3.If the nozzle is already installed, remove the noz- zle line assembly to verify that the nozzle size and spray pattern are correct for the application (per ap- pliance manufacturer’s information). Verify that the electrode tip settings comply with Figure 3.
4.If the nozzle is not installed, obtain a nozzle from the manufacturer, having the capacity and spray angle specified in the appliance manufacturer’s in- formation. For conversions or upgrades, when in- formation is not available for the application:
yRefer to Table 6 to select the
yFire the burner and make sure the combustion is acceptable and the flame is not impinging on chamber surfaces.
yIf a shorter flame is needed, select a wider spray angle. If a longer flame is needed, select a nar- rower spray angle.
yEither hollow or solid spray patterns may be used. If combustion results are not satisfactory with the selected spray pattern, try the other pattern.
Table 6. Nozzle Spray Angles
Recommended nozzle spray angles
“F” head | 70° or 80° nozzle |
“L1” & “L2” head | 45°, 60°, or 70° nozzle |
“V1” head | 45°, 60°, or 70° nozzle |
Check/adjust electrodes
Check the electrode tip settings. Adjust if neces- sary to comply with the dimensions shown in Fig- ure 3. To adjust, loosen the electrode clamp screw and slide/rotate electrodes as necessary. Securely tighten the clamp screw when finished.
Servicing nozzle line assembly
1.Turn off power to burner before proceeding.
2.Disconnect oil connector tube from nozzle line.
3.Loosen the two screws securing igniter retain- ing clips and rotate both clips to release igniter baseplate. Then tilt igniter back on its hinge.
4.Remove splined nut.
5.“F” head air tube. - Remove nozzle line as- sembly from burner, being careful not to damage the electrodes or insulators while handling. To ease removal of long assemblies (over 9 inches), rotate assembly 180° from installed position after pulling partially out of tube.
6. “L1”, “L2”, and “V1” head air tubes. - Slide nozzle line assembly forward (further into air tube) so the head clears the venturi opening. Then rotate the nozzle line assembly 90° so the nozzle line end points up. Pull the nozzle line assembly toward you and remove assem- bly from burner.
7.To replace the nozzle assembly, reverse the above steps.
Prepare the Burner
Figure 3. – Electrode Tip Adjustment
Standard Dimensions for F, L1, and V1 Heads.
The Dimensions shown below are for use with L2 heads and M series air tube combinations ending with an ‘N’ suf- fix (example: AFG70MDAQN)
Mount burner on appliance
Mounting options
1.Bolt the burner to the appliance using the fac-
Mounting dimensions
1.When using the Beckett universal adjustable flange, mount the air tube at a 2° downward pitch unless otherwise specified by the appli- ance manufacturer.
2.Verify that the air tube installed on the burner provides the correct insertion depth. See Fig- ure 7.
3.The end of the air tube should normally be ¼” back from the inside wall of the combustion chamber. Never allow the leading edge of the head assembly to extend into the chamber, un- less otherwise specified by the heating appli- ance manufacturer. Carefully measure the in- sertion depth when using an adjustable flange. Verify the insertion depth when using a welded flange.
6104BAFG R06 | Page 9 |
