• 100 Series - Oil fired uses LDR for Sensing the Flame.
  • 200 Series - Gas fired uses Flame Rods for Sensing the Flame.
  • 300 Series - Gas fired uses UV Sensor for Sensing the Flame.
  • 700 Series - Oil / Gas Fired uses LDR or Flame Rod or UV Sensor for Sensing the Flame.
  • DD Series - DD 810 / DD 817 Oil or Gas fired Controllers.

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