Dunham-Bush WCFX-E Series, Manual

Page 1: ...Products that perform By people who care WCFX E Series 60Hz Water Cooled Rotary Screw Water Chillers Cooling Capacity 70 to 1000 TR 246 to 3517 kW R134a...

Page 2: ...atures 4 Operating Benefits 9 Typical Sequence of Operation 10 Physical Specifications 11 Dimensional Data 13 Floor Loading Diagram 19 Water Pressure Drop 20 Sound Pressure Data 26 Electrical Data 26...

Page 3: ...inimum downtime during rework of faulty or damaged compressor Dunham Bush can arrange to provide a substitute reworked compressors while the faulty compressor is being reworked or repaired D Vapor inj...

Page 4: ...exclusive electronically initiated hydraulically actuated control arrangement Positive Displacement Direct Connected The compressor is directly connected to the motor without any complicated gear sys...

Page 5: ...space is decreased and the gas pressure consequently increased Discharge Phase At a point determined by the designed built in compression ratio the discharge port is covered and the compressed gas is...

Page 6: ...hiller water temperature derivative D Evaporator Pressure D Condenser Pressure D Compressor amp draw of each compressor D Compressor elapsed run time of each compressor D Compressor starts status D Oi...

Page 7: ...em however is very similar to centrifugal water chillers and is shown in the refrigerant cycle diagram below Liquid refrigerant enters the flooded evaporator uniformly where it absorbs heat from water...

Page 8: ...g may be exposed to temperatures below freezing glycol protection is recommended if the water is not drained The recommended protection is 15 F below the minimum ambient temperature in the equipment r...

Page 9: ...D ASHRAE Standard 15 Safety Code for Mechanical Refrigeration D National Electric Code D IEEE D Optional PED Refrigerant Compatibility D Designed to operate with environmentally safe and economically...

Page 10: ...emperature is below the deadband the compressor is commanded to unload Thus the compressor capacity is continuously modulated to match applied load and hold leaving chilled water temperature at setpoi...

Page 11: ...kW 776 6 692 8 874 3 750 9 1028 4 951 3 1162 0 1168 3 1320 6 10 4 kcal h 66 8 59 6 75 2 64 6 88 4 81 8 99 9 100 5 113 6 Min Unit Capacity 25 12 5 25 12 5 25 12 5 12 5 25 12 5 Power 460 3P 60Hz Compres...

Page 12: ...2650 8 3080 2 3223 7 3354 2 3510 7 10 4 kcal h 204 8 201 2 210 9 219 6 228 0 264 9 277 2 288 5 301 9 Min Unit Capacity 8 5 12 5 8 5 8 5 8 5 8 5 8 5 8 5 8 5 Power 460 3P 60Hz Compressor Model Qty 1227...

Page 13: ...630 16 7 16 417 14 7 16 366 124 1 4 3157 4 102 45 3 16 1148 5 127 6 152 WCFX E 15S 2 1 16 53 16 7 8 429 101 7 8 2588 6 153 1 9 16 39 12 3 8 315 5 5 8 143 83 1 4 2115 28 1 8 715 18 3 16 462 15 3 8 391...

Page 14: ...530 164 3 16 4171 11 16 17 3 1 2 89 6 7 8 175 15 7 8 403 22 5 16 567 30 3 4 782 5 5 8 143 70 1778 6 152 8 203 WCFX E 30S 20 508 40 11 16 1033 40 11 16 1033 40 11 16 1033 25 635 58 1 2 1486 53 1 2 135...

Page 15: ...3 16 3866 29 1 4 743 5 5 8 143 5 5 8 143 5 5 8 143 5 5 8 143 19 3 16 487 20 3 16 513 15 1 4 387 15 1 4 387 15 1 4 387 5 5 8 143 6 7 8 175 6 7 8 175 12 5 8 321 12 5 8 321 12 7 8 327 18 1 4 464 78 7 8 2...

Page 16: ...64 1 2 1638 64 1 2 1638 86 11 16 2202 7 8 22 1 7 8 48 18 15 16 480 196 3 4 4997 1 1 2 38 3 7 8 99 8 5 8 219 20 508 28 5 16 719 39 11 16 1008 7 3 8 187 80 2032 10 254 10 254 WCFX E 60T 15 381 55 1397...

Page 17: ...2057 86 2184 7 8 22 1 7 8 48 20 5 8 524 213 3 4 5429 1 1 2 38 4 1 4 108 10 3 16 259 25 1 2 648 27 5 16 694 41 1 2 1055 8 1 8 207 88 2235 12 305 12 305 WCFX E 84 15 381 60 11 16 1541 60 11 16 1541 60...

Page 18: ...1 11 16 1312 10 3 4 273 99 2515 14 356 14 356 WCFX E 118 20 508 52 7 16 1331 52 7 16 1331 52 7 16 1331 27 686 72 5 8 1845 72 5 8 1845 129 9 16 3291 7 8 22 1 7 8 48 17 7 8 454 199 5055 1 1 2 38 3 1 2 8...

Page 19: ...50T 2521 1144 3385 1536 2403 1090 3181 1443 2285 1036 2976 1350 2166 983 2771 1257 21688 9837 54T 2696 1223 3713 1684 2579 1170 3489 1583 2461 1116 3265 1481 2343 1063 3041 1380 23588 10699 57T 2811...

Page 20: ...6T 1 10 100 1000 10000 Pressure Drop ft wg Water Flow Rate USgpm 1 10 100 100 1000 10000 Pressure Drop ft wg Water Flow Rate USgpm 46T 50T 73T 75T 81T 54T 57T 60T 20T 22T 24T 27T 30T 38T 40T 20T 22T 2...

Page 21: ...ate USgpm WATER PRESSURE DROP IMPERIAL UNITS 1C EVAPORATOR 3 PASS a Single Compressor b Twin Compressors c Three Compressors 2A CONDENSER 1 PASS a Single Compressor b Twin Compressors c Three Compress...

Page 22: ...Rate USgpm WATER PRESSURE DROP IMPERIAL UNITS 2B CONDENSER 2 PASS a Single Compressor b Twin Compressors c Three Compressors 2C CONDENSER 3 PASS a Single Compressor b Twin Compressors c Three Compress...

Page 23: ...10 100 1000 100 1000 10000 Pressure Drop kPa Water Flow Rate m hr 57T 60T 73T 75T 81T 10 100 100 1000 10000 Pressure Drop kPa Water Flow Rate m hr 20T 22T 24T 40T 38T 27T 30T 54T 50T 46T 40T 20T 22T 2...

Page 24: ...WATER PRESSURE DROP SI UNITS 1C EVAPORATOR 3 PASS a Single Compressor b Twin Compressors c Three Compressors 2A CONDENSER 1 PASS a Single Compressor b Twin Compressors c Three Compressors Note Above...

Page 25: ...ER PRESSURE DROP SI UNITS 2B CONDENSER 2 PASS a Single Compressor b Twin Compressors c Three Compressors 2C CONDENSER 3 PASS a Single Compressor b Twin Compressors c Three Compressors Note Above water...

Page 26: ...0 408 3 612 4 20S 460VAC 10 400 200 1222 1 154 499 749 20T 460VAC 10 300 200 1210 2 78 0 2 283 0 2 424 5 2 22T 460VAC 10 400 200 1210 1 1212 1 78 0 104 0 283 0 392 0 424 5 588 0 23S 460VAC 10 400 200...

Page 27: ...27 TYPICAL WIRING SCHEMATIC Two Compressors Unit...

Page 28: ...28 TYPICAL WIRING SCHEMATIC...

Page 29: ...29 TYPICAL WIRING SCHEMATIC...

Page 30: ...30 TYPICAL WIRING SCHEMATIC...

Page 31: ...31 TYPICAL WIRING SCHEMATIC...

Page 32: ...only the capacity required for the variable heating load This would enable the remainder of the base cooling load to be handled by a separate chiller utilizing evaporator entering condensing water tem...

Page 33: ...e point floating or tri state control and the analog can be used to drive a 0 10 vdc actuator Thus even though there has been a trend toward fan cycling control of cooling towers it is not a device th...

Page 34: ...ages can be controlled via an Equipment Management Center D Unit mounted disconnect switch 400 to 575 volts applications D Flanged semi hermetic compressor D Discharge service valve for MSC 226 series...

Page 35: ...ompressor loading based on leaving chilled water temperature It shall provide for high and low refrigerant pressure protection low oil level protection evaporator water freeze protection sensor error...

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