1994 Evapco Low Temperature Ammonia Evaporator Blast Coil. Model: TFC20-663123-15. Approximate capacity: 110 tons or 1,327,200 BTUH at a 11.7 TD, -27.3°F coil temperature and a -45°F SST. Refrigerant: bottom feed ammonia (R-717). (4) fans, 15 hp, 1750 rpm, 460V, 60 Hz, 3 phase. This unit features the exclusive, Thermal-Pak finned coil with blow-through design at 92,000 cfm. Coil date: 3 FPI and 12 rows deep, 40 cu. ft. volume, 133 sq. ft. face area. Inlets: 2 in. hot gas, 2 in. liquid inlet and hot gas relief and 8 in. suction. Approximate shipping weight: 17,800 lbs. Overall dimensions: 25 ft. 8 in. L x 5 ft. 9-1/2 in. W x 6 ft. 2 in. H.(ACN495).