Single-Package Rooftop Ultra-High Efficiency Electric Cooling Units with Optional electric Heat 3 to 23 Nominal Tons 48/50LC Unit Icon 50LC WEATHEREXPERT™ rooftop units were designed by customers for customers. They are Carriers most efficient commercial packaged rooftop ever produced and have the industrys highest IEERs available. The multi stage cooling compressor with Carriers Staged Air Volume (SAV™) system allows for added comfort, energy savings and humidity control. The unit is ideal for single zone variable air volume capability. Units are pre-wired and pre-charged with environmentally sound Puron® (R-410A) refrigerant at the factory. The units are factory tested in both heating and cooling modes. Performance Features Puron® (R-410A) HFC refrigerant Fully hermetic scroll compressor design Exceeds ASHRAE 90.1 and Energy Star efficiency levels Exceeds Consortium for Energy Efficiency (CEE) criteria 3 to 5 ton models have two-stage cooling capacity control 6 to 23 ton models have three-stage cooling capacity control SEERs up to 17.5 with direct drive ECM indoor fan system SEERs up to 16.4 with belt drive/VFD indoor fan system IEERs up to 21.0 Outdoor sound levels as low as 76 dBs Exclusive non-corrosive composite condensate pan in accordance with ASHRAE 62 Standard, sloping design; side or center drain Pre-painted exterior panels and primer-coated interior panels tested to 500 hours salt spray protection TXV refrigerant metering device with a single refrigerant circuit design for a fully activated evaporator coil