S7999B SYSTEM DISPLAY
65-0283—2
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Fig. 31. Set Actuator Max Open Endpoint.
Fig. 32. Set Actuator Max Close Endpoint.
Curve Commissioning
The Commission Curve screen for Fuel 1 or Fuel 2 is used to:
• Enter points on the graph to indicate the Air Purge position,
Lightoff position, Maximum and Minimum modulation
positions, and intermediate positions for the actuators for
the specified fuel (Fuel 1 or Fuel 2).
• Create a curve that provides safe and efficient operation of
the burner from minimum to maximum modulation.
• Verify the profile that was created.
• Save the profile you created to a default curve if desired.
The following buttons are displayed on the screen:
1.
Fuel/Air/FGR:
• Open/Close—Press one of these buttons to
manually open or close the actuator the number of
degrees indicated in the drop-down box (from 0.1 to
10). When you are positioning actuators, while any
actuators are below 20%, you can only move the
actuator 3 degrees at a time. This is a safety
constraint.
2.
Point Type Buttons:
• After positioning the actuator(s), press the
appropriate button to save the point on the graph.
a. Point—Press to save positions on the curve that are
between the max and min modulation points. A point
is displayed on the graph each time you press this
button. You need at least 5 intermediate points
between the max and min modulation points on a
curve for a valid profile, except for builds 185 and
higher.
b. Lightoff—Press to save the lightoff position on the
graph. An ‘L’ is displayed on the graph to indicate
the lightoff point. Only one lightoff point is allowed
per curve.
c. Max—Press to save the maximum modulation
position on the graph. An ‘M’ is displayed on the
graph to indicate the maximum modulation point.
Only one maximum modulation point is allowed per
curve.
d. Min—Press to save the minimum modulation
position on the graph. An ‘m’ is displayed in the
graph to indicate the minimum modulation point.
Only one minimum modulation point is allowed per
curve.
e. Purge—Press to save the air purge position on the
graph. A ‘P’ is displayed on the graph to indicate the
air purge point. Only one air purge point is allowed
per curve.
3.
Delete:
a. Delete Position—Press to delete a point on the
curve. To delete the point, you must position the cur-
sor on the point.
b. Delete All Positions—Press to delete ALL positions
on the curve, including the lightoff, air purge, max
and min modulation points. Use this button ONLY
when you want to start creating the curve from the
beginning.
4.
Start Lightoff/Stop Modulation:
• This button serves a dual purpose. Pressing this
button activates the burner controller lightoff
sequence. If the lightoff sequence is successful, this
button then displays
Stop Modulation
. If the lightoff
sequence fails, the
Status
window indicates the
problem.
• If you want to stop the system at any time during the
commissioning process, use the
Stop Modulation
button.
5.
Previous Point/Next Point
• Press these buttons to move the actuators along the
curve to a previously set position. Use these buttons
to reposition the cursor or to ‘walk the curve’ and
verify system operation. As the curve is verified, the
color of the curve changes.
• Curve segments will be displayed in red when not
validated. You must ‘walk the curve’ to verify system
operation with the curve.
NOTE: The S7999B requires you to enter at least 3 points
(inclusive of the min and max modulation points) to
use the “Move Along the Curve” buttons.
