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From inside (document excerpt):
24ANB1 Infinityt 21 2 Stage Air Conditioner with Puronr Refrigerant 2 to 5 Nominal Tons Product Data INDUSTRY LEADING FEATURES / BENEFITS Efficiency S 14.5 — 21 SEER / 11.7 — 15 EER S Microtube Technologyt refrigeration system S Indoor air quality accessories available Sound S Sound level as low as 65 dBA S Quiet mount split post compressor grommets S Electronic ECM ball bearing outdoor condenser fan S S Compressor sound hood S Laminated steel compressor mounting plate Comfort S System supports Infinityt Control or standard 2–stage thermostat controls motor Forward-swept condenser fan blade Reliability S Puronr refrigerant — environmentally sound, won’t S 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 Controls and Diagnostics S Infinityt control (Dedicated A,B,C,D only) S Utility Interface Connection S Up to 18 point diagnostic capability Durability WeatherArmort protection package: deplete the ozone layer and low lifetime service cost.
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2-stage scroll compressor Carrier’s Air Conditioners with Puronr refrigerant provide a collection of features unmatched by any other family of equipment. The 24ANB1 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. This product has been designed and manufactured to meet Energy Starr criteria for energy efficiency when matched with appropriate coil components. 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 Solid, Durable sheet metal construction S Steel louver coil guard S Baked–on, complete outer coverage, powder paint 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.) Low ambient (down to 0_F) with complete Infinity system. S MODEL NUMBER NOMENCLATURE 1 N 2 2 N 4 3 A A Product Family A=RES AC 4 A N Tier N= Infinity 5 A/N B Major Series B=Puron 6 N 1 SEER 1=21 SEER Nominal 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 Series 24=AC Cooling Capacity 24ANB1 the environmentally sound refrigerant Use of the AHRI Certified TM Mark indicates a manufacturer’s participation in the program For verification of certification for individual products, go to www.ahridirectory.org. 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. STANDARD FEATURES FEATURES Puron Refrigerant Maximum SEER Rating* 2 Stage Scroll Compressor Crankcase Heater w/Temperature Switch Low Ambient Capability to 0_F ( 17.8_C) w/Infinity Control Enhanced Diagnostics w/Infinity Control Utility Interface Connection Louvered Coil Guard Field Installed Filter Drier Front Seating Service Valves Internal Pressure Relief Valve Internal Thermal Overload Long Line Capability Low Pressure Switch High Pressure Switch Sound Blanket X = Standard * With approved combinations Unit Size Voltage, Series 24 30 X 21.0 X 36 30 X 20.0 X 48 30 X 17.7 X 60 30 X 16.7 X X 2 REFRIGERANT PIPING LENGTH LIMITATIONS Liquid L ….. …