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• There should not be any heat source or steam near the unit.
• There should not be any obstacles blocking the air

circulation.

• A place where air circulation in the room is good.
• A place where drainage can be easily done.
• A place where noise prevention is taken into consideration.
• Do not install the unit near the door way.
• Ensure the spaces indicated by arrows from the wall, ceiling,

fence or other obstacles.

• Recommended installation height for indoor unit shall be at

least 2.5 m.

• If an awning is built over the unit to prevent direct sunlight or

rain, be careful that heat radiation from the condenser is not
obstructed.

• There should not be any animal or plant which could be

affected by hot air discharged.

• Keep the spaces indicated by arrows from wall, ceiling,

fence or other obstacles.

• Do not place any obstacles which may cause a short circuit

of the discharged air.

• If piping length is over 7.5m, additional refrigerant should be

added as shown in the table.

Example: For A24GK
If the unit is installed at a 10m distance, the quantity of 
additional refrigerant should be 75g....(10 - 7.5)m x 30g/m =75g

Model

Piping size

Rate

Length 

(m)

Max. 

Elevation 

(m)

Min.

Piping 

Length (m

Max. Piping 

Length (m)

Additional 

Refrigeration 

(g/m)

Gas Liquid

C18GK, 

RS-C18GK

1/2”

1/4”

5

20

3

25

20

C24GK, 

RS-C24GK

5/8”

1/4”

5

20

3

25

30

A18GK

1/2”

1/4”

5

20

3

25

20

A24GK

5/8”

1/4”

5

20

3

25

30

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The mounting wall is strong and solid enough to prevent it from
the vibration.

The centre of installation plate should be at more than 550 mm
at right and left of the wall.
The distance from installation plate edge to ceiling should more
than 67 mm.
From installation plate left edge to unit’s left side is 47 mm.
From installation plate right edge to unit’s right is 73 mm.
B

: For left side piping, piping connection for liquid should

be about 126 mm from this line.

: For left side piping, piping connection about 174 mm 

from this line.

: For left side piping, piping connection about 984 mm 

from this line.

1. Mount the installation plate on the wall with 5 screws or

more.
(If mounting the unit on the concrete wall, consider using
anchor bolts.)

• Always mount the installation plate horizontally by

aligning the marking-off line with the thread and using a
level gauge

2. Drill the piping plate hole with ø70 mm hole-core drill.

• Line according to the arrows marked on the lower left

and right side of the installation plate. The meeting point
of the extended line is the centre of the hole. Another
method is by putting measuring tape at position as
shown in the diagram above. The hole centre is obtained
by measuring the distance namely 150 mm and 125 mm
for left and right hole respectively.

• Drill the piping hole at either the right or the left and the

hole should be slightly slanted to the outdoor side.

1. Insert the piping sleeve to the hole.
2. Fix the bushing to the sleeve.
3. Cut the sleeve until it extrudes about 15 mm from the

wall.

4. Finish by sealing the sleeve with putty or caulking

compound at the final stage.

1. For the right rear piping

2. For the right and right bottom piping

When the wall is hollow, please be sure to use the sleeve 
for tube ass’y to prevent dangers caused by mice biting 
the connecting cable.

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3. For the embedded piping

(This can be used for left rear piping and left bottom piping also.)

24

1. The inside and outside connecting cable can be

connected without removing the front grille.

2. Connecting cable between indoor unit and outdoor unit

shall be approved polychloroprene sheathed 3 

× 2.5 mm

2

(C18GK, C24GK, RS/RU-C18/24GK) or 5 

× 2.5 mm

2

(A18GK, A24GK) flexible cord, type designation 245 IEC
57 or heavier cord.

• Ensure the colour of wires of outdoor unit and the

terminal Nos. are the same to the indoor’s respectively.

• Earth lead wire shall be longer than the other lead wires

as shown in the figure for the electrical safety in case of
the slipping out of the cord from the anchorage.

• Secure the cable onto the control board with the holder

(clamper).