1997 Evapco 3-Fan Evaporator. Model: TFC3-8184-150P. Refrigerant: R-717 (Ammonia). Nominal capacity: 42.1 tons. Fins per inch: 5. Coil rows: 8. Tube diameter: 1 in. Design pressure: 250 psi. Tube and fin material of construction: galvanized steel. Number of fans: 3 . Number of motors: 3. Fan diameter: 3 ft. 6 in. (3) Toshiba high efficiency motors, 1.5 hp , 1160 rpm, 230/460V. Unit has hot gas defrost coil only and is designed for 35ºF room temperature. Inlets/outlets: (2) 1-1/2 in. dia. port. (1) 3 in. dia. port. Overall dimensions: 18 ft. 2-5/8 in. L x 4 f t. 5 in. W x 6 ft. 7 in. H.(ACN262)(H15).