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Installation of Outside Unit
5. Electrical Wiring
5.1 General Instruction
Outdoor Unit
Outdoor Unit
Outdoor Unit
Outdoor Unit
Outdoor Unit
Outdoor Unit
• Follow ordinance of local regulation for technical standard related to electrical equipment, wiring regulations and guidance
of each electric power company.
• Be sure to provide designated grounding work to installed unit.
• Give some allowance to wiring for electrical part box of units, because the box is sometimes removed at the time of service
work.
• Only the communication line specified should be connected to the terminal block for unit communication.
< ! > WARNING
• Be sure to have authorized electrical engineers do the electric work using special circuits in accordance with regulations
and installation manual. If power supply circuit has a lack of capacity or electric work deficiency, it may cause an electric
shock or fire.
• Be sure to connect the installed 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.
< ! > CAUTIONS
• Product which use 3-phase power source 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.
• 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.
Indoor
Indoor
Unit
Unit
Remote
Remote
control
control
Indoor
Indoor
Unit
Unit
Remote
Remote
control
control
Indoor
Indoor
Unit
Unit
Remote
Remote
control
control
Indoor
Indoor
Unit
Unit
Remote
Remote
control
control
Indoor
Unit
Remote
control
Indoor
Unit
Remote
control
Outdoor Unit
Outdoor Unit
Outdoor Unit
Outdoor Unit
Outdoor Unit
Indoor
Unit
※ This figure is representative. Actual appearance of outdoor unit may be different
by product type, but schematic diagram will stay the same.
17
Installation
Indoor
Indoor
Unit
Unit
Remote
control
Indoor
Indoor
Unit
Unit
Remote
Remote
control
control
Indoor
Indoor
Unit
Unit
Remote
Remote
control
control
Indoor
Unit
Remote
control
Remote
control
Remote
control
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