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6 Operating Control and Displays
Fig. 6-61 Stage 1 adjustment
9. Set the operating point of the first stage and save the point.
10. Set the two switching points ’1 2’ and ’2 1’ in the fields on the right.
The switching points must be above the first stage, otherwise they are not stored.
11. Use the cursor to move the red-yellow dot to the 2
nd
stage.
The valve for the 2
nd
stage remains closed.
12. Use the cursor to move the red-yellow dot to the switch-over point from the 1
st
stage to the
2
nd
stage (in this case: 420 digit).
– Check whether the flame burns stably up to the switch-over point.
Adjust the switch-over point if necessary.
– If the switch-over point is exceeded, the valve is switched on for the 2
nd
stage.
Fig. 6-62 Switching point adjustment
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