Flue draught in mm water gauge
1.7.
1.65 Flickering flame
1.6 buzzing/roaring
noise
1.4 Satisfactory operation
1.25
1.0
0.9 Weak smoky flame
0.6
1 2 3 4 5 6
Position of the oil metering valve control knob
Flue draught in inches water gauge
Flue draught in mm water gauge
0.086 .2.2.
Flickering flame
0.078 2.0 buzzing/roaring
noise
0.059 1.5 Satisfactory operation
0.051
1.3
0.039 1.0
0.035
0.9 Weak smoky flame
0.019 0.5
1 2 3 4 5 6
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