Fireye BurnerLogiX ZB110 Manual page 48

Once a LEARN process is activated, it cannot be undone. Also, if a LEARN cannot be com-
pleted in the subsequent burner cycle due to burner interruptions or a flame fail, the LEARN
process will continue to remain active. During PTFI, the LEARN process takes place during the
last 3 seconds of the pilot period and is indicated on the display:
During AUTO the LEARN process takes place during the first 3 seconds of AUTO and is indicated
on the display
After the LEARN process is completed the flame signal displayed value is normalized to a value of
32.
Therefore during the next pilot trial for ignition period the expected value of flame signal should be
32.
Any increases or decreases in amplitude or radiation may cause the displayed value to increase or
decrease. Should the displayed value continue to decrease, possibly due to changing conditions in the
boiler such as a bright background causing a reduction in scanner sensitivity, it is suggested to acti-
vate a new DO IR LEARN during AUTO. Without shutting the burner off, scroll to PROGRAM
SETUP and in that sub-menu, modify DO IR LEARN to YES. The LEARN function will be acti-
vated immediately. [Note: The display will continue to indicate YES even though the LEARN pro-
cess is complete. Pressing the up arrow and then down arrow will indicate the updated state of DO IR
LEARN.]
An abrupt change in the background radiation (brightness) may be an indication that the firing char-
acteristics of the fuel have changed. In oil fired units this may be caused by a sudden interruption in
the oil delivery. The BurnerLogix utilizes this information to make a decision to keep the burner on
line or force a shut down. A lockout will happen if the background radiation (brightness) changes
downward by 20% in and stays at this level for 1 FFRT. Also, if the detected flame signal average
falls below 20% of the Learned On value, the burner will also be shut down.
Keeping the Scanner Cool
The Infrared Scanner (Temperature Limit 140° F) should never get too hot to grasp comfortably in
the hand. Keep the scanner cool by one or more of the following methods.
1.
Use 6" to 8" length of pipe between scanner and hot furnace front plate.
2.
Use insulating tube (P/N 35-69) on the end of the iron pipe.
3.
Force air into sighting tube. Use Fireye Sealing Union (P/N 60-801).
4.
Make sure sighting tube does not extend more than halfway into refractory wall.
48
PTFI 80
LEARNING FLAME
HOLD 80
LEARNING FLAME
AUTO 32
FLAME SIGNAL
PTFI 32
FLAME SIGNAL
®