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MODEL YK CENTRIFUGAL LIQUID CHILLERS STYLE G
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MODEL YK CENTRIFUGAL LIQUID CHILLERS STYLE G - 1

MODEL YK CENTRIFUGAL LIQUID CHILLERS STYLE G 250 THROUGH 3000 TONS (879 through 10,500 kW) Utilizing HFC-134a

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MODEL YK CENTRIFUGAL LIQUID CHILLERS STYLE G - 2

MOTOR CODE COMPRESSOR CODE EVAPORATOR CODE DESIGN LEVEL POWER SUPPLY CONDENSER CODE UNIT TYPE YORK YK Centrifugal Chiller Approvals See CODES AND STANDARDS on page 21 for Approvals. Dimensions in this guide are English (SI) 2 JOHNSON CONTROLS

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JOHNSON CONTROLS

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THIS PAGE INTENTIONALLY LEFT BLANK. JOHNSON CONTROLS

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The YORK YK Chillers, manufactured by Johnson Controls, offer a complete combination of features for total owner satisfaction. MATCHED COMPONENTS MAXIMIZE EFFICIENCY Actual chiller efficiency cannot be determined by analyzing the theoretical efficiency of any one chiller component. It requires a specific combination of heat exchanger, compressor, and motor performance to achieve the lowest system kW/ton. YORK chiller technology matches chiller system components to provide maximum chiller efficiency under actual – not just theoretical – operating conditions. REAL-WORLD ENERGY PERFORMANCE...

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Introduction (Cont'd) SINGLE STAGE COMPRESSOR DESIGN AND EFFICIENCY PROVEN IN THE MOST DEMANDING APPLICATIONS Designed to be the most reliable chillers we’ve ever made, YORK YK centrifugal chillers incorporate single-stage compressor design. With fewer moving parts and straightforward, efficient engineering, YORK single-stage compressors have proven durability records in hospitals, chemical plants, gas processing plants, the U.S. Navy, and in other applications where minimal downtime is a crucial concern. In thousands of installations worldwide, YORK single-stage compressors are working to...

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Introduction (Cont'd) FACTORY PACKAGING REDUCES FIELD LABOR COSTS YORK YK centrifugal chillers are designed to keep installation costs low. Where installation access is not a problem, the unit can be shipped completely packaged, requiring minimal piping and wiring to complete the installation. For those units utilizing Variable Speed Drive or a factory-installed Solid-State Starter, the three power leads provide all power to the chiller and its auxiliaries. TAKE ADVANTAGE OF COLDER COOLING TOWER WATER TEMPERATURES YORK YK centrifugal chillers have been designed to take full advantage of...

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Introduction (Cont'd) OFF-DESIGN PERFORMANCE Since the vast majority of its operating hours are spent at off design conditions, a chiller should be chosen not only to meet the full load design, but also for its ability to perform efficiently at lower loads and lower tower water temperatures. It is not uncommon for chillers with the same full load kW/ton to have an operating cost difference of over 10% due to part load operation. Part load information can be easily and accurately generated by use of the computer. And because it is so important to an owner’s operating budget, this information...

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MODEL YK CENTRIFUGAL LIQUID CHILLERS STYLE G - 9

Sustainability Focus OZONE-DEPLETION POTENTIAL (ODP) The YORK YK chiller employs one the most environmentally friendly refrigerants available today, HFC-134a, with no Ozone Depletion Potential (ODP) and no phase out date per the Montreal Protocol. Ozone is a very small part of the atmosphere, but its presence is nevertheless vital to human well-being. Most ozone resides in the upper part of the atmosphere. This region, called the stratosphere, is more than 10 kilometers (6 miles) above the Earth’s surface. There, about 90% of atmospheric ozone is contained in the “ozone layer,” which...

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Sustainability Focus (Cont'd) Monitoring stations showed that ozone-depleting chemicals were steadily increasing in the atmosphere. These trends were linked to growing production and use of chemicals like chlorofluorocarbons (CFCs) for refrigeration and air conditioning, foam blowing, and industrial cleaning. Measurements in the laboratory and the atmosphere characterized the chemical reactions that were involved in ozone destruction. Computer models employing this information could predict how much ozone depletion was occurring and how much more could occur in the future. Observations of...

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MODEL YK CENTRIFUGAL LIQUID CHILLERS STYLE G - 11

Sustainability Focus (Cont'd) Figure 1 - USAGE OF HFC-134A GLOBAL WARMING POTENTIAL (GWP) Another main environmental topic is Global Warming potential (GWP), and when we talk about global warming we’re primarily talking about smoke stacks and tail pipes. 85% of GWP is attributed to CO2 emissions, while only about 2% is related to HFC’s. However, when we talk about the direct impact our YORK YK Centrifugal Chiller has on the environment we can make strides forward, like ensuring leak tight designs are created, and manufacturers are working to reduce refrigerant charges as much as possible....

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Sustainability Focus (Cont'd) DIRECT & INDIRECT GLOBAL WARMING POTENTIAL 98% of the global warming potential of a centrifugal chiller is from the indirect effect or the greenhouse gases produced to generate the electricity to run the chiller. The YORK YK centrifugal chiller and its superior efficiency levels dramatically reduces the indirect GWP. Two percent of the GWP is from the direct effect or release of the refrigerant gases into FIGURE 3 - DIRECT AND INDIRECT GLOBAL WARMING POTENTIAL Minimizing the total climatic impact (direct and indirect GWP) requires a comprehensive approach to...

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Equipment Overview YORK YK chillers are completely factory-packaged including the evaporator, condenser, compressor, motor, lubrication system, control center, and all interconnecting unit piping and wiring. The initial charge of refrigerant and oil is supplied for each chiller. When the optional condenser isolation valves are ordered, most units may ship fully charged with refrigerant and oil. Actual shipping procedures will depend on a number of project-specific details. The services of a Johnson Controls factory-trained, field service representative are incurred to supervise or perform...

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Equipment Overview (Cont'd) Oil is filtered by an externally mounted 1/2 micron replaceable cartridge oil filter equipped with service valves. Oil is cooled via a refrigerant-cooled oil cooler, eliminating the requirement for field water piping. The oil side of the oil cooler is provided with service valves. An automatic oil return system recovers any oil that may have migrated to the evaporator. Oil piping is completely factory-installed. WATER-COOLED OIL COOLER An optional condenser water-cooled oil cooler is offered for units with Q3 compressors C-D shells only. This oil cooler is a...

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