MODINE Heater BD 125

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.

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

Check that all the parts are in place

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

Inspect burner ports and pilot burner orifices for cleanliness

Inspect air shutters and main burner orifices for cleanliness

Clean heat exchanger tubes from the bottom with a stiff non-wire brush

Check heat exchanger for cracks and discoloration of the tubes

If a crack is detected, has the heat exchanger been replaced?

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

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