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25 

 
 

 

x  After selecting the best location, start installation according to indoor/outdoor unit installation diagram. 

1 

Fix the unit on concrete or rigid frame firmly and horizontally by bolt nut (ø10mm). 

2 

When installing at roof, please consider strong wind and earthquake. 
Please fasten the installation stand firmly with bolt or nails. 

 

A

B

C

D

 

Model A 

B 

C 

D 

C7JKD, C9JKD, 

C12JKD 

474 mm 

87 mm  18.5 mm 261 mm

C18JKD 

570 mm 

105 mm  18.5 mm 320 mm

C24JKD 

612.5 mm  131 mm  19 mm  383 mm

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 
x  Align the center of piping and sufficiently tighten 

the flare nut with fingers. 

x  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 (locate at valve) 
onto the copper pipe. 
Align center of piping to valves and then tighten with 
torque wrench to the specified torque as stated in the 
table. 
 
 
 
 
 

 
 

 
 

Torque
wrench

Spanner
or Wrench

 

 
 
 
 
 
 
 
 
 

Piping size 

Torque 

1/4” (6.35 mm) 

[18 N•m (1.8 kgf.m)] 

3/8” (9.52 mm) 

[42 N•m (4.3 kgf.m)] 

1/2” (12.7 mm) 

[55 N•m (5.6 kgf.m)] 

5/8” (15.88 mm) 

[65 N•m (6.6 kgf.m)] 

3/4” (19.05 mm) 

[100 N•m (10.2 kgf.m)] 

 

 

Do not over tighten, over tightening cause gas leakage 

26 

 

 

 

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. 

o  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 REFRIGERENT GAS LEAKAGE. 

5 

Disconnect the charging hose from the vacuum pump and 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•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. 

o  Be sure to check for gas leakage. 
 

 

 

 
x 

If gauge needle does not move from 0 cmHg (0 MPa) to -76 cmHg (-01 MPa), in the step 

e above take the following measure: 

o 

If the leak stops when the piping connections are tightened further, continue working from step 

e. 

o 

If the leak does not stop when the connections are retightened, repair location of leak. 

o 

Do not release refrigerant during piping work for installation and reinstallation. 

o 

Take care of the liquid refrigerant, it may cause frostbite. 
 

1 

Remove the control board cover from the unit 
by loosening the screw. 

2 

Connecting cable between indoor unit and 
outdoor unit shall be approved 
polychloroprene sheathed 3 x 1.5mm

2

 (3/4 ~ 

1.5HP) or 3 x 2.5mm

2

 (2.0 ~ 2.5HP) flexible 

cord, type designation 245 IEC 57 or heavier 
cord. 
 

 

 

3 

Secure the cable onto the control board with 
the holder (clamper).   

4 

Attach the control board cover back to the 
original position with the screw. 

5  For wire stripping and connection requirement, 

refer to instruction 

g of the indoor unit. 

 

 

 This equipment must be properly earthed. 

 
x  Earth wire shall be Yellow/Green (Y/G) in colour     

and longer than other AC wires for safety reason.

27 

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 6mm or above. 

1 

Please cut using pipe cutter and then remove the burrs. 

2 

Remove the burrs by using reamer. If burrs are not removed, gas leakage may be caused. Turn the piping 
end down to avoid the metal powder entering the pipe. 

3 

Please make flare after inserting the flare nut onto the copper pipes. 

 

 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

28 

x  Cooling operation can be set using remote control. 

x  This operation is applied to cool down the room temperature to the setting temperature sets by the remote control. 

x  The remote control setting temperature, which takes the reading of intake air temperature sensor, can be 

adjusted from 16°C to 30°C. 

x  During cooling operation, the compressor will stop and restart as shown in figure below: 
 
 
 
 
 
 
 
 
 
 
 

a b c d e f  g h i  j  k l  m n o p q r  s t  u v w x y  z 

 

Compressor-ON 

level                          

Intake Air  

 Temperature 

1.5°C 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 Compressor-OFF 

level 

(Setting Temperature) 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10°C 

 

  

 

 

 

 

 

 

 

 

 

Indoor 

Heat 

Exchanger 

Temperature 

2°C 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3’ 

 Time Frame 

1’    

3‘ 

1’

7’ 

1’

 

4’ 

30”  

 

 

 

 

 

 Compressor 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 Indoor Fan 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 Outdoor Fan 

 

 

   

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 Operation LED 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

<Description 

of 

operation> 

                         

 a – b, g – h 

: Minimum 60 seconds forced operation 

 

 Operation 

 d – g, s – u 

: Minimum 3 minutes restart control (Time Delay Safety Control) 

 

 

 

 

 

 

 h – o 

: Maximum 7 minutes time save control 

 

 

Stop 

 q – u 

: Freeze Prevention Control 

 

 

 

 

 

 

 

Intake air 
temperature 

Compressor ON 

Compressor OFF 

1.5

ƱC 

Remote Control 
setting temperature