Velocity Shadow Series, Installation And Operating Instructions Manual

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71
MOUNTING NUT
FLAME ROD
(FOUR PLACES)
BURNER DOOR
IGNITION
ELECTRODE
FIGURE 13.1: FLAME IONIZATION ELECTRODE AND IGNITION ELECTRODE LOCATION
j. Unplug the ignition, ground, and flame rod wires from the ignition electrode and the flame rod (Figure 13.1).
k. Use a 10mm wrench to remove the four nuts securing the fire door to the heat exchanger (Figure 13.1). Carefully
remove the door/blower/gas valve assembly from the heat exchanger, being careful not to damage the refractory
insulation on the inside of the door (see Refractory Warning on next page) or the electrodes.
l. Inspect the heat exchanger combustion chamber and vacuum any debris found on the coil surfaces. If necessary,
the coils may be brushed with a nonabrasive, nonmetallic brush. Do not use cleaning agents, solvents, acid or alkali
products of any type to clean the heat exchanger .
m. Inspect the target wall and fire door insulation . If either shows signs of damage, it must be replaced.
n. Inspect the burner for heat damage or other deterioration. Use a non-metallic brush or source of compressed air
to clean off dust or debris from ports.
FIGURE 13.2: IGNITION ELECTRODE GAP