Beckett CG15 Manual page 29

Figure 21 — Damper Actuator Cams & Scale
• The cam numbers are degree of angle of the burner's air damper plate (0 to 130).
• 0 is completely closed and 105 is full air. 106 to 130 is actually less air (the damper begins to revert to a more closed position).
CG15, CG25, CG50 Burner Manual, Form No. 6104BCG50
This is the actual position indicator.
When the burner is in low and high
this indicator should match your cam
setting. (Example: this is at 0)
Red Cam: High Fire
• This number should be the
highest setting.
Blue Cam: Low Fire
• This number should be the
lowest setting.
Orange Cam: Transition
• As the damper motor goes from low to
high, this cam engages a switch that
powers the high fuel valve.
• This number should be the
middle setting.
Orange Cam Adjustment Screw:
• As you turn the screw, the cam number
setting changes.
Section: Start Up And Operation — 29