254597-YTG-B-0507
Unitary Products Group
27
GUIDE SPECIFICATIONS
GENERAL
Units shall be manufactured by York International Unitary
Products Group in an ISO 9001 certified facility.
York's Sunline Ultra
®
units are convertible single package
units. Although the units are primarily designed for curb
mounting on a roof, they can also be slab-mounted at ground
level or set on steel beams above a finished roof. Cooling
only, cooling with gas heat and cooling with electric heat
models are available with a wide variety of factory-mounted
options and field-installed accessories to make them suitable
for almost every application. All units are self-contained and
assembled on full perimeter base rails with holes in the four
corners for overhead rigging. Every unit is completely piped,
wired, charged and tested at the factory to simplify the field
installation and to provide years of dependable operation. All
models (including those with an economizer) are suitable for
either bottom or horizontal duct connections. Models with
power exhaust are suitable for bottom duct connections only.
For bottom duct, remove the sheet metal panels from the
supply and return air openings through the base of the unit.
For horizontal duct, remove the supply and return air panels
on the rear of the unit.
All non-Scroll compressors include crankcase heaters and all
compressors have internal pressure relief. Every refrigerant
circuit includes a liquid line filter-drier, a discharge line high
pressure switch and a suction line with a freezestat and low
pressure/loss of charge switch.The unit control circuit
includes a 75 VA transformer, a 24-volt circuit breaker and a
relay board with a compressor lockout circuit, a terminal strip
for thermostat wiring, plus an additional set of pin connectors
to simplify the interface of additional field controls. All units
have long lasting powder paint cabinets with 1000 hour salt
spray test approval under ASTMB117 procedures. All models
are CSA listed. All models include a 1-year limited warranty
on the complete unit. Compressors and electric heater ele-
ments carry a 5-year warranty. Aluminized steel and Stainless
steel tubular heat exchangers carry a 10-year warranty.
DESCRIPTION
Units shall be factory-assembled, single packaged, Electric
Cooling/Gas Heat, Electric Cooling/Optional Electric Heat
and designed for outdoor mounted installation.
The 3 ton, 4 ton and 5 ton units shall have minimum SEER
ratings of 12.2, 13.2 and 12.2 respectively. They shall have
built-in field convertible duct connections for down discharge
supply/return or horizontal discharge supply/return, and be
available with factory installed options or field installed acces-
sories. The units shall be factory wired, piped, charged with
R-22 refrigerant and factory tested prior to shipment. All unit
wiring shall be both numbered and color coded. All units the
cooling performance shall be rated in accordance with DOE
and ARI test procedures. Units shall be CSA listed, classified
to ANSI Z21.47, UL 1995/CSA No. 236 standards.
UNIT CABINET
Unit cabinet shall be constructed of G90 galvanized steel,
with exterior surfaces coated with a non-chalking, powdered
paint finish, certified at 1000 hours salt spray test per
ASTMB117 standards. Indoor blower section shall be insu-
lated with a minimum 1/2” thick insulation, coated on the air-
side. Aluminum foil faced insulation shall be used in the
furnace compartment and be fastened with ridged fasteners
to prevent insulation from entering the air stream. Cabinet
panels shall be “large” size, easily removable for servicing
and maintenance. Full perimeter base rails shall be provided
to assure reliable transit of equipment, overhead rigging and
proper sealing on roof curb applications. Disposable 1" filters
shall be furnished and be accessible through a removable
access door, sealed airtight. Units filter track shall be
designed to accommodate either 1" or 2" filters. Fan perfor-
mance measuring ports shall be provided on the outside of
the cabinet to allow accurate air measurements of evaporator
fan performance without removing panels or creating air by-
pass of the coils. Condensate pan shall be internally sloped
and conform to ASHRAE 62-89 self-draining standards. Con-
densate connection shall be a minimum of 3/4” I.D. female
and be a ridged mount connection.
INDOOR (EVAPORATOR) FAN ASSEMBLY
The indoor fan shall be a factory installed with either direct
drive or belt drive assembly that includes an adjustable pitch
motor pulley. Job site selected brake horsepower (B.H.P.)
shall not exceed the motors nameplate horsepower rating,
plus the service factor. Units shall be designed not to operate
above service factor. Fan wheel shall be double-inlet type
with forward-curved blades, dynamically balanced to operate
smoothly throughout the entire range of operation. Airflow
design shall be constant air volume. Bearings shall be sealed
and permanently lubricated for longer life and no mainte-
nance.
OUTDOOR (CONDENSER) FAN ASSEMBLY
The outdoor fan shall be of the direct-driven propeller type,
discharge air vertically, have aluminum blades riveted to a
corrosion resistant steel spider bracket and shall be dynami-
cally balanced for smooth operation. The outdoor fan motor
shall be totally enclosed with permanently lubricated bear-
ings, internally protected against overload conditions and
staged independently.
REFRIGERANT COMPONENTS
Compressor:
a.
Shall be internally protected with internal high-pres-
sure relief and over temperature protection.
b.
Shall have internal spring isolation and sound muf-
fling to minimize vibration and noise, and be exter-
nally isolated on a dedicated, independent
mounting.
