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From inside (document excerpt):
25HCB6 Comfortt 16 2 Stage Heat Pump with Puronr Refrigerant 2 to 5 Tons Product Data INDUSTRY LEADING FEATURES / BENEFITS Energy Efficiency S 15.5 – 16.5 SEER/12.5 EER/9.0 – 9.5 HSPF (based on tested combinations) S Microtube Technologyt refrigeration system S Indoor air quality accessories available Sound S Sound level as low as 70 dBA S Sound level as low as 69 dBA with accessory sound shield Comfort S System supports Thermidistatt or standard 2-stage thermostat controls Reliability S Puronr refrigerant – environmentally sound, won’t deplete the ozone layer and low lifetime service cost.
S Front-seating service valves S 2-stage scroll compressor S Internal pressure relief valve S Internal thermal overload S Highpressure switch S Loss of charge switch S Filter drier S Balanced refrigeration system for maximum reliability the environmentally sound refrigerant Carrier Air Conditioners with Puron r refrigerant provide a collection of features unmatched by any other family of equipment. The 25HCB6 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. Durability WeatherArmort protection package: 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.) MODEL NUMBER NOMENCLATURE 1 N 2 Product Series 25 = HP 2 N 5 3 A H Product Family H = RES HP 4 A C Tier C= Comfort Series 5 A/N B Major Series A = Puron 6 N 6 SEER 6=16 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 13 N 0 Minor Series 0, 1, 2. Cooling Capacity 1,000 Btuh (nominal) ISO 9001:2000 the environmentally sound refrigerant REGISTERED 25HCB6 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.