2002 York/Frigid Coil Roof-Top Freezer / Evaporator. Model RTFSL-442-B-3-FL-HGU-IP-PCV. Refrigerant: flooded R-717 (ammonia). Nominal capacity: 21 tons with a -32ºF entering temperature and a 12ºF TD. Volume: 7.82 cubic ft. Surface area: 3960 sq. ft. Airflow: 33,600 cfm. Fans: (2) 36 in. diameter propellers. (2) Baldor industrial motors, 5 hp, 1160 rpm, 230/460 V. Coil design pressure: 250 psi. Coil construction: hot dipped galvanized steel tubes and fins. Hot gas defrost. Left hand coil. Frigid Coil panel, Model: HLA-ACP-DA. Electrical requirements: 460 V, 15 amps, 60 Hz, 3 phase. Connections: (1) 2-1/2 in. liquid ammonia line, (1) 4 in. suction outlet/ hot gas inlet, (1) 1-1/4 in. hot gas condensate outlet and (1) 3 in. drain line. Overall dimensions: 14 ft. 2 in. L x 9 ft. 5 in. W x 8 ft. H. (ACN390)