Heater,Glasswell SVCE (BI-42SD,ICB-42SD,BI-48SD,
          ICBBI-48SD
  NOTE:   Use From Serial #4452000 to #4452030
          And Also Starting With Serial #4520000.
          Prior to Serial #4452000 And From
          With #4452030 to #4520000 See 7013874