38
3.5 - BUNER PRESSURE
ADJUSTMENT
Unscrew the sampling point cap.
Insert the analyser sensor into the sam-
pling point and adjust the burner to test
to low flame operation (test mode). Read
the percentage of CO
2
, which must be
between 8,9 and 9,2%. If its value is not
included between these values, adjust
it by using the adjusting screw A (see
fig. 20) you can get after removing by
an ALLEN wrench the screw cap on the
gas valve. By turning it clockwise, the
CO
2
percentage increases, while it de-
creases anticlockwise. Follow the same
procedure to adjust the other burners.
If the CO
2
percentage is too low, check
if the air and smoke ducts are not ob-
structed. If they are not obstructed, check
if the burner and/or the exchanger (alu-
minium sections) are well cleaned.
WARNING!
The burner can be adjusted only when
operating at low flame.
Fig. 19
Smoke sampling point
Fig. 19
Fig. 20
A
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