MODEL YK CENTRIFUGAL LIQUID CHILLER STYLE G

1 FORM (517). MODEL YK. CENTRIFUGAL LIQUID CHILLER . STYLE G. 250 THROUGH 3000 TONS. (879 through 10,500 kW). Utilizing HFC-134a Refrigerant FORM (517). Nomenclature YK ED ER Q7 - ES G S. MOTOR CODE. COMPRESSOR. EVAPORATOR CODE DESIGN LEVEL. CODE. POWER SUPPLY. - for 60Hz CONDENSER 5 for 50Hz CODE SPECIAL. 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. FORM (517). Table Of Contents 5. SUSTAINABILITY 9. EQUIPMENT 13. OPTIVIEW CONTROL 22. ACCESSORIES AND 30. APPLICATION 42. 76. 99. GUIDE 101.

2 SI METRIC 114. JOHNSON CONTROLS 3. FORM (517). THIS PAGE INTENTIONALLY LEFT BLANK. 4 JOHNSON CONTROLS. FORM (517). Introduction 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, com- pressor, and motor performance to achieve the lowest system kW/ton. YORK CHILLER tech- nology matches CHILLER system components to provide maximum CHILLER efficiency under actual not just theoretical operating conditions.

3 REAL-WORLD ENERGY PERFORMANCE. Johnson Controls pioneered the concept of Real-World Energy to illustrate the energy- saving potential of focusing on CHILLER performance during off-design conditions. Off-de- sign is not only part load, but full load operation as well, with reduced entering condenser water temperatures (ECWTs). This is where chillers operate 99% of the time, and where operating costs add up. The YORK YK chillers are the only chillers designed to operate on a continuous basis with cold ECWT and full condenser flow at all load points, taking full advantage of Real- World conditions.

4 This type of operation benefits the cooling tower as well by reducing the cycling of the fan motor and ensuring good coverage of the cooling fill. YORK YK chillers offer the most efficient Real-World operation of any CHILLER , meaning lower operating costs and an excellent return on your CHILLER investment. OPEN-DRIVE DESIGN. Hermetic motor burnout can cause catastrophic damage to a CHILLER . The entire CHILLER must be cleaned, and the refrigerant replaced. YORK YK CENTRIFUGAL chillers eliminate this risk by utilizing air-cooled motors. Refrigerant never comes in contact with the motor, preventing contamination of the rest of the CHILLER .

5 Insurance companies that offer policies on large air conditioning equipment often consider air-cooled motors a significant advantage over hermetic refrigerant-cooled units. HIGH EFFICIENCY HEAT EXCHANGERS. YORK YK CHILLER heat exchangers offer the latest technology in heat transfer surface de- sign to give you maximum efficiency and compact design. Waterside and refrigerant side design enhancements minimize both energy consumption and tube fouling. JOHNSON CONTROLS 5. FORM (517). 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 chill- ers incorporate single-stage compressor design.

6 With fewer moving parts and straight- forward, efficient engineering, YORK single-stage compressors have proven durability records in hospitals, chemical plants, gas processing plants, the Navy, and in other applications where minimal downtime is a crucial concern. In thousands of installations worldwide, YORK single-stage compressors are working to reduce energy costs. High strength aluminum-alloy compressor impellers feature back- ward curved vanes for high efficiency. Airfoil shaped pre rotation vanes minimize flow dis- ruption for the most efficient part load performance. Precisely positioned and tightly fitted, they allow the compressor to unload smoothly from 100% to minimum load for excellent operation in air conditioning applications.

7 AHRI CERTIFICATION PROGRAM. YORK YK chillers have been tested and certified by Air-Conditioning, Heating and Refrigeration Institute (AHRI) in accordance with the latest edition of AHRI Standard 550/590 (I-P). Under this Certification Program, chillers are regularly tested in strict compliance with this Standard. This provides an independent, third-party verification of CHILLER performance. Refer to the AHRI site at: chilling+packages+using+vap or+compression+cycle+ for complete Program Scope, Inclusions, and Exclusions as some options listed herein fall outside the scope of the AHRI certification program.

8 For verification of certification, go to the AHRI. Directory at PRECISION CONTROL OF COMPRESSOR OIL PRESSURE. Utilizing our expertise in variable speed drive technology and applications, Johnson Con- trols has moved beyond the fixed head and bypass approach of oil pressure control. The old approach only assures oil pressure at the outlet of the pump rather than at the com- pressor, and allows no adjustment during CHILLER operation. The YORK YK chillers feature a variable speed drive oil pump, monitoring and providing the right amount of oil flow to the compressor on a continuous basis. This design also provides sophisticated electronic monitoring and protection of the oil pump electrical supply, ensuring long life and reliable operation of the oil pump motor.

9 Variable speed drive technology reduces oil pump power consumption, running only at the speed required, rather than at full head with a pressure regulating bypass valve. 6 JOHNSON CONTROLS. FORM (517). Introduction (Cont'd). FACTORY PACKAGING REDUCES FIELD LABOR COSTS. YORK YK CENTRIFUGAL chillers are designed to keep installation costs low. Where instal- lation 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.

10 TAKE ADVANTAGE OF COLDER COOLING TOWER WATER TEMPERATURES. YORK YK CENTRIFUGAL chillers have been designed to take full advantage of colder cool- ing tower water temperatures, which are naturally available during most operating hours. Considerable energy savings are available by letting tower water temperature drop, rather than artificially holding it above 75 F ( C), especially at low load, as some chillers require. UL COMPLIANCE YOUR ASSURANCE OF RELIABILITY. YORK YK CENTRIFUGAL chillers are approved to UL Standard 1995 for listing by a qualified nationally recognized testing laboratory for the United States and Canada.