MODINE Heater BDP 400

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.

Describe any issues found with the burner ports and pilot burner orifices.

Air Shutters and Main Burner Orifices

Inspect the air shutters and main burner orifices for cleanliness.

Blower Bearings Inspection and Maintenance

Check blower bearings for unusual wear

Lubricate blower bearings as per manufacturer's recommendations

Check drive sheaves for alignment

Ensure drive sheaves are securely fastened to blower and motor shafts

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 burner retaining pins

Lower bottom pan to expose burner and manifold (see fig. 16.2)

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 2 screws holding the manifold to the heat exchanger support

Check the following components for proper assembly

Clear any foreign matter from fan blades