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8. Electrical Wiring
8.1 Electrical Wiring
8.1.1 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
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.
2) Install the Outdoor Unit 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.)
3) Be sure to provide designated grounding work to Outdoor Unit.
CAUTION
Be sure to connect the Outdoor Unit to earth. Do not connect earth line to any gas pipe, water 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 Indoor and Outdoor Units, because the box is some-
times removed at the time of service work.
5) Never connect the main power source to terminal block of communication line. If connected, electrical parts
will be burnt out.
6) Use 2-core shield cable for communication line.(
ent systems are wired with the same multiplecore cable, the resultant poor transmitting and receiving will
cause erroneous operations. (
7) Only the communication line specified should be connected to the terminal block for Outdoor Unit communi-
cation.
Outdoor Unit
Outdoor Unit
2-Core Shield Cable
mark in the figure below) If communication lines of differ-
mark in the figure below)
Indoor
Indoor
Unit
Unit
Remote
Remote
control
control
Indoor
Indoor
Unit
Unit
Remote
Remote
control
control
Outdoor Unit
Indoor
Unit
Outdoor Unit
Indoor
Unit
Multi-Core Cable
Indoor
Unit
Remote
Remote
control
control
Indoor
Unit
Remote
Remote
control
control
_ 21
R410A(50/60Hz)
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