JOHNSON CONTROLS
15
FORM 150.67-NM2
ISSUE DATE: 01/31/2019
2
SECTION 2 – PRODUCT DESCRIPTION
LD10950
DUAL CIRCUIT
INTRODUCTION
YORK Air-Cooled Scroll Chillers provide chilled wa-
ter for all air conditioning applications using central
station air handling or terminal units. They are com-
pletely self-contained and are designed for outdoor
(roof or ground level) installation. Each complete
packaged unit includes hermetic scroll compressors, a
liquid cooler, air cooled condenser, a charge of refrig-
erant R-410A and a weather resistant microprocessor
control center, all mounted on a pressed steel base.
The units are completely assembled with all intercon-
necting refrigerant piping and internal wiring, ready
for field 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 flowing through the cooler to as-
sure 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 inciden-
tal 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, List-
ed 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 dynami-
cally balanced. A large internal volume and oil res-
ervoir 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 heat-
er 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).
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