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• After selecting the best location, start installation to Indoor/Outdoor Unit Installation Diagram.

1. Fix the unit on concrete or rigid frame firmly and horizontally by bolt nut (ø10 mm).
2. When installing at roof, please consider strong wind and earthquake. Please fasten the installation stand firmly with bolt or

nails.

Please make flare after inserting flare nut (locate at joint portion
of tube assembly) onto the copper pipe. 
(In case of using long piping)
Connect the piping

• Align the center of piping and sufficiently tighten the flare nut

with fingers.

• Further tighten the flare nut with torque wrench in specified

torque as stated in the table.

Decide piping length and then cut by using pipe cutter. Remove
burrs from cut edge. Make flare after inserting the flare nut
(located at valve) onto the copper pipe.
Align center of piping to valve and then tighten with torque
wrench to the specified torque as stated in the table.

Decide piping length and then cut by using pipe cutter. Remove burrs from cut edge. Make flare after inserting the flare nut (located
at valve) onto the copper pipe.
Align center of piping to valve and then tighten with torque wrench to the specified torque as stated in the table.

Model

A

B

C

D

E7***

570 mm

105 mm

18.5 mm

320 mm

E9***
E12***
E15***
E15***-3

613 mm

131 mm

16 mm

360.5 mm

E18***
E21***
E24***
E28***

Do not over tighten, over tightening cause gas leakage.

Piping Size

Torque

6.35 mm (1/4”)

[18 N

šm (1.8 kgf.m)] 

9.52 mm (3/8”)

[42 N

šm (4.3 kgf.m)] 

12.7 mm (1/2”)

[55 N

šm (5.6 kgf.m)] 

15.88 mm (5/8”)

[65 N

šm (6.6 kgf.m)] 

19.05 mm (3/4”)

[100 N

šm (10.2 kgf.m)] 

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WHEN INSTALLING AN AIR CONDITIONER, BE SURE TO EVACUATE THE AIR INSIDE THE INDOOR UNIT AND PIPES in the
following procedure.

1. Connect a charging hose with a push pin to the Low side of a charging set and the service port of the 3-way valve.

• Be sure to connect the end of the charging hose with the push pin to the service port.

2. Connect the center hose of the charging set to a vacuum pump.
3. Turn on the power switch of the vacuum pump and make sure that the needle in the gauge moves from 0 cmHg (0 MPa) to

-76 cmHg (-0.1 MPa). Then evacuate the air approximately ten minutes.

4. Close the Low side valve of the charging set and turn off the vacuum pump. Make sure that the needle in the gauge does not

move after approximately five minutes.
Note: BE SURE TO TAKE THIS PROCEDURE IN ORDER TO AVOID REFRIGERANT GAS LEAKAGE.

5. Disconnect the charging hose from the vacuum pump and from the service port of the 3-way valve.
6. Tighten the service port caps of the 3-way valve at a torque of 18 N

š

m with a torque wrench.

7. Remove the valve caps of both of the 2-way valve and 3-way valve. Position both of the valves to “OPEN” using a hexagonal

wrench (4 mm).

8. Mount valve caps onto the 2-way valve and the 3-way valve.

• Be sure to check for gas leakage.

1. Remove the control board cover from the unit by

loosening the screw.

2. Cable connection to the power supply through Isolating

Devices (Disconnecting means).

• Connect approved type polychloroprene sheathed

power supply cord 3 x 1.5 mm

2

 (3/4 ~ 1.75HP), 3 x

2.5 mm

2

 (2.0 ~ 2.5HP) or 3 x 4.0 mm

2

 (3.0HP) type

designation 245 IEC 57 or heavier cord to the terminal
board, and connect the others end of the cord to
Isolating Devices (Disconnecting means).

3. Connection cable between indoor unit and outdoor unit

shall be approved polychloroprene sheathed 4 x 1.5 mm

2

flexible cord, type designation 245 IEC 57 or heavier
cord.

4. Connect the power supply cord and connection cable

between indoor unit and outdoor unit according to the
diagram below.

• If gauge needle does not move from 0 cmHg (0 MPa) to -76 cmHg (-0.1 MPa), in step   above take the following measure: 
- If the leak stops when the piping connections are tightened further, continue working from step  .
- If the leak does not stop when the connections are retightened, repair the location of leak.
- Do not release refrigerant during piping work for installation and reinstallation. 
- Take care of the liquid refrigerant, it may cause frostbite. 

35

5. Secure the power supply cord and connection cable onto the control board with the holder.
6. Attach the control board cover back to the original position with screw.
7. For wire stripping and connection requirement, refer to instruction   of indoor unit.

• Note: Isolating Devices (Disconnecting means) should have minimum 3.0 mm contact gap.
• Earth wire shall be Yellow/Green (Y/G) in colour and longer than other AC wires for safety reason.

1. Please carry out insulation at pipe connection portion as mentioned in Indoor/Outdoor Unit Installation Diagram. Please wrap

the insulated piping end to prevent water from going inside the piping.

2. If drain hose or connecting piping is in the room (where dew may form), please increase the insulation by using POLY-E

FOAM with thickness 6 mm or above.

This equipment must be properly earthed.

36

Inverter control, which equipped with a microcomputer in determining the most suitable operating mode as time passes,
automatically adjusts output power for maximum comfort always. In order to achieve the suitable operating mode, the
microcomputer maintains the set temperature by measuring the temperature of the environment and performing temperature
shifting. The compressor at outdoor unit is operating following the frequency instructed by the microcomputer at indoor unit that
judging the condition according to internal setting temperature and intake air temperature.

Once the operation starts, remote control setting temperature will be taken as base value for temperature shifting processes.
These shifting processes are depending on the air conditioner settings and the operation environment. The final shifted value
will be used as internal setting temperature and it is updated continuously whenever the electrical power is supplied to the unit.

• Compressor is OFF when Intake Air Temperature - Internal Setting Temperature < -1.5

“C continue for 3 minutes.

• Compressor is ON after waiting for 3 minutes, if the Intake Air Temperature - Internal Setting Temperature > Compressor OFF

point.

• Compressor is OFF when Intake Air Temperature - Internal Setting Temperature < -2.0

“C continue for 3 minutes.

• Compressor is ON after waiting for 3 minutes, if the Intake Air Temperature - Internal Setting Temperature > Compressor OFF

point.

• Compressor is OFF when Intake Air Temperature - Internal Setting Temperature > +2.0

“C continue for 3 minutes.

• Compressor is ON after waiting for 3 minutes, if the Intake Air Temperature - Internal Setting Temperature < Compressor OFF

point.