Electrode,9.2K,12K Disc SVCE (CT-2,Dual Fuel)
  NOTE:   FOR 15K BURNERS SEE 802449
  CT-2    Use From #11102581 To #17000000.
          Prior to Serial #11102581 See 815560
          Starting With #17000000 See 808135
  DF      Use Prior to Serial #17000000
          Starting With #17000000 See 808135
  SRT     See 808135