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53 

 

1  The inside and outside connection cable can 

be connected without removing the front grille. 

2  Connection cable between indoor unit and 

outdoor unit shall be approved 
polychloroprene sheathed 4 x 1.5 mm

2

 flexible 

cord, type designation 60245 IEC 57 or 
heavier cord. 

3  Bind all the indoor and outdoor connection 

cable with tape and route the connection 
cable via the escapement. 

4  Remove the tapes and connect the 

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

 

 

 

 

 
Note: 

š  Secure the connection cable onto the control board with the holder. 

š  Ensure the colour of wires of outdoor unit and the terminal Nos. are the same to the indoor’s respectively. 

š  Earth wire shall be Yellow/Green (Y/G) in colour and longer than other AC wires for safety reason. 

54 

 

 

 

 

1  Please cut using pipe cutter and then remove the burrs. 
2  Remove the burrs by using reamer. If burrs is 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. 

 

 

 

55 

š  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. 

 

 

 

 

Model A 

B 

C 

D 

E7*** 

570 mm  105 mm  18.5 mm 320 mm 

E9*** 

E12*** 

E15*** 

E18*** 

613 mm  131 mm  16 mm  360.5 mm

E24*** 

E28*** 

Connecting the Piping to Indoor 
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 

š  Align the center of piping and sufficiently tighten the 

flare nut with fingers. 

š  Further tighten the flare nut with torque wrench in 

specified torque as stated in the table. 

Do not overtighten, overtightening may cause gas leakage. 

 
 

Piping size 

Torque 

6.35 mm (1/4”) 

[18 N•m (1.8 kgf.m)] 

9.52 mm (3/8”) 

[42 N•m (4.3 kgf.m)] 

12.7 mm (1/2”) 

[55 N•m (5.6 kgf.m)] 

15.88 mm (5/8”) 

[65 N•m (6.6 kgf.m)] 

19.05 mm (3/4”) 

[100 N•m (10.2 kgf.m)] 

 

 
Connecting the Piping to Outdoor 
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 valve and then tighten with torque 
wrench to the specified torque as stated in the table. 

 

 
Connecting The Piping to Outdoor Multi 
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 valve and then tighten with torque wrench to 
the specified torque as stated in the table. 
 

 

 

 

56 

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. 

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 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•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. 

 

 

š  If gauge needle does not move from 0 cmHg (0 MPa) to –76 cmHg (–0.1 MPa), in step 3 above take the following measure: 
-  If the leak stops when the piping connections are tightened further, continue working from step 3. 
-  If the leak does not stop when the connections are retightened, repair location of leak. 
-  Do not release refrigerant during piping work for installation and reinstallation. 
-  Take care of the liquid refrigerant, it may cause frostbite.