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25 

7  Remove the tapes and connect the power supply cord and connection cable between indoor unit and outdoor 

unit according to the diagram below. 

 

 

 

8  Secure the power supply cord and connection cable onto the control board with the holder. 
9  Close grille door by tighten with screw and close the front panel. 

 

Note: 

  Isolating Devices (Disconnecting means) should have minimum 3.0 mm contact gap. 

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

  Earth wire shall be Yellow/Green (Y/G) in colour and longer than other AC wires as shown in the figure for the 

electrical safety in case of the slipping out of the cord from the anchorage. 

 

 

 
 
 
 
 
 
 
 

3

2

1

t

i

n

u

 

r

o

o

d

t

u

o

 

e

h

t

 

n

o

 

s

l

a

n

i

m

r

e

T

Colour of wires (connection cable)

Terminals on the indoor unit

L

N

1

2

3

(Power supply cord)

Terminals on the isolating devices 
(Disconnecting means)

(L) (N)

Recommended 
length (mm)

a b

c

d e

f

g

55 35 35 50 40 35 60

 WARNING

 This equipment must 

be properly earthed.

Recommended 

length (mm)

Tape

Connection cable

Tape

Power supply cord

Terminal Board

Control 

Board

Earth wire 
longer than 
others 
AC wires 
for safety 
reason

Holder

Holder

Indoor & outdoor 
connection cable 

Isolating Devices

Outdoor unit

Power supply 

cord

OR

OR

OR

  Do not joint wires

  Use complete wire without joining.

  Use approved socket and plug with earth pin.

   Wire connection in this area must follow to national wiring rules.

Conductor 

over inserted

Wire stripping

No loose strand 
when inserted

10 ± 1 mm

Conductor 

fully inserted

PROHIBITED

Conductor not 

fully inserted

PROHIBITED

ACCEPT

Indoor/outdoor 
connection 
terminal board

5 mm or more 

(gap between wires)

RISK OF FIRE
JOINING OF WIRES 
MAY CAUSE 
OVERHEATING AND 
FIRE.

26 

  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, screws or nails. 

 

 

Model A 

B 

C 

D 

BE20*** 
KE25***, BE25***, DE25***
KE35***, BE35***, DE35***

570 mm  105 mm  18.5 mm 320 mm

KE50***, BE50***, DE50*** 540 mm  160 mm  18.5 mm 330 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 

  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. 

 
 

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)] 

 

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. 
 

 

 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

A

B

C

D

Torque 
wrench

Spanner or 
Wrench

27 

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. 

 

 

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. 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

OPEN

CLOSE

Gas side

Liquid side

Outdoor unit

Two-way valve

Three-way valve

Indoor unit

Vacuum 
pump

Close

Close

28 

1  Remove the control board cover from the unit 

by loosening the screw. 

2  Connection cable between indoor unit and 

outdoor unit shall be approved 
polychloroprene sheathed 4 x 1.5 mm

2

  

(3/4 ~ 1.5HP) or 4 x 2.5 mm

2

 (2.0HP) flexible 

cord, type designation 60245 IEC 57 or 
heavier cord. Do not use joint connection 
cable. Replace the wire if the existing wire 
(from concealed wiring, or otherwise) is too 
short. Allowable connection cable length of 
each indoor unit shall be 30 mm or less. 

 

 

 

3  Secure the cable onto the control board with 

the holder. 

4  Attach the control board cover back to the 

original position with screw. 

5  For wire stripping and connection requirement, 

refer to instruction 11.2.4.1 of indoor unit. 

 

 

 

 

 This equipment must be properly earthed. 

 

  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. 

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. 

 

 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

Terminals on the outdoor unit

1

2

3

Colour of wires

Terminals on the indoor unit

1

2

3

Earth Wire 
longer than 
others AC 
wires for 
safety reason

Terminal 
Board

Holder

Indoor and outdoor 

cable connection

Indoor Unit

When properly fl ared, the internal surface of the 
fl are will evenly shine and be of even thickness. 
Since the fl are part comes into contact with the 
connections, carefully check the fl are fi nish.

 Improper  fl aring 

Inclined Surface 

damaged

Cracked Uneven 

thickness

1.  To cut

2.  To remove burrs

3.  To fl are

Bar

Red arrow mark

Handle

Core

Yoke

Clamp handle

Bar

0 – 0.5 mm

Copper pipe

Reamer

Point down

Pipe