Hitachi RAC-18WPB User manual

TECHNICAL CATALOGUE
MONO SPLIT
RAK-18RPB
RAK-25RPB
RAC-18WPB
RAC-25WPB
RAC-35WPB
RAK-35RPB
RAK-50RPB
RAC-50WPB
Библиотека СОК 

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_____________________________________________________________________ 3
1.1. WALL TYPE (RAK-18RPB/25RPB/35RPB/50RPB)____________________________________________ 3
1.2. WALL TYPE (RAC-18WPB/25WPB/35WPB/50WPB)__________________________________________ 4
2DIMENSIONAL DATA__________________________________________________________________ 5
2.1. WALL TYPE: RAK-18RPB/25RPB_________________________________________________________ 5
2.2. WALL TYPE: RAK-35RPB/50RPB_________________________________________________________ 6
2.3. WALL TYPE: RAC-18WPB/25WPB________________________________________________________ 7
2.4. WALL TYPE: RAC-35WPB ______________________________________________________________ 8
2.5. WALL TYPE: RAC-50WPB ______________________________________________________________ 9
3CAPACITIES TABLE _________________________________________________________________ 10
3.1. CAPACITY CHARACTERISTIC CURVES__________________________________________________ 10
3.1.1. RAK-18RPB/RAC-18WPB______________________________________________________________ 10
3.1.2. RAK-25RPB/RAC-25WPB______________________________________________________________ 11
3.1.3. RAK-35RPB/RAC-35WPB______________________________________________________________ 11
3.1.4. RAK-50RPB/RAC-50WPB______________________________________________________________ 12
3.2. CORRECTION FACTORS ACCORDING TO PIPING LENGTH _________________________________ 13
3.3. CORRECTION FACTORS ACCORDING TO DEFROSTING OPERATION ________________________ 15
4SOUND DATA_______________________________________________________________________ 16
4.1. RAC-18WPB ________________________________________________________________________ 16
4.2. RAC-25WPB ________________________________________________________________________ 17
4.3. RAC-35WPB ________________________________________________________________________ 18
4.4. RAC-50WPB ________________________________________________________________________ 19
5WORKING RANGE ___________________________________________________________________ 20
5.1. POWER SUPPLY ____________________________________________________________________ 20
5.2. WORKING RANGE ___________________________________________________________________ 20
6ELECTRICAL DATA __________________________________________________________________ 21
6.1. INDOOR UNIT_______________________________________________________________________ 21
6.2. OUTDOOR UNIT_____________________________________________________________________ 21
7WIRING DIAGRAM ___________________________________________________________________ 22
7.1. RAK-18RPB, RAK-25RPB, RAK-35RPB, RAK-50RPB ________________________________________ 22
7.2. RAC-18WPB, RAC-25WPB, RAC-35WPB _________________________________________________ 23
7.3. RAC-50WPB ________________________________________________________________________ 24
8REFRIGERANT CYCLE_______________________________________________________________ 25
8.1. WALL TYPE: RAK-18RPB/25RPB / RAC-18WPB/25WPB _____________________________________ 25
8.2. WALL TYPE: RAK-35RPB / RAC-35WPB__________________________________________________ 25
8.3. WALL TYPE: RAK-50RPB / RAC-50WPB__________________________________________________ 26
9CONTROL AND FUNCTION____________________________________________________________ 27
9.1. WIRELESS REMOTE CONTROL FUNCTION ______________________________________________ 27
9.2. AUTO CHANGEOVER ________________________________________________________________ 29
9.3. SHIFT VALUE _______________________________________________________________________ 29
9.4. OPERATION LOCK___________________________________________________________________ 30
9.5. SETTING THE PREVENTION OF MUTUAL INTERFERENCE__________________________________ 30
9.6. INTERMITTENT FAN SPEED SETTING___________________________________________________ 31
9.7. FAN SPEED SETTING IN THERMO OFF IN COOLING_______________________________________ 32
9.8. ERROR CODE INFORMATION__________________________________________________________ 33
9.9. ADDITIONAL FUNCTION VIA DIP-SWITCH SETTINGS ______________________________________ 35
9.9.1. AUTO RESTART FUNCTION ___________________________________________________________ 35
9.9.2. HEATING/COOLING ONLY MODE SELECTION ____________________________________________ 35

CONTENTS
2
10 OPTION LIST _______________________________________________________________________ 36
10.1. WIRED REMOTE CONTROL – SPX-RCDB ________________________________________________ 36
10.1.1. SHIFT VALUE _______________________________________________________________________ 36
10.1.2. ERROR CODE INFORMATION__________________________________________________________ 37
10.2. H-LINK ADAPTOR – PSC 6RAD_________________________________________________________ 40
10.2.1. SAFETY SUMMARY __________________________________________________________________ 40
10.2.2. INSTALLATION WORK________________________________________________________________ 40
10.2.3. ELECTRICAL WIRING ________________________________________________________________ 41
10.2.4. DIP SWITCH SETTING ________________________________________________________________ 42
10.2.5.TEST RUN__________________________________________________________________________ 43
10.3. DRY CONTACT (SPX-WDC3) APPLICATION (USING DIP SWITCH) ____________________________ 44
10.4. DISTRIBUTOR – SPX-DST1____________________________________________________________ 46

SPECIFICATIONS
3
1SPECIFICATIONS
1.1. WALL TYPE (RAK-18RPB/25RPB/35RPB/50RPB)
INDOOR
Unit
RAK-18RPB
RAK-25RPB
RAK-35RPB
RAK-50RPB
Nominal capacity adjustable no no no no
Nominal Cooling capacity (min - max) kW 2.00
(0.90 - 2.50)
2.50
(0.90 - 3.10)
3.50
(0.90- 4.00)
5.00
(1.90- 5.20)
Cooling sensible capacity kW 1.9 2.2 2.7 3.8
Nominal Heating capacity (min - max) kW 2.50
(0.90 - 3.20)
3.40
(0.90- 4.40)
4.20
(0.90- 5.00)
6.00
(2.2- 7.30)
Noise level cooling (sound pressure)
(SL / L / M / H)
dB(A) 21/24/33/37 22/24/33/40 25/26/36/43 25/28/39/46
Noise level heating (sound pressure)
(SL / L / M / H)
dB(A) 19/22/33/38 20/23/34/41 26/27/36/44 27/31/39/46
Noise level (sound power) dB(A) 51 54 57 60
Air flow cooling mode (SL / L / M / H) m3
312 / 350 /
/h
400 / 440
333 / 370 /
430 / 510
353 / 420 /
485 / 680
353 / 410 /
540 / 750
Air flow heating mode (SL / L / M / H) m3
312 / 350 /
/h
420 / 480
333 / 400 /
500 / 570
363 / 480 /
570 / 780
380 / 500 /
610 / 820
Fan Motor W 30 30 30 30
Dehumidification l/h 1.2 1.4 1.6 2
Dimensions (H x W x D) mm 280 x 780 x 218 280 x 780 x 218 295 x 900 x 230 295 x 900 x 230
Weight kg 7.5 7.5 10 10
Colour White (N9.5) White (N9.5) White (N9.5) White (N9.5)
Condensate Drain mm φ16 φ16 φ16 φ16
Running current (C/H) A
1.09-4.39 /
1.09-4.22
1.09-5.61 /
1.09-5.43
1.09-6.35 /
1.09-7.39
2.17-9.13 /
2.17-11.96
Power supply
230V / 1Ph /
50Hz
230V / 1Ph /
50Hz
230V / 1Ph /
50Hz
230V / 1Ph /
50Hz
Cable section (Interconnection) mm²
1.50 x 3 +
EARTH
1.50 x 3 +
EARTH
1.50 x 3 +
EARTH
2.50 x 3 +
EARTH
Piping diameter (Liq / Gas) Inch 1/4" / 3/8" 1/4" / 3/8" 1/4" / 3/8" 1/4" / 1/2"
Drain diameter (ext) mm φ16 φ16 φ16 φ16
Remote control (standard/optional)
RAR-6N2/
SPX-RCDB
RAR-6N2/
SPX-RCDB
RAR-6N1/
SPX-RCDB
RAR-6N1/
SPX-RCDB
Filter
ACL Filter Wasabi Wasabi Wasabi Wasabi
ACL part name SPX-CFH22 SPX-CFH22 SPX-CFH22 SPX-CFH22
Pre-filter (Standard/Optional)
Wasable/
Stainless-SPX-
SPF6
Wasable/
Stainless-SPX-
SPF6
Wasable/
Stainless-SPX-
SPF7
Wasable/
Stainless-SPX-
SPF7
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

SPECIFICATIONS
4
1.2. WALL TYPE (RAC-18WPB/25WPB/35WPB/50WPB)
OUTDOOR
UNIT
RAC-18WPB
RAC-25WPB
RAC-35WPB
RAC-50WPB
Nominal Cooling capacity (min - max) kW 2.00 (0.90 - 2.50) 2.50 (0.90 - 3.10) 3.50 (0.90 - 4.00) 5.00 (1.90 - 5.20)
Nominal Heating capacity (min - max) kW 2.50 (0.90 - 3.20) 3.40 (0.90 - 4.40) 4.20 (0.90 - 5.00) 6.00 (2.2 - 7.30)
Nominal cooling power input (min - max) kW 0.55 (0.25 - 1.01) 0.70 (0.25 - 1.29) 1.090 (0.25 - 1.46) 1.560 (0.50 - 2.10)
Nominal heating power input (min - max) kW 0.58 (0.25 - 0.97) 0.88 (0.25 - 1.25) 1.100 (0.25 - 1.70) 1.660 (0.50 - 2.75)
EER / COP 3.64/4.31 3.57/3.86 3.21/3.82 3.21/3.61
SEER / SCOP 7.0/4.30 7.60/4.40 7.20/4.60 7.20/4.41
Energy class (SEER/SCOP) A++/A+ A++/A+ A++/A++ A++/A+
Noise level cooling (sound pressure) dB(A) 46 48 49 51
Noise level heating (sound pressure) dB(A) 47 49 50 51
Noise level (sound power) dB(A) 60 62 63 65
Air flow (Cooling / Heating) m31860/1620/h 1860/1620 1920/1620 2160/2160
Dimensions (H x W x D) mm 530 x 660 x 278 530 x 660 x 278 548 × 750 × 288 600 x 792 x 299
Weight kg 27.5 27.5 34 40
Colour Beige (5Y7/2) Beige (5Y7/2) Beige (5Y7/2) Beige (5Y7/2)
Power supply 230V / 1Ph / 50Hz 230V / 1Ph / 50Hz 230V / 1Ph / 50Hz 230V / 1Ph / 50Hz
Recommended fuse size A 15 15 15 25
Starting current (C/H) A 3.34/3.49 4.36/4.56 5.27/5.51 7.59/7.93
Running current (C/H) A
1.09-4.39/
1.09-4.22
1.09-5.61/
1.09-5.43
1.09-6.35/
1.09-7.39
2.17-9.13/
2.17-11.96
Cable section (Power) mm21.50 x 2 + EARTH 1.50 x 2 + EARTH 1.50 x 2 + EARTH 2.50 x 2 + EARTH
Cable section (Interconnection) mm21.50 x 3 + EARTH 1.50 x 3 + EARTH 1.50 x 3 + EARTH 2.50 x 3 + EARTH
Piping diameter (Liq / Gas) 1/4" / 3/8" 1/4" / 3/8" 1/4" / 3/8" 1/4" / 1/2"
Minimum piping length m 3 3 3 3
Maximum piping length / height difference m 20 / 10 20 / 10 20 / 10 20 / 10
Current quantity of refrigerant / Chargeless kg 0.950 0.950 1.050 1.250
Chargeless / Additional refrigerant charge
m /
g/m 20/- 20/- 20/- 20/-
Working range (cooling / heating) °C
-10 ~ 43 /
-15 ~ 21
-10 ~ 43 /
-15 ~ 21
-10 ~ 43 /
-15 ~ 21
-10 ~ 43 /
-15 ~ 21
Refrigerant R410A R410A R410A R410A
Condenser Fan
Propeller Fan
Propeller Fan
Propeller Fan
Propeller Fan
Compressor
Type
ROTARY ROTARY ROTARY ROTARY
Oil Charge mL 320±20 320±20 320±20 370±20
Oil Type
α68HES - H or
equivalent
α68HES - H or
equivalent
α68HES - H or
equivalent
FV50S
Coil Resistance
Ω
1.625 at 20
℃
1.625 at 20
℃
1.625 at 20
℃
1.4 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

DIMENSIONAL DATA
5
2DIMENSIONAL DATA
2.1. WALL TYPE: RAK-18RPB/25RPB
Top air suction grille
Front panel
Cabinet
Horizontal air deflector
Air outlet
Mounting plate
Drain hose
About 370
About 108
Drain
Drain cap connection port
About
70
When piping is drawn
from the left side,
exchange the drain
hose and the drain
cap.
Vertical air deflector
Narrow pipe-(φ6.35)
Wide pipe-(φ9.52)
218
780
47
47
400
190
190
70
70
60
60
60
60
5
5
280
47
47

DIMENSIONAL DATA
6
2.2. WALL TYPE: RAK-35RPB/50RPB

DIMENSIONAL DATA
7
2.3. WALL TYPE: RAC-18WPB/25WPB

DIMENSIONAL DATA
8
2.4. WALL TYPE: RAC-35WPB

DIMENSIONAL DATA
9
2.5. WALL TYPE: RAC-50WPB
Unit: mm

CAPACITIES TABLE
10
3CAPACITIES 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.
Conditions:
①Pipe length / height difference : 5m / 0m ③Capacity loss due to white frost and defrost operation is not included.
②
Indoor fan speed at High mode
3.1.1. RAK-18RPB/RAC-18WPB
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
1556
1371
307
1763
1828
364
1631
1688
430
1640
1706
506
1580
1631
528
1480
1538
567
1420
1463
589
14.0 20
1556
1371
307
1894
1828
364
1763
1705
435
1760
1706
512
1700
1650
534
1580
1538
572
1520
1481
600
16.0 22
1556
1459
312
2025
1828
369
1875
1705
440
1880
1706
517
1820
1650
545
1700
1538
583
1640
1481
605
18.0 25
1669
1564
316
2156
1986
374
1988
1846
445
2000
1856
523
1920
1781
545
1800
1669
589
1720
1594
611
19.0 27
1725
1617
321
2231
2092
379
2063
1934
450
2080
1950
528
2000
1875
550
1880
1763
589
1800
1688
611
22.0 30
1913
1600
321
2475
2074
379
2288
1916
450
2300
1931
534
2220
1856
556
2000
1800
611
1860
1763
644
24.0 32
2044
1600
326
2644
2074
384
2438
1916
455
2460
1931
534
2360
1856
561
2080
1838
627
1900
1819
666
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
1725
662
2038
680
2218
698
2249
689
2335
655
2471
626
2660
639
2954
664
18
1738
656
2050
675
2234
689
2268
677
2355
642
2486
603
2674
615
2977
637
20
1750
650
2063
669
2250
680
2286
666
2375
630
2500
580
2688
591
3000
610
22
1763
644
2075
663
2266
671
2304
654
2395
618
2514
557
2701
567
3023
583
24
1775
638
2088
657
2282
662
2322
643
2415
605
2529
534
2715
543
3046
556
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
11
3.1.2. RAK-25RPB/RAC-25WPB
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
1945
1470
391
2203
1960
464
2039
1809
547
2050
1829
644
1975
1749
672
1850
1648
721
1775
1568
749
14.0 20
1945
1470
391
2367
1960
464
2203
1828
553
2200
1829
651
2125
1769
679
1975
1648
728
1900
1588
763
16.0 22
1945
1564
397
2531
1960
470
2344
1828
560
2350
1829
658
2275
1769
693
2125
1648
742
2050
1588
770
18.0 25
2086
1677
403
2695
2129
476
2484
1979
566
2500
1990
665
2400
1910
693
2250
1789
749
2150
1709
777
19.0 27
2156
1734
409
2789
2242
482
2578
2073
572
2600
2090
672
2500
2010
700
2350
1889
749
2250
1809
777
22.0 30
2391
1715
409
3094
2224
482
2859
2054
572
2875
2070
679
2775
1990
707
2500
1930
777
2325
1889
819
24.0 32
2555
1715
415
3305
2224
488
3047
2054
579
3075
2070
679
2950
1990
714
2600
1970
798
2375
1950
847
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
2466
1088
3091
1219
3457
1308
3436
1258
3396
1117
3361
949
3738
1032
4337
1172
18
2483
1079
3108
1210
3479
1294
3461
1240
3423
1099
3380
915
3756
995
4369
1131
20
2500
1070
3125
1201
3500
1280
3486
1223
3450
1080
3400
880
3775
959
4400
1090
22
2517
1061
3142
1192
3521
1266
3510
1205
3477
1061
3420
845
3794
922
4431
1049
24
2534
1052
3159
1184
3543
1252
3535
1188
3504
1
043
3439
811
3812
886
4463
1008
3.1.3. RAK-35RPB/RAC-35WPB
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
1816
1355
405
2056
1807
482
1903
1668
567
2870
2530
1003
2765
2419
1046
2590
2280
1123
2485
2168
1166
14.0 20
1816
1355
405
2209
1807
482
2056
1685
574
3080
2530
1014
2975
2446
1057
2765
2280
1134
2660
2196
1188
16.0 22
1816
1442
412
2363
1807
488
2188
1685
581
3290
2530
1025
3185
2446
1079
2975
2280
1155
2870
2196
1199
18.0 25
1947
1546
418
2516
1963
494
2319
1824
588
3500
2752
1036
3360
2641
1079
3150
2474
1166
3010
2363
1210
19.0 27
2013
1599
424
2603
2068
501
2406
1911
594
3640
2891
1046
3500
2780
1090
3290
2613
1166
3150
2502
1210
22.0 30
2231
1581
424
2888
2050
501
2669
1894
594
4025
2863
1057
3885
2752
1101
3500
2669
1210
3255
2613
1275
24.0 32
2384
1581
431
3084
2050
507
2844
1894
601
4305
2863
1057
4130
2752
1112
3640
2724
1243
3325
2697
1319
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
3008
1202
3789
1277
4247
1335
4225
1315
4183
1247
4152
1186
4623
1236
5372
1322
18
3029
1191
3810
1266
4273
1317
4255
1293
4216
1223
4176
1143
4646
1191
5411
1271
20
3050
1180
3831
1255
4300
1300
4286
1271
4250
1200
4200
1100
4669
1145
5450
1220
22
3071
1169
3852
1244
4327
1283
4316
1250
4284
1177
4224
1057
4692
1099
5489
1169
24
3092
1158
3873
1233
4353
1265
4347
1228
4317
1153
4248
1014
4715
1054
5528
1118
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
12
3.1.4. RAK-50RPB/RAC-50WPB
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
3037
2181
679
3668
3102
861
3395
2864
1014
4100
3478
1435
3950
3325
1498
3700
3134
1607
3550
2981
1669
14.0 20
3037
2181
679
3941
3102
861
3668
2894
1026
4400
3478
1451
4250
3363
1513
3950
3134
1622
3800
3019
1700
16.0 22
3037
2321
690
4215
3102
872
3902
2894
1038
4700
3478
1466
4550
3363
1544
4250
3134
1654
4100
3019
1716
18.0 25
3256
2489
701
4488
3371
883
4137
3132
1050
5000
3784
1482
4800
3631
1544
4500
3402
1669
4300
3249
1732
19.0 27
3366
2573
711
4644
3550
895
4293
3281
1062
5200
3975
1498
5000
3822
1560
4700
3593
1669
4500
3440
1732
22.0 30
3732
2545
711
5151
3520
895
4761
3251
1062
5750
3937
1513
5550
3784
1576
5000
3669
1732
4650
3593
1825
24.0 32
3988
2545
722
5502
3520
906
5073
3251
1074
6150
3937
1513
5900
3784
1591
5200
3746
1778
4750
3707
1888
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
3890
1743
4796
1831
5324
1903
5399
1888
5604
1826
5931
1790
6478
1850
7339
1954
18
3920
1727
4826
1814
5362
1876
5442
1856
5652
1790
5966
1725
6511
1781
7395
1877
20
3950
1710
4856
1798
5400
1850
5486
1823
5700
1755
6000
1660
6544
1713
7450
1800
22
3980
1693
4886
1781
5438
1824
5529
1790
5748
1720
6035
1595
6577
1644
7506
1723
24
4010
1677
4916
1764
5476
1797
5573
1757
5796
1684
6069
1530
6610
1575
7561
1646
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
13
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-18RPB/RAC-18WPB, RAK-25RPB/RAC-25WPB
Cooling Change Ratio
Heating Change Ratio
Pipe length (m)
Pipe length (m)
H
L

CAPACITIES TABLE
14
Models : RAK-35RPB/RAC-35WPB
Cooling Change Ratio
Heating Change Ratio
Pipe length (m)
Pipe length (m)
Models : RAK-50RPB/RAC-50WPB
Cooling Change Ratio
Heating Change Ratio
Pipe length (m)
Pipe length (m)

CAPACITIES TABLE
15
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 -7 -5 0 7 10 15
Correction factor (humidity rate85% RH) 0.95 0.95 0.89 0.85 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
16
4SOUND DATA
4.1. RAC-18WPB
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
32.1 27.3
34.4
43.3 40.7 36.4 32.6 33.1
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)
61.9 63.0
73.7 78.1 73.4 71.1 66.0
56.8
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
17
4.2. RAC-25WPB
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
33.6 33
44.9 45.9 45 41.2
35.8 33.5
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)
40.5 39.7
49.7
54.9
48.2 44.3
38.9 35.1
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
18
4.3. RAC-35WPB
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
41
32.6
44.3 45.2 43 40.1 36.1 34
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)
40.5 37.4
50.5 49.0 45.7 44.8 40.7 36.8
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)