Specifications

3JOHNSON CONTROLS
FORM 160.80-EG1 (511)
Introduction
The YORK YS Chiller offers a complete combination of
features for total owner satisfaction.
MATCHED COMPONENTS MAXIMIZE EFFICIENCY
Actual chiller efciency cannot be determined by ana lyzing
the theoretical efciency of any one chiller com ponent. It
requires a specic combination of heat exchanger, com-
pressor, and motor performance to achieve the lowest
system kW/Ton. YORK chiller technology matches chiller
system components to provide maximum chiller efciency
under actual – not just theoretical – operating conditions.
REAL-WORLD ENERGY PERFORMANCE
Johnson Controls pioneered the term “Real-World En-
ergy” to illustrate the energy-saving potential of focus-
ing 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 YS chillers are the only chillers designed to operate
on a continuous basis with cold ECWT and full condenser
ow at all load points, taking full advantage of Real-World
conditions. This type of operation benets the cooling
tower as well; reducing cycling of the fan motor and en-
suring good coverage of the cooling ll.
YORK chillers offer the most efcient Real-World opera-
tion of any chiller, meaning lower operating costs and an
excellent return on your chiller investment.
OPEN DRIVE DESIGN
Hermetic-motor burnout can cause catastrophic dam-
age to a chiller. The entire chiller must be cleaned, and
the refrigerant replaced. YORK screw chillers eliminate
this risk by utilizing air-cooled motors. Refrigerant never
comes in contact with the motor, preventing contamination
of the rest of the chiller.
Insurance companies that offer policies on large air con-
ditioning equipment often consider air-cooled mo tors a
signicant advantage over hermetic refrigerant cooled units.
HIGH-EFFICIENCY HEAT EXCHANGERS
YORK heat exchangers offer the latest tech nology in heat
transfer surface design to give you maxi mum efciency
and compact design. Water-side and refrigerant-side de-
sign enhancements minimize both energy consumption
and tube fouling.
FACTORY PACKAGING REDUCES FIELD LABOR
COSTS
YORK YS screw chillers are designed to keep installation
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 pro vide all power to the
chiller and its auxiliaries.
TAKE ADVANTAGE OF COLDER COOLING TOWER
WATER TEMPERATURES
YORK YS screw chillers are de signed to take full advan-
tage of colder cooling tower water temperatures, which
are naturally available dur ing most operating hours. Con-
siderable energy savings are available by letting tower
water temperature drop, rather than articially holding
it above 75°F (23.9°C), especially at low load, as some
chillers require.
U.L. ACCEPTANCE – YOUR ASSURANCE OF RELI-
ABILITY
YORK YS screw chillers are approved for listing by Under-
writer’s Laboratories for the United States and Canada.
Recognition of safety and reliability is your assurance of
trouble-free performance in day-to -day building operation.