FORM 150.67-NM2 (209)
13
JOHNSON CONTROLS
2
SECTION 2 – PRODUCT DESCRIPTION
INTRODUCTION
YORK Millennium
®
Air-Cooled Scroll Chillers provide
chilled water for all air con di tion ing ap pli ca tions using
central station air han dling or terminal units. They are
completely self-contained and are de signed for outdoor
(roof or ground lev el) in stal la tion. Each complete
packaged unit in cludes her met ic scroll com pres sors, a
liq uid cool er, air cooled con dens er, a charge of refrigerant
R-410A and a weather resistant microprocessor con trol
center, all mount ed on a pressed steel base.
The units are completely assembled with all
interconnecting refrigerant piping and internal wiring,
ready for
fi
eld installation.
Prior to delivery,
the packaged unit is pressure-tested,
evacuated, and fully charged with Refrigerant-R410A
and oil. After assembly, a complete operational test is
performed with water
fl
owing through the cooler to
assure that the refrigeration circuit operates correctly.
The unit structure is heavy-gauge, galvanized steel. This
galvanized steel is coated with baked-on powder paint,
which, when subjected to ASTM B117 1000 hour, salt
spray testing, yields a minimum ASTM 1654 rating of
“6”. Corrosion resistant wire mesh panels are added to
protect the condenser coil from incidental damage and
restrict unauthorized access to internal components.
Units are designed in accordance with NFPA 70
(National Electric Code), ASHRAE/ANSI 15 Safety
code for mechanical refrigeration, ASME, Listed and
labeled with Intertek Testing Services (ETL) and rated
in accordance with ARI Standard 550/590-2003.
All exposed power wiring is routed through liquid-
tight, non-metallic conduit.
GENERAL SYSTEM DESCRIPTION
Compressors
The chiller has suction-gas cooled, hermetic, scroll
compressors. The YCAL compressors incorporate
a compliant scroll design in both the axial and
radial direction. All rotating parts are statically and
dynamically balanced. A large internal volume and oil
reservoir provides greater liquid tolerance. Compressor
crankcase heaters are also included for extra protection
against liquid migration.
Evaporator (Heat Exchanger)
The Brazed Plate Heat Exchanger is equipped with a
heater controlled by the microprocessor. The heater
provides freeze protection for the cooler down to -
20 °F (-29 °C) ambient. The cooler is covered with
3/4” (19mm) flexible, closed-cell, foam insulation
(K~0.25).
Brazed plate heat exchangers shall be UL (Underwriters
Laboratories) listed. Installing contractor must include
accommodations in the chilled water piping to allow
proper drainage and venting of the heat exchanger. Water
inlet and outlet connections are grooved for compatibility
with factory supplied victaulic connections.
LD10950
DUAL CIRCUIT
Summary of Contents for YCAL0019
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