48N WEATHEREXPERT® Single-Package High-Efficiency Gas Heating/Electric Cooling Rooftop Units with Puron® Refrigerant (R-410A) 75 to 150 Nominal Tons 48N2 Vert Supply/Return CV or SAV 48N3 Vert Supply/Return VAV 48N4 Horz Supply/Return CV or SAV 48N5 Horz Supply/Return VAV 48N6 Vert Supply/Horz Return CV or SAV 48N7 Vert Supply/Horz Return VAV 48N8 Horz Supply/Vert Return CV or SAV 48N9 Horz Supply/Vert Return VAV Carrier N Series rooftop units are pre-wired and factory-tested in both cooling and heating modes. All 48N models feature a double wall foam panel cabinet design with hinged man-sized access panels. The standard airfoil supply fan or the optional high static airfoil supply fan will provide the necessary static pressure for todays complex building applications and highly featured units. Units are available in dedicated vertical, horizontal, and mixed supply/return airflow configurations for constant volume (CV), staged air volume (SAV), or variable air volume (VAV) applications. A wide variety of gas heating options are also available. Units come with the ComfortLink™ DDC (direct digital control) communicating control system and hermetic scroll compressors on dual independent refrigeration circuits. The refrigerant circuits are controlled via Electronic Expansion Valves (EXV).