Lochinvar Condensing Boiler FBN1501

Check all settings on the Setup Screen

Check settings of external limit controls (if any)

Adjust external limit controls if necessary

Record the flame signal at high fire for each combustion system

Is the flame signal at least 10 microamps?

Troubleshooting Low Flame Signal

Clean the flame sense electrodes

Is the ground wiring in good condition?

Is the ground continuity satisfactory?

Replace the flame sense electrode if necessary

Verify that boiler area is free of any combustible materials, gasoline and other flammable vapors and liquids.

Verify that air intake area is free of any contaminants.

If contaminants are present, have they been removed or air and vent lines reinstalled as per manual?

Remove the front access covers and inspect the interior of the boiler.

Vacuum any sediment from inside the boiler and components. Remove any obstructions.

Inspect the condensate drain line, vent line, condensate PVC fittings, and condensate trap.

Inspect flame through observation windows.

Is the flame satisfactory at both high fire and low fire?

Shut down the boiler following the 'To Turn Off Gas to Appliance' instructions.

Will the boiler be exposed to freezing temperatures?

Is freeze prevention fluid used in the system?

Allow boiler to cool to room temperature.

Verify all system components are correctly installed and operational

Enter the cold fill pressure for the system

Is the cold fill pressure at least 12 psi (82.7 kPa)?

Monitor the system pressure as the boiler heats up

Does the system pressure remain within safe limits during heating?

Inspect automatic air vents and air separators

Flush air vents by pressing push valve and replace caps