Tube Heater Parts Search Already know your model? To get the correct part for your tube heater, you will need the following information.1. Model Series (XTS, HL, DTHS….)2. Date of ManufactureDate code is part of the serial number. Serial Number Identification Serial Number Chart sample burner box tag Model Series DTHS SeriesMBHVersion DateInstallation Manual DTH40-10011/86 & PriorpdfDTHS40-1001984 & PriorpdfDTHS40-1001985 to 11/86pdf DTH(S)-240-10011/86 to 01/87pdfDTH(S)-240-10001/87 to 04/92pdfDTH(S)-240-10004/92 to 01/01pdfDTH(S)-2125, 1501988 to 1989pdfDTH(S)-31251989 to 1994pdfDTH(S)-31501990 to 1994pdf XTS SeriesMBHVersion DateInstallation Manual XTSAll08/99 to 05/03pdfXTSAll06/03 to 04/05pdfXTSAll05/05 to 04/08pdf XTS3All07/07 to 07/12pdf DX SeriesMBHVersion DateInstallation Manual DXAll01/93 to 05/04/95pdfDXAll05/04/95 to 09/95pdfDXAll09/95 to 08/00pdf DX-2All09/00 to 05/03pdfDX2All06/03 to 08/14pdfDX2All09/14 to PresentpdfDX3All07/08 to 09/12pdfDX3All10/12 to 07/14pdfDX3All08/14 to 12/16pdfDX3LAll06/15 to Presentpdf HL SeriesMBHVersion DateInstallation Manual HLAll01/94 to 05/04/95pdfHLAll05/04/95 to 09/95pdfHLAll09/95 to 09/00pdf HL-2All09/00 to 08/02pdfHL-2All08/02 to 06/03pdfHL2All06/03 to PresentpdfHL3All07/08 to 09/12pdfHL3All10/12 to 07/14pdfHL3All08/14 to Presentpdf LS SeriesMBHVersion DateInstallation Manual LSAll06/00 to 12/12pdfLSAll12/12 to 2014pdfLS3All12/13 to 10/16pdf LS3All11/16 to Presentpdf LD SeriesMBHVersion DateInstallation Manual LDAll06/00 to 12/12pdfLDAll12/12 to 2014pdfLD3All12/13 to 10/16pdf LD3All11/16 to Presentpdf DES SeriesMBHVersion DateInstallation Manual DESAll05/00 to 06/03pdfDESAll06/03 to 04/05pdfDESAll05/05 to 06/07pdf DES3All05/06 to 06/09pdfDES3All07/09 to 9/12pdfDES3All10/12 to 08/14pdfDES3All08/14 to Presentpdf DET SeriesMBHVersion DateInstallation Manual DETAll06/03 to 04/05pdfDETAll05/05 to 06/07pdfDET3All08/06 to 06/09pdf DET3All07/09 to 09/12pdfDET3All10/12 to 08/14pdfDET3All08/14 to Presentpdf