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Electrical Wiring
• 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 accordance 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.
• 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.)
• 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.
• Give some allowance to wiring for electrical part box of Units, because the box is sometimes
removed at the time of service work.
• Never connect the main power source to terminal block of transmission line. If connected,
electrical parts will be burnt out.
• 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
INSTALLATION
47
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