York 292443-XTG-B-0807 Benutzerhandbuch

Subject to change without notice. Printed in U.S.A.

  

292443-XTG-B-0807

Copyright © 2007 by Unitary Products Group. All rights reserved.

Supersedes: 292443-XTG-A-0207

to shipment. All unit wiring shall be both numbered and 
color coded. All units shall be manufactured in a facility cer-
tified to ISO 9001 standards, and the cooling performance 
shall be rated in accordance with DOE and ARI test proce-
dures. The heating performance shall be rated to DOE and 
GAMA test procedures. Units shall be CSA listed and classi-
fied to ANSI Z21.47/CAN/CSA 2.3 standards and UL 1995/
CAN/CSA No. 236-M90 conditions.

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 ASTM-
B117 standards. The unit top shall be a single piece “Water 
Shed” design, with drip edges and no-seam corners to pro-
vide optimum water integrity. Unit shall have a rigidly 
mounted condenser coil guard to provide protection from 
objects and personnel after installation. Indoor blower section 
shall be insulated with up to 3/4” thick, aluminum, foil faced 
insulation, fastened to prevent insulation from entering the air 
stream. Cabinet panels shall be “large” size, easily remov-
able for servicing and maintenance, with built-in lift handles. 
Unit shall be built on a formed, “Super-Structure” design base 
pan, with embossments at critical points to add strength, 
rigidity and aid in minimizing sound. Full perimeter base rails 
shall be provided to assure reliable transit of equipment, 
overhead rigging, for truck access and proper sealing on roof 
curb applications. Base rails shall be removable, when 
required, to lower unit height. Filters shall be furnished and 
be accessible through a removable access door, sealed air-
tight. Units vertical discharge and return duct configuration 
shall be designed to fit between standard 24” O.C. beams 
without modification to building structure, duct work and base 
unit. Condensate pan shall be internally sloped and conform 
to ASHRAE 62-89 self-draining standards, with 3/4” NPTI 
copper, ridged mount connection.

Fan shall be direct drive, multi-speed design. Job site 
selected (BHP) brake horsepower shall not exceed the 
motors nameplate horsepower rating. 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. Bear-
ings shall be sealed and permanently lubricated for longer life 
and no maintenance. Fan assembly shall be “Slip Track” 
(slide-out) design for easy removal and cleaning.

The outdoor fan shall be of the direct-driven propeller type, 
discharge air vertically, have aluminum blades riveted to cor-

rosion resistant steel spider bracket and shall be statically 
balanced for smooth operation. The outdoor fan motor shall 
be totally enclosed with permanently lubricated bearings and 
internally protected against overload conditions.

Compressors: 

a.

Shall be fully hermetic type, direct drive, internally
protected with internal high-pressure relief and over
temperature 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 isolation and sound muffling to
minimize vibration and noise, and be externally iso-
lated 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.

b.

Evaporator coil shall be of the direct expansion,
blow through design, while condenser coil shall be
draw through design.

Refrigerant Circuit and Refrigerant Safety Components:

a.

Shall include independent fixed-orifice expansion
devices.

b.

Shall include filter/strainer to eliminate any foreign
matter.

Unit shall be capable of starting and running at 125º F out-
door temperature, exceeding maximum load criteria ARI 
Standard 210/240. The compressor, with standard controls, 
shall be capable of operation down to 45º F outdoor tempera-
ture. Accessory low ambient kit shall be available for opera-
tion to 0º F.

All unit power wiring shall enter unit cabinet at a single factory 
provided location and be capable of side or bottom entry, to 
minimize roof penetrations and avoid unit field modifications. 
Separate side and bottom openings shall be provided for the 
control wiring.