They feature ball bearings that are double-sealed and permanently lubri- cated.Īll controls are contained in a NEMA 3R/12 (and equiva- lent to IP55*) cabinet with hinged outer door and include: Motors – The fan motors are Totally Enclosed Air-Over, squirrel-cage type, current protected. The fan guards are constructed of heavy-gauge, rust-resistant, PVC (polyvinyl chloride)-coated steel wire. They are directly driven, and positioned for vertical air discharge. They are designed for maximum efficiency and are statically and dynamically balanced for vibration-free operation. Low Sound Fans – The condenser fans are composed of corrosion resistant aluminum hub and composite blades molded into a low noise airfoil section. The design working pressure of the coil is 650 PSIG (45 barg). The cooler is covered with 3/4” (19mm) flexible, closed-cell, foam insulation (K≈0.25).Ī strainer with a mesh size between 40 mesh (0.5 and 1.5 mm) is required upstream of the heat exchanger to prevent clogging.ĬONDENSER Coils – Fin and tube condenser coils of seamless, inter- nally-enhanced, high-condensing-coefficient, corrosion resistant copper tubes are arranged in staggered rows, mechanically expanded into aluminum fins. The heater provides freeze protection for the cooler down to -20☏ (-29☌) ambient. The cooler is equipped with a heater controlled by a sepa- rate thermostat. Water inlet and outlet connections are grooved for compatibility with factory supplied ANSI/AWWA C-606 connections. Installing contractor must include ac-Ĭommodations in the chilled water piping to allow proper drainage and venting of the heat exchanger. Compressor crankcase heaters are also included for extra protection against liquid migration.ĬOOLER Brazed plate heat exchangers are UL (Underwriters Laboratories) listed. A large internal volume and oil reservoir provides greater liquid tolerance. All rotating parts are statically and dynamically balanced. The compressors incorporate a scroll design that is compliant in both the axial and radial direction.
York corporation ycal air cooled scroll chillers code#
Units are designed in accordance with NFPA 70 (National Electric Code), ASHRAE/ANSI 15 Safety code for mechanical refrig- eration, ASME, Listed and labeled with Intertek Test- ing Services (ETL) and rated in accordance with the latest version of ARI Standard 550/590.ĬOMPRESSORS The chiller has suction-gas cooled, hermetic, scroll com- pressors.
Unit also includes service isolation valves as standard. Corrosion resistant wire mesh panels are added to protect the con- denser coil from incidental damage and restrict unauthor- ized access to internal components. 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”. The unit structure is heavy-gauge, galvanized steel. After assembly, a complete operational test is performed with water flowing through the cooler to assure that the refrigeration circuit operates correctly. The unit is pressure-tested, evacuated, and fully charged with Refrigerant-410A and includes an initial oil charge. Specification GENERAL The 15 - 65 Ton (53 - 218 kW) YCAL models are shipped complete from the factory ready for installation and use. Introduction Model YCAL Air-Cooled Scroll Compressor Liquid Chillers Style E 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. They are completely self-contained and are designed for outdoor (roof or ground level) installation. YORK Air-Cooled Scroll Chillers provide chilled water for all air conditioning applications using cen- tral station air handling or terminal units. Products are produced at a fac i l i t y whose qua l i t y - management systems are ISO9001 certified.
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