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33 

 

•

How to pull the piping and drain hose out, in case of the 
embedded piping.

 

•

In case of left piping how to insert the 
connection cable and drain hose.

Rear view for left piping installation

Adjust the piping slightly 
downwards.

Drain hose

Connection cable

Exchange the drain hose and 
the cap

(For the right piping, follow the same procedure)

Drain cap

Drain hose

 

PVC tube for 
drain hose

Indoor unit

55mm (1/2 ~ 1.75Hp) or 

80mm (2.0 ~ 2.5Hp)

Piping

Cable

Apply putty or 
caulking material 
to seal the wall 
opening.

Connection cable

Piping

More than 

470 mm

More than 950mm 

(1/2 ~ 1.75Hp) or 

1150mm (2.0 ~ 2.5Hp)

PVC tube (VP-65) for piping and 
connection cable

PVC tube for drain hose (VP-30)

PVC tube for 
drain hose (VP-20)

More than 700 mm

Drain hose 
from main unit

Cable

45°

Drain hose

Piping

Sleeve for piping hole

Drain hose

Piping

Connection cable

More than 950mm 
(1/2 ~ 1.75Hp) or 
1150mm (2.0 ~ 2.5Hp)

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. 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 m or less. 

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. 

 

 

Terminals on the outdoor unit

L

N

1

2

3

Colour of wires

Terminals on the indoor unit

1

2

3

 

 
 
 
 
 
 
 
 
 
 

34 

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

o 

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

o 

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

 

Connection cable

Indoor & outdoor 

connection cable

Escapement

Terminal Board

Recommended 

length (mm)

Earth Wire 
longer than 
others AC 
wires for 
safety reason

Holder

Indoor & outdoor 
connection cable

Outdoor unit

Tape

Recommended 
length (mm)

a

b

c

d

35

35

35 55

 

 

 This equipment must be properly earthed. 

 

 

WARNING

OR

   Use complete wire 

without joining.

   Use approved socket 

and plug with earth pin.

   Wire connection in this 

area must follow to 
national wiring rules.

Wire stripping

No loose strand 
when inserted

10 ± 1 mm

JOINING OF WIRES 
MAY CAUSE 
OVERHEATING AND 
FIRE.

5 mm or more 

(gap between wires)

Indoor/outdoor 
connection 
terminal board

 Do not joint wires

OR

OR

Conductor 

fully inserted

Conductor over 

inserted

Conductor not 

fully inserted

ACCEPT

PROHIBITED

PROHIBITED

 

 
 
 
 
 
 
 
 
 
 
 

35 

  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. 

 

A

B

C

D

 

Model A 

B 

C 

D 

TZ20***, TZ25***, TZ35***  570 mm  105 mm 18.5 mm 320 mm
TZ42***, TZ50*** 

540 mm  160 mm 18.5 mm 330 mm

For connection joint location at outside building of all 
model (except R32 model) 
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. 

 

Torque 
wrench

Spanner or 
Wrench

 

For connection joint location at inside building for R32 
model only 

  Decide the length. 

  Cut and remove the tube connectors at indoor 

copper pipings (both gas and liquid piping) by 
using pipe cutter. Remove burrs from cut edge. 

  Use pipe expander to expand the end of long 

piping. 

  Align the center of piping and braze the piping 

joints. 

 

Indoor 
copper pipe

Tube connector

(40~50mm)

Brazing point

1. Cut and 

Remove

2. Expand long 

pipe

3. Braze both 

pipe

 

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. 
 
 
 
 

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)] 

 

 
 
 
 
 
 

36 

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. 
 
* For Gas side piping please refer table and diagram below 

Connection pipe

(female side)

Auxiliary pipe

(male side)

Flare Nut

Hall Union

Liquid side

 

 
 

Outdoor Multi Combination Model 

Pipe size (refer 

to diagram)

R32 Model

R410A Model

CS-MTZ16***,
CS-TZ20***,
CS-TE20***,
CS-TZ25***,
CS-TE25***,
CS-TZ35***,
CS-TE35***

CU-2Z35***,
CU-2Z41***,
CU-2Z50***,
CU-3Z52***,
CU-3Z68***,
CU-4Z68***,
CU-4Z80***,
CU-5Z90***,
CU-2TZ41***,
CU-2TZ50***,
CU-3TZ52***

CU-2E12***,
CU-2E15***,
CU-2E18***,
CU-3E18***,
CU-3E23***,
CU-4E23***,
CU-4E27***,
CU-5E34***,
CU-2RE15***,
CU-2RE18***,
CU-3RE18***

CS-TZ42***,
CS-TE42***,
CS-TZ50***,
CS-TE50***

CU-2Z50***,
CU-3Z52***,
CU-3Z68***,
CU-4Z68***,
CU-4Z80***,
CU-5Z90***,
CU-2TZ50***,
CU-3TZ52***

CU-2E18***,
CU-3E18***,
CU-3E23***,
CU-4E23***,
CU-4E27***,
CU-5E34***,
CU-2RE18***,
CU-3RE18***

(CZ-MA1P)

CS-TZ60***,
CS-TE60***

CU-4Z68***,
CU-4Z80***,
CU-5Z90***

CU-4E23***,
CU-4E27***,
CU-5E34***

(CZ-MA2P)

CS-TZ71***

CU-4Z80***,
CU-5Z90***

CU-4E27***,
CU-5E34***

(CZ-MA2P) & 

(CZ-MA3P)

Hall Union

Connection pipe 

(female side)

Auxiliary pipe

 (male side)

Flare Nut

Hall Union

Packing

Connection pipe 

(female side)

Auxiliary pipe

 (male side)

Pipe size reducer (CZ-MA1P)

Flare Nut

Auxiliary pipe

 (male side)

 (Outdoor)

Auxiliary pipe

 (male side)

 (Indoor)

Hall Union

Hall Union

Packing

Connection pipe 

(female side)

Pipe size expander 

(CZ-MA2P)

Flare Nut

Auxiliary pipe

 (male side)

 (Outdoor)

Auxiliary pipe

 (male side)

 (Indoor)

Hall Union

Hall Union

Packing

Packing

Connection pipe 

(female side)

Pipe size expander 

(CZ-MA2P)

Flare Nut

Pipe size reducer 

(CZ-MA3P)

Gas side