, and National
Electrical Code regulations related to electrical equipment and
wiring, and following the instructions in this manual. Using an
oversized breaker or fuse may result in equipment malfunction and
property damage.
• Use only copper wiring that is stranded and shielded with the wires
separately insulated.
• Do not use a multi-conductor cable with more than five (5)
wires in one (1) core.
• Power wiring and communications cable sizes must comply with
applicable federal UL / ETL, state, and local codes.
• Do not operate the air conditioning system until the refrigerant
piping installation is complete. Operating the system before refrig-
erant piping is finalized may damage the compressor.
• Install a ground wire for the outdoor units, indoor units, and branch
distribution units.
• Install a main shutoff switch or circuit breaker that interrupts all
power sources simultaneously (circuit breaker should be resistant
to electromagnetic currents).
• Use ring terminals to attach the wiring. Verify that all power wiring
and communications cable terminals are securely attached. Ensure
enough slack is included in the wiring and cables to avoid damag-
ing the connections.
• Use a conduit to protect the power wiring.
F
MULTI
F
MULTI MAX