Type Ceiling Concealed Duct -Middle Static  
Model Unit   ARNU283M2A4 ARNU363M2A4 ARNU423M2A4 
Cooling Capacity  
kW  
kcal/h  
Btu/h  
Heating Capacity  
kW  
kcal/h  
Btu/h  
Power Input
Nominal W
Rated W
Casing  
Dimensions
(WxHxD)
Body  
mm  
inch  
Coil  
Rows x Columns x FPI  
Face Area   m
2 
(ft
2
) 
Fan  
Type  
Motor Output x Number   W  
Running Current   A 
Air Flow Rate(H / M / L)
(High Mode-Factory Set)
External static pressure  
CMM  
CFM  
mmAq(Pa)
Air Flow Rate(H / M / L)
(Standard mode)
External static Pressure
CMM  
CFM  
mmAq(Pa)
Drive  
Motor type  
Temperature Control  
Sound Absorbing Thermal Insulation Material  
Air Filter 
Safety Device  
Pipe Connections  
Liquid Side   mm(inch)  
Gas Side   mm(inch)  
Drain Pipe(Internal Dia.)   mm(inch)  
Net Weight   Body   kg(lbs)  
Sound Pressure Levels (H / M / L) dB(A)
Sound Power Levels (H / M / L) dB(A)
Power Supply   Ø, V, Hz  
Refrigerant Control   
Transmission Cable (AWG# -C)
- 4 -
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All rights reserved. Only training and service purposes.
8.2
7 100
28 000
9.2
8 000
31 500
123
430
Galvanized Steel Plate
1 250 × 270 × 700
49-7/32 x 10-5/8 x 27-9/16
3 x 13 x 18
0.27(2.91)
Sirocco Fan
350 x 1
2.3
28.0 / 24.0 / 21.0
989 /848 / 742
6(59)
28.0 / 24.0 / 21.0
989 /848 / 742
5(49)
Direct
BLDC
Microprocessor, Thermostat
for cooling and heating  
Foamed polystrene 
-
Fuse
Ø9.52(3/8)
Ø15.88(5/8)
25(1)
39.1(86)
40 / 39 / 37
64 / 61 / 57
1, 208-230, 60
EEV
AWG 18 x 2C
10.6
9 100
36 200
11.9
10 200
40 600
184
430
Galvanized Steel Plate
1 250 × 270 × 700
49-7/32 x 10-5/8 x 27-9/16
3 x 13 x 18
0.27(2.91)
Sirocco Fan
350 x 1
2.3
28.0 / 24.0 / 21.0
989 / 848 / 742
6(59)
28.0 / 24.0 / 21.0
989 / 848 / 742
5(49)
Direct
BLDC
Microprocessor, Thermostat
for cooling and heating  
Foamed polystrene 
-
Fuse
Ø9.52(3/8)
Ø15.88(5/8)
25(1)
39.1(86)
42 / 40 / 38
65 / 62 / 60
1, 208-230, 60
EEV
AWG 18 x 2C
12.3
10 600
42 000
13.8
11 800
47 000
231
430
Galvanized Steel Plate
1 250 × 270 × 700
49-7/32 x 10-5/8 x 27-9/16
3 x 13 x 18
0.27(2.91)
Sirocco Fan
350 x 1
2.3
38.0 / 33.0 / 28.0
1 342 / 1 165 / 989
6(59)
38.0 / 33.0 / 28.0
1 342 / 1 165 / 989
5(49)
Direct
BLDC
Microprocessor, Thermostat
for cooling and heating  
Foamed polystrene 
-
Fuse
Ø9.52(3/8)
Ø15.88(5/8)
25(1)
39.1(86)
44 / 43 / 40
66 / 65 / 63
1, 208-230, 60
EEV
A
WG 18 x 2C
Notes:-
1. Capacities are based on the following conditions:
     Cooling    • Indoor temp. 27°C[80.6°F]DB/ 19°C[66.2°F]WB
                     • Outdoor temp. 35°C[95°F]DB/ 24°C[75.2°F]WB
                     • Interconnecting Piping Length 7.5m(24.6ft)
                     • Level Difference of Zero
     Heating    • Indoor temp. 20°C[68°F]DB/ 15°C[59°F]WB
                     • Outdoor temp. 7°C[44.6°F]DB/ 6°C[42.8°F]WB
                     • Interconnecting Piping Length 7.5m(24.6ft)
                     • Level Difference of Zero
2. Capacities are net capacities
3. Due to our policy of innovation some specifications may be changed without prior notification
4. To be added for more available Models
5. EEV : Electronic Expansion Valve
6. Noise Level is Standard Mode
(for actual High Mode(factory set) condition, Noise Level may exceed the standard level by 1.5dBA)
Conversion Formula
kcal/h= kW x 860
Btu/h = kW x 3412
CFM = m
3
/min x 35.3
l/s = CMM x 1 000/60