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From inside (document excerpt):
24ACB3 Comfortt13 Series Air Conditioner with Puronr Refrigerant 1 1/2 To 5 Nominal Tons (Size 18 To 60) Product Data INDUSTRY LEADING FEATURES / BENEFITS EFFICIENCY SOUND 13 – 15 SEER/11 – 12 EER Microtube Technologyt refrigeration system Indoor air quality accessories available Sound level as low as 74 dBA System supports Thermidistatt Control or standard thermostat Puronr refrigerant – environmentally sound, won’t deplete the ozone layer and low lifetime servce cost.
Front-seating service valves Scroll compressor Internal pressure-relief valve Internal thermal overload Low-pressure switch High-pressure switch Filter drier Balanced refrigeration system for maximum reliability S S COMFORT RELIABILITY the environmentally sound refrigerant DURABILITY Carrier’s Air Conditioners with Puron r refrigerant provide a collection of features unmatched by any other family of equipment. The 24ACB 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. NOTE: Ratings contained in this document are subject to change at any time. Always refer to the AHRI directory (www.ahridirectory.org) for the most up- -date ratings -toinformation. WeatherArmort protection package: S Solid, durable sheet metal construction S Steel louver coil guard Baked-on, complete coverage, powder paint Color matched cabinet screws Long-line – up to 250 feet (76.20 m) total equivalent length, up to 200 feet (60.96 m) condenser above evaporator, or up to 80 ft. (24.38 m) evaporator above condenser (See Longline Guide for more information.) Low ambient (down to -20_F/-28.9_C)) with accessory kit APPLICATIONS S WARRANTY Single Phase S 10–year limited compressor warranty S 3-Phase 5-year limited parts warranty 5-year limited compressor warranty 1-year limited parts warranty S S MODEL NUMBER NOMENCLATURE 1 N 2 2 N 4 3 A A Product Family A= RES AC 4 A C Tier 5 A/N B Major Series 6 N 3 SEER 3=13 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 5=208/230 3 6=460 3 13 N 1 Minor Series 0, 1, 2. Product Series 24 = AC Cooling Capacity C=Comfort B = Puron ISO 9001:2000 the environmentally sound refrigerant REGISTERED 24ACB3 This product has been designed and manufactured to meet Energy Star® criteria for energy efficiency when matched with appropriate coil components. However, proper refrigerant charge and proper air flow are critical to achieve rated capacity and efficiency.