20
ENGLISH
NOTE
!
• The figures are based on assumed length of parallel cabling up
to 100m(328ft). For length in excess of 100m(328ft) the figures
will have to be recalculated in direct proportion to the additional
length of cable involved.
• If the power supply waveform continues to exhibit some distor-
tion the recommended spacing in the table should be increased.
- If the cable are laid inside conduits then the following point
must also be taken into account when grouping various cable
together for introduction into the conduits
- Power cable(including power supply to air conditioner) and
communication cables must not be laid inside the same
- In the same way, when grouping the power wires and com-
munication cables should not be bunched together.
Current capacity of power cable Spacing
100V or more
10A 300m(11-13/16 inch)
50A 500m(19-11/16 inch)
100A 1,000m(39-3/8 inch)
Exceed 100A 1,500m(59-1/16 inch)
CAUTION
If apparatus is not properly earthed then there is always a risk of
electric shocks, the earthing of the apparatus must be carried out by
a qualified person.
!
- Use a separate power supply for the Outdoor Unit and Indoor Unit.
- Bear in mind ambient conditions (ambient temperature,direct sun-
light, rain water,etc.) when proceeding with the wiring and connec-
tions.
- The cable size is the minimum value for metal conduit wiring. The
power cord size should be 1 rank thicker taking into account the line
voltage drops. Make sure the power-supply voltage does not drop
more than 10%.
- Specific wiring requirements should adhere to the wiring regulations
of the region.
- Power supply cords of parts of appliances for outdoor use should not
be lighter than polychloroprene sheathed flexible cord.
- Don't install an individual switch or electrical outlet to disconnect
each of indoor unit separately from the power supply.
CAUTION
• Some installation site may require attachment of an earth leakage
breaker. If no earth leakage breaker is installed, it may cause an
electric shock.
• Do not use anything other than breaker and fuse with correct ca-
pacity. Using fuse and wire or copper wire with too large capacity
may cause a malfunction of unit or fire.
!
WARNING
• Follow ordinance of your governmental organization for techni-
cal standard related to electrical equipment, wiring regulations
and guidance of each electric power company.
• Make sure to use specified cables for connections so that no
external force is imparted to terminal connections. If connec-
tions are not fixed firmly, it may cause heating or fire.
• Make sure to use the appropriate type of overcurrent protection
switch. Note that generated overcurrent may include some
amount of direct current.
!
Single outdoor unit
WARNING
•
Indoor Unit ground wires are required for preventing electrical shock ac-
cident during current leakage, Communication disorder by noise effect
and motor current leakage (without connection to pipe).
• Don't install an individual switch or electrical outlet to disconnect
each of indoor unit separately from the power supply.
• Install the main switch that can interrupt all the power sources in an
integrated manner because this system consists of the equipment
utilizing the multiple power sources.
• If there exists the possibility of reversed phase, lose phase, mo-
mentary blackout or the power goes on and off while the product is
operating, attach a reversed phase protection circuit locally. Run-
ning the product in reversed phase may break the compressor and
other parts.
!
Field Wiring
Wiring of main power supply and equipment
capacity
Communication and Power Cables
Communication cable
- Types : shielding cable
- Cross section : 1.0~1.5mm
2
(1.55x10
-3
~2.32x10
-3
in
2
)
- Maximum allowable temperature: 140°F
- Maximum allowable cable length: under 1,000m(3,281ft)
Remote control cable
- Types : 3-core cable
Central control cable
Separation of communication and power cables
- If communication and power cables are run alongside each other then
there is a strong likelihood of operational faults developing due to in-
terference in the signal wiring caused by electrostatic and electro-
magnetic coupling.
The tables below indicates our recommendation as to appropriate
spacing of communication and power cables where these are to be
run side by side
Product type Cable type Diameter
ACP
2-core cable
(Shielding cable)
1.0~1.5mm
2
(1.55x10
-3
~2.32x10
-3
in
2
)
AC Smart
2-core cable
(Shielding cable)
1.0~1.5mm
2
(1.55x10
-3
~2.32x10
-3
in
2
)
AC Ez
4-core cable
(Shielding cable)
1.0~1.5mm
2
(1.55x10
-3
~2.32x10
-3
in
2
)
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