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74
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Electrical wiring
Electrical installation work must be performed by an electrical installation service provider qualified by a power provider of the country.
Electrical installation work must be executed according to the technical standards and other regulations applicable to electrical
installations in the country.
1
Do not use any supply cord lighter than one specified in parentheses for each type below.
¡
braided cord (code designation 60245 IEC 51),
¡
ordinary tough rubber sheathed cord (code designation 60245 IEC 53)
¡
flat twin tinsel cord (code designation 60227 IEC 41);
Do not use anything lighter than polychloroprene sheathed flexible cord (code designation 60245 IEC57) for supply cords of
parts of appliances for outdoor use.
2
Ground the unit. Do not connect the grounding wire to a gas pipe, water pipe, lightning rod or telephone grounding wire.
If improperly grounded, an electric shock or malfunction may result.
3
A grounding wire must be connected before connecting the power cable. Provide a grounding wire longer than the power cable.
4
The installation of an impulse withstanding type earth leakage breaker is necessary. A failure to install an earth leakage breaker
can result in an accident such as an electric shock or a fire.
5
Do not turn on the power until the electrical work is completed.
6
Do not use a condensive capacitor for power factor improvement under any circumstances. (It does not improve power factor,
while it can cause an abnormal overheat accident)
7
For power supply cables, use conduits.
8
Do not lay electronic control cables (remote control and signaling wires) and other cables together outside the unit. Laying
them together can result in the malfunctioning or a failure of the unit due to electric noises.
9
Fasten cables so that may not touch the piping etc.
0
When cables are connected, please make sure that all electrical components within the electrical component box are free of
loose connector coupling or terminal connection and then attach the cover securely. (Improper cover attachment can result in
malfunctioning or a failure of the unit, if water penetrates into the box.)
(a)
Connect a pair bearing a common terminal number with an indoor-outdoor connecting wire.
(b)
In cabling, fasten cables securely with cable clamps so that no external force may work on terminal connections.
(c)
Grounding terminals are provided in the control box.
Model
302
series
20
16
3.5
ø1.6 mm
ø1.6 mm
×
3
Power source
1phase
220-240V
50Hz
Power cable
thickness
(mm
2
)
Grounding wire
thickness
Max. over
current
(A)
Indoor-outdoor
wire thickness
×
number
Cable length
(m)
Earth leakage breaker
(Harmonic resistant type)
Remote controller
Indoor unit
Outdoor unit
Switchgear or circuit breaker
Power cable, indoor-outdoor connecting wires
●
Always perform grounding system installation work
with the power cord unplugged.
CAUTION
Always use an earth leakage circuit breaker designed for
inverter circuits to prevent a faulty operation.
Notes (1) The specifications shown in the above table are for units without heaters. For units with heaters, Please refer to the installation instructions or the
construction instructions of the indoor unit.
(2) Switchgear or circuit breaker capacity which is calculated from MAX. over current should be chosen along the regulations in each country.
(3) The cable specifications are based on the assumption that a metal or plastic conduit is used with no more than three cables contained in conduit and
a voltage drop is 2%. For an installation falling outside of these conditions, please follow the internal cabling regulations. Adapt it to the regulation
in effect in each country.
Grounding terminal
⁄
It is stuck on control box cover.
⁄
Fasen cables so that terminal connections are
not subjected to external force.
Wiring diagram
Wiring clamp
Power source,signal line and ground terminal block
