1. Set the Controller’s Enable/Disable switch to the Enable position, then disconnect AC power
from the unit.
2. Remove the side and rear panels from the unit.
3. Disconnect the ignition cable and ground wire from the igniter-injector.
4. Referring to Figure 6.3-1, disconnect the compression nut securing the gas injector tube of
the igniter-injector to the elbow of the ignition assembly. Disconnect the ignition assembly
from the igniter-injector.
5. Loosen and remove the igniter-injector from the burner plate.
6. Check the igniter-injector for evidence of erosion or carbon build-up. If there is evidence of
substantial erosion or carbon build-up, the igniter-injector should be replaced. If carbon build-
up is present, clean the component using fine emery cloth. Repeated carbon build-up is an
indication that the combustion settings of the unit should be checked. Refer to Chapter 4 for
combustion calibration procedures.
7. Prior to reinstalling the igniter-injector, apply a high temperature, conductive, anti-seize com-
pound to the threads.
8. Install the igniter-injector on the intake manifold flange. Use the number of clocking washers
required to rotate the Ignitor-Injector so that the injector tube is outside the approximately
120° arc shown in Figure 6.3-2.
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