Krack 5-Fan Ammonia Evaporator. Model: DTX5S-1400-DXA-HGC-LH. Refrigerant: R-717 (ammonia). Rated capacity per 10°F temperature change for a 40°F room: 116200 BTUH, or 9.7 tons. Design utilizes hot gas defrost. Rated CFM: 21500. Design psig: 350 PSI. Coil material of construction: galvanized steel. Coil surface area: 4450 Sq. ft. Number of fans: 5. Fins per inch: 4. (5) Century Electric fan motors: 1/2 hp, 460V, 60 Hz, 3 phase. Controls feature: Square D Company Safety Switch Ct. no. MU-361-RB and thermal overload protection on motors. Approximate overall dimensions: 13 ft. 6 in. L x 2 ft. 11-5/8 in. W x 3 ft. 2-1/2 in. H.(H15).