48FCFM24A3A5-6F0A0
48FC = Gas Heat Packaged Rooftop
F = High Heat
M = Single Circuit, Two Stage Cooling Models 
24 = 20 Tons
A = No Smoke Detector or CO₂ Sensor
3 = Direct Drive, Eco Blue, High Static Option 
A = Al/Cu - Al/Cu
5 = 208/230-3-60
6 =  Electro-mechanical Controls-can be used with W7220 EconoMi$er X(with Fault Detection and Diagnostic)
F = Enthalpy Economizer with Barometric Relief
0 = No Convenience Options
A = No Electrical Options
0 = Standard Packaging