From inside (document excerpt):
24APA5 Performancet 15 Series Air Conditioner with Puronr Refrigerant Sizes 18 to 60 1 1/2 to 5 Nominal Tons Product Data INDUSTRY LEADING FEATURES / BENEFITS Energy Efficiency S 13.5 — 16.5 SEER/11.7–13.5 EER New Aesthetic Design S WeatherArmor Ultrat Baked on powder paint Steel louver coil guard Color matched cabinet screws Extra Quiet Operation S Silencer System IIt for sound as low as 66 dBA Quiet mount split post compressor grommets Exclusive Silencer Top design Forward-swept condenser fan blade 8-pole PSC ball bearing condenser fan motor Compressor sound hood Laminated compressor mounting plate Carrier’s Air Conditioners with Puronr refrigerant provide a collection of features unmatched by any other family of equipment.
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The 24APA5 has been designed utilizing Carrier’s Puron refrigerant. The environmentally sound refrigerant allows you to make a responsible decision in the protection of the earth’s ozone layer. As an Energy Starr Partner, Carrier Corporation has determined that this product meets the Energy Starr guidelines for energy efficiency. Refer to the combination ratings in the Product Data for system combinations that meet Energy Starr guidelines. Reliability, Quality and Toughness S Scroll compressor S Field–installed 16 cu. in. filter drier S Back–seating service valves S High pressure switch S Loss of charge switch S Internal pressure relief valve S Internal thermal overload Controls and Diagnostics S Infinityt control compatible or thermostat S Utility Interface Connection S Up to 14 point diagnostic capability Applications S Longline — up to 250 ft. total equivalent length S Low ambient (down to 0_F) with complete Infinityt System Limited Warranty S 10–year limited warranty on compressor S Standard 5–year limited warranty on all parts MODEL NUMBER NOMENCLATURE 1 N 2 Product Series 24=AC 2 N 4 3 A A Product Family A=RES AC 4 A P Tier P=Performance 5 A/N A Major.