York YK Manual page 7

Introduction (Cont'd)
JOHNSON CONTROLS
FACTORY PACKAGING REDUCES FIELD LABOR COSTS
YORK YK centrifugal chillers are designed to keep installation costs low. Where instal-
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lation 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 Variable Speed Drive or 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 YK centrifugal chillers have been designed to take full advantage of colder cool-
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ing tower water temperatures, which are naturally available during most operating hours.
Considerable energy savings are available by letting tower water temperature drop, rather
than artificially holding it above 75°F (23.9°C), especially at low load, as some chillers
require.
UL COMPLIANCE – YOUR ASSURANCE OF RELIABILITY
YORK YK centrifugal chillers are approved to UL Standard 1995 for listing by a qualified
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nationally recognized testing laboratory for the United States and Canada. Recognition of
safety and reliability is your assurance of trouble free performance in day to-day building
operation.
Some chiller options or modifications may affect the UL compliance of the chiller. Some
examples include: special motor enclosures ( like TEFC, TEWAC, or TEAAC) or special
panels (NEMA 4X) or special unit wiring options (anything other than NEMA 1). For further
clarification, contact Johnson Controls Large Tonnage Marketing.
COMPUTERIZED PERFORMANCE RATINGS
Each chiller is custom matched to meet the individual building load and energy require-
ments. A large number of standard heat exchangers and pass arrangements are available
to provide the best possible match.
It is not practical to provide tabulated performance for each combination, as the energy
requirements at both full and part load vary significantly with each heat exchanger and
pass arrangement. Computerized ratings are available through each Johnson Controls
Sales Office. These ratings can be tailored to specific job requirements, and are part of
the AHRI Certification Program.
FORM 160.75-EG1 (519)
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