Advanced Distributor Products Unit Heater SEP−115-A

Turn off both electrical and gas supply to unit

Disconnect combustion air inducer wiring

Remove screws securing flue box to unit

Is it necessary to remove blower assembly from flue box?

Combustion Air Inducer Motor Bearings

Verify that combustion air inducer motor bearings are pre-lubricated and sealed

Check for manufacturer's lubrication instructions on each motor

Re-lubricate fan motor bearings if no manufacturer's instructions are provided

Apply a few drops of SAE No 10 non-detergent oil to motors with oiling ports

Inspect the combustion air inducer for any visible damage or wear

Use a small brush to clean the inducer wheel

Is the combustion air inducer clean and free of debris?

Verify thermostat calls for heat

Check if combustion air inducer starts immediately

Ensure combustion air pressure switch proves inducer operation

Confirm no adjustment is necessary for the factory-set switch

Ignition and Gas Valve Operation

Record prepurge duration in seconds

Verify spark ignition is energized

Vent and Vent Connector Inspection

Check all vent and vent connector joints for tightness

Are there any blockages in the vents?

Dispose of any debris or waste found during inspection