GENERAL
The 15 - 130 Ton (53 - 457 kW) YCUL Condensing Unit Models are shipped complete from the factory ready for field installation.
The unit is pressure-tested, evacuated and given a nitro- gen holding charge and includes an initial oil charge (R- 22 or HFC-407C refringerant supplied by others). After assembly, a operational test is performed to assure that each control device 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 500 hour, salt spray testing, yields a minimum ASTM 1654 rating of “6”. Units are designed in accordance with NFPA 70 (National Electric Code), ASHRAE/ANSI 15 Safety code for mechanical refrigeration, and are cETL listed. All units are produced at an ISO 9000-registered facility.
COMPRESSORS
The chiller has suction-gas cooled, hermetic, scroll compressors. The compressors incorporate a compli- ant scroll design in both the axial and radial direction. All rotating parts of the compressors 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.
CONDENSER
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. Integral subcooling is included. The design working pressure of the coil is 450 PSIG (31 bar).
Fans – The condenser fans are composed of corrosion- resistant aluminum hub and glass-fiber-reinforced polypropylene composite blades molded into a low noise airfoil section. The are designed for maximum efficiency and are statically and dynamically balanced for vibration free operation. They are directly driven by independent motors, and positioned for vertical air discharge. The fan guards are constructed of heavy- gauge, rust-resistant, coated steel. All blades are statically and dynamically balanced for vibration-free operation.
Motors – The fan motors are Totally Enclosed Air-Over, squirrel-cage type, current protected. They feature ball bearings that are double-sealed and permanently lubricated.
REFRIGERANT CIRCUIT
One (YCUL0016-0040) or two (YCUL0046-0130) inde- pendent refrigerant circuits will be finished on each unit. All unit piping will be copper, with brazed joints. The liquid line will include a field connection shutoff valve with charging port located on each condenser circuit. Suc- tion line connections are provided on each refrigeration circuit. A filter drier and sight glass are shipped loose for field installation on each refrigerant circuit.
All expansion valves, liquid line solenoid valves, refriger- ant, and refrigerant field piping are supplied by others.
