From inside (document excerpt):
24ANA7 Infinityt 17 Series Air Conditioners with PuronR Refrigerant Sizes 24 To 60 2 To 5 Nominal Tons Product Data INDUSTRY LEADING FEATURES / BENEFITS Energy Efficiency S 13–17.1 SEER/10.3–13 EER New Aesthetic Design S WeatherArmor Ultrat Cabinet Baked on powder paint Steel louver coil guard Color matched ceramic coated cabinet screws Extra Quiet Operation S Silencer System IIt for sound as low as 67 dBA Quiet mount split post compressor grommets Exclusive Silencer Top design 8 pole PSC ball bearing outdoor condenser fan motor Forward-swept condenser fan blade Compressor sound hood Laminated steel compressor mounting plate the environmentally sound refrigerant Carrier’s Air Conditioners with Puronr refrigerant provide a collection of features unmatched by any other family of equipment.
The 24ANA7 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 Two–Stage reciprocating compressor S Field–installed 16 cu. in. filter drier S Back–seating service valves S High pressure switch S Low pressure switch S Internal pressure relief valve S Internal thermal overload Controls and Diagnostics S Infinityt control or Thermostat S Utility Interface Connection S Up to 23 point diagnostic capability Applications S Long–line — up to 250 ft. total equivalent length. See Long-Line Guideline for more information. S Low ambient (down to 0_F) with accessory kit with complete Infinity system. MODEL NUMBER NOMENCLATURE 1 N 2 Product Series 24=AC 2 N 4 3 A A 4 A N 5 A/N A 6 N 7 SEER 7=17 SEER 7 N 3 8 N 6 9 A/N A Variations A=Standard 10 A/N 0 Open 0=Not Defined 11 A/N 0 Open 0=Not Defined 12 N 3 Voltage 3=208/230 1 13 N 0 Minor Series 0, 1, 2. Product Major Tier Family Series A=RES N=Infinity A=Puron AC Series Cooling Capacity ISO 9001:2000 24ANA7 the environmentally sound refrigerant REGISTERED As an Energy StarĀ® Partner, Carrier Corporation has determined that this product meets the ENERGY STARĀ® guidelines for energy efficiency. Refer to the combination ratings in Product Data for system combinations that meet Energy Star guidelines. STANDARD FEATURES Feature