From inside (document excerpt):
25HNA9 Infinityt 19 Series Heat Pump with Puronr Refrigerant Size 24 2 Tons Nominal Product Data INDUSTRY LEADING FEATURES / BENEFITS Energy Efficiency S 17.5–19 SEER/13.1–14.1 EER/8.4 — 9.2 HSPF 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 Silencert System II for sound as low as 69 dBA Quiet mount split post compressor grommets Quiet External Silencer muffler Exclusive Silencer Top design Electronic ECM 8 pole PSSC ball bearing outdoor condenser fan motor Forward-swept condenser fan blade Compressor sound hood Laminated steel compressor mounting plate Quiet Shift Defrost the environmentally sound refrigerant Carrier’s heat pumps with Puron r refrigerant provide a collection of features unmatched by any other family of equipment.
The 25HNA9 has been designed utilizing Carrier’s Puronr refrigerant. The environmentally sound refrigerant allows consumers 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. S Reliability, Quality and Toughness S Two–Stage 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 S Long–line accessory connections S Suction Line Accumulator S Vapor fog eliminator S Ideal Defrost Controls and Diagnostics S Infinityt Control (MUST be used, no substitutes) S Utility Interface Connection S Up to 18 point diagnostic capability Applications S Long–line — up to 250 ft. total equivalent length, see S Long Line Guide for more information Low ambient (down to 0_F) with complete Infinityt system Limited Warranty S 10–year limited warranty on compressor S 5–year limited warranty on all parts MODEL NUMBER NOMENCLATURE 1 N 2 2 N 5 3 A H Product Family H = RES HP 4 A N Tier n= infinity Series 5 A/N A Major Series A = Puron 6 N 9 SEER 9=19 SEER 7 N 2 8 N 4 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 Series 25 = HP Cooling Capacity ISO 9001:2000 the environmentally sound refrigerant REGISTERED 25HNA9 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 Puron Refrigerant Up to 19 SEER Second Generation Infinity System Two Stage Scroll Compressor Weather Armor Ultrat Silencer System IIt Field Installed 16 cu. in. Filter Drier Loss of Charge Switch High Pressure Switch Back Seating Service Valves Internal Pressure Relief Valve Internal Thermal Overload Long Line Accessory Connections Long Line capability Low Ambient capability Up to 18 Point Diagnostics Quiet Shift Defrost Vapor Fog Eliminator Ideal Defrost 24-30 X 2 PHYSICAL DATA UNIT SIZE SERIES.