Lennox Rooftop Unit LGH092

Turn off the electrical power to the unit

Turn off the gas supply to the unit

Remove the burner compartment access panel

Remove screws securing burners to burner support

Lift the entire burner assembly from the orifices

Remove the combustion air inducer assembly as described in the Combustion Air Inducer subsection.

Clean the flue box with a wire brush as required.

Clean the tubes with a wire brush.

Reassemble the unit, ensuring the following gaskets are replaced

Ensure all necessary tools and materials are available, including a hand grease gun and lithium base grease.

Select the lithium base grease to be used

Use a hand grease gun for relubrication.

Add grease until a bead appears at the seal lip contacts.

Is there a bead of grease at the seal lip contacts?

Ensure no excess grease is left on the bearing surface.

Label all wires prior to disconnection

Ensure all necessary tools and equipment are available

Check and replace filters as necessary

Disconnect controls following labeled wires

Inspect control wiring for damage

Reconnect controls ensuring correct wiring

Inspect the following components for corrosion, deterioration, or debris

Remove any obstructions or blockages found during inspection

Refer to Figure 5, Figure 6, or Figure 7 for detailed diagrams