MODEL YD DUAL CENTRIFUGAL COMPRESSOR CHILLERS …

1 FORM (815) MODEL YD dual CENTRIFUGAL COMPRESSOR CHILLERS STYLE C1500 - 6000 Tons 5265 - 21096 kWUtilizing R-134aJOHNSON CONTROLSFORM (815)2 Approvals ASME Boiler and Pressure Vessel Code Section Vlll Division 1. AHRI Standard 550/590 (up to 3000 tons or 10,500 kW). UL 1995 Heating and Cooling Equipment. ASHRAE 15 Safety Code for Mechanical Refrigeration. ASHRAE Guideline 3 Reducing Emission of Halogenated Refrigerants in Refrigeration and Air-Conditioning Equipment and Systems. National Electrical Code. OSHA Occupational Safety and Health EB CD K3 - DA C SMODELEVAPORATOR CODEPOWER SUPPLY- = 60Hz5 = 50hZMOTORCODESPECIAL FEATURESCONDENSERCODECOMPRESSORCODEDESIG NLEVELFORM (815)JOHNSON CONTROLS3 Table Of ContentsINTRODUCTION.

2 5 SUSTAINABILITY FOCUS ..9 UNIT COMPONENTS ..12 EQUIPMENT OVERVIEW ..13 OPTIVIEW CONTROL CENTER ..18 STARTERS AND DRIVES ..29 ACCESSORIES AND MODIFICATIONS ..35 APPLICATION DATA ..37 ELECTRICAL CONSIDERATIONS ..50 DIMENSIONS ..60 ISOLATORS ..80 COMPONENT DIMENSIONS ..84 WEIGHTS ..87 GUIDE SPECIFICATIONS ..88SI METRIC CONVERSION ..104 JOHNSON CONTROLSFORM (815)4 THIS PAGE INTENTIONALLY LEFT (815)JOHNSON CONTROLS5 The YORK YD CHILLERS offer a complete combination of features for total owner satisfac-tion. The YD line of CHILLERS utilize two YORK CENTRIFUGAL compressors operating in parallel on a common set of heat exchanger shells to obtain large chiller capacities, and efficient part load COMPONENTS MAXIMIZE EFFICIENCYA ctual chiller efficiency cannot be determined by ana lyzing the theoretical efficiency of any one chiller com ponent.

3 It requires a specific combination of heat exchanger, COMPRESSOR , and motor performance to achieve the lowest system kW/ton. YORK YD chiller technology matches chiller system components to provide maximum chiller efficiency under actual not just theoretical operating WORLD ENERGY PERFORMANCEJ ohnson Controls pioneered the term Real World Energy to illustrate the energy saving potential of focusing on chiller performance during off design conditions. Off design is not only part load, but full load operation as well, with reduced entering condenser water tem-peratures (ECWTs).

4 This is where CHILLERS operate 99% of the time, and where operating costs add YD 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 condi-tions. This type of operation benefits the cooling tower as well; reducing cycling of the fan motor and ensuring good coverage of the cooling YD dual COMPRESSOR chiller provides further energy savings by running in single com-pressor mode at part loads of 50% and lower. The chiller operates more efficiently by run-ning with a single more fully loaded COMPRESSOR .

5 The two compressors share a common refrigerant circuit, thereby utilizing the full heat transfer surface available for part load single COMPRESSOR YD CHILLERS offer the most efficient Real World operation of any chiller , meaning lower operating costs and an excellent return on your chiller DRIVE DESIGNH ermetic-motor burnout can cause catastrophic dam age to a chiller . The entire chiller must be cleaned, and the refrigerant replaced. YORK YD 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 mo tors a significant advantage over hermetic refrigerant cooled YD chiller uses two motors, each roughly half the size of a motor used on an equivalent size single COMPRESSOR chiller .

6 By staggering the start of these motors, the starting in-rush current of each smaller motor is less (Electromechanical and Solid State Starter only). This IntroductionOff-design is not only part load, but full load operation as well, with reduced entering condenser water temperatures (ECWTs)JOHNSON CONTROLSFORM (815)6provides a lower burden on the building electrical system. Also, use of two smaller motors allows low voltage COMPRESSOR drive motors to be applied on larger CHILLERS . This can be an advantage for applications where medium voltage power sources are not HEAT EXCHANGERSYD chiller heat exchangers offer the latest tech nology in heat transfer surface design to give you maxi mum efficiency and compact design.

7 Waterside and refrigerant-side design enhancements minimize both energy consumption and tube COMPRESSOR DESIGN AND EFFICIENCY PROVEN IN THE MOST DEMANDING APPLICATIONSD esigned to be the most reliable CHILLERS we ve ever made, YORK YD CENTRIFUGAL CHILLERS incorporate single stage COMPRESSOR design. With fewer moving parts and straightforward, efficient engineering, YORK single stage compressors have proven durability records in the Navy, hospitals, chemical plants, gas processing plants, and in other applications where minimal downtime is a crucial thousands of installations worldwide, YORK single stage compressors are working to reduce energy costs.

8 High strength aluminum alloy COMPRESSOR impel lers feature back-ward-curved vanes for high efficiency. Airfoil shaped pre-rotation vanes minimize flow disrup tion for the most efficient part load performance. Pre cisely positioned and tightly fit-ted, they allow the COMPRESSOR to unload smoothly from 100% to minimum load for excellent operation in air conditioning 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.

9 The old approach only assures oil pressure at the outlet of the pump rather than at the compres-sor, and allows no adjustment during chiller operation. The YD CHILLERS feature two variable speed drive oil pumps, monitoring and providing the right amount of oil flow to each com-pressor on a continuous basis. This design also provides sophisticated electronic monitor-ing 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 consump-tion, running only at the speed required, rather than at full head with a pressure regulating bypass PACKAGING REDUCES FIELD LABOR COSTSYORK YD CENTRIFUGAL CHILLERS are designed to keep installation costs low.

10 Where installation access is not a problem, the K1 and K2 COMPRESSOR size YD dual COMPRESSOR CHILLERS may be shipped completely packaged. In order to save on shipping and rigging costs, larger K3 to K7 COMPRESSOR size units are disassembled into four major components: two drivelines, the evaporator, and the condenser. Piping break points are flanged, and wiring connections are simple plug connections to ensure a simple chiller commissioning utilizing a Variable Speed Drive or a factory-installed Solid-State (Cont'd)The YD CHILLERS feature two variable speed drive oil pumps, moni-toring and providing the right amount of oil flow to each compres-sor on a continuous (815)JOHNSON CONTROLS7 AHRI CERTIFICATION PROGRAM YORK YD CHILLERS have been tested and certified by Air- Conditioning, Heating and Refrig-eration Institute (AHRI)