59 
12. Installation Instruction 
CS-TZ20ZKEW  CS-TZ25ZKEW  CS-TZ35ZKEW  CS-TZ42ZKEW  CS-TZ50ZKEW  CS-RZ25ZKEW   
CS-RZ35ZKEW  CS-RZ50ZKEW 
12.1  Select the Best Location 
12.1.1 Indoor Unit  
  Do not install the unit in excessive oil fume area 
such as kitchen, workshop and etc. 
  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. 
  Indoor unit of this air conditioner shall be installed 
in a height of at least 1.8 m. 
 
 
 
 
 
 
 
 
 
12.1.2  Indoor Unit Installation Diagram 
 
 
 
  This illustration is for explanation purposes only. The indoor unit will actually face a different way. 
 
(*) If holder at the rear of chassis (Refer column “12.2.3 Indoor Unit Installation” ) need to be used to prop up the unit, 
this distance shall be 65 mm or more. 
 
Table A 
Model  Capacity W (HP)  Max. Refrigerant Charge (kg)  Indoor A
min
 (m
2
) 
TZ20***  3/4HP  0.60  Not applicable (*) 
TZ25***, RZ25***  1.0HP  0.69  Not applicable (*) 
TZ35***, RZ35***  1.5HP  0.75  Not applicable (*) 
TZ42***  1.75HP  0.87  Not applicable (*) 
TZ50***, RZ50***  2.0HP  1.22  Not applicable (*) 
 
(*) Systems with total refrigerant charge, m
c
, lower than 1.84kg are not subjected to any room area requirements. 
* Table “A” only applicable for single split connection. 
* In case of connection to outdoor multi inverter, refer to installation manual at outdoor unit. 
 
A
min
 = (m
c
 / (2.5 × (LFL)
(5/4)
 × h
0
)) 
2
 
** not less than safety factor margin 
A
min
 
= Required minimum room area, in m
2
 
 
m
c
 
= Refrigerant charge in appliance, in kg   
LFL 
= Lower flammability limit (0.307 kg/m
)   
h
0
  = Installation height of the appliance (1.8 m for wall mounted) 
SF 
= Safety factor with a value of 0.75 
 
** The required minimum room area, A
min
, shall also be governed by the safety factor margin formula below : 
 
A
min
 = m
c
 / (SF × LFL × h
0
)   
The higher value shall be taken when determining the room area. 
 
 
 
 
Piping direction Attention not to bend 
up drain hose
(Front side)
Right
Right 
Rear
Right 
bottom
Left 
Rear
Left bottom
Left
65 mm 
or more
(Left and right are identical)
Installation plate  1
Sleeve ( 
 )
Bushing-Sleeve ( 
 )
Bend the pipe as closely 
on the wall as possible, 
but be careful that it 
doesn’t break.
Saddle ( 
 )
Putty ( 
 )
(Gum Type Sealer)
Installation parts you 
should purchase ( 
 )
50 mm 
or more
Vinyl tape (wide) (   )
 • Apply after carrying 
out a drainage test.
 • To carry out the 
drainage test, remove 
the air fi lters and pour 
water into the heat 
exchanger.
 •
Carry out insulation after 
checking for gas leaks and 
secure with vinyl tape.
 Vinyl tape
Remote control holder 5
Remote control holder fi xing screws 6
Remote 
control 3
Insulation of piping connections
Attaching the remote control holder to the wall
Power supply cord (   )
It is advisable to avoid more 
than 2 blockage directions. 
For better ventilation & 
multiple-outdoor installation, 
please consult authorized 
dealer/specialist.
50 mm 
or more
(
*
)