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5. On FBRA18 models only, mark the water level sensor wires and disconnect them from terminals
J1-1 (upper sensor) and J1-2 (lower sensor).
6. Remove the nuts in each corner of the interface board and carefully pull the board off the mount-
ing studs, being careful not to dislodge the spacers on the studs.
7. Position the replacement board on the studs and replace the four nuts.
8. Reconnect the water level sensor wires (FBRA18 models only) and the 12-pin connector to the
interface board.
9. Rotate the component box back into position and replace and tighten the mounting screws. Re-
mount the control panel to the component box and reattach the grounding wire.
10. Reattach the 15-pin connector to the interface board.
11. Close and secure the control panel.
6.6.4 Replacing an Ignition Module
1. Unplug the rethermalizer and drain the cookpot.
2. Disconnect the ignitor wire and flame sensor wire from the right burner assembly.
3. Remove the five screws from the rear of the transformer box and pull the box out of the unit suf-
ficiently to allow the removal of the five screws in the cover of the box. Remove the cover.
4. Unplug the ignitor wire and flame sensor wire from the module to be replaced. Disconnect the
remaining wires from the ignition module one at a time and mark them to facilitate reconnection.
5. Remove the four screws securing the module in place and lift the module out of the box. Re-
move the four spacers from the back of the failed module and insert them into the holes on the
replacement module, tapered end in.
6. Reverse steps 1 through 5 to complete the procedure.
6.6.5 Replacing an Ignitor Assembly
1. Unplug the rethermalizer and drain the cookpot.
2. Remove the ignitor wire and flame sensor wire from the ignitor assembly. Disconnect the gas
enrichment tube from the assembly.
3. Remove the two mounting screws and pull the ignitor assembly out of the burner.
4. Install the replacement ignitor assembly.
5. Reconnect the ignitor wire, flame sensor wire, and gas enrichment tube.