Lochinvar Water Heater CGN199100

Shut off gas supply to the heater

Remove outer cover plate from lower side of heater jacket

Remove six hex head screws securing tank cleanout plate

Remove lime, scale, or sediment without damaging glass lining

Unfasten two screws to burner cover and remove it

Locate the burner with pilot and remove screw holding burner to manifold

Unfasten pilot tubing from valve and slide out burner and pilot

Clean the orifice of the pilot burner

Close cold water inlet valve serving heater

Open nearby hot water faucet to relieve pressure in the heater

Check the condition of the anode rods

Is the 1/8” (3mm) diameter core wire visible?

Replace anode rods if core wire is visible

Ensure new parts are ready if needed

Seal any unused openings in the venting system

Inspect the venting system for proper size and horizontal pitch

Check for blockage, restriction, leakage, corrosion, and other deficiencies

Close all building doors and windows

Close all doors between the water heater space and other spaces

Turn on all appliances not connected to the venting system

Turn on all exhaust fans at maximum speed

Measure the depth of lime buildup in the heater

Record the depth of lime buildup in inches

Deliming Schedule Recommendation

Determine deliming frequency based on lime buildup

Review handling instructions on the deliming product label

Is deliming required immediately based on the measurement?