PART III: OPERATION
35
Adjusting the combustion head
Only if necessary, change the combusiton head position: to let the burner operate at a lower output, loose the
VB
screw and move pro-
gressively back the combustion head towards the MIN position, by turning clockwise the
VRT
ring nut. Fasten
VB
screw when the
adjustment is accomplished.
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.
VRT
VB
“MAX” head position
”MIN” head position
Содержание K890A
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