York DY 048 User Manual

343615-YTG-B-0308

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Johnson Controls Unitary Products

Units shall be manufactured by York International Unitary 
Products Group in an ISO 9001 certified facility.

York's Sunline Magnum™ units are convertible single pack-
age 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 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.

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 
rating of 14. 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 accessories. 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 proce-
dures. Units shall be CSA listed, classified to ANSI Z21.47, 
UL 1995/CSA No. 236 standards.

Unit cabinet shall be constructed of a combination of G60 and 
G90 galvanized steel, with exterior surfaces coated with a 
non-chalking, powdered paint finish, certified at 750 hours 
salt spray test per ASTMB117 standards. Indoor blower sec-
tion shall be insulated with a minimum 1/2” thick insulation, 
coated on the airside. 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 ser-
vicing and maintenance. Full perimeter base rails shall be 
provided to assure reliable transit of equipment, overhead rig-
ging 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 per-
formance 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.

The indoor fan shall be a factory installed direct drive. Job 
site selected (B.H.P.) brake horsepower 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 lubri-
cated for longer life and no maintenance.

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.

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.