25
ENGLISH
NOTE
!
• The figures are based on assumed length of parallel cabling up
to 100m. For length in excess of 100m 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.
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.
!
Point for attention regarding quality of the
public electric power supply
This equipment complies with respectively:
-
EN/IEC 61000-3-11 (1) provided that the system impedance Zsys is
less than or equal to Zmax and
-
EN/IEC 61000-3-12 (2) provided that the short-circuit power Ssc is
greater than or equal to the minimum Ssc alue at the interface point
between the user's supply and the public system. It is the responsibil-
ity of the installer or user of the equipment to ensure, by consultation
with the distribution network operator if necessary, that the equip-
ment is connected only to a supply with respectively:
-
Zsys less than or equal to Zmax and
-
Ssc greater than or equal to the minimum Ssc value.
(1) European / International Technical Standard setting the limits for
voltage changes, voltage fluctuations and flicker in public low-volt-
age supply systems for equipment with rated current ≤75 A.
(2) European / International Technical Standard setting the limits for
harmonic currents produced by equipment connected to public low-
voltage systems with input current >16 A and ≤75 A per phase.
Standard combination of
outdoor units
Zmax (Ω)
Minimum Ssc Value
(kVA)
ARUB080LTE4 - 3921
ARUB100LTE4 - 6415
ARUB120LTE4 - 6415
ARUB140LTE4 - 4964
ARUB160LTE4 - 4964
ARUB180LTE4 - 6994
ARUB200LTE4 - 6994
Wiring of main power supply and equipment
capacity
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