Setting The Air Pressure Switch - Bentone BG 550-2 Installation And Maintenance Instruction

5.2 Setting the air pressure switch

The air pressure switch should block the burner if the air quantity supplied
for combustion is insuffi cient. The air pressure switch must be set so that,
if there is a defective air supply at the burner's max. or min. capacity, it
reacts before the monitored pressure falls so much that it results in poor
combustion.
Inställningsområde ca:
LGW 10 1-10
LGW 50 2,5-50
Setting for air pressure switch
1. Remove the protective cover, screw (Y).
!
Be careful when adjusting the air pressure switch;
it contains a live component.
2. Start the burner.
3. Carefully turn the scale on the air pressure switch clockwise until the air
pressure switch stops the burner. Is the tolerance on the scale for
the min. air pressure switch approx. ±15%?
4. Try to fi nd the pressure at which the burner stops for both the
minimum and maximum input power by turning the scale. Make a note
of the values and then set the air pressure switch on the basis of the
highest pressure noted at which the burner stopped.
5. The air pressure switch should be set to a pressure approx. 10–15%
lower than the highest noted pressure at which the burner stopped.
6. After setting the air pressure switch, perform repeated starts and run
through the burner's set output range several times. This is to ensure
the reliable function of the burner. If breakdowns or interruptions occur,
the air pressure switch is probably set to a too narrow position.
7. Fit the protective cover, screw (Y).
mbar
mbar
Y
Y
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Bentone