4.21 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.
Point2 ver. 4
3. The display changes. The second line
O2ratioCon
shows current residual oxygen
level. Wait until the level stabilizes, and corresponds with ratio curve level. The
burner control uses this level when calculating O
2
trim control settings.
Confirm the selection by pressing
Enter
.
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