From inside (document excerpt):
25HCR3C Comfortt 13 Series R 22 Coastal Heat Pump 2 to 5 Nominal Tons (Size 24 To 60) Product Data INDUSTRY LEADING FEATURES / BENEFITS Efficiency S 13 SEER/ 10.8 EER / 8.0 — 8.5 HSPF (nominal) S Microtube Technologyt refrigeration system S Indoor air quality accessories available Sound S Sound level as low as 74 dBA S Compressor sound blanket Comfort S System supports Thermidistatt or standard thermostat controls Reliability S Armor Platet coil corrosion protection S Front–seating service valves S Scroll compressor S Accumulator S Internal pressure relief valve S Internal thermal overload S High pressure switch S Loss of charge pressure switch S Defrost control S Filter drier S Balanced refrigeration system for maximum reliability Durability WeatherArmort protection package: S Solid, Durable sheet metal construction S Steel louver coil guard S Color matched ceramic coated cabinet screws S Baked–on, complete coverage, powder paint Applications S Long–line — up to 250 ft.
total equivalent length, up to 200 ft. condenser above evaporator, or up to 80 ft. evaporator above condenser (See Longline Guide for more information.) S Low ambient (down to –20_F) with accessory kit Warranty S 10 year limited compressor warranty S 5 year limited parts warranty MODEL NUMBER NOMENCLATURE Product Family H = RES HP 4 A C Tier C=Comfort 5 A/N R Major Series R = R 22 6 N 3 SEER 3=13 SEER 7 N 3 8 N 6 9 A/N C Variations C = Coastal 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 REGISTERED 25HCR3C As an Energy Star® Partner, Carrier Corporation has determined that this product meets the ENERGY STAR® guidelines for energy efficiency. Refer to the combination ratings in Product Data for system combinations that meet Energy Star guidelines. STANDARD FEATURES Feature 13 SEER Scroll Compressor Louvered Coil Guard Field Installed Filter Drier Front Seating Service Valves Internal Pressure Relief Valve Internal Thermal Overload Long Line capability Low Ambient capability with Kit High Pressure Switch Loss of Charge Pressure Switch ArmorPlatet Condenser Coil Protection Accumulator