MODEL YK CENTRIFUGAL LIQUID CHILLERS STYLE H

1 FORM (819) MODEL YK CENTRIFUGAL LIQUID CHILLERSSTYLE H250 through 3000 Tons(5274 through 10,500 kW)Utilizing R-134a or R-513 AJOHNSON CONTROLSFORM (819)2 ApprovalsSee Codes and Standards on page CODE YK 6B 4S Q7 - ES H SMOTOR CODEPOWER SUPPLY- for 60 Hz5 for 50 HzM for 50 Hz Supply / 60 Hz MotorDESIGN LEVELCONDENSER CODEEVAPORATOR CODEUNIT TYPE YORK YK CENTRIFUGAL ChillerSPECIALD imensions shown in this manual are in English, (SI) where (819)JOHNSON CONTROLS3 Table Of ContentsINTRODUCTION ..5 EQUIPMENT OVERVIEW ..9 OPTIVIEW CONTROL CENTER ..19 STARTERS AND DRIVES ..27 ACCESSORIES AND MODIFICATIONS.

2 35 APPLICATION DATA ..39 WEIGHTS ..68 GUIDE SPECIFICATIONS ..71 METRIC (SI) CONVERSION ..84 JOHNSON CONTROLS4 FORM (619)THIS PAGE INTENTIONALLY LEFT (819)JOHNSON CONTROLS5 YORK YK CHILLERS , manufactured by Johnson Controls, offer a complete combination of features for total owner COMPONENTS MAXIMIZE EFFICIENCYA ctual chiller efficiency cannot be determined by analyzing the theoretical efficiency of any one chiller component. It requires a specific combination of heat exchanger, compres-sor, 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 ENERGY PERFORMANCEJ ohnson Controls pioneered the concept of Real-World Energy to illustrate the energy-saving potential of focusing on chiller performance during off-design conditions.

3 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 CENTRIFUGAL 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. 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 tower CENTRIFUGAL CHILLERS offer the most efficient Real-world operation of any chiller, meaning lower operating costs and an excellent return on your chiller DESIGNH ermetic motor burnout can cause catastrophic damage to a chiller.

4 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 companies that offer policies on large air conditioning equipment often consider air-cooled motors a significant advantage over hermetic refrigerant-cooled EFFICIENCY HEAT EXCHANGERSYORK 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 CONTROLSFORM (819)6 SINGLE STAGE COMPRESSOR DESIGN AND EFFICIENCY PROVEN IN THE MOST DEMANDING APPLICATIONSD esigned to be the most reliable CHILLERS we ve ever made, YORK YK CENTRIFUGAL chill-ers incorporate single-stage compressor design.

5 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 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 CERTIFICATION PROGRAMYORK YK CHILLERS have been tested and certified by the Air-Conditioning, Heating and Refrigeration Institute (AHRI) in accordance with the latest edition of AHRI Standard 550/590 (I-P).

6 Under this Certification Program, CHILLERS are regularly tested in strict com-pliance with this Standard. This provides an independent, third-party verification of chiller performance. Refer to the AHRI site at: for complete Pro-gram Scope, Inclusions, and Exclusions as some options listed herein fall outside the scope of the AHRI certification program. For verification of certification, go to the AHRI Directory at CONTROL OF COMPRESSOR OIL PRESSUREU tilizing 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.

7 The old approach only assures oil pressure at the outlet of the pump rather than at the compressor, and allows no adjustment during chiller operation. 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. 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 (Cont'd)FORM (819)JOHNSON CONTROLS7 Introduction (Cont'd)FACTORY PACKAGING REDUCES FIELD LABOR COSTSYORK YK CENTRIFUGAL CHILLERS are designed to keep installation costs low.

8 Where instal-lation access is not a problem, the unit can be shipped completely packaged, requiring minimal piping and wiring to complete the 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 ADVANTAGE OF COLDER COOLING TOWER WATER TEMPERATURESYORK 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 COMPLIANCE YOUR ASSURANCE OF RELIABILITYYORK YK CENTRIFUGAL CHILLERS are approved to UL Standard 1995 for listing by a qualified nationally recognized testing laboratory for the United States and Canada.

9 Recognition of safety and reliability is your assurance of trouble free performance in day to-day building chiller options or modifications may affect the UL compliance of the chiller. Some examples include: special motor enclosures (like TEFC, TEWAC, or TEAAC) or special panels (NEMA 4X) or special unit wiring options (anything other than NEMA 1). For further clarification, contact Johnson Controls Application PERFORMANCE RATINGSEach chiller is custom matched to meet the individual building load and energy require-ments. A large number of standard heat exchangers and pass arrangements are available to provide the best possible is not practical to provide tabulated performance for each combination, as the energy requirements at both full and part load vary significantly with each heat exchanger and pass arrangement.

10 Computerized ratings are available through each Johnson Controls Sales Office. These ratings can be tailored to specific job requirements, and are part of the AHRI Certification CONTROLSFORM (819)8 OFF-DESIGN PERFORMANCES ince 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 chill-ers with the same full load kW/ton to have an operating cost difference of over 10% due to part load load information can be easily and accurately generated by use of the computer.