CALIBRATION OF THE AIR PRESSURE SWITCH (P.A.)

The air pressure switch checks the minimum air pressure of the fan.
The help of a combustion analyser will be necessary fot the setting;
then proceed like follows:
Note: The calibration of the air pressure switch shall be done
in the first stage.
A) Obstruct the air inlet gradually without changing the position
of the shutter, until you obtain a defect of air: CO<=10.000 ppm.
B) Turn the regulation collar of the pressure switch slowly until
you obtain the safety lock-out of the burner.
C) Open completely the air inlet and start the burner.
D) Repeat point A) and control the intervention
of the air pressure switch

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