Valve,Burner-15K,LP,EXT,SVCE (Dual Fuel)
  NOTE:   Use Starting With Serial #18184607 And
          Also Between #18137068 and #18138008
          From #17000000 to #18184607 Except
          Between #18137068 and #18138008 See
          812594
          Prior to #17000000 See 816438.