Measuring O
2
min. values by reducing air
1. Select desired point from previous menu level by pressing the
Select -/+
buttons
during burner operation. Press
Enter
.
2. Select third line
P-Air Man
by pressing the
Select -/+
buttons, and press
Enter
. The
display changes as follows:
Point27 ver. 4
3. Second line shows residual oxygen level. You can reduce air by pressing the
Select -/+
buttons. Larger value at
P-Air Man
means larger air throttle.
O
2
min. value surface is verified by throttling air and measuring CO level at the
same time.
4. When desired oxygen level is reached, accept the value by pressing
Enter
. Exit by
pressing
Esc
. Repeat for each curve point.
Start setting O
2
ratio control after O
2
min. value control is set.
4.22 Setting O
2
trim control (WD200)
O
2
min. value
O2Control
must be set first.
It is important that environmental conditions do not change when setting O
2
trim
control.
If you change the curves at a later date, O
2
trim control must also be
adjusted.
The first curve point from which O
2
trim control begins is preset at curve point 2. That
is the first point to be set for O
2
trim control. At this point burner control calculates low
capacity settings for O
2
trim control. At lower capacity burner operates according to
ratio curve, without O
2
trim control.
1. Select
O2 Control
from the following menu level:
Params. & Display
O2Contr/Guard
Fuel Settings
O2 Control
2. The first O
2
trim control point is curve point 2.
At lower capacity burner operates according to ratio curve.
Confirm the selection by pressing
Enter
. The burner runs to point 2 capacity.
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