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A. Removal and Replacement of Gas Train (See Fig. 31
and 43.)
1. Shut off manual gas valve.
2. Shut off power to unit.
3. Remove compressor access panel.
4. Slide out burner compartment side panel.
5. Remove heat shield.
6. Disconnect gas piping at unit gas valve.
7. Remove wires connected to gas valve. Mark each wire.
8. Remove induced-draft motor, ignitor, and sensor wires
at the Integrated Gas Unit Controller (IGC).
9. Remove the 2 screws that attach the burner rack to the
vestibule plate.
10. Remove the gas valve bracket.
11. Slide the burner tray out of the unit (Fig. 31).
12. To reinstall, reverse the procedure outlined above.
B. Cleaning and Adjustment
1. Remove burner rack from unit as described in Removal
and Replacement of Gas Train section above.
2. Inspect burners; if dirty, remove burners from rack.
3. Using a soft brush, clean burners and crossover port as
required.
4. Adjust spark gap. See Fig. 44.
5. Reinstall burners on rack.
6. Reinstall burner rack as described in Removal and Re-
placement of Gas Train section above.
XI. REPLACEMENT PARTS
A complete list of replacement parts may be obtained from
your distributor upon request.
Fig. 44 — Spark Adjustment
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