York YR manual Introduction

Introduction

FORM 160.81-EG1

The YORK MAXE YR Chiller offers a complete combina- tion of features for total owner satisfaction.

MATCHED COMPONENTS MAXIMIZE EFFICIENCY

Actual chiller efficiency cannot be determined by ana- lyzing the theoretical efficiency of any one chiller com- ponent. It requires a specific combination of heat ex- changer, compressor, and motor performance to achieve the lowest system IPLV/NPLV. YORK MAXE chiller tech- nology matches chiller system components to provide maximum chiller efficiency under actual – not just theo- retical – operating conditions.

REAL-WORLD ENERGY PERFORMANCE

YORK pioneered the term “Real-World Energy” to il- lustrate 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 temperatures (ECWTs). This is where chillers operate 99% of the time, and where operating costs add up.

The YR MAXE 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; reducing cycling of the fan motor and ensuring good coverage of the cooling fill.

YORK MAXE chillers offer the most efficient Real-World operation of any chiller, meaning lower operating costs and an excellent return on your chiller investment.

HIGH-EFFICIENCY OIL SEPARATOR

MAXE YR Screw Chillers utilize high-efficiency oil sepa- ration, limiting oil carry-over to less than 500 ppm. Oil is vital in screw compressors for lubrication, rotor seal- ing and cooling. However, oil in the evaporator can lead to reduced heat transfer and reduced system perfor- mance. The high-efficiency oil separator keeps the oil in the lube circuit and maximizes heat transfer efficiency.

HIGH-EFFICIENCY HEAT EXCHANGERS

MAXE chiller heat exchangers offer the latest technology in heat transfer surface design to give you maximum efficiency and compact design. Waterside and refrigerant-side design enhancements minimize both en- ergy consumption and tube fouling. The “skip-fin” design at all intermediate tube supports provides maximum tube wall thickness at the support area to extend tube life.

FACTORY PACKAGING

REDUCES FIELD LABOR COSTS

YORK MAXE screw chillers are designed to keep instal- lation 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 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 MAXE screw chillers are designed to take full ad- vantage of colder cooling tower water temperatures, which are naturally available during most operating hours. Considerable energy savings are available by letting tower water temperature drop, rather than artifi- cially holding it above 75°F (23.9°C), especially at low load, as some chillers require.

U.L. ACCEPTANCE – YOUR ASSURANCE OF RELIABILITY

YORK MAXE screw chillers are approved for listing by Underwriter’s Laboratories for the United States and Canada. Recognition of safety and reliability is your as- surance of trouble-free performance in day-to-day build- ing operation.

YORK INTERNATIONAL 3