26 
Model 
Indoor CS-RZ20WKEW  CS-RZ25WKEW 
Outdoor CU-RZ20WKE  CU-RZ25WKE 
Piping 
Pipe Diameter (Liquid / Gas)  mm (inch)  6.35 (1/4) / 9.52 (3/8)  6.35 (1/4) / 9.52 (3/8) 
Standard length  m (ft)  5.0 (16.4)  5.0 (16.4) 
Length range (min – max)  m (ft)  3 (9.8) ~ 15 (49.2)  3 (9.8) ~ 15 (49.2) 
I/D & O/D Height different  m (ft)  15.0 (49.2)  15.0 (49.2) 
Additional Gas Amount  g/m (oz/ft)  10 (0.1)  10 (0.1) 
Length for Additional Gas  m (ft)  7.5 (24.6)  7.5 (24.6) 
Drain Hose 
Inner Diameter  mm   16  16 
Length mm  550  550 
Indoor Heat 
Exchanger 
Fin Material    Aluminium (Pre Coat)  Aluminium (Pre Coat) 
Fin Type    Slit Fin  Slit Fin 
Row × Stage × FPI    2 × 14 × 17  2 × 15 × 21 
Size (W × H × L)  mm  580 × 294 × 25.4  580 × 315 × 25.4 
Outdoor 
Heat 
Exchanger 
Fin Material    Aluminium (Pre Coat)  Aluminium (Pre Coat) 
Fin Type    Corrugated Fin  Corrugated Fin 
Row × Stage × FPI    1 × 24 × 17  1 × 24:12 × 17 
Size (W × H × L)  mm  18.2 × 504 × 710  36.4 × 504:252 × 713:684 
Air Filter 
Material   Polypropelene  Polypropelene 
Type   One-touch  One-touch 
Power Supply    Indoor  Indoor 
Power Supply Cord  A  Nil  Nil 
Thermostat    Electronic Contol  Electronic Contol 
Protection Device    Electronic Contol  Electronic Contol 
  Dry Bulb  Wet Bulb  Dry Bulb  Wet Bulb 
Indoor 
Operation 
Range 
Cooling 
Maximum °C 32 23 32 23 
Minimum °C 16 11 16 11 
Heating 
Maximum °C 30 – 30 – 
Minimum °C 16 – 16 – 
Outdoor 
Operation 
Range 
Cooling 
Maximum °C 43 26 43 26 
Minimum °C -10 – -10 – 
Heating 
Maximum °C 24 18 24 18 
Minimum °C -15 -16 -15 -16 
 
1.  Cooling capacities are based on indoor temperature of 27°C Dry Bulb (80.6°F Dry Bulb), 19.0°C Wet Bulb (66.2°F Wet Bulb) and outdoor air 
temperature of 35°C DRY BULB (95°F Dry Bulb), 24°C Wet Bulb (75.2°F Wet Bulb) 
2.  Heating capacities are based on indoor temperature of 20°C Dry Bulb (68°F Dry Bulb) and outdoor air temperature of 7°C Dry Bulb (44.6°F 
Dry Bulb), 6°C Wet Bulb (42.8°F Wet Bulb) 
3.  Heating low temperature capacity, Input Power and COP measured at 230 V, indoor temperature 20°C, outdoor 2/1°C 
4.  Heating extreme low temperature capacity, Input Power and COP measured at 230 V, indoor temperature 20°C, outdoor -7/-8°C 
5.  Standby power consumption 2.0W (when switched OFF by remote control, except under self protection control). 
6.  Specifications are subjected to change without prior notice for further improvement.