Process Chillers Overview

Process chillers (or fluid chillers) have many commercial applications. In basic terms, a process chiller removes heat from fluid and transports that heat (energy) from a location that is not wanted to another more appropriate location. A good example of this would be an MRI or PET medical imaging system. When in operation, these systems can generate significant amounts of heat energy. If this energy is not removed quickly, these important medical diagnostic tools will cease to operate. 

Unlike standard duty chillers, used for air conditioning or comfort cooling, process chillers are specially engineered for mission critical applications as explained in the example above. A process chiller (or fluid chiller) must contain specially designed components for reliable operation in extreme conditions. Each component must be selected for 24/7/365 service duty. Furthermore, in many mission critical process chiller applications, accuracy of the delivered fluid temperature is paramount as many mission critical applications can not tolerate variances in supply fluid temperatures. 


Process Chiller Markets

Below, you will find the most common applications for fluid process chillers. This is by no means is a complete listing. If you don't see your specific application within the listings below, and you feel your application falls within the Process Chiller application environment indicated in the overview above, Please contact Legacy's engineering department for assistance at your earliest opportunity. 

Commercial, Industrial Process Chiller Applications

  • Custom OEM
  • Jacket Cooling 
  • Print Processes
  • Injection Molding
  • Plating Process
  • Data Centers
  • Telecommunications
  • Custom Low Temp
  • Welding Machines
  • Pharmaceuticals
  • Semiconductor Testing
  • Storage Tank Cooling
  • Laser - Private Sector 
  • Lasers - Military Sector
  • Agriculture

Medical & Pharmaceutical Applications

  • MRI Magnet Cooling
  • PET scanner Cooling
  • CAT Scanner Cooling
  • Operating Room Cooling
  • Lab testing Systems
  • Induced Hypothermia Systems

Food & Beverage Industry Applications

  • Bakery Processing
  • Craft Brew Cooling 
  • Distilled Sprit Production
  • Commercial Ice Production
  • Pasturization Cooling
  • Custom Batch Cooling

Process Chillers Types

The first step in determining the type of process (or fluid) chiller you need for your application it to determine how your chiller will reject the heat it has absorbed from the process. Below, are the two most common process chiller system types that represent over 98% of the market. 

Air-cooled process chiller: As the name indicates, an air-cooled process chiller will reject process heat to the air. Typically these chillers are located outdoors thus transporting heat to the outside air. 

Water-cooled process chiller: As the name indicates, a water-cooled process chiller will reject process heat to another fluid based medium. In most cases, heat rejection by water-cooled process chiller will go to an outdoor located evaporative cooling tower.

For more detailed information on types of process chillers and their applications, have a look at our Learn Process Chiller Basics page or request a copy of our Process Chiller Buyers Guide


Process Chiller Selection

Air-cooled Process Chillers, Packaged, Single Stage Scroll, Tankless

Model No.Cooling CapacityLength InchesWidth InchesHeight InchesWeight LBSSubmittal Download
PZA1S 14,200 BTUH 36.0 34.0 44.0 260.0 PDF
PZA1.5S 21,500 BTUH 36.0 34.0 44.0 265.0 PDF
PZA2S 24,100 BTUH 36.0 34.0 44.0 265.0 PDF
PZA2.5S 34,800 BTUH 36.0 34.0 44.0 295.0 PDF
PZA3S 39,200 BTUH 36.0 34.0 48.0 490.0 PDF
PZA4S 50,000 BTUH 46.0 34.0 48.0 490.0 PDF
PZA4.5S 54,000 BTUH 46.0 34.0 48.0 500.0 PDF
PZA5S 60,000 BTUH 46.0 34.0 48.0 500.0 PDF
PZA7S 81,000 BTUH 75.0 34.0 48.0 650.0 PDF
PZA8S 91,000 BTUH 75.0 34.0 48.0 650.0 PDF
PZA9S 106,000 BTUH 75.0 34.0 48.0 690.0 PDF
PZA11S 132,000 BTUH 75.0 34.0 48.0 875.0 PDF

Air-cooled Process Chillers, Packaged, Dual Stage Scroll, Tankless

Model No.Cooling CapacityLength InchesWidth InchesHeight InchesWeight LBSSubmittal Download
PZA7D 80,100 BTUH 75.0 34.0 48.0 875.0 PDF
PZA9D 106,400 BTUH 75.0 34.0 48.0 900.0 PDF
PZA9.5D 111,800 BTUH 75.0 34.0 48.0 950.0 PDF
PZA10D 118,000 BTUH 75.0 34.0 48.0 950.0 PDF
PZA13D 160,000 BTUH 85.0 40.0 49.0 985.0 PDF
PZA15D 183,500 BTUH 85.0 40.0 49.0 1000.0 PDF
PZA18D 209,200 BTUH 85.0 40.0 49.0 1100.0 PDF
PZA22D 264,200 BTUH 66.0 75.0 51.0 1150.0 PDF
PZA26D 302,000 BTUH 180.0 46.0 54.0 2600.0 PDF
PZA35D 406,000 BTUH 180.0 88.0 54.0 2900.0 PDF
PZA43D 500,000 BTUH 180.0 88.0 54.0 3200.0 PDF
PZA52D 612,000 BTUH 180.0 88.0 54.0 4000.0 PDF

Air-cooled Process Chillers, Split-system, Single Stage Scroll, Tankless

Model No.Cooling CapacityLength InchesWidth InchesHeight InchesWeight LBSSubmittal Download
IEZA1S 14,200 BTUH 44.0 28.0 36.0 225.0 PDF
IEZA1.5S 21,500 BTUH 44.0 28.0 36.0 225.0 PDF
IEZA2S 24,100 BTUH 44.0 28.0 36.0 370.0 PDF
IEZA2.5S 34,800 BTUH 44.0 28.0 36.0 500.0 PDF
IEZA3S 39,200 BTUH 44.0 28.0 36.0 500.0 PDF
IEZA4S 50,000 BTUH 44.0 28.0 36.0 550.0 PDF
IEZA4.5S 54,000 BTUH 44.0 28.0 36.0 575.0 PDF
IEZA5S 60,000 BTUH 44.0 28.0 36.0 600.0 PDF
IEZA7S 81,000 BTUH 44.0 28.0 36.0 700.0 PDF
IEZA8S 91,000 BTUH 44.0 28.0 36.0 725.0 PDF
IEZA9S 106,000 BTUH 44.0 28.0 36.0 750.0 PDF
IEZA11S 132,000 BTUH 44.0 28.0 36.0 850.0 PDF

Air-cooled Process Chillers, Split-system, Dual Stage Scroll, Tankless

Model No.Cooling CapacityLength InchesWidth InchesHeight InchesWeight LBSSubmittal Download
IEZA7D 80,100 BTUH 65.0 30.0 37.0 900.0 PDF
IEZA9D 106,400 BTUH 65.0 30.0 37.0 1000.0 PDF
IEZA9.5D 111,800 BTUH 65.0 30.0 37.0 1100.0 PDF
IEZA10D 118,000 BTUH 65.0 30.0 37.0 1200.0 PDF
IEZA13D 160,000 BTUH 65.0 30.0 37.0 1400.0 PDF
IEZA15D 183,500 BTUH 65.0 30.0 37.0 1450.0 PDF
IEZA18D 209,200 BTUH 65.0 30.0 37.0 1500.0 PDF
IEZA22D 264,200 BTUH 65.0 30.0 37.0 1750.0 PDF
IEZA26D 302,000 BTUH 85.0 34.0 42.0 1500.0 PDF
IEZA35D 406,000 BTUH 85.0 34.0 42.0 1600.0 PDF
IEZA43D 500,000 BTUH 85.0 34.0 42.0 1700.0 PDF
IEZA52D 612,000 BTUH 85.0 34.0 42.0 1700.0 PDF

Air-cooled Process Chillers, Packaged, Single Stage Scroll, with Tank

Model No.Cooling CapacityLength InchesWidth InchesHeight InchesWeight LBSSubmittal Download
PZAT1S 14,000 BTUH 36.0 34.0 68.0 550.0 PDF
PZAT1.5S 18,000 BTUH 36.0 34.0 68.0 600.0 PDF
PZAT2S 22,000 BTUH 36.0 34.0 68.0 650.0 PDF
PZAT2.5S 28,800 BTUH 36.0 34.0 68.0 700.0 PDF
PZAT3S 36,000 BTUH 46.0 34.0 72.0 800.0 PDF
PZAT4S 49,200 BTUH 46.0 34.0 72.0 850.0 PDF
PZAT4.5S 51,600 BTUH 46.0 34.0 72.0 875.0 PDF
PZAT5S 55,200 BTUH 46.0 34.0 72.0 900.0 PDF
PZAT7S 75,600 BTUH 75.0 34.0 72.0 1100.0 PDF
PZAT8S 84,000 BTUH 75.0 34.0 72.0 1150.0 PDF
PZAT9S 98,400 BTUH 75.0 34.0 72.0 1250.0 PDF
PZAT11S 112,400 BTUH 75.0 34.0 72.0 1300.0 PDF

Air-cooled Process Chillers, Packaged, Dual Stage Scroll, with Tank

Model No.Cooling CapacityLength InchesWidth InchesHeight InchesWeight LBSSubmittal Download
PZAT7D 73,200 BTUH 75.0 34.0 77.0 1100.0 PDF
PZAT9D 96,000 BTUH 75.0 34.0 77.0 1200.0 PDF
PZAT9.5D 102,000 BTUH 75.0 34.0 77.0 1250.0 PDF
PZAT10D 108,000 BTUH 75.0 34.0 77.0 1250.0 PDF
PZAT13D 147,000 BTUH 85.0 40.0 77.0 1300.0 PDF
PZAT15D 167,000 BTUH 85.0 40.0 77.0 1400.0 PDF
PZAT18D 190,800 BTUH 85.0 40.0 77.0 1450.0 PDF
PZA22D 264,200 BTUH 66.0 75.0 51.0 1150.0 PDF
PZA26D 302,000 BTUH 180.0 46.0 54.0 2600.0 PDF
PZA35D 406,000 BTUH 180.0 88.0 54.0 2900.0 PDF
PZA43D 500,000 BTUH 180.0 88.0 54.0 3200.0 PDF

Air-cooled Process Chillers, Split-system, Single Stage Scroll, with Tank

Model No.Cooling CapacityLength InchesWidth InchesHeight InchesWeight LBSSubmittal Download
IEZAT1S 14,000 BTUH 36.0 34.0 65.0 550.0 PDF
IEZAT1.5S 18,000 BTUH 36.0 34.0 65.0 600.0 PDF
IEZAT2S 22,000 BTUH 36.0 34.0 65.0 650.0 PDF
IEZAT2.5S 28,800 BTUH 36.0 34.0 65.0 700.0 PDF
IEZAT3S 36,000 BTUH 36.0 34.0 65.0 800.0 PDF
IEZAT4S 49,200 BTUH 46.0 34.0 68.5 850.0 PDF
IEZAT4.5S 51,600 BTUH 46.0 34.0 68.5 875.0 PDF
IEZAT5S 55,200 BTUH 46.0 34.0 68.5 900.0 PDF
IEZAT7S 75,600 BTUH 75.0 34.0 68.5 1100.0 PDF
IEZAT8S 84,000 BTUH 75.0 34.0 70.0 1150.0 PDF
IEZAT9S 98,400 BTUH 75.0 34.0 70.0 1250.0 PDF
IEZAT11S 122,400 BTUH 75.0 34.0 70.0 1300.0 PDF

Air-cooled Process Chillers, Split-system, Dual Stage Scroll, with Tank

Model No.Cooling CapacityLength InchesWidth InchesHeight InchesWeight LBSSubmittal Download
IEZAT7D 73,200 BTUH 75.0 34.0 70.0 1350.0 PDF
IEZAT9D 96,000 BTUH 75.0 34.0 70.0 1400.0 PDF
IEZAT9.5D 102,000 BTUH 75.0 34.0 70.0 1450.0 PDF
IEZAT10D 108,000 BTUH 75.0 34.0 70.0 1500.0 PDF
IEZAT13D 147,000 BTUH 75.0 34.0 70.0 1700.0 PDF
IEZAT15D 167,000 BTUH 75.0 34.0 70.0 1800.0 PDF
IEZAT18D 190,800 BTUH 85.0 34.0 70.0 1900.0 PDF
IEZAT22D 238,800 BTUH 85.0 34.0 70.0 2100.0 PDF
IEZA26D 302,000 BTUH 85.0 34.0 42.0 1500.0 PDF
IEZA35D 406,000 BTUH 85.0 34.0 42.0 1600.0 PDF
IEZA43D 500,000 BTUH 85.0 34.0 42.0 1700.0 PDF

Air-cooled Process Chillers, Packaged, Single Stage Scroll, with Poly Tank

Model No.Cooling CapacityLength InchesWidth InchesHeight InchesWeight LBSSubmittal Download
PZAPT1S 16,800 BTUH 36.0 34.0 49.0 350.0 PDF
PZAPT2S 26,400 BTUH 36.0 34.0 49.0 425.0 PDF
PZAPT2.5S 36,000 BTUH 36.0 34.0 49.0 475.0 PDF
PZAPT3S 38,400 BTUH 46.0 34.0 55.0 425.0 PDF
PZAPT4S 43,200 BTUH 46.0 34.0 55.0 525.0 PDF
PZAPT5S 58,800 BTUH 46.0 34.0 55.0 575.0 PDF
PZAPT7S 91,200 BTUH 75.0 34.0 55.0 700.0 PDF
PZAPT8S 102,000 BTUH 75.0 34.0 55.0 700.0 PDF
PZAPT9S 117,600 BTUH 75.0 34.0 55.0 750.0 PDF
PZAPT11S 123,600 BTUH 75.0 34.0 55.0 875.0 PDF

Air-cooled Process Chillers, Packaged, Dual Stage Semi-hermetic, Tankless

Model No.Cooling CapacityLength InchesWidth InchesHeight InchesWeight LBSSubmittal Download
PSA16D 188,400 BTUH 180.0 45.0 55.0 1700.0 PDF
PSA19D 222,000 BTUH 180.0 45.0 55.0 2000.0 PDF
PSA22D 265,200 BTUH 180.0 45.0 55.0 2100.0 PDF
PSA25D 300,000 BTUH 232.0 45.0 55.0 2500.0 PDF
PSA33D 392,400 BTUH 180.0 89.0 55.0 2800.0 PDF
PSA37D 446,400 BTUH 180.0 89.0 55.0 2800.0 PDF
PSA45D 550,000 BTUH 180.0 89.0 55.0 4800.0 PDF
PSA55D 652,000 BTUH 232.0 89.0 57.0 5500.0 PDF
PSA62D 740,000 BTUH 232.0 89.0 57.0 5600.0 PDF
PSA71D 856,000 BTUH 232.0 89.0 57.0 6000.0 PDF
PSA88D 1,054,000 BTUH 232.0 89.0 57.0 6100.0 PDF

Air-cooled Process Chillers, Split-system, Dual Stage Semi-hermetic, Tankless

Model No.Cooling CapacityLength InchesWidth InchesHeight InchesWeight LBSSubmittal Download
IESA16D 188,400 BTUH 85.0 34.0 45.0 1050.0 PDF
IESA19D 222,000 BTUH 85.0 34.0 45.0 1100.0 PDF
IESA22D 265,200 BTUH 85.0 34.0 62.0 1200.0 PDF
IESA25D 300,000 BTUH 85.0 34.0 62.0 1400.0 PDF
IESA33D 392,400 BTUH 85.0 34.0 62.0 1600.0 PDF
IESA37D 446,400 BTUH 85.0 34.0 62.0 1700.0 PDF
IESA45D 550,000 BTUH 110.0 34.0 62.0 1800.0 PDF
IESA55D 652,000 BTUH 110.0 34.0 62.0 1900.0 PDF
IESA62D 740,000 BTUH 110.0 34.0 62.0 2200.0 PDF
IESA71D 856,000 BTUH 120.0 34.0 68.0 2500.0 PDF
IESA88D 1,054,000 BTUH 120.0 34.0 68.0 2800.0 PDF

Air-cooled process chiller capacities based on ARI standard 45 °F LWT and 95 °F AMB.

Water-cooled Process Chillers, Packaged, Single Stage Scroll, Tankless

Model No.Cooling CapacityLength InchesWidth InchesHeight InchesWeight LBSSubmittal Download
PZW1S 12,700 BTUH 36.0 34.0 36.0 260.0 PDF
PZW1.5S 20,100 BTUH 36.0 34.0 36.0 265.0 PDF
PZW2S 23,300 BTUH 36.0 34.0 36.0 265.0 PDF
PZW2.5S 35,799 BTUH 36.0 34.0 36.0 295.0 PDF
PZW3S 42,100 BTUH 36.0 34.0 36.0 490.0 PDF
PZW4S 51,500 BTUH 46.0 34.0 36.0 490.0 PDF
PZW4.5S 53,500 BTUH 46.0 34.0 36.0 500.0 PDF
PZW5S 62,700 BTUH 46.0 34.0 36.0 500.0 PDF
PZW7S 81,600 BTUH 46.0 34.0 36.0 650.0 PDF
PZW8S 92,400 BTUH 46.0 34.0 36.0 650.0 PDF
PZW9S 108,500 BTUH 46.0 34.0 36.0 690.0 PDF
PZW11S 138,500 BTUH 46.0 34.0 36.0 750.0 PDF

Water-cooled Process Chillers, Packaged, Dual Stage Scroll, Tankless

Model No.Cooling CapacityLength InchesWidth InchesHeight InchesWeight LBSSubmittal Download
PZW7D 84,200 BTUH 65.0 34.0 36.0 875.0 PDF
PZW9D 103,000 BTUH 65.0 34.0 36.0 900.0 PDF
PZW9.5D 107,000 BTUH 65.0 34.0 36.0 950.0 PDF
PZW10D 125,400 BTUH 65.0 34.0 36.0 950.0 PDF
PZW13D 163,200 BTUH 75.0 34.0 36.0 985.0 PDF
PZW15D 184,800 BTUH 75.0 34.0 36.0 1000.0 PDF
PZW18D 217,000 BTUH 75.0 34.0 36.0 1000.0 PDF
PZW22D 277,000 BTUH 75.0 34.0 36.0 1150.0 PDF
PZW26D 326,250 BTUH 85.0 34.0 59.0 2600.0 PDF
PZW35D 460,000 BTUH 85.0 34.0 59.0 2900.0 PDF
PZW43D 556,000 BTUH 100.0 34.0 59.0 3200.0 PDF
PZW52D 633,000 BTUH 100.0 34.0 59.0 4000.0 PDF

Water cooled capacities based on ARI standard 45 °F LWT and 105 °F Condensing.

Water-cooled Process Chillers, Packaged, Single Stage Scroll, with Tank

Model No.Cooling CapacityLength InchesWidth InchesHeight InchesWeight LBSSubmittal Download
PZWT1S 12,100 BTUH 36.0 34.0 64.5 550.0 PDF
PZWT1.5S 19,200 BTUH 36.0 34.0 64.5 600.0 PDF
PZWT2S 22,200 BTUH 36.0 34.0 64.5 650.0 PDF
PZWT2.5S 34,300 BTUH 36.0 34.0 64.5 700.0 PDF
PZWT3S 40,300 BTUH 36.0 34.0 64.5 800.0 PDF
PZWT4S 49,300 BTUH 46.0 34.0 69.0 850.0 PDF
PZWT4.5S 52,000 BTUH 46.0 34.0 69.0 875.0 PDF
PZWT5S 60,100 BTUH 46.0 34.0 69.0 900.0 PDF
PZWT7S 78,200 BTUH 46.0 34.0 65.0 1100.0 PDF
PZWT8S 88,500 BTUH 75.0 34.0 70.0 1150.0 PDF
PZWT9S 104,000 BTUH 75.0 34.0 70.0 1250.0 PDF
PZWT11S 129,500 BTUH 75.0 34.0 70.0 1300.0 PDF

Water-cooled Process Chillers, Packaged, Dual Stage Scroll, with Tank

Model No.Cooling CapacityLength InchesWidth InchesHeight InchesWeight LBSSubmittal Download
PZWT7D 80,600 BTUH 75.0 34.0 70.0 1350.0 PDF
PZWT9D 98,600 BTUH 75.0 34.0 70.0 1400.0 PDF
PZWT9.5D 104,000 BTUH 75.0 34.0 70.0 1450.0 PDF
PZWT10D 120,200 BTUH 75.0 34.0 70.0 1500.0 PDF
PZWT13D 156,400 BTUH 75.0 34.0 70.0 1700.0 PDF
PZWT15D 177,000 BTUH 85.0 34.0 70.0 1800.0 PDF
PZWT18D 208,000 BTUH 85.0 34.0 70.0 1900.0 PDF
PZWT22D 259,000 BTUH 85.0 34.0 70.0 2100.0 PDF
PZW26D 326,250 BTUH 85.0 34.0 59.0 2600.0 PDF
PZW35D 460,000 BTUH 85.0 34.0 59.0 2900.0 PDF
PZW43D 556,000 BTUH 100.0 34.0 59.0 3200.0 PDF

Water-cooled Process Chillers, Packaged, Dual Stage Semi-hermetic, with Tank

Model No.Cooling CapacityLength InchesWidth InchesHeight InchesWeight LBSSubmittal Download
PSW16D 210,000 BTUH 85.0 34.0 70.0 1240.0 Call Factory
PSW19D 249,000 BTUH 85.0 34.0 70.0 1320.0 Call Factory
PSW22D 308,000 BTUH 85.0 34.0 75.0 1410.0 Call Factory
PSW25D 320,000 BTUH 85.0 34.0 75.0 1790.0 Call Factory
PSW33D 422,000 BTUH 85.0 34.0 75.0 1960.0 Call Factory
PSW37D 484,000 BTUH 85.0 34.0 75.0 2120.0 Call Factory
PSW45D 600,000 BTUH 110.0 34.0 75.0 2240.0 Call Factory
PSW55D 694,000 BTUH 110.0 34.0 75.0 2490.0 Call Factory
PSW62D 866,000 BTUH 110.0 34.0 75.0 2870.0 Call Factory
PSW71D 936,000 BTUH 120.0 34.0 78.0 3355.0 Call Factory
PSW88D 1,128,000 BTUH 120.0 34.0 78.0 3815.0 Call Factory

Water cooled capacities based on ARI standard 45 °F LWT and 105 °F Condensing.

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