Electrical Wiring - LG HM031M Engineering Product Data Book

7. Electrical Wiring

7.1 Areas of Caution
1. Follow ordinance of your governmental organization for technical standard related to electrical equipment,
wiring regulations and guidance of each electric power company.
WARNING
Be sure to have authorized electrical engineers do the electric work using special circuits in accor-
dance with regulations and this installation manual. If power supply circuit has a lack of capacity or
electric work deficiency, it may cause an electric shock or fire.
2. Install the Unit transmission 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.)
3. Be sure to provide designated grounding work to Unit.
CAUTION
Be sure to correct the unit to earth. Do not connect earth line to any gas pipe, liquid pipe, lightening
rod or telephone earth line. If earth is incomplete, it may cause an electric shock.
4. Give some allowance to wiring for electrical part box of Units, because the box is sometimes removed at the
time of service work.
5. Never connect the main power source to terminal block of transmission line. If connected, electrical parts will
be burnt out.
6. Only the transmission line specified should be connected to the terminal block for Unit transmission.
CAUTION
• This product have reversed phase protection detector that only works when the power is turned on. If
there exists black out or the power goes on and off which the product is operating, attach a reversed
phase protection circuit locally. running the product in reversed phase may break the compressor and
other parts.
• Use the 2-core shield cables for communication lines. Never use them together with power lines.
• The conductive shielding layer of cable should be grounded to the metal part of both units.
• Never use multi-core cable
• 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.
• Introducing with a missing N-phase or with a mistaken N-phase will break the equipment.
Air-to-Water Heat Pump
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