Lochinvar Condensing Boiler FBL0751

Flue Vent System and Air Piping Inspection

Inspect the flue gas venting system and air piping for issues

Repair any joints that show signs of leakage

Verify that air inlet pipe is connected and properly sealed

Verify that boiler vent discharge and air intake are clean and free of obstructions

Air and Vent Termination Screens

Check air and vent termination screens for cleanliness and obstructions

Inspect the relief valve and lift the lever to verify flow

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, were they removed or were air and vent lines reinstalled per the 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.

Test boiler water according to the Crest Installation and Operation Manual guidelines.

Does the test indicate the need for cleaning the system water?

Clean system water with approved system restorer following the manufacturer’s information.

Document any issues found during the test.

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?

If contaminants cannot be removed, have the air and vent lines been reinstalled per the manual?

Check pressure/temperature gauge

Enter the current pressure reading from the gauge

Enter the current temperature reading from the gauge

Is the pressure within the normal operating range?