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0 TRANE, <br /> Mechanical Specifications <br /> General <br /> The units shall be convertible airflow.The operating range shall be between 115°F and 0°F in <br /> cooling as standard from the factory for units with microprocessor controls.Cooling performance <br /> shall be rated in accordance with AHRI testing procedures.All units shall be factory assembled, <br /> internally wired,fully charged with R-410A,and 100 percent run tested to check cooling operation, <br /> fan and blower rotation,and control sequence before leaving the factory.Wiring internal to the unit <br /> shall be colored and numbered for simplified identification.Units shall be cULus listed and labeled, <br /> classified in accordance for Central Cooling Air Conditioners. <br /> Casing <br /> Unit casing shall be constructed of zinc coated, heavy gauge,galvanized steel. Exterior surfaces <br /> shall be cleaned, phosphatized,and finished with a weather-resistant baked enamel finish. Unit's <br /> surface shall be tested 500 hours in a salt spray test in compliance with ASTM B117. Cabinet <br /> construction shall allowfor all maintenance on one side of the unit.Service panels shall have lifting <br /> handles and be removed and reinstalled by removing two fasteners while providing a water and <br /> airtight seal.All exposed vertical panels and top covers in the indoor air section shall be insulated <br /> with a cleanable foil-faced,fire-retardant permanent,odorless glass fiber material.The base of the <br /> unit shall be insulated with 1/8 inch,foil-faced,closed-cell insulation.All insulation edges shall be <br /> either captured or sealed.The unit's base pan shall have no penetrations within the perimeter of <br /> thecurb otherthanthe raised 1 1/8 inch high downflow supply/return openingsto provide an added <br /> water integrity precaution, if the condensate drain backs up.The base of the unit shall have <br /> provisions for forklift and crane lifting,with forklift capabilities on three sides of the unit. <br /> Compressors <br /> All units shall have direct-drive,hermetic,scroll type compressors with centrifugal type oil pumps. <br /> Motor shall be suction gas-cooled and shall have a voltage utilization range of plus or minus 10 <br /> percent of unit nameplate voltage. Internal overloads shall be provided with the scroll <br /> compressors. <br /> Crankcase heaters shall be included on all heat pump units. <br /> Dual compressors are outstanding for humidity control,light load cooling conditions and system <br /> back-up applications. <br /> Controls <br /> Unit shall be completely factory-wired with necessary controls and contactor pressure lugs or <br /> terminal block for power wiring. Unit shall provide an external location for mounting a fused <br /> disconnect device. <br /> Microprocessor controls shall be available. <br /> Microprocessor controls provide for all 24V control functions.The resident control algorithms shall <br /> make all heating,cooling, and/or ventilating decisions in response to electronic signals from <br /> sensors measuring indoor and outdoor temperatures.The control algorithm maintains accurate <br /> temperature control, minimizes drift from set point,and provides better building comfort.A <br /> centralized microprocessor shall provide anti-short cycle timing and time delay between <br /> compressors to provide a higher level of machine protection. <br /> Units shall have single point power entry as standard. <br /> Evaporator and Condenser Coils <br /> Internally finned,5/16"coppertubes mechanically bondedto a configured aluminum platefin shall <br /> be standard.Coils shall be leaktested atthefactoryto ensurethe pressure integrity.The evaporator <br /> coil and condenser coil shall be leak tested to 600 psig.The assembled unit shall be leak tested to <br /> 465 psig.The condenser coil shall have a patent pending 1+1+1 hybrid coil designed with slight <br /> gaps for ease of cleaning.A plastic,dual-sloped,removable and reversible condensate drain pan <br /> with through-the-base condensate drain is standard. <br /> 80 PKGP-PRC013K-EN <br />