Dunham-Bush WCFX-E Series Manual
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Dunham-Bush WCFX-E Series Manual

Water cooled rotary screw water chillers. cooling capacity: 70 to 1000 tr (246 to 3517 kw)
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WCFX-E Series 60Hz
Water Cooled Rotary Screw Water Chillers
Cooling Capacity: 70 to 1000 TR (246 to 3517 kW)
R
134a
Products that perform...By people who care

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Summary of Contents for Dunham-Bush WCFX-E Series

  • Page 1 WCFX-E Series 60Hz Water Cooled Rotary Screw Water Chillers Cooling Capacity: 70 to 1000 TR (246 to 3517 kW) 134a Products that perform...By people who care...

  • Page 2: Table Of Contents

    INTRODUCTION The Dunham-Bush WCFX-E Water Cooled Rotary Screw Flooded Chillers are available from 70 to 1000 TR [246 to 3517 kW]. These units are supplied with rotary screw compressors that are backed by more than 40 years of experience. In fact, a one-year parts warranty is provided on the entire unit at no extra cost.

  • Page 3: Components

    STANDARD FEATURES downtime during rework of faulty or damaged Size/Range compressor, Dunham-Bush can arrange to provide a 37 Models from 70 to 1000 TR [246 to 3517 kW]. substitute reworked compressors while the faulty Multiple compressor units provide redundancy, and compressor is being reworked or repaired.

  • Page 4: Unit Features

    OIL STRAINER MALE (DRIVE) Compressor Assembly Oil Separation The Dunham-Bush rotary screw compressor is a positive Each compressor is provided with up to 2 integral oil displacement helical-axial design for use with high- separator/impingement plate located below the discharge pressure refrigerants.
  • Page 5 Compressor Fully Loaded Slide Valve Control Movement of the slide valve is programmed by an Suction gas can then pass back from the rotor housing to exclusive Dunham-Bush electronically initiated the inlet port area before it has been compressed. Since variations...
  • Page 6 Voltage readout is Vision 2020i a flexible and advance programmable also offered as an optional feature. electronic controller designed specifically applications and precise control of Dunham-Bush Rotary Capacity Control Screw compressor chillers. Leaving chilled water temperature control...
  • Page 7 The gaseous refrigerant is then drawn out of the flash Dunham-Bush Water Cooled Screw Flooded Chillers are economizer and into the vapor injection port of the designed for efficiency and reliability. The rotary screw compressor.
  • Page 8 38°F, glycol should be used to prevent freeze damage. The freeze protection level should be 15°F lower than the Dunham-Bush Rotary Screw Water Chillers combine the leaving brine temperature. efficient operation of multiple rotary screw compressors...

  • Page 9: Operating Benefits

    Units feature optional split design to allow easy fit by your Dunham-Bush Sales Representatives utilizing the through any standard commercial doorway. WCFX-E Computer Selection Program. Data which can...

  • Page 10: Typical Sequence Of Operation

    TYPICAL SEQUENCE OF OPERATION The Dunham-Bush Water Cooled Screw Flooded Chiller to match applied load and hold leaving chilled water depends mainly on its on-board controller for control. temperature at setpoint. Operation described is for a two- compressor unit and is If the applied load is greater than one compressor can very similar for single or three-compressor units.

  • Page 11: Physical Specifications

    85/95 °F, Fouling factor of evaporator 0.0001 hr.ft .°F/Btu, Fouling factor of condenser 0.00025 hr.ft .°F/Btu. 2. Actual capacity will depend on the specified conditions. To consult nearest Dunham-bush sales office for computer selections. 3. Non-standard chillers can be designed according to different requirements. - 11 -...
  • Page 12 85/95 °F, Fouling factor of evaporator 0.0001 hr.ft .°F/Btu, Fouling factor of condenser 0.00025 hr.ft .°F/Btu. 2. Actual capacity will depend on the specified conditions. To consult nearest Dunham-bush sales office for computer selections. 3. Non-standard chillers can be designed according to different requirements. - 12 -...

  • Page 13: Dimensional Data

    DIMENSIONAL DATA WCFX-E 10S, 12S, 15S MODEL HEIGHT LENGTH WIDTH Y (Ø) Z (Ø) 2 1/16 16 11/16 101 7/8 2 1/2 10 1/16 5 1/8 72 15/16 22 13/16 14 3/4 14 7/16 124 1/4 42 3/16 WCFX‐E 10S [153] [102] [127] [127] [53] [424] [2588] [63] [256] [130] [1852] [580] [374] [366] [3157] [1072] 2 1/16 16 11/16...
  • Page 14 DIMENSIONAL DATA WCFX-E 20S*, 23S*, 24S*, 27S*, 30S*, 36S, 41S *Optional compact footprint series is available. Unit height may be increased. Please consult factory for details. Notes : 1.) All dimensions are in inches[mm]. 2.) Above drawing is for Superior model. Consult factory for Standard and Premium model dimension. - 14 -...
  • Page 15 DIMENSIONAL DATA WCFX-E 20T*, 22T*, 24T*, 27T*, 30T* *Optional compact footprint series is available. Unit height may be increased. Please consult factory for details. Notes : 1.) All dimensions are in inches[mm]. 2.) Above drawing is for Superior model. Consult factory for Standard and Premium model dimension. - 15 -...
  • Page 16 DIMENSIONAL DATA WCFX-E 38T*, 40T*, 46T*, 50T, 54T, 57T, 60T, 73T, 75T, 81T *Optional compact footprint series is available. Unit height may be increased. Please consult factory for details. Notes : 1.) All dimensions are in inches[mm]. 2.) Above drawing is for Superior model. Consult factory for Standard and Premium model dimension. - 16 -...
  • Page 17 DIMENSIONAL DATA WCFX-E 69, 73, 77, 81, 84, 87, 90 Notes : 1.) All dimensions are in inches[mm]. 2.) Above drawing is for Superior model. Consult factory for Standard and Premium model dimension. - 17 -...
  • Page 18 DIMENSIONAL DATA WCFX-E 108, 113, 118, 123 Notes : 1.) All dimensions are in inches[mm]. 2.) Above drawing is for Superior model. Consult factory for Standard and Premium model dimension. - 18 -...

  • Page 19: Floor Loading Diagram

    FLOOR LOADING DIAGRAM WCFX-E 10S, 12S, 15S, 19S WCFX-E 108, 113, 118, 123 20T, 22T, 24T, 27T, 30T WCFX-E 20S, 23S, 24S, 27S, 30S, 36S, 41S, 38T, 40T, 46T, 50T, 54T, 57T, 60T, 73T, 75T, 81T, 69, 73, 77, 81, 84, 87, 90 POINT LOAD DATA Operating Weight Model...

  • Page 20: Water Pressure Drop

    WATER PRESSURE DROP IMPERIAL UNITS 1A.) EVAPORATOR 1 PASS 1B.) EVAPORATOR 2 PASS Single Compressor Single Compressor 24S,27S 19S,20S,23S 20S,23S 1000 10000 1000 10000 Water Flow Rate - USgpm Water Flow Rate - USgpm b.) Twin Compressors b.) Twin Compressors 46T,50T 22T, 24T 54T,57T...
  • Page 21 WATER PRESSURE DROP IMPERIAL UNITS 1C.) EVAPORATOR - 3 PASS 2A.) CONDENSER - 1 PASS a.) Single Compressor a.) Single Compressor 20S,23S 15S,20S 27S,30S 23S,24S 1000 10000 1000 10000 Water Flow Rate - USgpm Water Flow Rate - USgpm b.) Twin Compressors b.) Twin Compressors 46T,50T 54T,57T...
  • Page 22 WATER PRESSURE DROP IMPERIAL UNITS 2B.) CONDENSER 2 PASS 2C.) CONDENSER 3 PASS a.) Single Compressor a.) Single Compressor 19S,24S 1000 1000 10000 Water Flow Rate - USgpm Water Flow Rate - USgpm b.) Twin Compressors b.) Twin Compressors 20T, 22T 20T,22T 54T,57T 1000...
  • Page 23 WATER PRESSURE DROP SI UNITS 1A.) EVAPORATOR 1 PASS 1B.) EVAPORATOR 2 PASS a.) Single Compressor a.) Single Compressor 1000 24S,27S 20S,23S 19S,20S,23S 1000 1000 Water Flow Rate - m³/hr Water Flow Rate - m³/hr b.) Twin Compressors b.) Twin Compressors 1000 46T,50T 22T,24T...
  • Page 24 WATER PRESSURE DROP SI UNITS 1C.) EVAPORATOR - 3 PASS 2A.) CONDENSER - 1 PASS a.) Single Compressor a.) Single Compressor 15S,20S 23S,24S 20S,23S 27S,30S 1000 1000 Water Flow Rate - m³/hr Water Flow Rate - m³/hr b.) Twin Compressors b.) Twin Compressors 1000 20T,22T...
  • Page 25 WATER PRESSURE DROP SI UNITS 2B.) CONDENSER 2 PASS 2C.) CONDENSER 3 PASS a.) Single Compressor a.) Single Compressor 19S,24S 1000 1000 Water Flow Rate - m³/hr Water Flow Rate - m³/hr b.) Twin Compressors b.) Twin Compressors 1000 20T,22T 20T,22T 54T,57T 1000...

  • Page 26: Sound Pressure Data

    SOUND PRESSURE DATA Octave Band (Hz) Octave Band (Hz) Model TOTAL Model TOTAL WCFX-E dB (A) WCFX-E dB (A) Note: Sound Pressure Level dB(A) @ 3.3ft [1m] (free field) ± 2dBA. ELECTRICAL DATA Unit Compressor Model Max. Fuse Min. Circuit WCFX-E Power Supply Compressor Model...

  • Page 27: Typical Wiring Schematic

    TYPICAL WIRING SCHEMATIC Two Compressors Unit - 27 -...
  • Page 28 TYPICAL WIRING SCHEMATIC - 28 -...
  • Page 29 TYPICAL WIRING SCHEMATIC - 29 -...
  • Page 30 TYPICAL WIRING SCHEMATIC - 30 -...
  • Page 31 TYPICAL WIRING SCHEMATIC - 31 -...

  • Page 32: Application Data

    This would enable the remainder of the base-cooling load to be handled by a separate chiller utilizing evaporator The Dunham-Bush Water Cooled Screw Flooded Chiller entering condensing water temperatures and greater can significantly reduce building operating costs when the energy efficiency.
  • Page 33 Dunham-Bush Water Cooled Chillers have as standard a Under these conditions, fan cycling might result in very control feature called EPCAS (Evaporator Pressure rapid temperature swings, which creates a dynamic Control at Start) which will allow for an inverted start.

  • Page 34: Equipment

    Standard Equipment And Factory Chilled water reset from control panel or external Installed Options building automation system. High oil temp, low oil level, freeze, low suction Dunham-Bush Water Cooled Screw Flooded Chillers, like pressure, high discharge pressure, and solid state many other Dunham-Bush...
  • Page 35 GUIDE SPECIFICATIONS 5. Evaporator and condenser vessels shall all be simple menu driven display screens, with on-line help cleanable shell and tube type with integral finned available by pressing a help button at anytime during copper water tubes mechanically expanded into heavy operation.

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