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N. FUEL OIL NOZZLE
The position of the fuel oil atomizer affects its ability to atomize the oil. The compressed air
atomizer or low pressure atomizer should be positioned as shown in Figure 9.
To change the low pressure oil nozzle position:
1. Shut off the manual oil valve at the burner. The burner must not be firing and the atomizing
air fan must be shut off.
2. If heated heavy oil is being used, allow the oil in the pipe to cool to avoid burns. Drain
residual fuel into an appropriate container.
3. Note the present orientation of the oil nozzle in the burner. Determine if the oil nozzle must
be retracted into or extended out of the primary air tube (see Figure 9).
4. Remove the bolts securing the backplate to the burner, and disconnect the pilot air pipe.
5. Loosen the jam nut on the backplate of the burner oil insert assembly.
6. Rotate the backplate to effect the required retraction or extension of the oil atomizer nozzle.
One full rotation of the backplate will move the atomizer approximately 0.1" (2.5mm).
7. Once the proper positioning of the atomizer is completed:
a. Tighten the jam nut.
b. Attach the burner oil insert assembly to the oil manifold, using the union provided.
c. Open the manual oil valve and check for leaks using accepted practices.
CAUTION
Ensure that the correct atomizer
is being used when firing oil.
Figure 9. Oil Nozzle Position
Page 21
MS-9
W7868
(NOT TO SCALE)
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