Trane OABE OADE OAKE OANE (Water Source Heat Pump) Katalog
58
OAU-PRC003A-EN
Mechanical Specifications
Horizon Outdoor Air Mechanical Specifications
General
The units shall be down discharge airflow (OAD, OAK, or OAN) or convertible (OAB) between
down/horizontal for both supply and return openings. Cooling performance shall be rated in
accordance with ETL testing procedures. All units shall be factory assembled, internally wired, fully
charged with R-410A, and 100 percent run tested to check cooling operation, fan and blower
rotation, and control sequence before leaving the factory. Wiring internal to the unit shall be
colored and numbered for simplified identification. Units shall be ETL listed and labeled, classified
in accordance to UL 1995/CAN/CSA No. 236-M40 for Central Cooling Air Conditioners. Canadian
units shall be CSA Certified.
down/horizontal for both supply and return openings. Cooling performance shall be rated in
accordance with ETL testing procedures. All units shall be factory assembled, internally wired, fully
charged with R-410A, and 100 percent run tested to check cooling operation, fan and blower
rotation, and control sequence before leaving the factory. Wiring internal to the unit shall be
colored and numbered for simplified identification. Units shall be ETL listed and labeled, classified
in accordance to UL 1995/CAN/CSA No. 236-M40 for Central Cooling Air Conditioners. Canadian
units shall be CSA Certified.
Casing
Unit casing shall be constructed of zinc-coated, heavy gauge, galvanized steel. Exterior surfaces
shall be cleaned, phosphatized, and finished with a weather-resistant baked enamel finish. Unit’s
surface shall be tested 672 hours in a salt spray test in compliance with ASTM B117. Unit shall have
a 2-inch thick Antimicrobial Insulation with an R-value of 13. All insulation edges shall be either
captured or sealed. The unit’s base pan shall have no penetrations within the perimeter of the curb
other than the raised downflow supply/return openings to provide an added water integrity
precaution, if the condensate drain backs up. The top cover shall be one piece construction or,
where seams exist, it shall be double-hemmed and gasket-sealed. The ribbed top adds extra
strength and enhances water removal from unit top.
shall be cleaned, phosphatized, and finished with a weather-resistant baked enamel finish. Unit’s
surface shall be tested 672 hours in a salt spray test in compliance with ASTM B117. Unit shall have
a 2-inch thick Antimicrobial Insulation with an R-value of 13. All insulation edges shall be either
captured or sealed. The unit’s base pan shall have no penetrations within the perimeter of the curb
other than the raised downflow supply/return openings to provide an added water integrity
precaution, if the condensate drain backs up. The top cover shall be one piece construction or,
where seams exist, it shall be double-hemmed and gasket-sealed. The ribbed top adds extra
strength and enhances water removal from unit top.
Drain Pan
The drain pan is a single-walled assembly made of Type 304 stainless steel. It is sloped in two
planes and is fully drainable. The coils are mounted above the drain pan to allow easy inspection
and cleaning of the drain pan.
planes and is fully drainable. The coils are mounted above the drain pan to allow easy inspection
and cleaning of the drain pan.
Refrigeration and Dehumidification Systems
Compressors
All units shall have direct-drive, hermetic, scroll type compressors with centrifugal type oil pumps.
Motor shall be suction gas-cooled and shall have a voltage utilization range of plus or minus
10 percent of unit nameplate voltage. Internal overloads shall be provided with the scroll
compressors. Each compressor has a crankcase heater to minimize the amount of liquid refrigerant
present in the oil sump during off cycles.
Motor shall be suction gas-cooled and shall have a voltage utilization range of plus or minus
10 percent of unit nameplate voltage. Internal overloads shall be provided with the scroll
compressors. Each compressor has a crankcase heater to minimize the amount of liquid refrigerant
present in the oil sump during off cycles.