Catalogue Air Handling Unit DDW Without Frame PDF

Engineer Data ED-DDW-201401B
DAIKIN DDW Air Handling Units

Horizontal Unit
Model: DDW020H-DDW450H
Air Flow: 2,000m3/h-45,000m3/h
Vertical Unit
Model: DDW040V-DDW450V
Air Flow: 4,000m3/h-45,000m3/h
Double Skin Air Handling Unit DDW
Literature No.: ED-DDW-201401B

Supersedes: ED-DDW-201311B
Contents
Nomenclature....................................................................................................................... 2
Features................................................................................................................................ 3
Specifications....................................................................................................................... 4
Fan Discharge Type............................................................................................................ 16
Selection Software............................................................................................................. 17
Special Notes...................................................................................................................... 18
Wiring Diagrams................................................................................................................. 19
Installation........................................................................................................................... 20
Servicing And Maintenance .............................................................................................. 22
Common Failures............................................................................................................... 24
Note: Installation and maintenance are to be performed only by qualified personnel who are
familiar with local codes and regulations, and experienced with this type of equipment.
Caution: Sharp edges and coil surfaces are a potential injury hazard. Avoid contact with them.
Warning: Moving machinery and electrical power hazard may cause severe personal injury or
death. Disconnect and lock off power before servicing equipment.
1
DDW Double Skin Air Handling Unit
Nomenclature
D D W 080 H R 08 -4 L- F F B E
Export
Design ID
Discharge Type
F - Horizontal Discharge Type
T - Top Discharge Type
Power Supply:
F - 380-415V/3N~/50Hz
R - 380V/3N~/60Hz
P - 208-230V/3N~/60Hz
Q - 460V/3N~/60Hz
Pipe Connection:
R - Left Hand
L - Right Hand
(Facing Air Discharge)
Coil Rows:
4 - 4 Rows
6 - 6 Rows
External Total Pressure
08 - 80 Pa; 15 - 150Pa
22 - 220Pa; 30 - 300Pa
Air Conditioning
R - Return Air
F - Fresh Air
Structure Type
H - Horizontal
V - Vertical
Air Flow
080 - 8000m3/h
DDW - Double-Skin AHU
2
Features
General Information
DAIKIN DDW air handling units are designed to meet the needs of the terminal air conditioning market. DDW
units are full featured handlers that are applicable for the central air-conditioning systems installed in hotels,
supermarkets, hospitals and office buildings.
Without Frame Type

DDW units are equipped with no frame structure patent of DAIKIN and prevent air leakage angle design,to ensure
no cold bridge and low leakage rate.
Casing
DDW Casing units is of double-skin panels and assembled with self supporting modular panel elements with an
integrated base frame made of galvanized steel. assembled 25mm polyurethane foam offer ideal heat/sound
insulation.
Filter
Washable nylon primary air filter, removable and easy installation. Bag filter is optional.
Coil Selection
All the computing results and the products built on these results have passed strict test. This ensures their safe,
reliable and effcient operation.
Certrifugal Fan
High efficient and quiet titled multi-blade double-intake fans.
Motor
V-belt driving,Class F,IP55 provide different amounts of air low and ETP to meet different needs.
3
Specifications
DDW-H (Horizontal)
Model DDW020H DDW030H DDW040H DDW050H DDW060H DDW080H

Nominal Air Flow (m3/h) 2000 3000 4000 5000 6000 8000
External I 80 80 80 - - -
total II 150 150 150 150 150 150
pressure III 220 220 220 220 220 220
(Pa) IV -- - - 300 300 300
Nominal 4 Rows (Return air) 12 17 24 30 37 49
cooling 4 Rows (Fresh air) 28 41 56 66 80 111
capacity 6 Rows (Return air) 15 23 32 38 46 61
(kW) 6 Rows (Fresh air) 34 52 67 86 103 136
heating 4 Rows (Fresh air) 32 48 65 80 97 130
(kW) 6 Rows (Fresh air) 37 56 75 93 112 149
Type Corrugated aluminum fin mechanically bonded with copper tube
FPI 12
Working pressure (MPa) 1.6
Coil Entering/Leaving
R1-1/2 R1-1/2 R2 R2 R2 R2
water pipe
Condensing water pipe R1-1/4
Copper pipie diameter (mm) 12.7
Type/Material High Efficient Centrifugal Multi-blades Fan/Galavnize Steel
Fan Drive type V-belt
Fan disdcharge orientation Lower horizontal discharge/Top discharge
Power source 380V/3N~/50Hz
Motor type 3-Phase Asynchronous Motor,Class F, no less than IP54
I 0.37(0.37) 0.55(0.55) 0.55(0.75) - - -
Motor
Motor output power II 0.37(0.55) 0.55(0.75) 0.75(1.1) 1.1(1.1) 1.1(1.5) 1.5(2.2)
(kW) III 0.55(0.55) 0.75(0.75) 1.1(1.1) 1.1(1.5) 1.5(1.5) 2.2(2.2)
IV - - - 1.5(1.5) 1.5(2.2) 2.2(2.2)
Type/Material Nylon
Filter
Thickness (mm) 21
Casing Type 25mm Double skin,outer plate material is color coated steel,inner plate material is EG steel
Unit weight 4 Rows 132 155 172 196 215 253
(kg) 6 Rows 142 161 184 203 227 278
Height (mm) 600 650 730 730 800 800
Unit
Width (mm) 900 1050 1080 1250 1320 1680
dimension
Length (mm) 960 1000 1100 1060 1150 1150
Height (mm) 800 850 930 930 1000 1000
Packing
Width (mm) 1150 1300 1330 1500 1570 1930
dimension
Length (mm) 1170 1210 1310 1270 1360 1360
NOTES:
1) THE ABOVE PARAMETERS ARE FOR STANDARD PRODUCTS ONLY.
2) STANDARD RETURN AIR COOLING CONDITIONS: 27ºC DB/19.5ºC WB;
STANDARD FRESH AIR COOLING CONDITIONS: 34ºC DB/28ºC WB;
STANDARD RETURN AIR HEATING CONDITION: 21ºC DB; STANDARD FRESH AIR HEATING CONDITION: 0ºC WB STANDARD
COOLING WATER ENTERING/LEAVING CONDITIONS: 7ºC FOR ENTERING WATER; 12ºC FOR LEAVING WATER;
STANDARD HEATING WATER ENTERING/LEAVING CONDITIONS: 60ºC FOR ENTERING WATER; 50ºC FOR LEAVING WATER;
3) THE UNIT SUPPORTS HIGHER ESP AS REQUIRED BY CUSTOMERS. FOR DESIRED CONFIGURATIONS, PLEASE USE DAIKIN DDW
SELECTION SOFTWARE.
4) WATER INLET/OUTLET NPT CONNECTION IS OPTIONAL.
4
DDW-H (Horizontal)
Model DDW100H DDW120H DDW150H DDW180H DDW200H DDW250H

Nominal Air Flow (m /h) 3
10000 12000 15000 18000 20000 25000
External I - - - - - -
total II 150 150 150 150 150 150
pressure III 220 220 220 220 220 220
(Pa) IV 300 300 300 300 300 300
cooling 4 Rows (Fresh air) 139 166 194 233 266 333
(kW) 6 Rows (Fresh air) 170 204 263 316 346 430
heating 4 Rows (Fresh air) 159 193 242 291 325 404
(kW) 6 Rows (Fresh air) 186 223 283 335 373 467
FPI 12

Coil
Entering/Leaving
R2 R2 R2-1/2 R2-1/2 R2-1/2 R3
water pipe

Fan disdcharge orientation Lower horizontal discharge/Top discharge

Motor I - - - - - -
Motor output power II 2.2(2.2) 2.2(3.0) 3.0(4.0) 4.0(4.0) 4.0(4.0) 5.5(5.5)
(kW) III 2.2(2.2) 3.0(3.0) 4.0(4.0) 4.0(5.5) 4.0(5.5) 5.5(7.5)
IV 2.2(3.0) 3.0(3.0) 4.0(4.0) 5.5(5.5) 5.5(5.5) 7.5(7.5)
Type/Material Nylon
Filter
Thickness (mm) 21
25mm Double skin,outer plate material is color coated steel,inner plate material is
Casing Type
EG steel
Unit weight 4 Rows 313 325 347 444 479 557

(kg) 6 Rows 335 354 415 497 535 600
Height (mm) 930 1050 1180 1240 1240 1430
Unit
Width (mm) 1690 1690 1940 2120 2300 2400
dimension
Length (mm) 1170 1170 1170 1310 1310 1310
Height (mm) 1130 1250 1380 1440 1440 1630
Packing
Width (mm) 1940 1940 2190 2370 2550 2650
dimension
Length (mm) 1380 1380 1380 1520 1520 1520
NOTES:
SELECTION SOFTWARE.
5
DDW-H (Horizontal)
Model DDW300H DDW350H DDW400H DDW450H

Nominal Air Flow (m3/h) 30000 35000 40000 45000
I 300 300 300 300
External total II 400 400 400 400
pressure (Pa) III 500 500 500 500
IV 600 600 600 600
4 Rows (Return air) 178 205 238 266
Nominal cooling 4 Rows (Fresh air) 390 448 520 577
capacity (kW) 6 Rows (Return air) 222 256 296 329
6 Rows (Fresh air) 490 556 639 703
4 Rows (Return air) 295 337 391 437
Nominal heating 4 Rows (Fresh air) 472 534 604 670
capacity (kW) 6 Rows (Return air) 371 398 450 500
6 Rows (Fresh air) 544 629 719 802
FPI 12
R3 R2-1/2 R2-1/2 R2-1/2
water pipe
Copper pipie diameter
12.7
(mm)

Fan disdcharge
Horizontal discharge /Top discharge
orientation
I 7.5(11) 11(11) 11(15) 15(15)
Motor
Motor output II 11(11) 11(15) 15(15) 15(18.5)
power (kW) III 11(11) 15(15) 15(15) 18.5(18.5)
IV 15(15) 15(15) 18.5(18.5) 18.5(18.5)
Type/Material Nylon
Filter
Thickness (mm) 21
Height (mm) 1549 1709 1869 2029
Unit dimension Length (mm) 1646 1646 1806 1806
Width (mm) 2766 2766 2926 2926
Height (mm) 1566 1726 1886 2046
Packing
Width (mm) 1846 1846 2006 2006
dimension
Length (mm) 2966 2966 3126 3126
NOTES:
SELECTION SOFTWARE.
6
DDW-V (Vertical)
Model DDW040V DDW050V DDW060V DDW080V DDW100V DDW120V DDW150V

Nominal Air Flow (m3/h) 4000 5000 6000 8000 10000 12000 15000
External I - - - - - - -
total II 150 150 150 150 150 150 150
pressure III 220 220 220 220 220 220 220
(Pa) IV 300 300 300 300 300 300 300
Nominal 4 Rows (Return air) 23 29 36 49 62 72 90
cooling 4 Rows (Fresh air) 54 69 78 106 135 164 194
capacity 6 Rows (Return air) 31 39 54 61 76 94 118
(kW) 6 Rows (Fresh air) 69 85 102 132 164 202 259
heating 4 Rows (Fresh air) 64 80 96 128 161 193 241
(kW) 6 Rows (Fresh air) 75 93 112 149 187 223 279
FPI 12
Coil
Entering/Leaving
R2 R2 R2 R2 R2 R2 R2-1/2
water pipe
Fan disdcharge orientation Top discharge
I - - - - - - -
Motor
Motor output power II 0.75(1.1) 1.1(1.1) 1.5(1.5) 1.5(2.2) 2.2(2.2) 2.2(3.0) 3.0(4.0)
(kW) III 1.1(1.1) 1.1(1.5) 1.5(2.2) 2.2(2.2) 2.2(2.2) 3.0(3.0) 4.0(4.0)
IV 1.1(1.5) 1.5(1.5) 2.2(2.2) 2.2(2.2) 2.2(3.0) 3.0(3.0) 4.0(5.0)
Type/Material Nylon
Filter
Thickness (mm) 21
Unit weight 4 Rows 199 225 246 274 345 369 432
(kg) 6 Rows 208 237 259 305 367 399 474
Height (mm) 1283 1343 1403 1613 1853 1923 1673
Unit
Length (mm) 980 1140 1210 1320 1390 1530 2090
dimension
Width (mm) 650 650 650 810 900 900 900
Height (mm) 1470 1530 1590 1800 2040 2110 1860
Packing
Width (mm) 860 860 860 1020 1110 1110 1110
dimension
Length (mm) 1160 1320 1390 1500 1570 1710 2270
NOTES:
SELECTION SOFTWARE.
7
DDW-V (Vertical)
Model DDW180V DDW200V DDW250V DDW300V DDW350V DDW400V DDW450V

Nominal Air Flow (m3/h) 18000 20000 25000 30000 35000 40000 45000
External I - - - 300 300 300 300
total II 150 150 150 400 400 400 400
pressure III 220 220 220 500 500 500 500
(Pa) IV 300 300 300 600 600 600 600
cooling 4 Rows (Fresh air) 239 266 342 390 448 520 577
(kW) 6 Rows (Fresh air) 313 347 427 490 556 639 703
heating 4 Rows (Fresh air) 292 325 393 472 534 604 670
(kW) 6 Rows (Fresh air) 336 373 469 544 629 719 802
FPI 12

R2-1/2 R2-1/2 R3 R3 R2-1/2 R2-1/2 R2-1/2
water pipe
Fan disdcharge orientation Top discharge

Motor I - - - 7.5(11) 11(11) 11(15) 15(15)
Motor output power II 4.0(4.0) 4.0(4.0) 5.5(5.5) 11(11) 11(15) 15(15) 15(18.5)
(kW) III 4.0(5.5) 4.0(5.5) 5.5(7.5) 11(11) 15(15) 15(15) 18.5(18.5)
IV 5.5(5.5) 5.5(5.5) 7.5(7.5) 15(15) 15(15) 18.5(18.5) 18.5(18.5)
Type/Material Nylon
Filter
Thickness (mm) 21
Unit weight 4 Rows 485 538 622 - - - -

(kg) 6 Rows 536 595 664 - - - -
Height (mm) 1923 1983 2043 2555 2715 3035 3195
Unit
Length (mm) 2240 2320 2670 2766 2766 2926 2926
dimension
Width (mm) 900 900 900 1006 1006 1166 1166
Height (mm) 2110 2170 2230 2572 2732 3052 3212
Packing
Width (mm) 1110 1110 1110 1206 1206 1366 1366
dimension
Length (mm) 2420 2500 2850 2966 2966 3126 3126
NOTES:
SELECTION SOFTWARE.
5) MODEL DDW040~250V ARE WITHOUT FRAME; DDW300~450V ARE WITH FRAME TYPE.
8
External static presure check list
DDW-H
Unit model DDW020H DDW030H DDW040H DDW050H DDW060H DDW080H DDW100H DDW120H DDW150H DDW180H DDW200H
Nominal air flow (m3/h) 2000 3000 4000 5000 6000 8000 10000 12000 15000 18000 20000
I 80 80 80 - - - - - - - -
II 150 150 150 150 150 150 150 150 150 150 150
ETP (Pa)
III 220 220 220 220 220 220 220 220 220 220 220
IV - - - 300 300 300 300 300 300 300 300
I 50 34 39 - - - - - - - -
II 120 104 109 86 104 68 99 77 35 61 85
ESP (Pa)
III 190 174 179 156 174 138 169 147 105 131 155
IV - - - 236 254 218 249 227 185 211 235
DDW-V
Unit model DDW040V DDW050V DDW060V DDW080V DDW100V DDW120V DDW150V DDW180V DDW200V
Norminal air flow (m3/h) 4000 5000 6000 8000 10000 12000 15000 18000 20000
I - - - - - - - - -
II 150 150 150 150 150 150 150 150 150
ETP (Pa)
III 220 220 220 220 220 220 220 220 220
IV 300 300 300 300 300 300 300 300 300
I - - - - - - - - -
II 69 86 58 68 85 56 78 61 85
ESP (Pa)
III 139 156 128 138 155 126 148 131 155
IV 219 236 208 218 235 206 228 211 235
DDW-H/V
Unit model DDW250H DDW300H DDW350H DDW400H DDW450H DDW250V DDW300V DDW350V DDW400V DDW450V
Norminal air flow (m3/h) 25000 30000 35000 40000 45000 25000 30000 35000 40000 45000
I - 300 300 300 300 - 300 300 300 300
II 150 400 400 400 400 150 400 400 400 400
ETP (Pa)
III 220 500 500 500 500 220 500 500 500 500
IV 300 600 600 600 600 300 600 600 600 600
I - 201 165 188 159 - 201 165 188 159
II 48 301 265 288 259 48 301 265 288 259
ESP (Pa)
III 118 401 365 388 359 118 401 365 388 359
IV 198 501 465 488 459 198 501 465 488 459
NOTES:
THE DATA IS FOR STANDARD UNIT.ESP VALUE IS BASED ON ETP VALUE.FOR EXAMPLE,THE ESP VALUE IS 50PA WHEN ETP IS 80PA
FOR DDW020H UNIT.
9
DDW-H (Horizontal)
Hanging holes 4- 15
Manual air vent

Chilled leaving water pipe D
Chilled entering
water pipe D
Condensation water
drain pipe C
DDW-H Horizontal Discharge
Hanging holes 4- 15
Chilled leaving
water pipe D
Chilled entering
water pipe D
Condensation
water drain pipe C
DDW-H Top Discharge
Unit: mm
Chilled
Connection pipe Condensation
Dimension Width Length Height Return air Supply air Hanging holes entering
dimension water drain pipe
water pipe
MODEL W L H F G A B K M N J S E P Q R D C
DDW020H 900 960 600 810 460 298 262 1080 1020 910 150 201 191 85 158 276 R 1-1/2 R 1-1/4
DDW030H 1050 1000 650 960 510 331 289 1230 1170 950 150 207 280 85 158 339 R 1-1/2 R 1-1/4
DDW040H 1080 1100 730 990 590 395 341 1260 1200 1050 150 177 234 85 164 454 R2 R 1-1/4
DDW050H 1250 1060 730 1160 625 395 341 1430 1370 1010 150 216 317 85 164 454 R2 R 1-1/4
DDW060H 1320 1150 800 1230 660 471 404 1500 1440 1100 150 243 324 85 164 518 R2 R 1-1/4
DDW080H 1680 1150 800 1590 660 471 404 1860 1800 1100 150 243 529 85 164 518 R2 R 1-1/4
10
DDW-H (Horizontal)
F
N
L
Hanging holes 4- 15
28.5
E A T A
40
W
M
K
Manual air vent
90 Chilled leaving water pipe D
G
R
H
Chilled entering water pipe D
Condensation water drain pipe C
B
Q
J
95
P
50
F
N
L
Hanging holes 4- 15
28.5
W
M
K

B S E A T A
40
90
R
H
G

Q
95
50
P
DDW-H Top Discharge
Unit: mm
Chilled Condensation
Connection pipe entering
Dimension Width Length Height Return air Supply air Hanging holes water drain
dimension water
pipe pipe
MODEL W L H F G A B K M N J S E P Q R D C
DDW100H 1690 1170 930 1600 790 373 404 1870 1810 1120 150 194 102 85 164 645 R2 R 1-1/4
DDW120H 1690 1170 1050 1600 910 373 404 1870 1810 1120 150 194 102 85 164 772 R2 R 1-1/4
DDW150H 1940 1170 1180 1850 1040 373 404 2120 2060 1120 150 194 237 85 172 883 R 2-1/2 R 1-1/4
DDW180H 2120 1310 1240 2030 1100 430 478 2300 2240 1260 150 295 197 85 172 946 R 2-1/2 R 1-1/4
DDW200H 2300 1310 1240 2210 1100 557 478 2480 2420 1260 165 295 135 85 172 946 R 2-1/2 R 1-1/4
DDW250H 2400 1310 1430 2310 1290 557 478 2580 2520 1260 165 295 107 85 178 1124 R3 R 1-1/4
11
DDW-H (Horizontal)
F
L
A T A
40
W
Manual air vent
90
Chilled entering
water pipe D
Chilled leaving
water pipe D
G
H
Chilled entering
water pipe D
B

P
125
63
F
L
Unit: mm
W
Manual air vent
90 B S E A T A Connection Chilled
40
Supply Condensation
Dimension Width Length Height Return air Hanging holes pipe entering
Chilled water
entering
air drain pipe
dimension waterwater
pipe pipe D
MODEL W L H F G A B E T J S P DChilled entering
C
DDW300H 2766 1646 1549 2670 1390 569 569 273 450 352 200 98 water pipe R
R3 D 1-1/4
DDW350H 2766 1646 1709 2670 1550 569 569 284 450 352 203 98 R 2-1/2 R 1-1/4
Chilled leaving
water pipe D
G
DDW400H 2926 1806 1869 2830 1710 638 638 266 500 352 213 98 R 2-1/2 R 1-1/4
DDW450H 2926 1806 2029 2830 1870 638 638 266 500 352 213 98 Chilled entering
R 2-1/2 R 1-1/4
water pipe D
P
125
63
DDW-H Top Discharge
12
DDW-V (Vertical)
B S E A
40
Manual air vent

Chilled leaving
water pipe D
H
G
Chilled entering
water pipe D
63
Condensation
water drain pipe C
N M
90 L W
DDW-V Top Discharge
Unit: mm
Chilled
Condensation
dimension water
pipe
pipe
MODEL W L H F G A B M N S E P Q R D C
DDW040V 980 650 1283 890 655 331 289 960 630 71 444 85 164 518 R2 R 1-1/4
DDW050V 1140 650 1343 1050 687 395 341 1120 630 84 480 85 164 518 R2 R 1-1/4
DDW060V 1210 650 1403 1120 740 395 341 1190 630 84 480 85 164 581 R2 R 1-1/4
DDW080V 1320 810 1613 1230 842 471 404 1300 790 98 517 85 164 708 R2 R 1-1/4
DDW100V 1390 900 1853 1300 1014 557 478 1370 880 98 574 85 164 835 R2 R 1-1/4
DDW120V 1530 900 1923 1440 1070 557 478 1510 880 102 639 85 164 899 R2 R 1-1/4
13
DDW-V (Vertical)
A T A E
B S
40
20
Chilled leaving
water pipe D
H
R
G

Q
63
N M
90 L W
DDW-V Top Discharge
Unit: mm
Chilled
Condensation
dimension water
pipe
pipe
MODEL W L H F G A B M N S E P Q R D C
DDW150V 2090 900 1673 2000 923 471 404 2070 880 144 167 85 172 756 R 2-1/2 R 1-1/4
DDW180V 2240 900 1923 2150 1035 430 478 2220 880 100 440 85 172 883 R 2-1/2 R 1-1/4
DDW200V 2320 900 1983 2230 1109 557 478 2300 880 98 156 85 172 946 R 2-1/2 R 1-1/4
DDW250V 2670 900 2043 2580 1155 557 478 2650 880 100 156 85 178 997 R3 R 1-1/4
14
DDW-V (Vertical)
40
S B E A T A
Chilled leaving
water pipe D
40
Chilled entering
water pipe D
Chilled leaving
H
water pipe D
Chilled entering
G
water pipe D
63
L M Condensation
P
water drain pipe C

63
DDW-V Top Discharge
MDW-V Top Discharge Unit: mm
Connection Chilled Condensation

Dimension Width Length Height Return air Supply air Hanging holes pipe entering water water drain
dimension pipe pipe
MODEL W L H F G A B E T S P D C
DDW300V 2766 1006 2555 2670 1390 569 569 284 450 305 98 R3 R 1-1/4
DDW350V 2766 1006 2715 2670 1550 569 569 273 450 305 98 R 2-1/2 R 1-1/4
DDW400V 2926 1166 3035 2830 1710 638 638 276 500 357 98 R 2-1/2 R 1-1/4
DDW450V 2926 1166 3195 2830 1870 638 638 267 500 357 98 R 2-1/2 R 1-1/4
15
Fan Discharge Type

Horizontal Air Discharge For DDW-H Top Air Discharge For DDW-H
Horizontal Type Horizontal Type
Horizontal air discharge of DDW-H fans Top air discharge for DDW-H fans
Top Air Discharge For DDW-V Vertical

Type
Top
Topair
airdischarge
dischargeofofDDW-V
MDW-Vfans
fans
16
Selection Software
DAIKIN Smart Tools provide customers with more convenient and reliable services
Professional model selection software for air handling units
Convenient graphical user interface
Providing most economic and reasonable combination solutions
Provide different configuration options according to the requirements of the customer
Output the performance table of the unit according to the customer’s requirements
Figuring out the component list and automatically calculate the price of the entire unit
Output units arrangement drawing, development drawing and technical specifications
17
Special Notes
Facing air discharge, if the chilled water inlet/outlet is on your left, the unit is L connection. Otherwise,
the unit is R connection.
For vertical type unit,refer to the below chart to judge the connection.
Please provide unit model, quantity and operating condition when purchasing. Please contact us if any
other specifications required.
Right connection
Entering air Leaving air
Left connection
Figure 1 (Horizontal unit)
Right connection
Entering air
Left connection
Figure 2 (Vertical unit)
18
Wiring Diagrams
Motor power input < 11kW Motor power input ≥ 11kW
U V W U1 V1 W1 U2 V2 W2
M M
~ ~
NOTE:
TO CONNECT ELECTRIC CONTROL DEVICES, PLEASE USE OVER-CURRENT, SHORT CIRCUIT AND OVERHEAT
PROTECTORS.
19
Installation
Installing DDW
Important Notice
Installation and maintenance are to be performed only by technicians who are familiar with local rules and
regulations, and experienced with this type of equipment.
Make sure that the rated voltage of the power supply conforms to the voltage stated on the unit nameplate.
Cut off all power supplies before mounting or maintaining the unit.
Electric connections must conform to local laws and regulations.
The voltage should fluctuate within the range of ± 10% of the rated voltage.
The unit must be well earthed to prevent insulation failures.
All the wires must be securely connected.
The design of water pipes and ducts must conform to the Specifications of Heating, Ventilation and Air
Conditioning (GBJ19-87).
DDW Mounting Location

Make sure it is convenient to connect wires and pipes in the selected mounting location. The minimum space
reserved around DDW horizontal units is shown in Figure 1; DDW vertical units are shown in Figure 2.
Unit: mm
50
0
50 0
0 50
0
50
00
10
10
00
Figure 1 Figure 2
20
Suspending Installation
During the installation, please handle the unit or packing case with care, to avoid damage to any part. Before
leaving the factory, the unit or its packing case already has forklift handling holes or hoisting holes. During the
hoisting, the lifting poles should be strong enough to bear the unit weight. Please handle the DDW unit as shown
in Figure 3.
4
4
3
2
3
2
1
Figure 3
Storage
When a unit is placed protect it from dirt, rain, snow and even animals. Be sure not to damage the protective film
on its surface.
Base Setup
Adjust the base levelness
The base, if not put on a level surface, may result in water leakage or break the dynamic balance of the fan due to
poor drainage of condensing water or cause the bearing to fail or vibrate.
The base height should match the U-shaped pipe blend. The drain pipe should be connected with the Ushaped
water seal, as shown in Figure 4.
Need suitable water seal when installing in order to condensation water drain smoothly.
Drain pipe
H
P = Negative pressure value (Pa) inside the unit

H ≥P/10+20(mm)
NOT MORE THAN 1/2H
Drain bend
Figure 4
21
Servicing And Maintenance

Notices
Responsibilities And Obligations
This product comes to you with the DAIKIN service warranty. Only DAIKIN technicians or experienced technicians
authorized by DAIKIN are allowed to install, test or maintain these products.
Using The Unit

After installing the piping system, please first wash the pipes. To do so, be sure to shut off the valve connected to
the unit, to prevent unwanted things in the pipes from entering the coils or blocking the loop.
After the installation, please check there is anything unwanted inside the fan. Turn the blades by hand. If no
unusual noise is heard, turn on the fan, to see if it is running properly.
Before turning on the water flow, please open the exhaust valve to let the air out of the pipe till water flows out from
the pipe.
When the unit stops running, fill the coil with water or otherwise keep the pipe from erosion.
When the environment temperature falls below 0°C in the winter, drain the pipe to prevent it from freezing.
Clean the coils at regular intervals, to remove the dust from the coils. Clean the scale inside the coils every 2 or 3
years. If possible, use soft water to supply hot/cold water to the coils.
Check the unit filter for dust regularly; if possible, please use a pressure difference detector. Once the resistance
reaches the limit, wash or replace the filter media in time.
After the unit runs for a week, please readjust the V-belt. Afterwards, check the belt every three months.
Servicing And Maintenance

A sound maintenance schedule helps reduce operational failures.
A dirty filter may worsen the performance and air flow of the unit. Thus, replace or wash the filter in time. Be sure
to check the filter every month to see if it is clean enough.
Wash the coils with compressed air or water. Brush the coil surface gently with a soft brush or use a vacuum
cleaner to clean the dust.
Do the following on a regular basis:
Clean up the fans every 6 months, to keep them in good balance.
Check and clean the water coils. Check the drain pipe in case dust or unwanted things block the pipes.
Check if the bearing comes loose. If so, fix the fastening screw tightly to the bearing.
Clean the dirt in the coils at regular intervals.
Check that the side front of the fan V-belt is flush with the side front of the motor V-belt, to make sure the pulleys
are placed on a flat plane. Usually, check using the four-point method (see Figure 5).
Use V-belts of the same brand and model. Never mix old V-belts with new ones. Make sure that the V-belts
match the pulley grooves.
Use a tensiometer to check the V-belts, and tighten them properly (see Figure 6).
22
Check and adjust the levelness of the V-belt using the four-point method, as shown in Figure 5.
Ruler
A B C D
Figure 5
Check the tightness of the V-belt, as shown in Figure 6.

C
sp ente
ac r to
ing c
ente
r The belt tension indicator acts on the
midpoint of center-to-center spacing
Torture 16mm
every meter
Figure 6
23
Common Failures
DDW
Common
Locations Possible Causes Solutions
Failures
Blower out off center Contact the seller
Loose bearings due to large gap Contact the seller
Blower is loose Contact the seller
1. Blower Loose connection between bearings Contact the seller
Blower is damaged Contact the seller
The fan fastening screw is loose Fasten the screw
There are unwanted things inside fans. Remove unwanted things
Belt pulley is not fastened on the axis. Fasten the V-shaped belt
V-shaped belt is loose. Adjust after it runs for 48 hours for the
Adjust the V-shaped belt
first time.
V-shaped belt is too tight Adjust the V-shaped belt
The V-shaped belt model is not right Replace the V-shaped belt
2. Drive Replace V-shaped belts with those of the
V belts are of different length
same length
The V-shaped belt pulley of the fan does not align with that of
Align the belt pulleys
the motor
V-shaped belt is damaged Replace the V-shaped belt
The screw fixing the motor to the motor base is loose Fasten the screw
Bearing failure Replace bearings
Lack of lubricant oil Add lubricant oil
The bearing housing is loose Fasten the bearing housing
3. Bearing The bearing is not mounted flush Re-mount the bearing
There are unwanted things inside bearings Remove unwanted things
Bearings are damaged Replace bearings
Abnormal
sound Bearings are rusty De-rust or replace bearings
There are unwanted things inside houses Remove the unwanted things
4. Fan house House is loose Contact the seller
Air intake house is damaged Contact the seller
Incoming line is loose Fasten the incoming line
5. Electric appliances Motor gives AC hum Contact the seller.
Phase lack Supply 3-phase power
Bent or distorted Replace axis
6. Axis Balance weight is loose Fasten the balance weight
Axis is loose Fasten axis
Duct is too small Re-design the duct
7. Air speed is too high Change the V-shaped belt pulley to reduce
Static pressure has not reached the set static pressure value
the fan speed
The duct is too small Re-design the duct
8. Periodical vibration System is unstable Adjust the system
Duct vibrates as the fan pulsates Adjust the fan speed
9. Noise caused by hi-
speed wind passing Duct leaks Seal it with glue
the aperture & holes
Duct turns too sharply Re-design the duct
Duct expands sharply Re-design the duct
10. When blocked,
the high-speed air Duct shrinks sharply Re-design the duct
rattles or howls
Air speed is too high inside the duct Re-design the duct
Damping connector is too tight Re-adjust the damping connector
24
Common
Locations Possible causes Solutions
failures
Blower is mounted incorrectly Contact the seller
1. Fan
Fan rotates in the opposite direction Regulate the power phase sequence
Actual resistance in the duct exceeds set resistance. Re-design the system
2. Duct system Duct is poorly sealed Seal with glue
Fireproof valve is shut off Shut on the fireproof valve
3. Filter Too dirty or even blocked Clean or replace filter
The fan is 4. Coil Too dirty or even blocked Clean coil
functioning
The air inlet and the air outlet are not properly isolated. Thus,
but the air 5. Blocked air supply Add air deflector
the air runs directly to the air inlet through the separator
supply is
Elbow at the return air inlet and fan outlet are too close to the
insufficient 6. Fan air inlet is Move the fan
unit wallboard
blocked
The fan outlet is blocked Remove the obstructions
A length of straight tube is mounted at the fan outlet during
7. No collimator tube at fan testing. Without straight tube, the fan performance might
Mount collimator tube
the fan outlet be worsened. Thus, the fan may run faster to offset the
resistance. (Check the fan speed)
8. There’re unwanted The fan outlet is blocked Remove the obstructions
things inside fan
system There is an elbow at the fan outlet Re-design duct
Improper duct size Remove the obstructions
The access door is open Close the access door
The fan is
functioning 1. System The system is not well balanced and the actual resistance is
Re-design the system
but the air lower than the set resistance
supply is No air valve or air valve blade Mount wind valve or wind valve blower
too large
Filter falls off Re-mount the filter
2. Duct Return duct leaks Seal it with glue
25
Warning ● Daikin Industries, Ltd.’s products are manufactured for export to numerous countries throughout the
world. Daikin Industries, Ltd. does not have control over which products are exported to and used in
a particular country. Prior to purchase, please therefore confirm with your local authorized importer,
distributor and/or retailer whether this product conforms to the applicable standards, and is suitable
for use, in the region where the product will be used. This statement does not purport to exclude,
restrict or modify the application of any local legislation.
● Ask a qualified installer or contractor to install this product. Do not try to install the product yourself.
Improper installation can result in water or refrigerant leakage, electrical shock, fire or explosion.
● Use only those parts and accessories supplied or specified by Daikin. Ask a qualified installer or
contractor to install those parts and accessories. Use of unauthorized parts and accessories or
improper installation of parts and accessories can result in water or refrigerant leakage, electrical
shock, fire or explosion.
● Read the User’s Manual carefully before using this product. The User’s Manual provides important
safety instructions and warnings. Be sure to follow these instructions and warnings.
If you have any enquiries, please contact your local importer, distributor and/or retailer.
The air conditioners manufactured The airconditioning factories of

by Daikin Industries have received Daikin Industries have received
ISO 9001 series certification for environmental management system
quality assurance. standard ISO 14001 certification.
Certificate Number. 9601019 Certificate Number. EMS80362
Cautions on product corrosion

1. The units should not be installed in areas where corrosive gases, such as acid gas or alkaline gas, are produced.
2. If the unit is to be installed close to the sea shore, direct exposure to the sea breeze should be avoided. If you need to install the
unit close to the sea shore, contact your local distributor.
Dealer
Head Office:
Umeda Center Bldg., 2-4-12, Nakazaki-Nishi,
Kita-ku, Osaka, 530-8323 Japan
Tokyo Office:
JR Shinagawa East Bldg., 2-18-1, Konan,
Minato-ku, Tokyo, 108-0075 Japan
http://www.daikin.com/global_ac/
© All rights reserved
Printed with soy ink.
Literature No.: ED-DDW-201401B

Supersedes: ED-DDW-201311B

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Engineer Data ED-DDW-201401B

DAIKIN DDW Air Handling Units

Literature No.: ED-DDW-201401B

Fan Discharge Type............................................................................................................ 16

Servicing And Maintenance .............................................................................................. 22

DDW - Double-Skin AHU

Without Frame Type

Model DDW020H DDW030H DDW040H DDW050H DDW060H DDW080H

Model DDW100H DDW120H DDW150H DDW180H DDW200H DDW250H

Working pressure (MPa) 1.6

Copper pipie diameter (mm) 12.7

Fan Drive type V-belt

Fan disdcharge orientation Lower horizontal discharge/Top discharge

Power source 380V/3N~/50Hz

Motor type 3-Phase Asynchronous Motor,Class F, no less than IP54

Unit weight 4 Rows 313 325 347 444 479 557

Model DDW300H DDW350H DDW400H DDW450H

Fan Drive type V-belt

Model DDW040V DDW050V DDW060V DDW080V DDW100V DDW120V DDW150V

Model DDW180V DDW200V DDW250V DDW300V DDW350V DDW400V DDW450V

Working pressure (MPa) 1.6

Copper pipie diameter (mm) 12.7

Type/Material High Efficient Centrifugal Multi-blades Fan/Galavnize Steel

Fan Drive type V-belt

Fan disdcharge orientation Top discharge

Power source 380V/3N~/50Hz

Motor type 3-Phase Asynchronous Motor,Class F, no less than IP54

Unit weight 4 Rows 485 538 622 - - - -

External static presure check list

Manual air vent

DDW-H Horizontal Discharge

DDW-H Top Discharge

Chilled leaving water pipe D

Chilled entering water pipe D

DDW-H Top Discharge

Condensation water drain pipe C

DDW-H Horizontal Discharge

DDW-H Top Discharge

Manual air vent

DDW-V Top Discharge

Chilled entering water pipe D

Condensation water drain pipe C

DDW-V Top Discharge

water drain pipe C

DDW-V Top Discharge

MDW-V Top Discharge Unit: mm

Connection Chilled Condensation

Fan Discharge Type

Top Air Discharge For DDW-V Vertical

Entering air Leaving air

Figure 1 (Horizontal unit)

Figure 2 (Vertical unit)

Motor power input < 11kW Motor power input ≥ 11kW

DDW Mounting Location

P = Negative pressure value (Pa) inside the unit

Servicing And Maintenance

Using The Unit

Servicing And Maintenance

Check the tightness of the V-belt, as shown in Figure 6.