York YCUL0045E, Installation Operation & Maintenance

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JOHNSON CONTROLS
12
FORM 150.63-NM8 (1020)
GENERAL
The 53 - 457 kW YCUL0045E - 0275E 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 refrigerant supplied by others).
After assembly, an 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 facil-
ity.
COMPRESSORS
The unit has suction-gas cooled, hermetic, scroll com-
pressors. The YCUL0045-0275 compressors incorporate
a compliant 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 toler-
ance. 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. They 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 dis-
charge. 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 lubri-
cated.
REFRIGERANT CIRCUIT
One (YCUL0045-0121) or two (YCUL0125-0275)
independent 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. Suction 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,
refrigerant, and refrigerant field piping are supplied
by others.
SPECIFICATIONS
Specification