
MAINTENANCE
42
Burner Air Band Settings
1. Close bulk air bank (outside diameter band).
2. Set end air band between 3.5 - 4.0 on scale (see
figure 21a).
3. Open covers or dampers on exhaust stacks.
WARNING
To prevent an explosion or fire hazard: Keep
area free of sparks or open flames when
testing burners.
Check Ignition Transformer Spark
1. Turn on master power switch in rear control box.
2. Turn on Burner Power switch.
3. Hold an insulated screwdriver approximately 1
to 1-1/2 inches above the two wire springs on the trans-
former and hold the ignition switch down. It should be
possible to jump a spark across the 1 to 1-1/2 inch gap
Electrode Assembly Adjustments
1. Adjust electrode assembly per Figure 20.
NOTE: Before installing electrode assembly, check
that blower wheel turns freely and that all set screws
are tightened securely.
2. Install electrode assembly into air tube unit. Use
escutcheon plate for mounting (see Figure 21).
Electrode
Nozzle
3/16" to 1/8"
5/16" to 1/4"
3/16" to 5/32"
3"
+ 1/16"
-
Figure 19. Burner Electrode Adjustments
Hole For Fuel Line
Mounting Screw - slide plate against
mounting screw. This will position
nozzle in air tube.
Figure 20. Electrode Assembly Installation
Maintenance
Figure 21. Nozzle Adjustment