Unigas H365X, Руководство по установке, использованию и обслуживанию

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PART III: OPERATION
39
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"
position. 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: loosen the VB screw and slightly move the combustion head backwards, turning clockwise the knob
VRT. Fasten VB screw when the adjustment is accomplished.
The diffuser position must be set during the commissioning according to the regulation needs. The diffuser position is factory set as
shown in figure ”A” (x = 10 mm)
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.
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.
VRT
VB
“all-ahead” position “all-backwards” head position
X
x = 10 mm
A
B
A
B