Vilter 4416 16-Cylinder Reciprocating Compressor. Model: 4416. Refrigerant: last used with R-717 (ammonia). Nominal capacity: 186 tons at 203 bhp with a 96.2 ˚F condensing temperature and a 20˚F suction temperature. Displacement: 619 cfm. Maximum speed: 1,200 rpm. Medium temperature compressor with liquid-cooled heads. Inlets: (1) 1 in. dia. pipe (liquid), (1) 6 in. dia. refrigerant suction port. Outlets: (1) 1 in. dia. pipe (liquid), (2) 3 in. dia. refrigerant discharge ports. Overall dimensions: 6 ft.1-1/2 in. L x 3 ft. 5 in. W x 5 ft. 10 in. H. (ACN387a).