50WCE048EBA6AA-A
50 = Packaged WSHP Unit
WC = 1-Stage (Compact)
E = Vertical, Side Filter Access, Front Left Water Conn
048 = 4 Ton 
E = Vertical, Right Return, Top Discharge
B = UPM/75 VA
A = No Refrig Circuit Options, Non-Coated Copper Air Coil
6 = 460-3-60
A = No Sound, Standard Insulation
A = No Hydronic Options
- = No Options
A = Initial Release