Inspection and Maintenance
8-8
750-91 (revised 2009)
Model CB-LE Packaged Boiler Manual
4. Reassemble in reverse order.
8.7.3 — Heavy Oil Strainers
Keep the cartridge of the oil strainer clear by regularly giving the exterior handle one complete turn in either direc-
tion. Do this often until experience indicates the frequency of cleaning necessary to maintain optimum condition
of flow. If the handle turns hard, rotate the handle back and forward until it can be turned through a complete rev-
olution. Do not force it with a wrench or other tool.
Drain the sump as often until experience indicates the draining frequency necessary to maintain optimum condi-
tion. Remove the sump, or the head and cartridge assembly, for thorough cleaning and inspection at frequent inter-
vals. Exercise care not to damage the cartridge discs or the cleaner blades. Wash the cartridge in solvents. Do not
attempt to disassemble the cartridge.
8.7.4 — Cleaning the Oil Nozzle
The design of the burner, together with the oil purge system on a heavy oil burner, make it unnecessary to clean the
oil nozzle during periods of operation. A routine check and any necessary cleaning should be made during off peri-
ods or when the burner is firing on gas.
If at any time the burner flame appears “stringy” or “lazy,” it is possible that the nozzle tip or swirler has become
partially clogged or worn. Any blockage within the tip will cause the air pressure gauge to increase above its normal
value.
FIGURE 8-2. Standard Burner Nozzle Components
Disassemble with the power off:
1. Unlatch and withdraw the burner gun.
2. Insert the nozzle body into the hanger vise and use the spanner wrench to remove the tip.
3. Carefully remove the swirler and seating spring being careful not to drop or damage any parts.
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