York DR120 Manuel D’Utilisation

246721-YTG-C-0606

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Unitary Products Group

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

 MagnaDRY™ units are convertible single pack-

ages with a common footprint cabinet and common roof curb 
for all 7-1/2 through 12-1/2 ton models. All units have two 
compressors with independent refrigeration circuits to pro-
vide 2 stages of cooling. The units were designed for light 
commercial applications and can be easily installed on a roof 
curb, slab, or frame. All Predator

 MagnaDRY™ 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. Inde-
pendent economizer designs are used on side and down dis-
charge applications, as well as all tonnage sizes. Predator

 

MagnaDRY™ units are available in the following configura-
tions: cooling only, cooling with electric heat, and cooling with 
gas heat. Electric heaters are available as factory-installed 
options or field-installed accessories.

Units shall be factory assembled, single package, (Elec/Elec, 
Gas/Elec), designed for outdoor installation. Units shall have 
a minimum EER of 9.0. 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 shall be constructed of G90 galvanized steel with 
exterior surfaces coated with a non-chalking, powder paint 
finish, certified at 1000 hours salt spray test per ASTM-B117 
standards. Indoor blower sections shall be insulated with up 
to 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 furnished 
and be accessible through hinged access door. 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 bypass 
of the coils. Condensate pan shall be slide out design, con-
structed of a non corrosive material, internally sloped and 
conforming to ASHRAE 62-B9 standards. Condensate con-
nection shall be a minimum of ¾” I.D. female and be rigid 
mount connection.

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 mainte-
nance. Entire blower assembly and motor shall be slide out 
design. 

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.

Compressors: 

A.

Shall be fully hermetic type, direct drive, internally pro-
tected with internal high-pressure relief and over temper-
ature 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 externally isolated
on a dedicated, independent mounting.

Coils:

A.

Evaporator and condenser coils shall have aluminum
plate fins mechanically bonded to seamless internally
enhanced copper tubes with all joints brazed. Special
Phenolic coating shall be available as a factory option. 

 B. Evaporator and condenser coils shall be of the direct 

expansion, draw-thru design.