MODINE Unit Heater PAE400

Check if motor requires lubrication

Inspect fan for fit on motor shaft

Check motor bearings for lubrication

Check blower bearings for lubrication

Inspect belt and sheaves for proper alignment

Inspect belt and sheaves for proper adjustment

Ensure the unit is free from dust, dirt, grease, and foreign matter, focusing on the following areas

Use air hose to blow dirt and foreign matter from within the burner if air pressure is available

Check main burner orifices for blockage due to spider webs or other obstructions

Clean heat exchanger tubes from bottom with stiff brush after removing burner (Do not use wire brush)

Check wiring for possible loose connections

Refer to control instruction sheets furnished separately with the unit heater for control checks

Turn off all electricity and gas to unit

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 holding the burner in place

Ensure slots at the front of the burner are located properly on their shoulder rivets when replacing

Ensure burner retaining pins are put back into their proper locations when replacing

Document any issues encountered during the procedure