York YR - Manual (Page 3)

3 YORK INTERNATIONAL
FORM 160.81-EG1
Introduction
The YORK M
AX
E 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
AX E 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
AX
E 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
AX
E 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
M
AX
E 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
M
AX
E 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 AX E 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 AX E 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 AX E 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.