air cooled liquid chillers air cooled liquid chillers

AIR COOLED LIQUID CHILLERS
WCHAXT/Y-B SERIES (64 - 313TON)

INDEX
Pag.
General description
Versions
Technical features
Factory fitted accessories
Loose accessories
Reference conditions
Operating range
Technical data
Cooling capacity
Heating capacity
Water circuit pressure drops
Evaporator water flow limits
Correction factors
Evaporator fouling factors
corrections
Refrigeration circuit diagram:
Only cooling units
Heat pump units
Units with pump:
Technical data
Characteristic pump curves
Dimensions and clearances
Position of water connections
Water circuit:
General characteristics
Water circuit diagram
Weights
Sound pressure level
Microprocessor control system
Wiring diagrams
explanation
Wiring diagrams
Installation recommendations

GENERAL DESCRIPTION
Air cooled water chiller units, with axial fans for outdoor installation.
The range consists of 10 models covering a cooling capacity from 225
to 1102 kW (to 64 TON to 313 TON).
The units feature two independent circuits on both refrigerant and air
side, allowing to perform maintenance activities in total safety without
stopping the unit.
VERSIONS:
WCHAXT/Y
WCHAXT/Y/WP
- cooling only
- reversible heat pump
TECHNICAL FEATURES:
Frame. Self-supporting galvanized steel frame further protected with
polyester powder painting. Easy to remove panels allow access to the
inside of the unit for maintenance and other necessary operations.
Compressors. Screw semihermetic with built-in oil separator, suction
filter, cranckcase heater, oil sight glass, thermal protection and hot gas
shut off valves.
Fans. Axial fans directly coupled to a three-phase electric motor with
external rotor. A safety fan guard is fitted on the air flow discharge.
Condenser.
Two copper tube and aluminum finned coils.
Evaporator. r.
Shell and tube, with two indipendent refrigerant circuits
and one water circuit.
Electrical board. Includes: main switch with door safety interlock; fuses,
overloadprotectionforcompressorsandthermocontactsforfans;interface
relays and electrical terminals for external connections.
Microprocessor for automatic control of the unit allowing continuous
display of the operational status of the unit, control set and real water
temperature and, in case of partial or total block of the unit, indication of
security device that intervened.
Electronic proportional device to decrease the sound level, with a
continuous regulation of the fan speed. This device allows also the cooling
functioning of the unit by external temperature till 0°C.
Refrigerant circuit versions WCHAXT/Y.
Each unit includes two independent refrigerant circuits. Produced in
copper tubing, all models have the following components: electronic
expansion valve, economizer (except 1202-B and 2002-B models),
filter-drier, level and humidity indicator, pressure transducer, high and
low pressure switches (with fixed setting) and safety valve.
FACTO
RY FITTED ACCESSORIES:
IM - Magnetothermic switches instead of fuses and thermal relays.
RZ - Stepless regulation of the compressors to adjust the cooling
capacity to the termic load of the system.
CC - Pressostatic condensation control obtained by means of
continuous adjustment of the fan rotation speed.
BT - Low te
mpera
ture
ki
t,
required in case the unit will work with
evaporatorʼs outlet water temperature below 5°C.
HR - Desuperheater with 20% heat recovery.
HRT/S - Total heat recovery serial connected for from 70% to 95%
heat recovery, according to the working conditions.
HR
T/P - Desuperheater with 100% heat recovery.
TX - Epoxy treated condensing coil fins.
PU - Circulating pump inserted inside the unit.
PD - Double circulating pump installed in the unit, working one in
stand-by to the other; by every start request, the pump with the least
number of working hours is activated first.
RF - Cooling circuit shut off valves on liquid.
FE
- Evaporator heater with thermostatic control.
SS - Soft start to reduce compressor starting current.
WM - Web
Monitoring: monitoring enables remote management of
the system through communication protocols, GPRS/GSM/TCP-IP.
Authorized users have access to a dashboard display that provides
critical system information from which the user can measure, manage
and report as necessary.
CP - Potential free contacts for remote alarm and control.
LOOSE ACCESSORIES:
MN- High and low pressure gauges for every refrigeration circuit.
CR - Remotecontrolpaneltobe inserted in theroom forremote control
of the unit, with the same functions as that inserted in the machine.
IS - RS 485 serial interface for connection to controls and centralized
supervision systems.
RP - Coil protection guards in steel with cataphoresis treatment and
painting.
AG - Rubber vibration dampers to be inserted at the bottom of the
unit to dampen possible vibrations due to the type of floor where the
machine is installed.
AM - Spring shock absorbers to be inserted at the bottom of the
unit to dampen possible vibrations due to the type of floor where the
machine is installed.
FL - Flow switch
is installed.
to prevnt any water flow interruption.
Refrigerant circuit versions WCHAXT/Y/WP.
The unit in heat pump version, in addition to the components of the only
cooling unit, includes for each circuit: 4-ways reverse valve, liquid separaa-
tor on the suction line, liquid receiver, check valves, pressure valve on
compressor supply and liquid line shut-off valve.
Water circuit.
Includes: evaporator, temperature sensor, antifreeze sensor and water
drain.

REFERENCE CONDITIONS
All technical data, indicated on pages 5 e 6, refer to the following unit
operating conditions:
- cooling:
• entering water temperature 12°C
• leaving water temperature 7°C
• ambient air on condenser 46°C.
- heating:
• entering water temperature 40°C
• leaving water temperature 45°C
• ambient inlet air 7°C d.b., 6°C w.b.
- sound pressure level (DIN 45635):
measured in the free field conditions at 1m from the unit and at 1,5m
from the ground. According to DIN 45635.
- sound pressure level (ISO 3744):
measured in free field conditions at 1m. As defined by ISO 3744.
The power supply is 400V/
3Ph/50Hz; auxiliary supply is 230V/
1Ph/
50Hz.
OPERA
TING RANGE
Inlet water temperature
Outlet water temperature
Water thermal difference (1)
Ambient air temperature
Minimun chilled water outlet
temperature with glycol mixture
Max. operating pressure heat
exchanger water side
Cooling
Heating
°C 8 20 25 45
°C 5* 15 30 50
°C 3 9 3 10
°C 0** 52 -5 20
°C -8* -----
kPa
ft WG
1000
333
* Low temperature kit, required in case the unit will work with
evaporatorʼs outlet water temperature below 5°C.
** This value can be reduced until -20°C with an optional accessory
supplied prefabricated (CC).
(1) In all cases the water range will have to re-enter within the reported
limits on pag. 9.

TECHNICAL DAT
ATA
A
MODEL
Cooling:
Cooling Capacity (1)
Absorbed power (1)
Cooling Capacity (2)
Absorbed power (2)
Heating:
Heating capacity (1)
Absorbed power (1)
Compressors:
Quantity
Refrigerant Circuits
Capacity steps
Evaporator:
Pressure drops (1)
Pressure drops (2)
Water connections
Water volume
Compressor:
Unitary absorbed power (1)
Unitary absorbed current (1)
Unitary absorbed power (2)
Unitary absorbed current (2)
Oil charge
Standard version:
Fans
Nominal power - fans
Nominal current - fans
Sound pressure level DIN (1)
Sound pressure level ISO (1)
Refrigerant charge R134a
cooling only
Refrigerant charge R134a
heat pump
Lenght
Width
Height
Transport weight cooling only
Transport weight heat pump units
Total electrical consumption:
Power supply
Max. Current
Starting current
kW 193 237 286 339 391
TON 54,9 67,4 81,3 96,4 111
kW 100 112 134 161 179
kW 225 275 329 390 453
TON 64,0 78,2 93,5 111 129
kW 85 96 114 137 152
kW 229 268 317 380 448
TON 65,1 76,2 90,1 108 127
kW 79 84 93 106 117
n° 2 2 2 2 2
n° 2 2 2 2 2
n° 6 6 6 6 6
l/s 9,22 11,32 13,66 16,20 18,68
gpm 146,1 179,4 216,5 256,8 296,1
kPa 41 38 49 50 53
ft WG 13,7 12,7 16,3 16,7 17,7
l/s 10,75 13,14 15,72 18,63 21,64
gpm 170,4 208,3 249,2 295,3 343,0
kPa 56 51 65 66 71
ft WG 18,6 17,1 21,6 22,1 23,8
DN 100 125 125 125 125
l 35 35 35 35 35
gal 9,2 9,2 9,2 9,2 9,2
kW 46,0 52,0 63,0 74,5 83,5
A 72 72 88 97 111
kW 38,6 43,8 51,0 62,5 70,0
A 62 62 77 82 100
Kg 10 10 10 10 10
m³/s 20,6 23,8 31,2 31,2 33,4
cfm 43631 50409 66082 66082 70741
n° 4 4 6 6 6
kW 8,0 8,0 12,0 12,0 12,0
A 17 17 17 26 26
dB(A) 79 80 80 80 81
dB(A) 68 68 68 68 68
Kg 42 52 56 64 84
Kg 44 55 59 67 88
mm 2800 2800 4000 4000 5000
mm 2200 2200 2200 2200 2200
mm 2500 2500 2500 2500 2500
kg 2670 2800 3150 3300 3740
kg 3110 3250 3610 3780 4340
V/Ph/Hz
A 169 169 203 230 260
A 244 244 261 320 335
(1) Referential conditions at page 4.
(2) Chilled water from 12 to 7°C, air condenser 35 °C

TECHNICAL DAT
ATA
A
MODEL
Cooling:
Cooling Capacity (1)
Absorbed power (1)
Cooling Capacity (2)
Absorbed power (2)
Heating:
Heating capacity (1)
Absorbed power (1)
Compressors:
Quantity
Refrigerant Circuits
Capacity steps
Evaporator:
Pressure drops (1)
Pressure drops (2)
Water connections
Water volume
Compressor:
Unitary absorbed power (1)
Unitary absorbed current (1)
Unitary absorbed power (2)
Unitary absorbed current (2)
Oil charge
Standard version:
Fans
Nominal power - fans
Nominal current - fans
Sound pressure level DIN (1)
Sound pressure level ISO (1)
Refrigerant charge R134a
cooling only
Refrigerant charge R134a
heat pump
Lenght
Width
Height
Transport weight cooling only
Transport weight heat pump units
Total electrical consumption:
Power supply
Max. Current
Starting current
kW
TON
kW
kW
TON
kW
kW
TON
kW
n°
n°
n°
l/s
gpm
kPa
ft WG
l/s
gpm
kPa
ft WG
DN
l
gal
kW
A
kW
A
Kg
m³/s
cfm
n°
kW
A
dB(A)
dB(A)
Kg
Kg
mm
mm
mm
kg
kg
V/Ph/Hz
A
A
452 540 671 797 952
129 154 191 227 271
206 249 306 366 431
517 618 765 910 1092
147 176 217 259 310
175 210 260 304 358
529 610 756 883 982
150 173 215 251 279
141 167 209 243 281
2 2 2 2 2
2 2 2 2 2
6 6 6 6 6
21,60 25,80 32,06 38,08 45,48
342,4 408,9 508,2 603,6 720,9
43 56 64 65 58
14,3 18,7 21,3 21,7 19,3
24,7 29,5 36,5 43,4 52,1
391,5 468,1 579,3 689,2 826,9
56 73 83 91 91
18,7 24,5 27,7 30,4 30,3
150 150 150 150 150
80 80 80 80 80
21,1 21,1 21,1 21,1 21,1
97,0 114,5 143,0 172,0 203,0
136 163 203 233 248
79,5 97,0 119,0 139,5 166,5
119 141 180 195 219
18 18 20 20 20
40,5 46,6 58,3 70,0 76,3
85779 98699 123480 148260 161604
8 8 12 14 14
16,0 16,0 22,0 25,0 25,0
40 40 48 56 56
81 82 83 84 84
69 70 70 70 70
84 106 120 210 240
88 111 126 221 252
5000 5000 7200 8400 8400
2200 2200 2200 2200 2200
2500 2500 2500 2500 2500
4150 4300 5600 6530 7100
4890 4950 6370 7270 7910
312 386 470 537 578
454 497 618 773 908
(1) Referential conditions at page 4.
(2) Chilled water from 12 to 7°C, air condenser 35 °C

COOLING CAPACITY
To
(°C)
AMBIENT AIR TEMPERA
TURE °C
30 40 49 52
kWf TONf kWe
kWf TONf kWe
kWf TONf kWe
kWf TONf kWe
kWf TONf kWe
kWf TONf kWe
5 224 63,7 77,1 211 60,0 83,2 197 56,0 89,7 179 50,9 98,3 171 48,6 103 161 45,8 107
6 231 65,7 78,1 218 62,0 84,2 203 57,7 90,8 186 52,9 99,1 175 49,8 104 168 47,8 108
238 67,7 79,2 211 60,0 91,8 183 52,0 104 174 49,5 109
8 246 69,9 80,3 232 66,0 86,3 217 61,7 92,7 199 56,6 101 190 54,0 105 181 51,5 109
9 254 72,2 81,4 239 68,0 87,5 225 64,0 93,5 206 58,6 101 197 56,0 106 187 53,2 110
10 262 74,5 82,5 247 70,2 88,3 233 66,3 94,5 213 60,6 102 204 58,0 106 194 55,2 110
5 272 77,3 86,3 256 72,8 93,2 241 68,5 101 221 62,8 110 210 59,7 115 199 56,6 120
6 281 79,9 87,3 266 75,6 94,1 249 70,8 102 229 65,1 111 218 62,0 116 207 58,9 121
290 82,5 88,9 258 73,4 103 226 64,3 117 196 55,7 106
8 300 85,3 89,9 283 80,5 98,1 267 75,9 104 246 69,9 113 234 66,5 118 203 57,7 107
9 309 87,9 91,5 293 83,3 98,1 275 78,2 105 254 72,2 114 243 69,1 118 211 60,0 108
10 319 90,7 92,5 302 85,9 99,2 286 81,3 106 263 74,8 115 251 71,4 119 219 62,3 108
5 325 92,4 103 301 85,6 111 289 82,2 120 266 75,6 131 254 72,2 138 218 62,0 126
6 336 95,5 105 318 90,4 113 300 85,3 122 276 78,5 133 263 74,8 139 227 64,5 127
347 98,7 106 310 88,1 123 274 77,9 139 237 67,4 127
8 359 102 107 340 96,7 115 322 91,6 124 288 81,9 134 283 80,5 141 219 62,3 112
9 371 106 109 352 100 117 332 94,4 126 306 87,0 136 293 83,3 142 227 64,5 113
10 383 109 110 362 103 118 344 97,8 127 317 90,1 137 304 86,4 143 236 67,1 113
5 386 110 124 366 104 134 343 97,5 144 316 89,9 158 301 85,6 165 286 81,3 172
6 400 114 126 377 107 136 356 101 146 327 93,0 159 312 88,7 167 297 84,5 174
412 117 128 369 105 148 324 92,1 168 307 87,3 175
8 425 121 129 404 115 139 380 108 150 351 99,8 162 336 95,5 170 320 91,0 176
9 440 125 131 417 119 141 394 112 151 364 104 164 348 99,0 170 331 94,1 177
10 455 129 133 430 122 142 406 115 153 376 107 165 360 102 172 344 97,8 178
5 445 127 137 422 120 148 397 113 160 364 104 175 348 99,0 183 299 85,0 168
6 460 131 139 436 124 150 410 117 162 378 108 177 361 103 185 312 88,7 169
476 135 141 425 121 164 375 107 187 323 91,8 171
8 491 140 143 467 133 154 440 125 166 406 115 180 389 111 188 301 85,6 149
9 508 144 144 483 137 156 456 130 168 420 119 182 403 115 190 312 88,7 151
10 524 149 146 497 141 158 469 133 170 435 124 184 417 119 192 323 91,8 152
5 508 144 158 483 137 171 455 129 185 419 119 203 400 114 212 381 108 222
6 527 150 160 499 142 173 470 134 187 434 123 205 415 118 214 396 113 224
545 155 163 488 139 189 431 123 215 412 117 225
8 561 160 165 535 152 177 505 144 191 467 133 208 448 127 217 428 122 226
9 581 165 166 553 157 179 522 148 193 485 138 210 464 132 219 445 127 227
10 600 171 169 571 162 181 542 154 195 502 143 211 482 137 220 414 118 201
5 607 173 189 577 164 205 542 154 223 503 143 244 481 137 256 458 130 269
6 627 178 193 597 170 208 564 160 225 521 148 247 500 142 258 427 121 237
651 185 195 585 166 227 520 148 260 443 126 239
8 673 191 198 639 182 213 605 172 230 561 160 251 536 152 263 460 131 241
9 695 198 200 663 189 216 628 179 232 580 165 254 558 159 264 479 136 242
10 716 204 203 681 194 218 648 184 235 601 171 255 579 165 266 439 125 212
5 750 213 234 714 203 253 674 192 274 622 177 301 598 170 314 570 162 329
6 778 221 237 738 210 256 700 199 277 647 184 303 620 176 317 592 168 331
807 230 240 724 206 280 642 183 320 614 175 334
8 834 237 243 792 225 263 749 213 283 698 199 309 667 190 323 641 182 336
9 860 245 247 818 233 266 776 221 286 720 205 312 694 197 325 664 189 339
10 889 253 250 846 241 270 804 229 289 747 212 315 716 204 328 688 196 341
5 893 254 271 853 243 295 800 228 325 742 211 359 708 201 378 675 192 397
6 928 264 274 885 252 296 832 237 328 768 218 362 736 209 380 702 200 400
960 273 277 861 245 330 763 217 383 732 208 401
8 987 281 279 941 268 306 890 253 334 827 235 368 793 226 387 679 193 356
9 1020 290 282 971 276 309 921 262 337 857 244 371 823 234 390 704 200 357
10 1054 300 285 1003 285 312 953 271 340 886 252 375 853 243 392 731 208 360
5 1074 305 320 1018 290 351 959 273 383 884 251 424 843 240 446 803 228 469
6 1114 317 324 1055 300 354 993 282 386 915 260 428 874 249 450 835 237 472
1146 326 327 1025 292 391 907 258 453 867 247 473
8 1190 338 330 1130 321 361 1062 302 394 987 281 434 945 269 455 808 230 418
9 1231 350 334 1168 332 364 1103 314 398 1021 290 438 978 278 460 837 238 421
10 1272 362 338 1208 344 368 1138 324 401 1055 300 443 1011 288 464 869 247 425
kWf: Cooling capacity (kW).
TONf: Cooling capacity (TON).
kWe: Power input (kW).
To: Evaporator leaving water temperature ( in./out =5 K).

HEA
TING CAPACITY
ACITY
Ta (°C)
RH(%)
CONDENSER INLET/OUTLET WA
TER TEMPERA
TURE °C
30/35 35/40
kWt TONt kWe
kWt TONt kWe
kWt TONt kWe
0 90 186 52,9 64,4 188 53,5 70,0 190 54,0 76,0
5 90 211 60,0 65,1 214 60,8 72,2 216 61,4 78,2
223 63,4 65,6 226 64,3 72,2
10 70 232 66,0 66,0 234 66,5 73,3 236 67,1 80,0
15 60 252 71,7 66,7 253 71,9 73,5 254 72,2 80,0
0 90 218 62,0 68,8 220 62,6 75,1 223 63,4 81,0
5 90 247 70,2 69,2 250 71,1 75,9 252 71,7 83,2
261 74,2 69,2 265 75,4 77,1
10 70 271 77,1 70,2 274 77,9 77,1 276 78,5 85,0
15 60 295 83,9 70,6 296 84,2 78,0 297 84,5 86,1
0 90 258 73,4 74,0 260 73,9 82,0 263 74,8 89,2
5 90 292 83,0 75,2 295 83,9 84,2 299 85,0 92,1
308 87,6 77,1 313 89,0 84,3
10 70 320 91,0 77,1 324 92,1 84,7 327 93,0 93,3
15 60 349 99,2 78,2 351 99,8 86,0 352 100 94,4
0 90 308 87,6 85,4 313 89,0 94,2 316 89,9 102
5 90 350 99,5 87,1 354 101 96,0 359 102 105
370 105 88,3 376 107 96,0
10 70 384 109 88,3 388 110 97,1 392 112 107
15 60 418 119 89,1 420 119 98,2 422 120 108
0 90 364 104 94,2 368 105 103 372 106 113
5 90 412 117 95,2 417 119 105 423 120 116
437 124 96,4 442 126 106
10 70 454 129 97,5 458 130 107 462 131 118
15 60 494 141 98,1 495 141 108 497 141 119
0 90 429 122 113 434 123 126 440 125 136
5 90 486 138 115 493 140 128 499 142 139
515 146 116 522 148 129
10 70 535 152 118 541 154 129 546 155 142
15 60 583 166 119 585 166 131 587 167 143
0 90 495 141 134 501 143 148 506 144 162
5 90 561 160 137 568 162 150 575 164 165
594 169 138 602 171 151
10 70 617 175 139 624 177 152 629 179 168
15 60 673 191 141 675 192 154 677 193 170
0 90 614 175 167 621 177 185 628 179 201
5 90 695 198 171 705 201 188 713 203 207
737 210 172 746 212 189
10 70 765 218 173 773 220 190 780 222 211
15 60 834 237 175 836 238 194 839 239 212
0 90 717 204 194 725 206 215 733 208 234
5 90 813 231 199 822 234 219 832 237 240
860 245 200 871 248 221
10 70 893 254 202 903 257 222 912 259 245
15 60 973 277 204 976 278 225 980 279 247
0 90 797 227 226 806 229 249 816 232 271
5 90 903 257 229 915 260 253 927 264 278
957 272 232 969 276 255
10 70 994 283 233 1004 286 257 1013 288 283
15 60 1083 308 237 1086 309 260 1091 310 285
Ta: Ambient air temperature dry bulb (°C)
RH: Ambient air relative humidity (%)
kWt: Heating capacity (kW)
TONt: Heating capacity (TON).
kWe: Power input (kW)

WA
TER CIRCUIT PRESSURE DROPS
ft WG
66,6
kPa
200
P erdite di carico - Pressure drop s
33,3
30,0
26,6
23,3
20,0
16,6
13,3
10,0
100
90
80
70
60
50
40
30
1202-B
1302-B
1502-B
1702-B
1902-B
2002-B
2602-B
3002-B
3602-B
4202-B
6,6
20
3,3
10
3 4
6 8 10 15 20 30 40 50 70 l/s
47,5 63,4
95,1 126,8 158,5 237,7 317,0
475,5 634,0 792,5 1109,5 gpm
Water flow
EVAPOR
APORA
ATORS WA
TER FLOW LIMITS
Model
l/s 4,6 5,7 7,1 7,1 8,4 9,2 10,5 12,9 14,1 19,4
gpm 72,9 90,4 112,5 112,5 133,1 145,8 166,4 204,5 223,5 307,5
l/s 13,3 18,2 20,6 20,6 24,7 28,5 32,9 39,8 47,4 59,5
gpm 210,8 288,5 326,5 326,5 391,5 451,7 521,5 630,8 751,3 943,1
CORRECTION FACTORS
If an unit is made to operate with a glycol-water solution, the following correction factors should be applied to any calculations.
Ethylene glycol percent by
weight (%)
Freezing point ( °C)
Cooling capacity corr. factor
Power input corr. factor
Pressure drop corr. factor
0 -4,5 -9,5 -15,5 -21,5 -32,5
1 0,975 0,95 0,93 0,91 0,88
1 1,01 0,995 0,990 0,985 0,975
1 1,01 1,04 1,08 1,14 1,20
1 1,05 1,13 1,21 1,26 1,32
Evaporator fouling factor corrections
0 Clean evaporator
0,44 x 10 -4 (m² °C/W)
0,88 x 10 -4 (m² °C/W)
1,76 x 10 -4 (m² °C/W)
f1: capacity correction factors;
fp1: compressor power input correction factor;
unit performances reported in the tables are given for the condition
of clean exchanger (fouling factor = 0). For different fouling
factors values, unit performances should be corrected with the
correction factors shown above.
1 1
0,98 0,99
0,96 0,99
0,93 0,98

REFRIGERA
TION CIRCUIT DIAGRAM
WCHAXT/Y 1202-B and 2002-B
Only cooling units
VDS
VDS
RM
CA
MV
RM
MHP
TP
MHP
TP
SPH
SPS
P>
P>
VP
RC
FD
RLL
RLL
FD
SPH
SPS
P>
P>
RC
VP
SPL
P<
MLP
MC
TP
SF
VT
T
VT
SF
SPL
P<
MLP
MC
TP
EW
VDS
TP
T
T
T
T
TP
VDS
DESIGNA
TION
Condenser
Evaporator
Filter-drier
Compressor
High pressure guage
(accessory
)
Low pressure guage
(accessory
)
Axial fans
Crank case heater
Liquid line shut-off valve
(accessory
)
Discharge line
Sight glass
High pressure switch
Low pressure switch
Safety pressure gauges
Pressure transmitter
Safety valve
Step regulation valve
stepless (accessory )
Electronic expansion valve

REFRIGERA
TION CIRCUIT DIAGRAM
WCHAXT/Y 1302-B to1902-B and 2602-B to 4202-B
Only cooling units
VDS
VDS
RM
CA
MV
RM
TP
TP
MHP
SF
FD
RLL
RLL
FD
SF
MHP
SPS
P>
SPS
P>
SPH
P>
VP
RC
SPH
P>
RC
VP
SPL
P<
MC
ELE
VTE
SCE
SCE
VTE
ELE
P<
SPL
MC
MLP
TP
VT
VT
MLP
TP
T
EW
VDS
TP
T
T
T
T
TP
VDS
DESIGNA
TION
Condenser
Electro valve (economizer)
Evaporator
Filter-drier
Compressor
High pressure guage
(accessory)
Low pressure guage
(accessory)
Axial fans
Crank case heater
Liquid line shut-off valve
(accessory)
Discharge line
Heat exchanger
(economizer)
Sight glass
High pressure switch
Low pressure switch
Safety pressure gauges
Pressure transmitter
Safety valve
Step regulation valve
stepless (accessory)
Electronic expansion
valve
Thermostatic valve
(economizer)

REFRIGERA
TION CIRCUIT DIAGRAM
WCHAXT/Y/WP 1302-B to1902-B and 2602-B to 6302-B
Heat pump units
CV
CV
CV
CV
VT
SCE
VTE
ELE
ELE
VTE
VT
SCE
FD
FD
CV
SF
RLL
CV
LR
LR
CV
RLL
SF
CV
MV
CEC
VDS
RCV
TP
TP
RCV
VDS
VDS
VP
T
VPR MHP
RM
RC
MC
TP
P>
P>
SPS
SPH
T T
SCA
T
SPS
SPH
P>
P>
T
MHPVPR
RM
RC
MC
TP
VP
VDS
TP
SLG
P<
MLP
SPL
SPL
P<
MLP
SLG
TP
DESIGNA
TION
Finned coil
Check valve
Filter-drier
Liquid receiver
Compressor
High pressure guage
(accessory)
Low pressure guage
(accessory)
Axial fans
Crank case heater
4-Way valve
Liquid line shut-off valve
Discharge line
Water cooled exchanger
Sight glass
Liquid/gas separator
High pressure switch
Low pressure switch
Safety pressure gauges
Pressure transmitter
Safety valve
Step regulation valve
stepless (accessory)
Pressure valve
Electronic expansion valve

REFRIGERA
TION CIRCUIT DIAGRAM
WCHAXT/Y/WP 1202-B and 2002-B
Heat pump units
CV
CV
CV
CV
VT
VT
FD
FD
CV
SF
RLL
CV
LR
LR
CV
RLL
SF
CV
MV
CEC
VDS
RCV
TP
TP
RCV
VDS
VDS
VP
T
VPR MHP
RM
RC
MC
TP
P>
P>
SPS
SPH
T T
SCA
T
SPS
SPH
P>
P>
T
MHPVPR
RM
RC
MC
TP
VP
VDS
TP
SLG
P<
MLP
SPL
SPL
P<
MLP
SLG
TP
DESIGNA
TION
Finned coil
Check valve
Filter-drier
Liquid receiver
Compressor
High pressure guage
(accessory)
Low pressure guage
(accessory)
Axial fans
Crank case heater
4-Way valve
Liquid line shut-off valve
Discharge line
Water cooled exchanger
Sight glass
Liquid/gas separator
High pressure switch
Low pressure switch
Safety pressure gauges
Pressure transmitter
Safety valve
Step regulation valve
stepless (accessory)
Pressure valve
Electronic expansion valve

UNITS WITH PUMP
Technical data
MODELS
Nominal power - pump
Max. working pressure
Head pressure (1)
Expansion vessel volume (2)
MODELS
Nominal power - pump
Max. working pressure
Head pressure (1)
Expansion vessel volume (2)
kW 3,0 4,0 5,5 5,5 5,5
kPa 600 600 600 600 600
ft WG 200 200 200 200 200
kPa 175 195 225 205 170
ft WG 58,3 65,0 75,0 68,3 56,7
l 35 35 35 35 35
gal 9,2 9,2 9,2 9,2 9,2
kW 7,5 7,5 7,5 11 11
kPa 600 600 600 600 600
ft WG 200 200 200 200 200
kPa 190 165 125 160 140
ft WG 63,3 55,0 41,7 53,3 46,7
l 80 80 80 80 80
gal 21,1 21,1 21,1 21,1 21,1
Weight
calculation: The weight in operation indicated below is
composed of:
- weight of the pump and pipework.
The value is then to be added to the TRANSPORT WEIGHT of the
machine referred to. The result is the total weight of the unit in opera-
tion. This is a necessary detail to calculate the concrete base of the
chiller and select antivibration mounts.
Additional weight in operation and water connections
MODELS
Additional weight while funct. Kg 130 150 170 170 170
Water connections
DN 100 100 100 100 125
Additional weight while funct. Kg 215 255 280 280 280
Water connections
DN 100 100 100 100 125
MODELS
Additional weight while funct. Kg 205 205 205 305 345
Water connections
DN 125 150 150 150 200
Additional weight while funct. Kg 355 355 355 520 585
Water connections
DN 125 150 150 150 200
(1) Referential conditions at page 4.
(2) The expansion vessel on the units with single pump has a content of 24 lt (gal 6,3).

UNITS WITH STORAGE TANK AND PUMPS
Characteristic pump curves
ft WG kPa
ft WG kPa
93,3
280
93,3
280
80,0
240
1202-B
80,0
240
1302-B
66,6
200
66,6
200
53,3
160
53,3
160
40,0
120
40,0
120
26,6
80
26,6
80
13,3
40
13,3
40
0 0
0
0
2 4 6 8 10 12 14 16
31,7 63,4 95,1 126,8 158,5 190,2 221,9 253,6
l/s
gpm
0 0
0
0
2 4 6 8 10 12 14 16
31,7 63,4 95,1 126,8 158,5 190,2 221,9 253,6
l/s
gpm
ft WG kPa
116,6 350
ft WG kPa
120,0 360
100,0
83,3
66,6
300
250
200
1502-B
1702-B
1902-B
93,3 280
66,6 200
2002-B
2602-B3002-B
50,0
33,3
150
100
40,0 120
16,6
50
13,3
40
0 0
0 5 10 15 20 25 30
0 79,2 158,5 237,7 317,0 396,2 475,5
I/s
gpm
0
0
0 10
20 30
40 I/s
0 158,5 317,0 475,5 634,0 gpm
ft WG kPa
120,0
360
93,3
280
66,6 200
4202-B
3602-B
40,0 120
13,3
0
40
0
0 10 20 30 40 50 60
0 158,5 317,0 475,5 634,0 792,5 951,0
I/s
gpm

A
Y Y
DIMENSIONS AND CLEARANCES
Only cooling units
X
C
X
B
View "X-X"
1800 mm
Y - Water connections.
500 mm
1000 mm
Clearance area
1800 mm
DIMENSIONS
A mm 2800 2800 4000 4000 5000 5000 5000 7200 8400 8400
B mm 2200 2200 2200 2200 2200 2200 2200 2200 2200 2200
C mm 2500 2500 2500 2500 2500 2500 2500 2500 2500 2500

POSITION OF WA
TER CONNECTIONS
IN
OUT
D
E
F
STANDARD CONFIGURATION: hydraulic connections on the left side panel view.
On request, attacks on the right side (mirror dimensions).
D mm 420 450 450 450 450 460 460 400 400 400
E mm 200 200 500 500 1300 900 900 1900 2000 1800
F mm 1830 1750 2150 2150 2150 2500 2500 3100 2900 3500

WA
TER CIRCUIT
General characteristics
Water circuit
t.
Includes:evaporator,temperaturesensor,antifreezesensorandwaterdrain.
PU - Water circuit with additional circulation pump.
Includes: evaporator, temperature sensor, antifreeze sensor, circula-
expansion vessel, safety valve and thermal relay.
PD - Water circuit with additional double circulation pump.
Includes: evaporator, temperature sensor, antifreeze sensor, double
lines, expansion vessel, safety valve, check valve and thermal relais.
WA
TER CIRCUIT DIAGRAM
DESIGNA
TION
Gate valve
Evaporator
Flow switch
Water manometer
Double circulating pump
Single circulating pump
Intercepting valve
Water drain
Air vent
Sensor for unit operation
Antifreeze sensor
Expansion vessel
Safety valve (600 kPa - 200 ft WG)

WEIGHTS
X-X
100 200
X
K3
K2
K1
K6
K5
6xØ18
K4
40
X-X
100 200
500
X
900
900
500
2800
40
1200
500
K4 K8
K4 K9
X X X X
900
1000
K3 K7
K3 K8
K2 K6
X-X
100200
4000
100200
40
500
K5 K10
1200 900
K2 K7
8xØ18 900
10xØ18 900
K1 K5
500
K1 K6
500
X-X
5000
X
K7
K6
K5
K4
K3
K2
K1
X-X
100200
40
500
K14
1200
K13
1000
K12
1200
K11
X
1000
K10
900
K9
14xØ18 900
K8
500
7200
X
K8
K7
K6
K5
K4
K3
K2
K1
40
K16 500
1200
X
K15
1000
K14
1200
K13
1000
K12
900
K11
1200
K10
900
K9
500
8400
OPERA
TING WEIGHT (Kg)
K1 Kg 450 460 410 430 400 440 450 440 470 500
K2 Kg 410 420 380 400 370 410 420 410 430 460
K3 Kg 380 390 330 350 340 370 380 370 400 430
K4 Kg 530 580 290 310 300 340 350 340 370 400
K5 Kg 500 550 530 540 270 310 320 320 350 370
K6 Kg 470 510 490 510 500 550 560 280 320 350
K7 Kg --- --- 450 470 470 520 530 260 300 320
K8 Kg --- --- 410 430 440 480 490 580 280 290
K9 Kg --- --- --- --- 400 450 460 550 590 640
K10 Kg --- --- --- --- 370 420 430 530 560 610
K11 Kg --- --- --- --- --- --- --- 500 520 580
K12 Kg --- --- --- --- --- --- --- 460 490 540
K13 Kg --- --- --- --- --- --- --- 430 470 520
K14 Kg --- --- --- --- --- --- --- 400 450 500
K15 Kg --- --- --- --- --- --- --- --- 420 470
K16 Kg --- --- --- --- --- --- --- --- 390 440
OPERA
TING WEIGHT (Kg)
K1 Kg 520 535 470 490 460 510 520 495 520 550
K2 Kg 485 495 435 460 430 485 490 470 475 515
K3 Kg 455 465 390 410 400 445 450 430 445 480
K4 Kg 600 655 345 370 360 415 420 400 415 450
K5 Kg 575 625 590 600 330 385 390 380 400 425
K6 Kg 545 585 545 570 560 620 630 340 365 400
K7 Kg --- --- 510 530 530 595 600 315 345 370
K8 Kg --- --- 465 490 500 555 560 640 325 340
K9 Kg --- --- --- --- 460 525 530 605 640 690
K10 Kg --- --- --- --- 430 495 500 590 605 665
K11 Kg --- --- --- --- --- --- --- 560 565 630
K12 Kg --- --- --- --- --- --- --- 520 535 590
K13 Kg --- --- --- --- --- --- --- 490 515 575
K14 Kg --- --- --- --- --- --- --- 455 500 550
K15 Kg --- --- --- --- --- --- --- --- 465 520
K16 Kg --- --- --- --- --- --- --- --- 435 490

The sound level values indicated in accordance with DIN 45635 in
-
ment is taken at 1m distance from the side of condensing coil and
at a height of 1,5 m with respect to the base of the machine. On the
noise levels that are indicated, a tolerance of +/- 3dB(A) should be
considered (according to DIN 45635). The values refer to a machine
without pump.
MODEL
49,5 50,0 50,5 50,5 51,0 52,0 53,5 54,0 54,0 54,5
61,5 61,5 61,5 62,0 62,5 63,0 67,0 67,5 68,0 68,5
73,0 73,5 73,5 73,5 75,0 75,5 75,5 76,0 77,0 77,0
73,5 74,0 74,0 74,0 75,0 76,0 77,0 78,5 79,0 79,5
72,5 73,5 73,5 73,5 74,0 74,5 75,5 76,0 77,0 77,5
71,0 71,0 71,5 71,5 72,0 72,5 73,5 74,0 75,0 74,5
68,5 69,0 69,0 69,5 70,0 70,0 70,5 72,0 72,5 73,0
51,5 52,0 52,5 52,5 53,0 54,0 55,0 55,5 56,0 56,5
MICROPROCESSOR CONTROL SYSTEM
A microprocessor controls all the functions of the unit and allows any
adjustments to be made. The set-points and operating parameters
are set directly into the microprocessor. This type of microprocessor
enables the adjustment of up to four compressors. It has a visual
alarm signal, pushbuttons for the various functions, and offers a
continuous control of the system as well as saving all the data in
case of a cut in the power supply. Through the display, one can input
and have an indication of set values.
Principal functions: indication of entering and leaving water temperature;
-
merical code; control of one or two pumps;
at start-up; prestarting of the fans; hour counter of compressors in
operation; automatic changeover of compressor and pump sequence;
compressors start individually and not together; frost protection;
remote on-off; operation signalling; manual operation; manual reset;
electronic card for connection to management and service systems.
Alarms: high and low pressure and overload on each compressor;
.
Accessories: electronic card for connection to management and
service systems, remote display.

WIRING DIAGRAMS EXPLANA
TION
DESIGNA
TION
DISPLAY (USER INTERFACE)
REMOTE DISPLAY *
ECONOMIZER
AUXILIARY CIRCUIT FUSES
COMPRESSOR FUSES CIRCUIT
PUMP FUSES
STORAGE TANK HEATER FUSE
FAN MOTOR FUSES
LIQUID IJECTION
AUXILIARY CONTACTOR
COMPRESSOR CONTACTOR
PUMP CONTACTOR
STORAGE TANK HEATER CONTACTOR
TIMER SWITCH
FAN MOTOR CONTACTOR
COMPRESSOR
PUMP
FAN MOTOR
COMPRESSOR CAPACITY STEPS
FLOW SWITCH
HP SWITCH CIRCUIT
MOTOR PROTECTION COMPRESSOR
LP SWITCH CIRCUIT
STORAGE TANK/EVAPORATOR HEATER
COMP. CRANKCASE HEATER
EVAPORATOR HEATER
PHASE SEQUENCE RELAY
SPEED GOVERNOR
ELECTRICAL BOARD HEATER
PIPES HEATER
COMPRESSOR OVERLOAD RELAY
PUMP OVERLOAD RELAY
ANTIFREEZE SENSOR
MICROPROCESSOR
BY-PASS VALVE
EXPANSION BOARD
MAIN SWITCH
TEMPERATURE SENSOR
LIQUID LINE VALVE
DISCHARGE LINE SENSOR
SERIAL INTERFACE *
AMBIENT AIR TEMPERATUR SENSOR
AMBIENT AIR TEMPERATUR THERMOSTAT
AUXILIARY TRASFORMER
PRESSURE TRANSDUCER
LOW PRESSURE TRANSMITTER
VT PRESSURE TRANSMITTER
ELECTRICAL BOARD THERMOSTAT
AUXILIARY TRASFORMER
REVERSE CYCLE VALVE CIRCUIT
* Loose accessory

11 14 12
L1
L2
L3
9
R 1
B W G B W G + T M B W G B W G + T M
3
2
1
6
5
4
7
8
POWER ELECTRICAL DIAGRAM:
WCHAXT/Y 1202-B to 4202-B
- Wiring diagram explanation at page 21;
- Dotted lines indicate optional electrical connections
or to carry out during the installation.
FC1
FC2
FV1
X1:
SG
KC1
RTC1
KC2
KC5
KC3
RTC3
KC4
KC6
X1:
L1 L2 L3 PE
U V W IN+ IN-
RG1
L1L2 L3 PE
X1:
10
11
SSC1
X1:
19
18
17
SSC2
400V/50Hz/3Ph/PE
RTC2
L1 L2 L3 PE
U V W IN+ IN-
L1 L2 L3 PE
U V W IN+ IN-
RTC4
Y-
Y+
X1:
12
16
15
14
13
X1:
24
23
22
21
20
1
2
0V
S C 1
PE
3
1
2
0V
S C 2
PE
3
KV1
KV2
MC1
7
8
9
MC2
7
8
9
PE
PE
L1 L2 L3 RTV1 L1 L2 L3 RTV2
MV1
MV2
PE
PE
CONTROL ELECTRICAL DIAGRAM:
WCHAXT/Y 1202-B to 4202-B
- Wiring diagram explanation at page 21;
- Dotted lines indicate optional electrical
connections or to carry out during the installation.
SB1
ID
IDCOM
ID
IDCOM
ID
ID
ID
ID
ID
ID
ID ID ID ID ID ID ID ID ID ID ID ID IDC ID ID
COM
AI AI AI
AI
+VDC
A1 GND AI +5V
AI
AI
AI
AI
AI AI AI AI AI AI
L3
L2
L1
FA1
RF
KA1
Y+
TQ1
TQ2
1
3
2
1
3
2
TT
400
0
FA2
230 0 0 24
PE
PE
RQ1
VQ1
KC1
KC3
PE
PE
R T C 1
R T C 3
FA3
R T C 2
R T C 4
KA1
RESET
PI1
RESET
PI2
X1:
41
43
PE
42
R C 1
44
R C 2
PE
45
46
PE
47
48
PE
49
50
PD
51
52
53
PI1
54
L N 11 14
55
56
57
58
67
68
P H 1
69
P H 2
72
71
70
P L 1
73
L
74
N
81
82
81
78
77
76
75
11
PI2
14
P H 3
82
P H 4
87
86
85
88
91
90
89
92
143
144
P 8
R T V 7
6
R T V 5
4
R T V 3
2 R T V 1
L 2
146
145
R T V 9
147
93
150
149
148
R T V 1 4
3
2
R T V 1 1
0
94
R TP 1
95
96
KP1
97
R TP 2
101
100
99
98
KP2
102
SA
104
103
SL
106
105
106A
TP1
169
170
171
T PL 1
177
176
175
S M 1
108A
1 TP 2
08
107
174
173
172
T PL 2
180
179
178
S M 2
166
165
E C 1
PE
168
167
E C 2
PE
124
123
PE
122
121
P C 1
P C 2
PE
162
1 61 C
P 3
PE
PE
126
125
REV1

L1
L2
L3
PE
PE
L1
L2
L3
PE
PE
L1
L2
L3
PE
PE
L1
L2
L3
PE
3
2
1
5
6
8
7
1
2
4
5
L
2
5
4
3
6
+ T M + T M
POWER ELECTRICAL DIAGRAM:
WCHAXT/Y 1202
- Wiring diagram explanation at page 21;
- Dotted lines indicate optional electrical connections
or to carry out during the installation.
L2
L1
L3
KV7
KV2
KV3
KV4
KV5
KV6
PE
PE
PE
PE
PE
PE
PE
PE
PE
PE
PE
PE
V2 L1 L2 L3 RTV3 L1 L2 L3 RTV4 L1 L2 L3 RTV5 L1 L2 L3 RTV6
MV3
MV4
MV5
MV6
PE
PE
PE
PE
L1 L2 L3 RTV7 L1 L2 L3 RTV8 L1 L2 L3 RTV9 L1 L2 L3 RTV10 L1 L2 L3 RTV11 L1 L2 L3 RTV12 L1 L2 L3 RTV13 L1 L2 L3 RTV14
MV7
MV8
MV9
MV10
MV11
MV12
MV13
MV14
PE
PE
PE
PE
PE
PE
PE
PE
FP1 FP2 FP2
FRA1
L1
L2
L3
KP2
RTP2
KRA1
KP1
RTP1
KP2
RTP2
MP1
MP2
MP2
RAC1
CONTROL ELECTRICAL DIAGRAM:
WCHAXT/Y 1202-B to 4202-B
Wiring diagram explanation at page 21;
Dotted lines indicate optional electrical
connections or to carry out during the installation.
AO AO AO AO L N AO AO
C NO C NO C NO C NO C NO C NO C NO C NO C NO C NO C NO C NO C NO C NO C NO C NO C NO C
NO
C
NO
C
NO NC C NO
G
Go
R120 CANH CANL GND
Y-
Y+
D1
230 0 MB1
TT
230
230 0 MB2
TT
230
FA
FA
3X3:
MD1
N
MD2
L
N
PE
126
127
R T 1
124A
123A
PE
122A
121A
128
P C 4
P C 5
PE
164
163
P C 6
S C 1
0V
K C 1
K C 2
K C 3
S C 2
K C 4
K C 5
K C 6
K V 1
K V 2
K V 3
K V 4
K V 5
K V 6
K V 7
KRA1
KA1
X2:
ON/OFF
4A
4
A LARM 1
EMERGENCY OFF
D2
R EMOTE DISPLA Y
SD1
X5
B1
1
1
SVT
TPVT1
VT1
PE
9
8
7
X5
B1
11
10
SVT2
14
13
12
TPVT2
VT2
18
17
16
15
PE

1
9
3
2
1
8
7
6
5
4
B W G B W G + T M B W G B W G + T M
POWER ELECTRICAL DIAGRAM:
WCHAXT/Y/WP 1202-B to 4202-B
- Wiring diagram explanation at page 21;
- Dotted lines indicate optional electrical connections
or to carry out during the installation.
FC1
FC2
FV1
X1:
SG
KC1
RTC1
KC2
KC5
KC3
RTC3
KC4
KC6
X1:
L1 L2 L3
U V W
PE
IN+ IN-
RG1
L1L2 L3 PE
X1:
11
10
SSC1
X1:
17
19
18
SSC2
400V/50Hz/3Ph/PE
L1
U
L2
V
L3
W
RTC2
L1
U
L2
V
L3
W
PE
IN+ IN-
PE
IN+ IN-
RTC4
Y-
Y 1 +
X1:
12
13
14
16
15
X1:
20
21
22
24
23
1 2 3
0V
SC1
PE
1 2
3
0V
SC2
PE
KV1
KV2
KV3
KV4
MC1
7 8 9
MC2
7 8
9
PE
PE
PE
PE
PE
PE
PE
L1 L2 L3 RTV1 L1 L2 L3 RTV2 L1 L2 L3 RTV3 L1 L2 L3 RTV4 L1 L2 L3 RTV5 L1 L2 L3 RTV6
MV1
MV2
MV3
MV4
MV5
MV6
PE
PE
PE
PE
PE
PE
L1 L2 L3 RTV7
MV7
PE
CHILLER E WP
CONTROL ELECTRICAL DIAGRAM:
WCHAXT/Y/WP 1202-B to 4202-B
- Wiring diagram explanation at page 21;
- Dotted lines indicate optional electrical
connections or to carry out during the installation.
SB1
ID IDCOM ID IDCOM ID
ID
ID
ID
ID
ID
ID
ID ID ID ID ID ID ID ID ID ID ID IDC ID ID COM AI AI AI AI
+VDC A1 GND AI +5V AI AI AI AI AI AI AI AI AI AI
AO AO AO AO
L N AO AO
L3
L2
L1
Y-
Y 2 +
Y 1 +
FA1
RF
11 14 12
L1 L2 L3
KA1
TQ1
1
TT
400
0
3
2
230 0 0 24
KC1
KC2
PE
FA3
PE
KA1
RQ1
PE
VQ1
PE
R TC 1
R T C 1 I
R T C 2 R TC 3
RESET
PI1
RESET
PI2
X1:
PE
42
4
C
R 1
43
44
R C 2
PE
45
47
PE
46
48
51
50
4 9
F L
PE
53
52
P I 1
54
L N 11 14
57
56
55
58
67
68
70
69
P H 2
P H 1
72
1
7
L
P 1
74
73
L N 11 14
78
77
76
75
P I 2
81
82
P H 3
81
82
87
86
85
88
89
90
91
92
143
R T 2
4
V 6
5
R T V 4
3
R T V 2
1
P L P H 144
R T V 7
148
147
146
145
149
152
151
150
R T V 1
1 4
3
R T 1 2
V R T V 1 0
9
R T V 8
153
154
155
156
93
100
99
98
97
96
95
94
R T P 1
K P 1
R T P 2
K P 2
101
102
105
104
103
SL
SA
106
T P 1
169
106A
171
170
TPL1
176
175
108A
1 08 P
107
177
S M 1
T 2
172
174
173
TPL2
178
140
1 39 I
180
179
S M 2
V 1
PE
PE
142
141
V I 2
165
122
121
PE
168
167
PE
166
ILQ1
ILQ2
P C 1
PE
124
123
P C 2
PE
162
161
PE
PE
126
125
127
122A
121A
128
P C 3
PE
164
163
PE
124A
123A
P C 4

PE
2
2
3
4
5
6
7
8
1
2
3
4
5
2
1
5
4
3
+
+
T
T
M
M
8
7
6
9
3
2
1
POWER ELECTRICAL DIAGRAM:
WCHAXT/Y/WP 1202-B to 4202-B
- Wiring diagram explanation at page 21;
- Dotted lines indicate optional electrical connections
or to carry out during the installation.
L1
L2
L3
FV2
FP1
FP2
X1:
11
10
9
RG2
L1 L2 L3
U V W
IN+
IN-
X1:
12
15
14
13
16
Y-
Y +
KV4A
KV5
KV6
KV7
KP1
KP2
RTP1
RTP2
PE
PE
PE
PE
PE
PE
PE
PE
PE
PE
TV7
L1 L2 L3 RTV9 L1 L2 L3 RTV10 L1 L2 L3 RTV11 L1 L2 L3 RTV12 L1 L2 L3 RTV13 L1 L2 L3 RTV14 L1 L2 L3 RTV15 L1 L2 L3 RTV16
MV9
MV10
MV11
MV12
MV13
MV14
MV15
MV16
MV17
PE
PE
PE
PE
PE
PE
PE
PE
L1 L2 L3
MP1
PE
L1 L2 L3
MP2
PE
CONTROL ELECTRICAL DIAGRAM:
WCHAXT/Y/WP 1202-B to 4202-B
- Wiring diagram explanation at page 21;
- Dotted lines indicate optional electrical
connections or to carry out during the installation.
C
NO
C NO C
C NO C NO C
NO C NO C
NO C NO C
NO C NO C NO
NO C NO C
NO C NO C NO C NO C
NO
C
NO C NO NO NC C NO G Go
C A N
CANH
CANH
CANL
CANGND
G N D
D+
D-
TT2
230 0
MB1
230
FA4
MD1
L
N
X5
PE
VT1
TPVT1
SVT1
PE
168
167
PE
166
165
164
E C 1
E C 2
K C 2
K C 1
K C 3
K C 4
K V 5
KV4A
K V 4
K V 3
K V 2
K V 1
K V 6
K V 7
K A 1
X2:
1 F
O N/O F
A LARM 1
4A
E MERGENCY OF F
SUMMER/WINTER
D1
J51
X3:
SD
DR J51
REMOTE DISPLAY
X1:
SS
138
137
137A
138A
138B
MODBUS TO BMS
SERIAL INTERFACE
TT3
FA5
MD2
X5
L
230 0
230
B1
N
11
10
MB2
12
14
13
PE
18
17
16
15
X3:
R120OHM
CAN NETWORK
VT2
TPVT2
SVT2

INSTALL
ALLA
A
TION RECOMMENDA
TIONS
Location:
- Strictly allow clearances as indicated in the catalogue.
- Ensure there are no obstructions on the air suction and discharge side.
- Locate the unit in order to be compatible with environmental requirements
(sound level, integration into the site, etc.).
Electrical connections:
- Check the wiring diagram enclosed with the unit, in wich are always
present all the instructions necessary to the electrical connections.
- Supply the unit at least 12 hours before start-up, in order to turn crank-
case heaters on. Do not disconnect electrical supply during temporary
stop periods (i.e. week-ends).
- Before opening the main switch, stop the unit by acting on the suitable
running switches or, if lacking, on the remote control.
- Before servicing the inner components, disconnect electrical supply by
opening the main switch.
- The electrical supply line must be equipped with an automatic circuit
breaker (to be provided by the installer).
- Electrical connections to be done:
◊ Three-wire power cable + ground cable;
- Optional electrical connections to be done:
◊ External interlock;
◊ Remote alarm signalling.
Hydraulic connections:
- Carefully vent the system, with pump turned off, by acting on the vent
valves. this procedure is fundamental: little air bubbles can freeze the
evaporator causing the general failure of the system.
- Drain the system during seasonal stops (wintertime) or use proper
mixtures with low freezing point.
- Install the hydraulic circuit including all the components indicated in the
recommended hydraulic circuit diagrams (expansion vessel, storage
etc.).
Start up and maintenance operations:
- Strictly follow what reported in use and maintenance manual. All these
operations must be carried on by trained personnel only.

U.S.A.
10000 ,
North Central Expressway
Suite 1410, Dallas Texas 75231
Phone: +972-437-4475
Fax: +972-437-4476
E-mail: in
fo@
westairind.com
U.A.E.
Dubai
P. PO. Box 12954
Phone: +971-4 267 0909
Fax: +971-4 267 5747
E-mail: in
fo@
westairind.com
www.westairind.com
All models, si
zes, dimensions
, and specifications a
re subject to change without prior notice.
CATALOG # WCHAXT/Y-B-02-2013