(2) 2002 Krack 4-Fan Ammonia Evaporator – 7.64 Tons. Model: BTRS-414-RBA-HGC. Rated capacity: 7.64 tons at 30ºF suction temperature for a 38ºF room. Refrigerant: Recirculated bottom feed R-717 with hot gas defrost. Hot dip galvanized steel coil with steel tubing and fins, (4) rows of tubes at (4) fins per inch. Cooling area: 2,032 sq. ft. Air flow: 24,000 cfm. Stainless steel housing with hot dip galvanized steel hangers. The insulated, stainless steel drain pan is air defrost with heat tape for inner drain pan. Custom features include electric reheat and hinged side panels. (4) ½ hp fan motors. Overall dimensions: 14 ft. 7 in. L x 3 ft. 7 in. W x 3 ft. 1 in. H.(ACN95).(BI).