Heat Exchanger,Fre SVCE (501F,601F,601F-2,601F-3)
  NOTE:   DOES NOT INCLUDE FULL LENGTH OF ARMAFLEX
          INSULLATION,IF NEEDED ALSO ORDER 1400500
  501F    Use From M/P1104940 to M/P1105139.
          Use From M/P1204490 to M/P1212289.
          Use Starting with M/P1212490.
          See 7016028 for additional serial breaks
  601F    Use Regardless of Serial Number.