21
GB
Start-up, calibration and operation of the burner
5
Minimum gas pressure switch
Adjust the minimum gas pressure switch after having per-
formed all other burner adjustments with the pressure switch
set to the start of the scale (Fig. 27).
With the burner operating at maximum output, increase adjust-
ment pressure by slowly turning the relative knob clockwise
until the burner locks out.
Then turn the knob anticlockwise by 2 mbar and repeat the
burner start-up to ensure it is regular.
If the burner locks out again, turn the knob anticlockwise again
by 1 mbar.
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