17
11 Checking the combustion values, adjust the air flow rate acting on the
VSB
screw (Fig. 10-Fig. 13); screw to decrease the flow rate
and unscrew to increase it.
12 Turn the burner off and then on again.
Fig. 13
Adjusting the combsution head
Turn VRTclockwise or counterclockwise, according to the output to gain (minimum or maximum). If the combustion head is to be
replaced,
the position on Fig. 16 (Tab. 2) must be observed, according to the nozzle end.
Attention!
change the head position only if necessary. If it is necessary to change the head position, repeat the air and gas
adjustments as described above.
Fig. 14
Fig. 15
-
+
VBS
VRT
VRT
ID
