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From inside (document excerpt):
24ACB4 Comfortt Series 14 Air Conditioner with Puronr Refrigerant 1 1/2 to 5 Tons (Sizes 18 To 60) Product Data INDUSTRY LEADING FEATURES / BENEFITS Efficiency S 14 SEER / 11.5 — 12.0 EER S Microtube Technologyt refrigeration system S Indoor air quality accessories available Sound S Sound level as low as 72 dBA S Compressor sound blanket Comfort S System supports Thermidistatt or standard thermostat controls Reliability S Puronr refrigerant — environmentally sound, won’t deplete the ozone layer and low lifetime service cost.
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the environmentally sound refrigerant Carrier 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. S Front–seating service valves S Scroll compressor S Internal pressure relief valve S Internal thermal overload S Low pressure switch S High pressure switch 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 Baked–on, complete outer coverage, powder paint S Color matched ceramic coated screws Applications S Long–line — up to 250 feet (76.2 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.) S Low ambient (down to -20_F/-28.9_C) with accessory kit MODEL NUMBER NOMENCLATURE 1 N 2 Product Series 24=AC 2 N 4 3 A A Product Family A=RES AC 4 A C Tier 5 A/N B Major Series 6 N 4 SEER 4=14 SEER 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. Cooling Capacity C=Comfort B=Puron ISO 9001:2000 24ACB4 the environmentally sound refrigerant REGISTERED 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. Installation of this product should follow all manufacturing refrigerant charging and air flow instructions. Failure to confirm proper charge and air flow may reduce energy efficiency and shorten equipment life.