Removing And Installing Head Assembly - Sunfire SF-150 Operating Manual

REMOVING / INSTALLING HEAD ASSEMBLY
WARNING: Only attempt to handle burner components after the unit has fully cooled down.
Components can be hot and could cause severe personal injury.
NOTE: You will need to remove the burner assembly for inspection of the nozzle and electrodes.
To remove the burner assembly:
1. Remove the four nuts securing the burner assembly to the outer cone of the heater.
2. Pull gently to remove the burner assembly from the outer cone of the heater, taking care not to
disconnect any wiring.
3. If nozzles or electrodes are in need of replacement, gently prop the burner assembly on the heater
tank to allow access to nozzle assembly, again taking care not to disconnect any wiring.
To remove the nozzle assembly:
1. Loosen, and then rotate the two screw clamps securing the ignitor plate in place. Swing the ignitor
plate open.
2. Unscrew the oil line fitting and thumb nut at the burner housing. (Figure 2B)
3. Remove the retention head (Figure 2A).
4. Gently push the nozzle assembly through the front of the burner.
5. Handle the nozzle assembly with care to avoid bending/moving the electrodes, or damaging the
electrode ceramic insulators and spinner assembly.
6. Inspect the gasket on the bottom of the ignitor cover. The gasket prevents air from escaping from the
housing. Replace the gasket if not in good condition.
7. Inspect the ignitor contact clips. Clean or replace if necessary to ensure reliable contact with the
electrodes.
User's Manual: Radiant Heater
SECTION 3: MAINTENANCE
FIGURE 2B: OIL LINE FITTING
3-1