PART III: OPERATION
33
Adjusting the combustion head
The combustion head position affects the flame stability.The burner is factory-adjusted with the combustion head in its "all-ahead" posi-
tion. Laboratory tests have shown that this is the optimal configuration to assure flame stability. If different settings are required, it is
possible to change the position: move the combustion head backwards, turning clockwise the screw VRT.
CAUTION: perform these adjustments once the burner is turned off and cooled.
Attention! if it is necessary to change the head position, repeat the air and fuel adjustments described above.
“all-ahead” position
“all-backwards” head position
VRT
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