FORM 150.67-EG1 (219)
JOHNSON CONTROLS
5
YORK Air-Cooled Scroll Chillers provide chilled water for all air conditioning applications
using central station air handling or terminal units. They are completely self-contained and
are designed for outdoor (roof or ground level) installation. Each unit includes hermetic
scroll compressors, a liquid cooler, air cooled condenser, a charge of refrigerant R-410A,
and a weather resistant microprocessor control center, all mounted on a rugged, formed-
steel base.
GENERAL
The 15 - 65 Ton (53 - 218 kW) YCAL models are shipped complete from the factory ready
for installation and use.
The unit is pressure-tested, evacuated, and fully charged with R-410A and includes an
initial oil charge. After assembly, a complete operational test is performed with water flow-
ing through the cooler to assure that the refrigeration circuit operates correctly.
The unit structure is heavy-gauge, galvanized steel. The 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. Unit also includes service isolation valves as standard. 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 the latest version of ARI Standard 550/590.
COMPRESSORS
The chiller has suction-gas cooled, hermetic, scroll compressors. The compressors incor-
porate a scroll design that is compliant 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.
COOLER
Brazed plate heat exchangers are UL (Underwriters Laboratories) listed. Installing con-
tractor 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 ANSI/AWWA C-606 connections.
The cooler is equipped with a heater controlled by a separate thermostat. 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).
A 40 mesh strainer (0.5 and 1.5 mm) is recommended upstream of the heat exchanger to
prevent clogging.
Introduction
Содержание YCAL Series
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Страница 47: ...FORM 150 67 EG1 219 JOHNSON CONTROLS 47 Unit Dimensions Cont d YCAL0028 LD18674...
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Страница 88: ...JOHNSON CONTROLS FORM 150 67 EG1 219 88 Power Wiring Single Circuit ld18707...
Страница 89: ...FORM 150 67 EG1 219 JOHNSON CONTROLS 89 Power Wiring Single Circuit Cont d...
Страница 90: ...JOHNSON CONTROLS FORM 150 67 EG1 219 90 Power Wiring Single Circuit Cont d...
Страница 91: ...FORM 150 67 EG1 219 JOHNSON CONTROLS 91 LD18746 Power Wiring Dual Circuit...
Страница 92: ...JOHNSON CONTROLS FORM 150 67 EG1 219 92 Factory wired with optional transformer LD03611 Control Wiring...