En-2
2.3. Power
WARNING
Always use a special branch circuit and install a special receptacle to supply power to
the room air conditioner.
Use a circuit breaker and receptacle matched to the capacity of the air conditioner.
Do not extend the power cable.
Perform wiring work in accordance with standards so that the air conditioner can be
operated safely and positively.
Install a leakage circuit breaker in accordance with the related laws and regulations
and electric company standards.
The circuit breaker is installed in the permanent wiring. Always use a circuit that can
trip all the poles of the wiring and has an isolation distance of at least 3 mm between
the contacts of each pole.
CAUTION
The power source capacity must be the sum of the air conditioner current and the cur-
rent of other electrical appliances. When the current contracted capacity is insuf
fi
cient,
change the contracted capacity.
When the voltage is low and the air conditioner is dif
fi
cult to start, contact the power
company the voltage raised.
2.4. Electric requirement
CAUTION
Be sure to install a breaker of the speci
fi
ed capacity.
Regulation of cables and breaker differs from each locality, refer in accordance with
local rules.
Voltage rating
1 ø 230 V (50 Hz)
Operating range
198-264 V
Cable
Cable size [mm
2
]
*1
Type
Remarks
Power supply cable
4.0
Type 60245
IEC66
Earth
(Ground), 1ø230V
Connection cable
1.5
Type 60245
IEC57
Earth
(Ground), 1ø230V
*1
Selected sample: Select the correct cable type and size according to the country or
region’s regulations.
Max. wire length: Set a length so that the voltage drop is less than 2%. Increase the
wire diameter when the wire length is long.
Breaker
Speci
fi
cation
*2
Circuit breaker (over current)
Current : 25 (A)
Earth leakage breaker
Leakage current : 30mA 0.1sec or less
*
3
*2
Select the appropriate breaker of the described specification according to the national
or regional standards.
*3
Select the breaker that enough load current can pass through it.
• Before starting work check that power is not being supplied to all poles of the indoor
unit and outdoor unit.
• Install all electrical works in accordance to the national standard.
•
Install the disconnect device with a contact gap of at least 3 mm in all poles nearby the
units. (Both indoor unit and outdoor unit)
• Install the circuit breaker nearby the units.
2.5. Accessories
Name and Shape
Q’ty
Application
Installation Manual
1
This manual
Drain pipe
1
For outdoor unit drain piping work
Adapter assy
12.7mm
→
9.52mm
1
For use when connecting
[ 12 type only ]
2.6. Limitation of refrigerant piping length
CAUTION
The total maximum pipe lengths and height difference of this product are shown in the
table.
If the units are further apart than this, correct operation cannot be guaranteed.
Pipe length
Maximum height
(between indoor and outdoor)
MAX.
MIN.
25 m
5 m
15 m
2.7. Additional charge
Refrigerant suitable for a piping length of 15 m is charged in the outdoor unit at the factory.
When the piping is longer than 15 m, additional charging is necessary.
For the additional amount, see the table below.
Pipe length
15 m
20 m
25 m
Additional amount
None
100 g
200 g
CAUTION
When adding refrigerant, add the refrigerant from the charging port at the completion
of work.
The maximum length of the piping is 25 m. The maximum height difference of the piping
is 15 m, if the units are further apart than these, correct operation cannot be guaran-
teed.
Between 15 m and 25 m, when using a connection pipe other than that in the table, charge
additional refrigerant with 20 g/1 m as the criteria.
2.8. Selecting pipe sizes
The diameters of the connection pipes differ according to the capacity of the indoor unit.
Refer to the following table for the proper diameters of the connection pipes between the
indoor and outdoor units.
Capacity of indoor unit
Gas pipe size
(thickness) [mm]
Liquid pipe size
(thickness) [mm]
12
ø9.52 (0.8)
ø6.35 (0.8)
14, 18
ø12.7 (0.8)
ø6.35 (0.8)
CAUTION
Operation cannot be guaranteed if the correct combination of pipes, valves, etc., is not
used to connect the indoor and outdoor units.
2.9. Heat insulation around connection pipes
requirements
CAUTION
Install heat insulation around both the gas and liquid pipes.
Failure to do so may cause water leaks.
Use heat insulation with heat resistance above 120 °C. (Reverse cycle model only)
In addition, if the humidity level at the installation location of the refrigerant piping is
expected to exceed 70%, install heat insulation around the refrigerant piping. If the
expected humidity level is 70-80%, use heat insulation that is 15 mm or thicker and if
the expected humidity exceeds 80%, use heat insulation that is 20 mm or thicker.
If heat insulation is used that is not as thick as speci
fi
ed, condensation may form on
the surface of the insulation.
In addition, use heat insulation with heat conductivity of 0.045 W/(m·K) or less
(at 20 °C).
Connect the connection pipes according to “5.3. Connecting the piping” in this installation
manual.
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