Cap, Burner - 15K,18K,20K (SRT,DF,CT,CG,ICBDF,GR)
    SRT   Use regardless of Serial#
   DF/CT  Use Starting with Serial #17000000 and
          Between Serial #16050607 and #16050686
          Prior to Serial #17000000 Except Between
          Serial#16050607 and #16050686 See 804514
   CT15G  Uses 12K Burner See 808012
    GR    Use Regardless of Serial Number
    CG    Use Regardless of Serial Number