1990 Turbo Refrigeration HTD-Series Falling Film Plate Style Heat Exchanger. Model: HTDF481206 DX. S/N: 901220. Flow rate: 200 GPM. Input horsepower: 50 hp. Refrigeration load: 42 tons. Refrigerant: R22-DX. Refrigerant temperature: 26 °F. Standard plate size: (6) 48 in. W x 60 in. H. Fluid: water (temperature on: 41 °F, temperature off: 36 °F). Reservoir capacity: 500 gallons. HTD-series (high temperature difference) units are used when fluids are either heated or chilled over large temperatures differences ranging from 5 to 60 °F. Includes insulated sump tank. Front and back double door access. Inlets: (2) 3/4 in. dia. ports (refrigerant), (1) 3 in. dia. copper tube (water supply). Outlets: (1) 1 in. dia. discharge port, (2) 2-1/2 in. dia. tubes (refrigerant suction), (1) 5 in. dia. NPT (male, pump), (1) 5 in. dia. NPT (male, overflow). Overall dimensions: 79 in. L x 66 in. W x 10 ft. 4 in. H.