5. Pound out dents and weld minor breaks in the blower housing.
6. Straighten a bent damper blade and adjust the air damper to position In relation to the control linkage.
7. Replace a defective part.
d. Air Damper Positioning. Position the air damper (Fig. 46) to the control linkage in such a manner that in the open
position, the lower end of the control linkage will be nearest the blower housing.
e. Reassembly. Refer to Fig. 44 and reassemble the blower in reverse order of removal.
f. Installation. Refer to Fig. 47 and install the blower motor and blower wheel to the blower housing.
58. Burner Electrode Adjustment
a. Removal for Adjustment. Refer to Para. 56 and remove the drawer assembly
1. Loosen screws in ignition electrode clamps (Fig. 42, Item 11).
2. Remove Ignition cables from electrodes and remove electrodes.
b. Cleaning and Inspection
1. Clean the electrodes with an approved cleaning solvent and dry thoroughly. Remove any carbon deposits that
may have formed on the electrodes.
2. Inspect for broken electrodes, both metal and ceramic portions. Inspect for other damage
3. If the electrodes or the nozzles are defective, replace the defective parts.
c. Adjustment Refer to Fig. 42 and adjust the burner electrodes in the drawer assembly.
d. Installation. Refer to Para. 56 and install the drawer assembly.
e. Electrode Spark Inspection.
1. Refer to Para. 13 and start the hot oil heater.
2. Refer to Fig. 45 and view the electrode spark through the rear plate viewer assembly Spark should be a bright
blue if electrodes are properly adjusted.
3. If spark is red or yellow, or any other color than bright blue, readjust the ignition electrodes (See a through d,