MODINE Duct Furnace DFS300AFRHN10A1

Ensure the unit is free from dust, dirt, grease, and foreign matter

Inspect the combustion air and exhaust vent piping for blockages or damage

Inspect the burner ports and pilot burner orifices for cleanliness and damage

Inspect the air shutters and main burner orifices for cleanliness and damage

Burner and Pilot Assembly Removal

Remove the burner and pilot assembly for inspection

Were the burner ports and pilot burner orifices cleaned without using hard, sharp instruments?

Filter Inspection and Maintenance

Does the unit have a dirty filter warning light?

If the dirty filter light is on, clean or replace the filters.

Check filters if there is no dirty filter warning light.

Clean or replace filters if necessary.

Describe the condition of the filters and any actions taken.

Blower Bearings Inspection and Maintenance

Check blower bearings for the following issues

Are the blower bearings in good condition?

Lubricate the blower bearings as per manufacturer's recommendations

Drive Sheaves and Belts Inspection

Inspect drive sheaves and belts for the following

Are the drive sheaves and belts in acceptable condition?

Remove the burner side access panel

Disconnect gas manifold at ground union joint

Remove the two screws holding the manifold to the heat exchanger support

Slide the manifold through the manifold bracket

Remove the burner side access panel

Remove the screws holding the burner side access panel

Disconnect the pilot supply line from the gas valve

Disconnect the ignition cable from the ignition controller