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Point Type Buttons: ï After positioning the actuator(s), press the appropriate button to save the point on the graph. a. PointóPress 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. LightoffóPress to save the lightoff position on the graph. An ëLí is displayed on the graph to indicate the lightoff point. Only one lightoff point is allowed per curve. c. MaxóPress to save the maximum modulation position on the graph. An ëMí is displayed on the graph to indicate the maximum modulation point. Only one maximum modulation point is allowed per curve. d. MinóPress to save the minimum modulation position on the graph. An ëmí is displayed in the graph to indicate the minimum modulation point. Only one minimum modulation point is allowed per curve. e. PurgeóPress to save the air purge position on the graph. A ëPí is displayed on the graph to indicate the air purge point. Only one air purge point is allowed per curve. 3. Delete: a. Delete PositionóPress to delete a point on the curve. To delete the point, you must position the cursor on the point. b. Delete All PositionsóPress 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: ï 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. ï If you want to stop the system at any time during the commissioning process, use the Stop Modulation button. 5. Previous Point/Next Point ï Press these buttons to move the actuators along the curve to a previously set position. Use these buttons to reposition the cursor or to ëwalk the curveí and verify system operation. As the curve is verified, the color of the curve changes. ï Curve segments will be displayed in red when not validated. You must ëwalk the curveí 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 ìMove Along the Curveî buttons.