Prepare the Burner
Figure 5. Check/Adjust ‘Z’ Dimension - L1 & L2 Heads
L1/L2 heads (see Table 7 and Figure 3 for dimensions)
1.See figure above. The important “Z” dimension is the distance from the leading edge of the head to the end of the air tube. This distance for L1 & L2 heads is
burners shipped with the air tube installed. Even if factory set, verify that the “Z” dimension has not been changed.
2.Use the following procedure to adjust the “Z” dimension, if it is not correct:
yTurn off power to the burner.
yDisconnect the oil connector tube from the nozzle line.
yRefer to figure. Loosen the splined nut from the nozzle line. Loosen the hex head screw securing the escutcheon plate to the burner housing.
yPlace the end of a ruler at the leading edge of the head and, us- ing a straight edge across the end of the air tube, measure the distance to the end of the tube. A Beckett T501 gauge may also be used.
ySlide the nozzle line forward or back until this dimension is
yTighten the hex head screw to secure the escutcheon plate to the burner chassis. Then tighten the splined nut and attach the oil connector tube.
3.Recheck the “Z” dimension periodically when servicing to ensure the escutcheon plate has not been moved. You will need to reset the “Z” dimension if you replace the air tube or nozzle line assem- bly.
Figure 6. Check/Adjust ‘Z’ Dimension - V1 Heads
V1 heads (see Table below and Figure above for dimensions)
1.See figure above. The important “Z” dimension is the distance from the leading edge of the head to the end of the air tube. This distance for V1 heads is
2.Use the following procedure to adjust the “Z” dimension, if it is not correct:
yTurn off power to the burner.
yDisconnect the oil connector tube from the nozzle line.
ySee figure above. Loosen the splined nut from the nozzle line. Loosen the hex head screw securing the head adjusting plate to the burner housing.
yLoosen the acorn nut. Move the head adjusting plate until the “0” lines up with the reference indicator on the housing, and retighten the hex head screw. Place the end of a ruler at the leading edge of the head and, using a straight edge across the end of the air tube, measure the distance to the end of the tube. A Beckett T501 gauge may also be used.
ySlide the nozzle line forward or back until this dimension is
yTighten the hex head screw to secure the head adjusting plate to the burner chassis. Then tighten the splined nut and attach the oil connector tube.
3.Recheck the “Z” dimension periodically when servicing to ensure the escutcheon plate has not been moved. You will need to reset the “Z” dimension if you replace the air tube or nozzle line assembly.
Set head position adjusting plate (V1 head only) | Table for initial adjusting plate settings for V1 | ||||
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1. | After setting “Z” dimension, loosen head adjusting plate hex head | V1 Adjusting | AFG with V1 |
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| screw and nozzle line splined nut. Move the nozzle line assembly until |
| Plate Setting | Head |
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| the burner reference indicator lines up with the head adjusting plate |
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| Burner Firing |
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| setting number given in Table shown below. |
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| Rates |
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2. | Tighten the hex head screw and splined nut. (DO NOT loosen the |
| 0 |
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| acorn nut when setting head position.) Refer to the manufacturer’s in- |
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| structions for OEM settings. |
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3. | The position of the head affects air flow volume and pattern. For most |
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| applications, the burner will perform satisfactorily with the air adjust- |
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| ment plate setting of Table shown below. |
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4. | If combustion results indicate the need for change, adjust the head po- |
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| sition adjusting plate forward or back one position at a time to optimize |
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| combustion. |
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6104BAFG R06 | Page 11 |
