York PREDATORTM MAGNUM DJ 150 - Manual (Page 25)

036-21484-001-B-0103
Unitary Products 25
MECHANICAL SPECIFICATIONS
SINGLE PACKAGE AIR COOLED GAS/ELECTRIC UNITS FOR 12.5 NOMINAL TONS
PREDATOR™ MAGNUM - DJ 150
10.8 EER
GENERAL
Units shall be manufactured by York International Unitary
Products Group in an ISO 9001 certified facility. YORK®
Predator™/Magnum units are convertible single packages
with a common footprint cabinet and common roof curb for all
12-1/2 ton models. All units have two compressors
with independent refrigeration circuits to provide 2 stages of
cooling. The units were designed for light commercial appli-
cations and can be easily installed on a roof curb, slab, or
frame. All Predator™ units are self-contained and assembled
on rigid full perimeter base rails allowing for 3-way forklift
access and overhead rigging. Every unit is completely
charged, wired, piped, and tested at the factory to provide a
quick and easy field installation. All units are convertible
between side and down airflow. Independent Predator™/
Magnum Economizer designs are used on side and down
discharge applications, as well as all tonnage sizes. Preda-
tor™/Magnum units are available in the following
configurations: cooling only, cooling with electric heat, and
cooling with gas heat. Electric heaters are available as field-
installed accessories.
DESCRIPTION
Units shall be factory assembled, single package, (Elec/Elec,
Gas/Elec), designed for outdoor installation. Units shall have
a minimum EER of 10.8. They shall have built in field convert-
ible duct connections for down discharge supply/return or
horizontal discharge supply/return and be available with fac-
tory installed options or field installed accessories. The units
shall be factory wired, piped and charged with R-22 refriger-
ant and factory tested prior to shipment. All unit wiring shall
be both numbered and color coded. The cooling performance
shall be rated in accordance with DOE and ARI test proce-
dures. Units shall be CSA certified to ANSI Z21.47 and UL
1995/CAN/CSA No. 236-M90 standards.
UNIT CABINET
Unit cabinet shall be constructed of G90 galvanized steel with
exterior surfaces coated with a non-chalking, powder paint
finish, certified at 750 hours salt spray test per ASTM-B117
standards. Indoor blower sections shall be insulated with
1/2” thick insulation coated on the airside. Aluminum foil
faced insulation shall be used in the unit’s compartments and
be fastened to prevent insulation from entering the air
stream. Cabinet doors shall be hinged with tool-less access
for easy servicing and maintenance. Full perimeter base rails
shall be provided to assure reliable transit of equipment,
overhead rigging, fork truck access and proper sealing on
roof curb applications. Disposable 2” filters shall be fur-
nished and be accessible through hinged access door. Fan
performance measuring ports shall be provided on the out-
side of the cabinet to allow accurate air measurements of
evaporator fan performance without removing panels or cre-
ating bypass of the coils. Condensate pan shall be slide out
design, constructed of a non corrosive material, internally
sloped and conforming to ASHRAE 62-B9 standards. Con-
densate connection shall be a minimum of ¾” I.D. female and
be rigid mount connection.
INDOOR (EVAPORATOR) FAN ASSEMBLY
Fan shall be a belt drive assembly and include an adjustable
pitch motor pulley. Job site selected brake horsepower shall
not exceed the motors nameplate horsepower rating plus the
service factor. Units shall be designed to operate within the
service factor. Fan wheel shall be double inlet type with for-
ward curve blades, dynamically balanced to operate
smoothly throughout the entire range of operation. Airflow
design shall be constant volume. Bearings shall be sealed
and permanently lubricated for longer life and no
maintenance. Entire blower assembly and motor shall be
slide out design.
OUTDOOR (CONDENSER ) FAN ASSEMBLY
The outdoor fans shall be of the direct drive type, discharge
air vertically, have aluminum blades riveted to corrosion
resistant steel spider brackets and shall be dynamically bal-
anced for smooth operation. The outdoor fan motors shall
have permanently lubricated bearings internally protected
against overload conditions and staged independently. A
cleaning window shall be provided on two sides of the units
for coil cleaning.
REFRIGERANT COMPONENTS
Compressors: A. shall be scroll type, direct drive, internally
protected with internal high-pressure relief and over tempera-
ture protection. The hermetic motor shall be suction gas
cooled and have a voltage range of + or – 10% of the unit
nameplate voltage. B. Shall have internal spring isolation and
sound muffling to minimize vibration and noise, and be exter-
nally isolated on a dedicated, independent mounting.
Coils: A. evaporator and condenser coils shall have alumi-
num plate fins mechanically bonded to seamless internally
enhanced copper tubes with all joints brazed. Special Phe-
nolic coating shall be available as a factory option. B. Evapo-
rator and condenser coils shall be of the direct expansion,
draw-thru design.
Refrigerant Circuit and Refrigerant Safety Components shall
include: A. Independent fixed-orifice or thermally operated
expansion devices. B. Solid core filter drier/strainer to elimi-