Hitachi RAK-18PSC User manual

TECHNICAL CATALOGUE
MONO SPLIT
RAK-25PSC
RAK-35PSC
RAK-
RA
RA
RA C
18PSC
C-18WS
C-25WSC
C-35WSC

HITACHI
Specifications in this catalogue are subject to change without prior notice in order for HITACHI
to bring in the latest innovations to their customers
Whilst every effort is made to ensure that all dimensions and specifications are correct, any
printers’ error not rectified are outside the control of HITACHI, who cannot be held responsible
for the same

CONTENTS
1
CONTENTS
CONTENTS _______________________________________________________________________ 1
1SPECIFICATIONS__________________________________________________________1-1
1.1. WALL TYPE (RAK-18PSC/25PSC/35PSC) _______________________________________1-1
1.2. WALL TYPE (RAC-18WSC/25WSC/35WSC) _____________________________________1-2
2DIMENSIONAL DATA_______________________________________________________2-1
2.1. WALL TYPE: RAK-18PSC/25PSC/35PSC________________________________________2-1
2.2. WALL TYPE: RAC-18WSC/25WSC/35WSC ______________________________________2-2
3CAPACITIES TABLE _______________________________________________________3-1
3.1. CAPACITY CHARACTERISTIC CURVES________________________________________3-1
3.1.1. RAK-18PSC/RAC-18WS ____________________________________________________3-1C
3.1.2. RAK-25PSC/RAC-25WS ____________________________________________________3-1C
3.1.3. RAK-35PSC/RAC-35WS ____________________________________________________3-2C
3.2. CORRECTION FACTORS ACCORDING TO PIPING LENGTH _______________________3-3
3.3. CORRECTION FACTORS ACCORDING TO DEFROSTING OPERATION ______________3-4
4SOUND DATA_____________________________________________________________4-1
4.1. RAC-18WS ______________________________________________________________4-1C
4.2. RAC-25WS ______________________________________________________________4-2C
4.3. RAC-35WS ______________________________________________________________4-3C
5WORKING RANGE _________________________________________________________5-1
5.1. POWER SUPPLY __________________________________________________________5-1
5.2. WORKING RANGE _________________________________________________________5-1
6ELECTRICAL DATA ________________________________________________________6-1
6.1. INDOOR UNIT_____________________________________________________________6-1
6.2. OUTDOOR UNIT___________________________________________________________6-1
7WIRING DIAGRAM _________________________________________________________7-1
7.1. RAK-18PSC, RAK-25PSC, RAK-35PSC _________________________________________7-1
7.2. RAC-18WSC, RAC-25WSC, RAC-35WS _______________________________________7-2C
8REFRIGERANT CYCLE _____________________________________________________8-1
8.1. WALL TYPE: RAK-18PSC/25PSC/35PSC / RAC-18WSC/25WSC/35WS _______________8-1C
9CONTROL AND FUNCTION__________________________________________________9-1
9.1. WIRELESS REMOTE CONTROL FUNCTION ____________________________________9-1
9.2. AUTO CHANGEOVER ______________________________________________________9-2
9.3. SHIFT VALUE _____________________________________________________________9-2
9.4. OPERATION LOCK_________________________________________________________9-3
9.5. SETTING THE PREVENTION OF MUTUAL INTERFERENCE________________________9-3
9.6. ERROR CODE INFORMATION________________________________________________9-4
9.7. ADDITIONAL FUNCTION VIA DIP-SWITCH SETTINGS ____________________________9-6
9.7.1. AUTO RESTART FUNCTION _________________________________________________9-6
9.7.2. HEATING/COOLING ONLY MODEL SELECTION _________________________________9-6
10 OPTION LIST ____________________________________________________________10-1
10.1 WIRED REMOTE CONTROL ________________________________________________10-1
10.1.1 SHIFT VALUE ____________________________________________________________10-1
10.1.2 ERROR CODE INFORMATION_______________________________________________10-2
10.2 H-LINK ADAPTOR_________________________________________________________10-5
10.2.1 SAFETY SUMMARY _______________________________________________________10-5
10.2.2 INSTALLATION WORK _____________________________________________________10-5
10.2.3 ELECTRICAL WIRING _____________________________________________________10-6
10.2.4 DIP SWITCH SETTING _____________________________________________________10-7
10.2.5 TEST RUN_______________________________________________________________10-8
10.3 DRY CONTACT APPLICATION (USING DIP SWITCH) ____________________________10-9

SPECIFICATIONS
1-1
1 SPECIFICATIONS
1.1. WALL TYPE (RAK-18PS PS PSC/25 C/35 C)
INDOOR UNIT RAK-18PSC RAK-25PSC RAK-35PSC
Nominal capacity adjustable no no no
Nominal Cooling capacity (min - max) kW
1.8 ( 0.5 - 2.8 )
2.5 ( 0.5 - 3.4 )
3.5 (0.5 - 4.1 )
Cooling sensible capacity kW 1.8 2.2 2.7
Nominal Heating capacity (min - max) kW
2.3(0.6 -4.8)
3.2(0.6 -5.8)
4.0(0.6 - 6.6)
Noise level cooling (sound pressure)
(SL / L / M / H)
dB(A) 22/28/34/40 22/28/34/42 23/28/34/44
Noise level heating (sound pressure)
(SL / L / M / H)
dB(A) 22/30/34/41 22/30/34/42 23/30/34/44
Noise level (sound power) dB(A) 54 56 58
Air flow cooling mode (SL / L / M / H) m3260/300/420/ 470/h 260/320/420/510 270/320/420/520
Air flow heating mode (SL / L / M / H) m3260/300/420/540/h 260/370/520/600 270/410/520/610
Fan Motor W 30 30 30
Dehumidification l/h 1.2 1.4 1.6
Dimensions (H x W x D) mm 295x798x258 295x798x258 295x798x258
Weight kg 12 12 12
Colour White (N9.5) White (N9.5) White (N9.5)
Condensate Drain mm φ16mm φ16mm φ16mm
Running current (C/H) A 0.30-3.83/0.28-7.04 0.30-4.17/0.28-9.78 0.30-5.87/0.28-10.65
Power supply 220-230V 220-230V 220-230V
Cable section (Interconnection) mm² 1.50x 3+EARTH/- 1.50x 3+EARTH/- 1.50x 3+EARTH/-
Piping diameter (Liq / Gas) Inch 1/4" / 1/2" 1/4" / 1/2" 1/4" / 1/2"
Drain diameter (ext) mm φ16 φ16 φ16
Remote control (standard/optional) * RAR-5W2/SPX-RCDB RAR-5W2/SPX-RCDB RAR-5W2/SPX-RCDB
Filter
Pre-filter (Standard/Optional) Micro Mesh Stainless/- Micro Mesh Stainless/- Micro Mesh Stainless/-
NOTE:
1. The nominal cooling and heating capacity is the
combined capacity of the HITACHI standard split
system, and are based on the ISO 5151.
2. The Sound Pressure Level is based on the following
conditions:
-0.8 meter beneath indoor height center
-1 meter from Discharge grille
The above data was measured in an anechoic
chamber. Please take into consideration reflected
sound of your specific site
Operation Conditions
Cooling
Heating
Indoor Air Inlet Temperature
dB
27.0 °C 20.0 °C
WB
19.0 °C
Outdoor Air Inlet
Temperature
dB
35.0 °C 7.0 °C
WB
6.0 °C
Piping Length: 5.0 meters; Piping Lift: 0 meter
dB: Dry Bulb; WB: Wet Bulb
24.0 °C
15.0 °C

SPECIFICATIONS
1-2
1.2. WALL TYPE (RAC-18WS WS WSC/25 C/35 C)
OUTDOOR UNIT RAC-18WSC RAC-25WSC RAC-35WSC
Nominal Cooling capacity (min - max) kW 1.8 ( 0.5 - 2.8 ) 2.5 ( 0.5 - 3.4 ) 3.5 (0.5 - 4.1 )
Nominal Heating capacity (min - max) kW 2.3(0.6 -4.8) 3.2(0.6 -5.8) 4.0(0.6 - 6.6)
Nominal cooling power input (min -
max) kW 0.300（0.070-
0.880）0.470（0.070- 0.960）0.805（0.070- 1.350）
Nominal heating power input (min -
max) kW 0.375（0.065-
1.620）0.570（0.065- 2.250）0.790（0.065- 2.450）
EER / COP 6.00/6.13 5.32/5.61 4.35/5.06
SEER / SCOP 7.41/4.60 8.50/4.68 8.50/4.72
Energy class (SEER/SCOP) A++/A++ A+++/A++ A+++/A++
Noise level cooling (sound pressure) dB(A) 46 48 49
Noise level heating (sound pressure) dB(A) 46 48 49
Noise level (sound power) dB(A) 60 62 63
Air flow (Cooling / Heating) m31860 / 1620/h 1860 / 1620 1920 / 1620
Dimensions (H x W x D) mm 600x792x299 600x792x299 600x792x299
Weight kg 40 40 40
Colour Beige (5Y7/2) Beige (5Y7/2) Beige (5Y7/2)
Power supply 230V / 1Ph / 50Hz 230V / 1Ph / 50Hz 230V / 1Ph / 50Hz
Recommended fuse size A 25 25 25
Starting current (C/H) A 2.32/2.42 3.37/3.53 4.67/4.88
Running current (C/H) A 0.30-3.83/0.28-7.04 0.30-4.17/0.28-9.78 0.30-5.87/0.28-10.65
Cable section (Power) mm
2
1.50x 2+EARTH 1.50x 2+EARTH 1.50x 2+EARTH
Cable section (Interconnection) mm
2
1.50x 3+EARTH 1.50x 3+EARTH 1.50x 3+EARTH
Piping diameter (Liq / Gas) 1/4" / 1/2" 1/4" / 1/2" 1/4" / 1/2"
Minimum piping length m 3 3 3
Maximum piping length / height
difference
m 20 / 10 20 / 10 20 / 10
Current quantity of refrigerant /
Chargeless
kg 1.35 1.35 1.35
Chargeless / Additional refrigerant
charge
m / g/m 20/- 20/- 20/-
Working range (cooling / heating) °C -10~43/-20~21 -10~43/-20~21 -10~43/-20~21
Refrigerant R410A R410A R410A
Condenser Fan Propeller Fan Propeller Fan Propeller Fan
Compressor
Type
SCROLL
SCROLL SCROLL SCROLL
Oil Charge
380
380 380 380
Oil Type
poe
poe poe
Coil Resistance
2.23 at
20
℃
2.23 at 20℃2.23 at 20℃°C2.23 at 20
Quantity
1
1 1 1
NOTE:
1. The Sound Pressure Level is based on the following conditions:
-1 meter from the unit front surface and 1 meter from floor level
The above data was measured in an anechoic chamber. Please take into consideration reflected sound of your
specific site
poe

DIMENSIONAL DATA
2-1
2 DIMENSIONAL DATA
2.1. WALL TYPE: RAK-18PS PS PSC/25 C/35 C
12.7

DIMENSIONAL DATA
2-2
2.2. WALL TYPE: RAC-18WSC/25WSC/35WSC
Unit: mm
600
345
299
202
163.5
589
92
59
792
877
55
57
190
147
12
(11)
Drain hole
Drain hole
AIR SUCTION
View from the rear
Drain hole

CAPACITIES TABLE
3-1
3 CAPACITIES TABLE
3.1. CAPACITY CHARACTERISTIC CURVES
The following charts show the characteristics of outdoor unit capacity, which corresponds with the operating ambient
temperature of outdoor unit.
Condition:
①Pipe length / height difference : 5m / 0m ③Capacity loss due to white frost and defrost operation is not
included.
②Indoor fan speed at High mode
3.1.1. RAK-18PS -18WSC/RAC C
COOLING [50Hz, 230V]
INDOOR OUTDOOR TEMPERATURE (°CDB)
EWB
EDB
-10
21
27
32
35
40
43
°C
°C
TC
SHC
PI
TC
SHC
PI
TC
SHC
PI
TC
SHC
PI
TC
SHC
PI
TC
SHC
PI
TC
SHC
PI
12.0
18
2636
2416
315
1692
1825
212
1566
1685
250
1476
1597
276
1422
1527
288
1332
1439
309
1278
1369
321
14.0
20
2636
2416
315
1818
1825
212
1692
1702
253
1584
1597
279
1530
1544
291
1422
1439
312
1368
1386
327
16.0
22
2636
2571
320
1944
1825
215
1800
1702
256
1692
1597
282
1638
1544
297
1530
1439
318
1476
1386
330
18.0
25
2827
2756
325
2070
1983
218
1908
1843
259
1800
1737
285
1728
1667
297
1620
1562
321
1548
1492
333
19.0
27
2922
2849
330
2142
2088
220
1980
1931
262
1872
1825
288
1800
1755
300
1692
1650
321
1620
1580
333
22.0
30
3240
2818
330
2376
2071
220
2196
1913
262
2070
1808
291
1998
1737
303
1800
1685
333
1674
1650
351
24.0
32
3462
2818
335
2538
2071
223
2340
1913
265
2214
1808
291
2124
1737
306
1872
1720
342
1710
1702
363
HEATING [50Hz, 230V]
INDOOR OUTDOOR TEMPERATURE (°CDB)
EDB -15 -10 -7 -5 0 7 10 15
°C TC SHC PI TC SHC PI TC SHC PI TC SHC PI TC SHC PI TC SHC PI TC SHC PI TC SHC PI
16 2357 0 1081 2687 0 1151 2901 0 1204 3043 0 1239 3396 0 1302 2325 0 346 2537 0 356 2928 0 373
18 2334 0 1070 2664 0 1135 2874 0 1179 3013 0 1208 3360 0 1271 2314 0 364 2528 0 371 2916 0 391
20 2300 0 1055 2640 0 1120 2848 0 1159 2987 0 1185 3332 0 1250 2300 0 375 2473 0 388 2898 0 409
22
2269
0
1117
2618
0
1108
2813
0
1137
2944
0
1156
3296
0
1250
2286
0
390
2500
0
402
2884
0
426
24
2234
0
1026
2593
0
1094
2787
0
1115
2917
0
1128
3268
0
1190
2272
0
405
2486
0
418
2843
0
443
3.1.2. RAK-25PS -25WSC/RAC C
COOLING [50Hz, 230V]
INDOOR OUTDOOR TEMPERATURE (°CDB)
EWB EDB -10 21 27 32 35 40 43
°C °C TC SHC PI TC SHC PI TC SHC PI TC SHC PI TC SHC PI TC SHC PI TC SHC PI
12.0
18
2964
2410
400
2350
2250
332
2175
2076
392
2050
1968
432
1975
1882
451
1850
1774
484
1775
1687
503
14.0
20
2964
2410
400
2525
2250
332
2350
2098
396
2200
1968
437
2125
1903
456
1975
1774
489
1900
1709
512
16.0
22
2964
2565
406
2700
2250
337
2500
2098
401
2350
1968
442
2275
1903
465
2125
1774
498
2050
1709
517
18.0
25
3179
2750
412
2875
2444
341
2650
2271
405
2500
2141
447
2400
2055
465
2250
1925
503
2150
1839
522
19.0
27
3286
2843
418
2975
2574
345
2750
2379
410
2600
2250
451
2500
2163
470
2350
2033
503
2250
1947
522
22.0
30
3643
2812
418
3300
2552
345
3050
2358
410
2875
2228
456
2775
2141
475
2500
2076
522
2325
2033
550
24.0 32
3893
2812
425
3525
2552
350
3250
2358
415
3075
2228
456
2950
2141
479
2600
2120
536
2375
2098
569
EWB : Evaporator Wet Bulb temperature (
°
C)
TC : Total Capacity (W)
EDB : Evaporator Dry Bulb temperature (
°
C)
SHC : Sensible Heating Capacity (W)
(
°
CDB) : Outdoor Unit Inlet Air Dry Temperature (
°
C)
PI : Power Input

CAPACITIES TABLE
3-2
HEATING [50Hz, 230V]
INDOOR
OUTDOOR TEMPERATURE (°CDB)
EDB
-15
-10
-7
-5
0
7
10
15
°C
TC
SHC
PI
TC
SHC
PI
TC
SHC
PI
TC
SHC
PI
TC
SHC
PI
TC
SHC
PI
TC
SHC
PI
TC
SHC
PI
16 3279 0 1505 3556 0 1591 3738 0 1658 3859 0 1703 4160 0 1779 3235 0 526 3530 0 540 4074 0 567
18
3247
0
1489
3526
0
1569
3703
0
1624
3821
0
1661
4116
0
1738
3219
0
553
3517
0
564
4058
0
594
20
3200
0
1468
3494
0
1548
3670
0
1597
3788
0
1629
4082
0
1709
3200
0
570
3440
0
590
4032
0
621
22
3157
0
1555
3464
0
1532
3626
0
1566
3734
0
1589
4038
0
1709
3181
0
593
3478
0
612
4013
0
647
24 3108 0 1428 3432 0 1512 3592 0 1535 3699 0 1551 4004 0 1627 3162 0 616 3459 0 635 3955 0 673
3.1.3. RAK-35PS /RAC-35WSCC
COOLING [50Hz, 230V]
INDOOR OUTDOOR TEMPERATURE (°CDB)
EWB
EDB
-10
21
27
32
35
40
43
°C
°C
TC
SHC
PI
TC
SHC
PI
TC
SHC
PI
TC
SHC
PI
TC
SHC
PI
TC
SHC
PI
TC
SHC
PI
12.0
18
2954
2142
487
3011
2570
521
2787
2372
614
2870
2457
741
2765
2349
773
2590
2214
829
2485
2106
861
14.0
20
2954
2142
487
3235
2570
521
3011
2397
621
3080
2457
749
2975
2376
781
2765
2214
837
2660
2133
877
16.0
22
2954
2279
495
3460
2570
528
3203
2397
628
3290
2457
757
3185
2376
797
2975
2214
853
2870
2133
886
18.0
25
3168
2444
502
3684
2792
534
3396
2595
635
3500
2673
765
3360
2565
797
3150
2403
861
3010
2295
894
19.0
27
3275
2526
510
3812
2941
541
3524
2718
643
3640
2808
773
3500
2700
805
3290
2538
861
3150
2430
894
22.0
30
3631
2499
510
4228
2916
541
3908
2694
643
4025
2781
781
3885
2673
813
3500
2592
894
3255
2538
942
24.0
32
3880
2499
518
4517
2916
548
4164
2694
650
4305
2781
781
4130
2673
821
3640
2646
918
3325
2619
974
HEATING [50Hz, 230V]
INDOOR OUTDOOR TEMPERATURE (°CDB)
EDB -15 -10 -7 -5 0 7 10 15
°C TC SHC PI TC SHC PI TC SHC PI TC SHC PI TC SHC PI TC SHC PI TC SHC PI TC SHC PI
16 3689 0 1609 4017 0 1716 4231 0
1766
4375 0 1799 4730 0 1864 4044 0 729 4412 0 749
5092
0
786
18 3653 0 1592 3983 0 1693 4192 0
1729
4332 0 1753 4680 0 1820 4024 0 766 4396 0 782
5072
0
823
20 3600 0 1570 3947 0 1670 4155 0
1700
4294 0 1720 4641 0 1790 4000 0 790 4300 0 818
5040
0
861
22
3551
0
1663
3913
0
1653
4105
0
1668
4232
0
1677
4591
0
1790
3976
0
822
4348
0
848
5016
0
897
24
3497
0
1527
3877
0
1632
4067
0
1635
4193
0
1637
4552
0
1704
3952
0
853
4324
0
880
4944
0
933
EWB : Evaporator Wet Bulb temperature (
°
C)
TC : Total Capacity (W)
EDB : Evaporator Dry Bulb temperature (
°
C)
SHC : Sensible Heating Capacity (W)
(
°
CDB) : Outdoor Unit Inlet Air Dry Temperature (
°
C)
PI : Power Input

CAPACITIES TABLE
3-3
3.2. CORRECTION FACTORS ACCORDING TO PIPING LENGTH
Correction Factor for
Cooling Capacity
according to
Piping Length
The cooling capacity should be corrected according to the
following formula:
CCA = CC x F
CCA:Actual Corrected Cooling Capacity
(kcal/h)
CC: Cooling Capacity in the Performance
Table (kcal/h)
F: Correction Factor Based on the
Equivalent Piping Length
Correction Factor for
Heating Capacity
according to
Piping Length
The heating capacity should be corrected according to the
following formula:
HCA= HC x F
HCA:Actual Corrected Heating Capacity
(kcal/h)
HC: Heating Capacity in the Performance
Table (kcal/h)
F: Correction Factor Based on the
Equivalent Piping Length
The correction factors are shown in the following figure.
Equivalent Piping Length for:
– One 90º Elbow is 0.5m.
– One 180º Curve is 1.5m.
H: Vertical Distance Between Indoor Unit and Outdoor
Units in Meters
L: Actual One-Way Piping Length Between Indoor Unit
and Outdoor Unit in Meters
EL: Equivalent Total Distance Between Indoor Unit and
Outdoor Unit in Meters
(Equivalent One-Way Piping Length)
Models : RAK-18PS -18WS -25PS -25WS -35PS -35WSC/RAC C, RAK C/RAC C, RAK C/RAC C
Cooling Change Ratio
Heating Change Ratio
Pipe length (m)
Pipe length (m)
0.6
0.7
0.8
0.9
1.0
0 5 10 15 20
0.6
0.7
0.8
0.9
1.0
0 5 10 15 20
H
L

CAPACITIES TABLE
3-4
3.3. CORRECTION FACTORS ACCORDING TO DEFROSTING OPERATION
The heating capacity in the preceding paragraph, excludes the condition of the frost or the defrosting operation period. In
consideration of the frost or the defrosting operation, the heating capacity is corrected by the equation below.
Corrected heating capacity = Defrost Correction factor x unit capacity
OUTDOOR TEMPERATURE (°CDB) -15 -10 -5 0 7 10 15
Correction factor (humidity rate85% RH) 0.95 0.95 0.91 0.81 1.0 1.0 1.0
Correction Factor
NOTE:
The correction factor is not valid for special conditions such as snowfall or operation in a transitional period.
Heating
capacity
1 cycle
Hour
Defrost max. 12mins
Reduction in
capacity due to white
frost

SOUND DATA
4-1
4 SOUND DATA
4.1. RAC-18WSC
COOLING
HEATING
The Sound Pressure Level is based on the following conditions:
1 meter from the unit front surface and 1 meter from floor level
The above data was measured in an anechoic chamber. Please take into consideration reflected sound of your specific site
35.9 36.9
43.7 44.8 47.2
41.5 38.1 34.4
NC-15
NC-20
NC-25
NC-30
NC-35
NC-40
NC-45
NC-50
NC-55
NC-60
NC-65
NC-70
0
10
20
30
40
50
60
70
80
90
63
125
250
500
1000
2000
4000
8000
Sound Pressure Level (dB)
Octave band main wave length (Hz)
33.5 36.8
42.8 42.8 44.6
37.6 33.2 34.1
NC-15
NC-20
NC-25
NC-30
NC-35
NC-40
NC-45
NC-50
NC-55
NC-60
NC-65
NC-70
0
10
20
30
40
50
60
70
80
90
63 125 250 500 1000 2000 4000 8000
Sound Pressure Level (dB)
Octave band main wave length (Hz)

SOUND DATA
4-2
4.2. RAC-25WSC
COOLING
HEATING
The Sound Pressure Level is based on the following conditions:
1 meter from the unit front surface and 1 meter from floor level
The above data was measured in an anechoic chamber. Please take into consideration reflected sound of your specific site
35.6 37
44.2 44.4 47
41.4
33.9 34.4
NC-15
NC-20
NC-25
NC-30
NC-35
NC-40
NC-45
NC-50
NC-55
NC-60
NC-65
NC-70
0
10
20
30
40
50
60
70
80
90
63 125 250 500 1000 2000 4000 8000
Sound Pressure Level (dB)
Octave band main wave length (Hz)
33.5 34.0
43.3 42.6 44.8
38.5
32.0 34.0
NC-15
NC-20
NC-25
NC-30
NC-35
NC-40
NC-45
NC-50
NC-55
NC-60
NC-65
NC-70
0
10
20
30
40
50
60
70
80
90
63
125
250
500
1000
2000
4000
8000
Sound Pressure Level (dB)
Octave band main wave length (Hz)

SOUND DATA
4-3
4.3. RAC-35WSC
COOLING
HEATING
The Sound Pressure Level is based on the following conditions:
1 meter from the unit front surface and 1 meter from floor level
The above data was measured in an anechoic chamber. Please take into consideration reflected sound of your specific site
36.1 39.1
47.5 45.6 48.4 43 38.2 35
NC-15
NC-20
NC-25
NC-30
NC-35
NC-40
NC-45
NC-50
NC-55
NC-60
NC-65
NC-70
0
10
20
30
40
50
60
70
80
90
63
125
250
500
1000
2000
4000
8000
Sound Pressure Level (dB)
Octave band main wave length (Hz)
33.6 35.8
44.0 45.6 48.7
42.6
34.2 34.3
NC-15
NC-20
NC-25
NC-30
NC-35
NC-40
NC-45
NC-50
NC-55
NC-60
NC-65
NC-70
0
10
20
30
40
50
60
70
80
90
63
125
250
500
1000
2000
4000
8000
Sound Pressure Level (dB)
Octave band main wave length (Hz)

WORKING RANGE
5-1
5 WORKING RANGE
5.1. POWER SUPPLY
Working Voltage 207V ~ 253V
Voltage Imbalance Within a 3% Deviation from Each Voltage at the Main Terminal of
Outdoor Unit
Starting Voltage Higher than 85% of the Rated Voltage
5.2. WORKING RANGE
Applicable models:
RAC-18WSC
RAC-25WSC
RAC-35WSC
The temperature range is indicated in the following table.
Cooling
Heating
working range min (oC) max (oC) rated (oC) working range min (oC) max (oC) rated (oC)
outdoor -10 43 35 outdoor -20 21 7
indoor 16 32 27 indoor 16 32 20
-20
-10
0
10
20
30
40
50
-10 -5 0 5 10 15 20 25 30 35 40
Cooling working range
-30
-20
-10
0
10
20
30
40
-10 -5 0 5 10 15 20 25 30 35 40
Heating working range
Indoor Temperature
Indoor Temperature
Ambient Temperature
COOLING
HEATING
Ambient Temperature

ELECTRICAL DATA
6-1
6 ELECTRICAL DATA
6.1. INDOOR UNIT
Model Unit Main Power Applicable Current Indoor Fan Motor
VOL, PH, Hz Fuse Rating (A) STC RNC RNC IPT
RAK-18PSC 230, 1, 50 3.15 (C) 2.32 (H) 2.42 (C) 7.04 (H) 3.83 0.3 30
RAK-25PSC 230, 1, 50 3.15 (C) 3.37(H) 3.53 (C) 9.78 (H) 4.17 0.3 30
RAK-35PSC 230, 1, 50 3.15 (C)4.67 (H) 4.88 (C) 10.65 (H) 5.87 0.3 30
VOL: Rated Unit Power Supply Voltage (V) RNC: Running Current (A)
Hz: Frequency (Hz) PH: Phase (φ)
STC: Starting Current (A) IPT: Input (W)
6.2. OUTDOOR UNIT
Model
Unit Main Power Compressor Motor
VOL, PH, Hz Fuse Rating (A) Min (V) Max (V) Locked Rotor Ampere (A) STC Cooling Operation Heating Operation
RNC IPT RNC IPT
RAC-18WSC 230, 1, 50 25 207 253 2.42 7.04 300 3.83 375
RAC-25WSC 230, 1, 50 25 207 253 3.53 9.78 470 4.17 570
RAC-35WSC 230, 1, 50 25 207 253 4.88 10.65 805 5.87 790
VOL: Rated Unit Power Supply Voltage (V) RNC: Running Current (A)
HZ: Frequency (Hz) PH: Phase (φ)
STC: Starting Current (A) IPT: Input (W)
NOTE:
1. The above compressor data is based on 100% capacity combination of indoor units at the rated operating frequency
2. This data is based on the same conditions as the nominal heating and cooling capacities.
3. The compressor started by an inverter, resulting in extremely low starting current.

WIRING DIAGRAM
7-1
7 WIRING DIAGRAM
7.1. RAK-18PS -25PS -35PSC, RAK C, RAK C

WIRING DIAGRAM
7-2
7.2. RAC-18WS -25WS -35WSC, RAC C, RAC C

REFRIGERANT CYCLE
CYC8-1L
8 REFRIGERANT CYCLE
8.1. WALL TYPE: RAK-18PS /25PS /35PS / RAC-18WS /25WS /35WSCCCC C C

CONTROL AND FUNCTION
9-1
9 CONTROL AND FUNCTION
9.1. WIRELESS REMOTE CONTROL FUNCTION
BUTTONS
FUNCTION
MODE Selector
Use this button to select the operationg mode. Every time you press this button, the
mode will change from
cyclically.
FAN SPEED Selector Button
This determines the fan speed. Every time you press this button, the airflow rate will
change from (This button
allows selection of optimal or preferred fan speed for each operation mode).
START/STOP button
Press this button to start operation. Press it again to stop operation.
ECO button
Use this button to set the ECO mode.
POWERFUL button
Use this button to set the POWERFUL mode.
SILENT button
Use this button to set the SILENT mode.
INFO button
1) Press this button to display temperature for 10 seconds.
2) Press this button to check monthly power consumption.
3) Press this button to recieve the current calendar and clock.
ECO SLEEP TIMER button
Use this button to set the ECO sleep timer.
AUTO SWING (Vertical) button
Controls the angle of the horizontal air deflector.
WIND MODE button
Controls the angle of the vertical air deflector, direct airflow and indirect airflow.
LEAVE HOME button
Prevent the room temperature from falling too much by setting temperature 10°C
automatically when no on is at home.
WEEKLY TIMER buttons
ON/OFF TIMER button
The device will turn on (off) and off (on) at the designated time.
TIME button
Press the button to set starting time of the program
OK button
Press the button to save the program. The button shall be pressed everytime after
finishing a program setting.
DELETE button
1) Press the button to delete the selected program.
2) Press the button for about 10 seconds by directing the remote controller
towards the indoor unit while Mode A or B display blinks, programs for Mode A
or B will be deleted both from the indoor unit and the remote controller after the
beep sound from the indoor unit.
DAY button
Select the desired day of the week.
PROGRAM NO. button
Press this button to select a program number.
CANCEL
1) Press the button to cancel the current setting process on the screen.
2)
Press the button by directing the remote controller towards the indoor unit, hen
weekly timer setting will be canceled from indoor unit after the beep sound from
the indoor unit. The program setting remains in the remote controller.
SEND button
Press the button for about 3 seconds by directing the remote controller towards the
indoor unit after finishing the program setting. Timer lamp on the indoor unit will blink
rapidly and after the beep soung from indoor unit, TIMER lamp will light up.
CLOCK button
Press the button to set calendar and clock.
WEEKLY TIMER MODE button
1) Select Mode A or Mode B. 2 modes can be set and stored as a weekly timer.
2) By pressing the button longer than 3 seconds, program setting screen will
appear.
RAR-5W2
RAR-5W2