York YR User Manual download pdf (Page 3)

YORK INTERNATIONAL

FORM 160.81-EG1

Introduction

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 M

AXE 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 M

AXE 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 M

AXE 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

AXE 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

AXE 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 M

AXE 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 M

AXE 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 M

AXE 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.

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York YR User Manual Page 3

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