MODINE Heater PD 125

Blower Bearings Inspection and Maintenance

Check blower bearings for unusual wear

Were the blower bearings lubricated according to manufacturer's recommendations?

Were any blower bearings replaced?

Check drive sheaves for alignment

Check drive sheaves are securely fastened

Inspect belts for wear and tension

Lower bottom pan to expose burner and manifold (see fig. 13.1)

Disconnect pilot tubing and thermocouple lead (or ignition cable) at the combination gas control (and ignition control)

Disconnect control wires for the combination gas control

Disconnect gas manifold at ground union joint

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

Keep the unit free from dust, dirt, grease, and foreign matter.

Combustion Air and Exhaust Vent Piping

Inspect the combustion air and exhaust vent piping for cleanliness.

Burner Ports and Pilot Burner Orifices

Inspect the burner ports and pilot burner orifices for cleanliness.

Note any issues found during inspection of burner ports and pilot burner orifices.

Air Shutters and Main Burner Orifices

Inspect the air shutters and main burner orifices for cleanliness.

Burner and Pilot Assembly Removal

Lower bottom pan to expose burner and manifold

Disconnect pilot tubing and thermocouple lead or ignition cable at the combination gas control and ignition control

Remove the two burner retaining pins

Motor Inspection and Lubrication

Is the motor permanently lubricated?

Check the motor for lubrication if not permanently lubricated

Check the fit of the fan on the motor shaft

Clean any dust, dirt, or foreign matter from the fan blades