Maximum permitted values: CO = 4000 ppm, #2 on the Shell-Bacharach scale.
Values may vary depending on the type of the configuration.
If you change the ratio curves at a later date, the minimum value must
also be readjusted.
O2 min. value direct entry
1. Select
O2 Monitor
from menu as follows:
Params. & Display
O2Contr/Guard
Fuel Settings
O2 Monitor
2. If the limit values of a plant are known, O2 min. values can be entered directly to
curve points during burner operation.
The first line shows curve point number. Scroll through points by pressing the
Select -/+
buttons. By pressing
Enter
twice, you can enter residual oxygen level as
percentages to the second line. Use the
Select -/+
buttons.
Point26 ver. 4
3. Accept the value by pressing
Enter
. Exit by pressing
Esc
.
Measuring O2 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.
O2 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 O2 ratio control after O2 min. value control is set.
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