Model YR Twin-Screw Compressor Liquid Chillers Design …

1 FORM (511) Model YR Twin-Screw Compressor Liquid ChillersDesign Level C200 through 430 tons (60 Hz)700 through 1500 kW (50 Hz)170 through 365 tons (50 Hz) 600 through 1280 kW (50 Hz)Utilizing CONTROLSFORM (511)NOMENCLATUREThe Model number denotes the following characteristics of the unit: YR TD TD T0 46 C SModelEvaporator CodeDesign LevelPower Supply: for 60 Hz 5 for 50 HzCondenser CodeCompressor CodeMotor CodeSpecial Features(optional)Table of ContentsContentsFORM (511) ..1 Introduction.

2 3 Ratings ..4 optiview control center ..5 Mechanical Specifications ..12 Accessories and Modifications ..17SI Metric Conversion ..19 Application Data ..20 Unit Components ..26 Dimensions ..28 Dimensions ( ) Nozzle Arrangements ..30 Dimensions (mm) Nozzle Arrangements ..36 Dimensions (inches) Floor Layout ..42 Dimensions (mm) Floor Layout ..43 Weights ..45 Guide Specifications ..473 FORM (511)JOHNSON CONTROLSI ntroductionThe YORK MaxE YR chiller offers a complete combina-tion of features for total owner 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 op-timized system performance (IPLV/NPLV). YORK MaxE chiller technology matches chiller system components to provide maximum chiller efficiency under actual not just theoretical operating ENERGY PERFORMANCE Real-World Energy illustrates the energy-saving poten-tial 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 temperatures (ECWTs).

4 This is where Chillers operate 99% of the time, and where operating costs add YR MaxE Chillers are the only screw Chillers designed to operate on a continuous basis with reduced ECWT and full condenser flow at all load points, taking full advantage of Real-World weather conditions. This type of operation benefits the cooling tower as well; reducing cycling of the fan motor and ensuring good coverage of the cooling MaxE Chillers offer the most efficient Real-World operation of any chiller , meaning lower operating costs and an excellent return on your chiller OIL SEPARATORMaxE YR screw Chillers utilize high-efficiency oil sepa-ration, limiting oil carry-over to less than 500 ppm.

5 Oil is vital in screw compressors for lubrication, rotor sealing and cooling. However, oil in the evaporator can lead to reduced heat transfer and reduced system performance. The high-efficiency oil separator keeps the oil in the lube circuit and maximizes heat transfer HEAT EXCHANGERSMaxE chiller heat exchangers offer the latest tech nology in heat transfer surface Design to give you maxi mum efficiency and compact Design . Waterside and refriger-ant -side Design enhancements minimize both energy consumption and tube fouling.

6 The skip-fin Design at all intermediate tube supports provides maximum tube wall thickness at the support area to extend tube PACKAGING REDUCES FIELD LABOR COSTSYORK MaxE screw Chillers are designed to keep in-stallation costs low. Where installation access is not a problem, the unit can be shipped completely packaged, requiring minimal piping and wiring to complete the those units utilizing a factory installed Solid-State Starter, the three power leads pro vide all power to the chiller and its ADVANTAGE OF COLDER COOLING TOWER WATER TEMPERATURESYORK MaxE screw Chillers are de signed to take full advantage of colder cooling tower water temperatures, which are naturally available dur ing most operating hours.

7 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 PARTY ACCEPTANCE YOUR ASSURANCE OF RELIABILITYYORK MaxE screw Chillers are approved for listing by Underwriter s Laboratories for the United States and Canada. CE certification required for European Union, and SELO for mainland China requirements. Recogni-tion of safety and reliability is your assurance of trouble- free performance in day-to -day building CONTROLSFORM (511)RatingsAHRI CERTIFICATION PROGRAMThe performance of YORK MaxE Chillers is certified to the Air Conditioning, Heating, and Refrigeration Insti tute (ARI) complying with the certification sections of the latest issue of AHRI Standard 550/590.

8 Under this Certifi cation Program, Chillers are regularly tested in strict compli-ance with this Standard. This provides an inde pendent, third-party verification of chiller YR screw Chillers are designed to comply with ASHRAE Standard (and earlier editions). The superior part-load performance of the YORK YR Chillers far exceeds the IPLV/NPLV requirements of ASHRAE , providing superior Real World Energy savings for efficiency conscious owners. COMPUTERIZED PERFORMANCE RATINGSEach chiller is custom-matched to meet the individual building load and energy requirements.

9 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. Computerized ratings are available through each Johnson Controls sales office. These ratings can be tailored to specific job requirements, and are part of the ARI Certification 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.

10 It is not uncommon for Chillers with the same full-load kW/TON to have an operating cost differ-ence of over 10% due to part-load -load information can be easily and accurately gener-ated by computer. And because it is so important to an owner s operating budget, this informa tion is now standard within the AHRI Certifi cation Program in the form of an Integrated Part-Load Value (IPLV), and Non-Standard Part-Load Value (NPLV).The IPLV / NPLV formulas from AHRI Standard 550/590 closely track chiller operations, and provide a more ac-curate indication of chiller performance than the previ-ous IPLV / APLV formula.