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PART III: OPERATION
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Fasten VB screw when the adjustment is accomplished.
Depending on the boiler application, it is possible to act on the holes (figure B) to improve the flame stability and NOx, CO emission
values. If necessary, close/open the holes in figure “B” using the screws kit given with the burner.
Attention! if it is necessary to change the head position, repeat the air and fuel adjustments described above.
CAUTION: perform these adjustments once the burner is turned off and cooled.
“all-ahead” position
“all-backwards” head position
VRT
X
x = 10 mm
A
B
A
B