POWER
WARNING
(1)
The rated voltage of this product is 230 V AC 50 Hz.
(2)
Before turning on the power, check if the voltage is within the
220 V -10 % to 240 V +10 % range.
(3)
Always use a special branch circuit and install a special recepta-
cle to supply power to the room air conditioner.
(4)
Use a circuit breaker and receptacle matched to the capacity of
the air conditioner.
(5)
Do not extend the power supply cord and connection cord.
(6)
Perform wiring work in accordance with standards so that the
air conditioner can be operated safely and positively.
(7)
Install a leakage circuit breaker in accordance with the related
laws and regulations and electric company standards.
(1) Remove the outdoor unit connector cover.
(2) Bend the end of the cord as shown in the figure.
(3) Connect the end of the connection cord fully into the
terminal block.
(4) Fasten the sheath with a cord clamp.
(5) Install the connector cover.
Fig. 3
Connection cord
Cord clamp
Control box
Fig. 4
Connection cord
Connection cord wiring
Run the connection cord to the rear of the outdoor unit within
the
A
range of the arrows shown in the figure.
(The connector cover becomes difficult to install.)
Control box cover
1
2
3
L
N
1
2
3
4
Outdoor unit terminal block
Indoor unit terminal block
Connection cord
Earth screw
Earth screw
20mm
12mm
5mm
5mm
12mm
20mm
Cord clamp
Earth
screw
20mm
12mm
5mm
5mm
12mm
20mm
(1) Match the terminal block numbers and connection cord
colors with those of the indoor unit.
Erroneous wiring may cause burning of the electric
parts.
(2)
Connect the connection cords firmly to the terminal block.
Imperfect installation may cause a fire.
(3) Always fasten the outside covering of the connection
cord with the cord clamp. (If the insulator is chafed,
electric leakage may occur.)
(4) Securely earth the power cord.
(5)
Do not use the earth screw for an external connector.
Only use for interconnection between two units.
CAUTION
MODEL
9,000 ~12,000 BTU class
Power supply cord (mm
2
)
1.5
Connection cord (mm
2
)
1.5
Fuse capacity (A)
20
• Install the disconnect device with a contact gap of at least
3 mm nearby the units. (Both indoor unit and outdoor unit)
• Always make the air conditioner power supply a special branch
circuit and provide a special breaker.
• Always use H07RN-F or equivalent as the power supply cord
and the connection cord.
CONNECTION
(1) Install the outdoor unit wall cap (supplied with the optional installation set
or procured at the site) to the wall pipe.
(2) Connect the outdoor unit and indoor unit piping.
(3) After matching the center of the flare surface and tightening the nut hand
tight, tighten the nut to the specified tightening torque with a torque wrench.
(Table 2)
FLARING
(1) Cut the connection pipe to the necessary
length with a pipe cutter.
(2) Hold the pipe downward so that cuttings
will not enter the pipe and remove the
burrs.
(3) Insert the flare nut onto the pipe and flare
the pipe with a flaring tool.
Insert the flare nut (always use the flare nut
attached to the indoor and outdoor units
respectively) onto the pipe and perform the
flare processing with a flare tool.
Use the special R410A flare tool, or the conv-
entional (for R22) flare tool.
When using the conventional flare tool, always
use an allowance adjustment gauge and secure
the A dimension shown in table 3 .
BENDING PIPES
(1) When bending the pipe, be careful not to crush it.
(2) To prevent breaking of the pipe, avoid sharp bends.
Bend the pipe with a radius of curvature of 70mm or over.
(3) If the copper pipe is bend the pipe or pulled to often, it will become stiff.
Do not bend the pipes more than three times at one place.
CONNECTING THE PIPING
Check if [L] is flared uniformly
and is not cracked or scratched.
Fig. 5
Die
A
Pipe
Tighten with two wrenches.
Torque
wrench
Wrench (fixed)
Flare nut
Indoor unit pipe
Connection pipe
To prevent gas leakage, coat the flare
surface with refrigerator oil.
1.
Check if the piping connections are secure.
2.
Check that the stems of 2-way valve and 3-way valve are closed fully.
3.
Connect the gauge manifold charge hose to the charging port of the 3-
way valve (side with the projection for pushing in the valve core).
4.
Open the low pressure side valve of the gauge manifold fully.
5.
Operate the vacuum pump and start pump down.
6.
Slowly loosen the flare nut of the 3-way valve and check if air enters,
then retighten the flare nut.
(When the flare nut is loosened the operating sound of the vacuum
pump changes and the reading of the compound pressure gauge goes
from minus to zero.)
AIR PURGE
Always use a vacuum pump to purge the air.
Refrigerant for purging the air is not charged in the
outdoor unit at the factory.
Close the high pressure side valve of the gauge manifold fully and do
not operate it during the following work.
7.
Pump down the system for at least 15 minutes, then check if the com-
pound pressure gauge reads -0.1 MPa (-76 cmHg, -1 bar).
8.
At the end of pump down, close the low pressure side gauge of the
gauge manifold fully and stop the vacuum pump.
9.
Slowly loosen the valve stem of the 3-way valve. When the compound
pressure gauge reading reaches 0.1-0.2 MPa, retighten the valve stem
and disconnect the charge hose from the 3-way valve charging port.
(If the stem of the 3-way valve is opened fully before the charge hose
is disconnected, it may be difficult to disconnect the charge hose.)
10. Fully open the valve stems of the 2-way valve and 3-way valve using a hexa-
gon wrench. (After the valve stem begins to turn, turn it with a torque of less
than 2.9 N • m (30 kgf • cm) until it stops turning.)
11. Firmly tighten the 2-way valve and 3-way valve blank cap and the charg-
ing port cap.
CAUTION
(1)
Refrigerant must not be discharged into atmosphere.
(2)
After connecting the piping , check the joints for gas
leakage with gas leak detector.
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
Additional refrigerant
Table 5
15 m
None
20 m
100 g
Fig. 6
Table 4
Tightening torque
Blank cap
19.6 to 24.5 N
•
m (200 to 250 kgf
•
cm)
Charging port cap
12.3 to 15.7 N
•
m (125 to 160 kgf
•
cm)
CAUTION
(1)
When adding refrigerant, add the refrigerant from the
charging port at the completion of work.
(2)
The maximum length of the piping is 20 m. If the units
are further apart than this, correct operation can not
be guaranteed.
Between 15 m and 20 m, when using a connection pipe other than that
in the table, charge additional refrigerant with 20g/1 m as the criteria.
CAUTION
(1)
The power source capacity must be the sum of the air conditioner current and the current of other electrical appliances. When the
current contracted capacity is insufficient, change the contracted capacity.
(2)
When the voltage is low and the air conditioner is difficult to start, contact the power company the voltage raised.
Table 2
Flare nut size and tightening torque
Table 3
Pipe outside diameter
Flare nut
6.35 mm dia.
9.52 mm dia.
A (mm)
Pipe outside
diameter
ø 6.35 mm (1/4”)
ø 9.52 mm (3/8”)
Flare tool for
R410A, clutch type
0 to 0.5
0 to 0.5
Conventional (R22) flare tool
Clutch type
1.0 to 1.5
1.0 to 1.5
Wing nut type
1.5 to 2.0
1.5 to 2.0
CAUTION
(1) Fasten a flare nut with a torque wrench as instructed in this manual. If
fastened too tight, the flare nut may be broken after a long period of time
and cause a leakage of refrigerant.
(2) During installation, make sure that the refrigerant pipe is attached firmly
before you run the compressor. Do not operate the compressor under the
condition of refrigerant piping not attached properly with 2-way or 3-way
valve open. This may cause abnormal pressure in the refrigeration cycle
that leads to breakage and even injury.
Earth
screw
Connection Cord
Power supply Cord
OUTDOOR UNIT WIRING
ELECTRICAL REQUIREMENT
• Electric wire size and fuse capacity:
1
2
3
N
L
Power supply Cord
Diameter (mm)
✕
Torgue (N•m)
7
✕
14 ~ 18
22
✕
34 ~ 42
