Riello 40 FS - Air Pressure Switch

20063732
22
GB
Start-up, calibration and operation of the burner
6.4 Air pressure switch
Adjust the air pressure switch (Fig. 19) after performing all other
burner adjustments with the air pressure switch set to the start of
the scale.
With the burner operating at minimum output, turn the knob coun-
ter-clockwise, increasing its value until the burner switches off.
Then turn the knob anticlockwise to an extent that is around 20%
of the adjusted value and then check that the burner starts up
properly. If the burner locks out again turn the knob slightly in an
anticlockwise direction.
WARNING
In conformity with the standard, the air pressure
switch must prevent the air pressure falling below
80% of the adjusted value and the CO in the flue
gases exceeding 1% (10,000 ppm).
To check this, insert a combustion analyser in the
flue, slowly reduce the burner air setting (for ex-
ample with a piece of cardboard) and verify that
the burner locks out before the CO value in the
flue gases exceeds 1%.
Fig. 19
D7404