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9.C Proper Pilot Flame
To view the pilot flame, the cover must be unlocked
and removed. A properly adjusted pilot should have a
blue, steady flame with an inner cone that engulfs 3/8”
- 1/2” of the pilot ignitor sensor. See Figure 45 The
pilot ignitor sensor should glow bright orange from the
heat and the flame current should be 1.0 μA to 1.8 μA.
NOTE: To read flame current see Section "8.E View
Current Settings" on page 35
If the pilot flame is over sized, orange in color, and
blowing far beyond the pilot ignitor sensor then the
pilot is over fired. The flame current will read outside
of the nominal range of 1.0 μA – 1.8 μA and the
pilot should be adjusted down using the valve's pilot
adjustment screw, shown in Figure 42.
If the flame is small and the inner cone does not
engulf the pilot ignitor sensor then the pilot is under
fired. When the pilot is under fired the pilot ignitor
sensor does not glow bright orange. The flame current
will read below 1.0 μA and should be adjusted up to a
value between 1.0 μA and 1.8 μA.
NOTE: If the flame current reads below 0.8 μA the
control will continue to spark as it does not
recognize an acceptable flame current.
Figure 42. The Gas Valve Adjustment
Figure 43. Unlocking the Cover
Open
Closed
Gas Supply
Gas Valve
Gas Pilot
Figure 44. Without the Front Cover
Figure 45. Pilot Flame Example
NOTE: Flame Current reading will remain in the display
for 30 seconds to allow for pilot adjustment.
LAARS Heating Systems
