750-368
CBEX Elite 100-1200 HP
8-9
8.7 — Oil Burner Maintenance
8.6.3 — Checking Loss of Flame
With the burner in normal operation, shut off the main burner fuel supply to extinguish main flame.
The fuel valve(s) will be de-energized and the relay will signal the condition within 4 seconds. The control will
then lock out on a safety shutdown. The flame failure light (and optional alarm) will be activated. The blower
motor will run through the post-purge and stop.
Turn the burner switch off. Reset the safety switch. Re-establish main fuel supply.
The flame detector lens should be cleaned as often as
operating conditions demand. Use a soft cloth moistened
with detergent if necessary.
FIGURE 8-6. Main Gas Train
8.7 — Oil Burner Maintenance
The burner should be inspected for evidence of damage due to improperly adjusted combustion. Any soot buildup
on the diffuser or the oil nozzle should be removed. The positioning of the oil nozzle in relation to the diffuser and
other components is important for proper firing and should be checked. See Section 6.19 in Chapter 6.
8.7.1 — Light Oil Strainers
The fuel oil strainer screen must be removed and cleaned at regular intervals. It is advisable to remove the screen
each month and clean thoroughly by immersing it in solvent and blowing it dry with compressed air. To remove,
loosen the cover cap screw, being careful not to lose the copper gasket. If necessary, tap the strainer cover gently
to loosen. Check the cover gasket for damage and replace if necessary. Slip pliers into the cross on the top of the
strainer and twist counter-clockwise to remove the basket. Reassemble in reverse order.
8.7.2 — Cleaning the Oil Nozzle
The design of the burner should be kept operationally clean when firing on oil. A routine check and any necessary
cleaning should be made during off periods or when the burner is firing on gas.
NOTE: All oil strainers should be cleaned frequently to maintain a free and full flow of fuel.
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