Model YCUL Air-Cooled Scroll Compressor ... - Usair-eng.com

SpecificationGENERALThe 40 - 80 Ton (140 - 281 kW) YCUL models are shippedcomplete from the factory ready for installation and use.The unit is pressure-tested, evacuated and given a nitrogenholding charge and includes an initial oil charge(R-410A refrigerant supplied by others). After assembly, aoperational test is performed to assure that each controldevice operates correctly.The unit structure is heavy-gauge, galvanized steel.This galvanized steel is coated with baked-on powderpaint, which, when subjected to ASTM B117 1000 hour,salt spray testing, yields a minimum ASTM 1654 ratingof “6”. Units are designed in accordance with NFPA 70(National Electric Code), ASHRAE/ANSI 15 Safety codefor mechanical refrigeration, and are cETL listed. All unitsare produced at an ISO 9000-registered facility.COMPRESSORSThe chiller has suction-gas cooled, hermetic, scroll compressors.The YCUL compressors incorporate a scroll designthat 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 greaterliquid tolerance. Compressor crankcase heaters are alsoincluded for extra protection against liquid migration.CONDENSERCoils – Fin and tube condenser coils of seamless, internally-enhanced,high-condensing-coefficient, corrosionresistant copper tubes are arranged in staggered rows,mechanically expanded into aluminum fins. Integralsubcooling is included. The design working pressure ofthe coil is 650 PSIG (45 barg).Low Sound Fans – The condenser fans are composed ofcorrosion resistant aluminum hub and composite bladesmolded into a low noise airfoil section. They are designedfor maximum efficiency and are statically and dynamicallybalanced for vibration-free operation. They are directlydriven, and positioned for vertical air discharge. The fanguards are constructed of heavy-gauge, rust-resistant,PVC (polyvinyl chloride)-coated steel wire.Motors – The fan motors are Totally Enclosed Air-Over,squirrel-cage type, current protected. They feature ballbearings that are double-sealed and permanently lubricated.JOHNSON CONTROLS