Maintenance Procedures

Check Burner Flame

Flame Signal

Inspect the burner flame through the obser- vation port on the burner mounting plate.

If flame pattern is not fully blue and covers the entire burner surface, shut the unit down and allow it to cool thoroughly.

Close the manual gas valve on the gas sup- ply line and disconnect the gas piping to remove the burner assembly from the unit.

Remove the burner head mounting screws and remove the burner head. Inspect the head for deterioration. Use compressed air or a vacuum to clean the burner head.

Remove the venturi and gas valve assem- bly from the blower.

Use the vacuum cleaner or compressed air to clean the interior of the blower assembly. Inspect the blower blades to ensure they are clean and not damage.

Re-assemble the venturi and gas valve onto the blower. Ensure the venturi gasket is in good condition and positioned correctly.

Re-assemble the burner head onto the mounting plate. Ensure the burner head gasket is in good condition and positioned correctly.

Re-assemble the gas supply connection and open the manual gas valve placing the unit back into service.

The flame signal should be at least 0.6∝ Α. Refer to the PERFORMANCE PLUS Trouble-shooting Guide for information on checking the flame signal.

Check the ignitor for fouling or damaged insulation if a low flame signal is read.

Check ground wiring and continuity as a cause for low flame signal. Replace igni- tor if ground and continuity conditions are satisfactory.

Check Combustion Levels

Refer to page 53 of this manual for mea- suring combustion levels and burner adjustments.

Review With Owner

Ensure the owner understands the impor- tance to perform the maintenance schedule specified in this manual.

Remind the owner of the importance to call a licensed contractor should the unit or sys- tem exhibit any unusual behavior.

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Delta PG PLUS-25 warranty Check Burner Flame Flame Signal, Check Combustion Levels, Review With Owner