The Frigidaire FT4BF is a two-stage heat pump with an efficiency of 16 SEER and 9 HSPF. Select models of the FT4BF meet Energy Star requirements. The two-stage Copeland Scroll UltraTech compressor is protected by a control module which monitors the compressor and can shut the system down to prevent damage, while a compressor sound blanket minimizes noise. Other features include high- and low-pressure switches, a liquid line filter dryer, and a three minute restart time delay to increase compressor life. The galvanized steel cabinet is coated with a corrosion-resistant polyester urethane finish and features a removable top grille assembly for ease of service. The FT4BF used R-410A refrigerant.
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