Air Cooled Condensing Unit. Dunham-Bush 4-Cylinder Reciprocating Compressor, Model: 50H/LF, S/N: 72K-0577-S, power supply: 230 V, 25.0 FLA, 100 LRA, 60 cycles. Fan diameter: 20 in. Electric Fan Motor, 1/2 hp, 1075 rpm, 208-230 V, 3.2 amps, 60 Hz, single phase. Evaporator, fins per inch: 11 fpi. Oil Separator- 1.5 Gallon, inside straight-wall dimensions: 6 in. dia. x 1 ft. 1/2 in. H. Receiver- 5 Gallon, inside straight-wall dimensions: 8 in. dia. x 2 ft. L. Inlet: (1) 1 in. dia. suction port. Outlet: (1) 1/2 in. dia. discharge port. Overall dimensions: 3 ft. 3 in. L x 2 ft. 6 in. W x 3 ft. 9 in. H.