York YS User Manual

3JOHNSON CONTROLS
FORM 160.80-EG1 (808)
Introduction
The YORK Millennium YS Chiller offers a complete com-
bination of features for total owner satisfaction.
MATCHED COMPONENTS MAXIMIZE EFFICIENCY
Actual chiller efciency cannot be determined by analyzing
the theoretical efciency of any one chiller component.
It requires a specic combination of heat exchanger,
compressor, and motor performance to achieve the low-
est system kW/Ton. YORK Millennium chiller technology
matches chiller system components to provide maximum
chiller efciency under actual – not just theoretical – op-
erating conditions.
REAL-WORLD ENERGY PERFORMANCE
Johnson Controls pioneered the term “Real-World Energy”
to illustrate the energy-saving potential of focusing on
chiller performance during off-design conditions. Off-de-
sign 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 Millennium 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 ensuring good coverage of the cooling ll.
YORK Millennium chillers offer the most efcient Real-
World operation of any chiller, meaning lower operating
costs and an excellent return on your chiller investment.
OPEN DRIVE DESIGN
Hermetic-motor burnout can cause catastrophic damage
to a chiller. The entire chiller must be cleaned, and the
refrigerant replaced. YORK Millennium screw chillers
eliminate this risk by utilizing air-cooled motors. Refrig-
erant never comes in contact with the motor, preventing
contamination of the rest of the chiller.
Insurance companies that offer policies on large air condi-
tioning equipment often consider air-cooled motors a sig-
nicant advantage over hermetic refrigerant cooled units.
HIGH-EFFICIENCY HEAT EXCHANGERS
Millennium chiller 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 design enhancements minimize both
energy consumption and tube fouling.
FACTORY PACKAGING REDUCES FIELD LABOR
COSTS
YORK Millennium 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 in-
stallation.
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 Millennium screw chillers are designed to take full
advantage 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 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 Millennium 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 building
operation.

York YS Specifications

General

Brand	York
Model	YS
Category	Chiller
Language	English