Lochinvar Water Heater CGN275100

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?

Do you need to replace the anode rods?

Obtain two new nipple collars, part no. 74060, if necessary

Burner Characteristics Verification

Are all burner characteristics evident?

Check that burner venturi and ports are free of foreign matter

Clean burners with bristle brush and/or vacuum cleaner

Reinstall burners in unit ensuring correct installation in support brackets

Air Flow and Area Clearance Check

Shut off gas supply to the heater

Remove outer cover plate from lower side of heater jacket

Remove hex head screws securing tank cleanout plate

Remove lime, scale, or sediment carefully

Inspect cleanout plate gasket for damage

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 water heater

Record the depth of lime buildup in inches

Select the lime accumulation scenario

Is deliming required more frequently than once a year?

Read and follow handling instructions on the deliming product label