50WCA018BAA4AA-A
50 = Packaged WSHP Unit
WC = 1-Stage (Compact)
A = Horizontal, Side Filter Access. Front Left Water Conn
018 = 1.5 Ton 
B = Horizontal, Right Return, Left Discharge
A = UPM/50 VA
A = No Refrig Circuit Options, Non-Coated Copper Air Coil
4 = 265-1-60
A = No Sound, Standard Insulation
A = No Hydronic Options
- = No Options
A = Initial Release