Lochinvar Water Heater CGN200100

Verify damper operation sequence

Is there a problem with the water heater operation in AUTOMATIC OPERATION position?

Does the water heater operate in HOLD OPEN DAMPER position?

Refer to EFFIKAL RVGP-FSF-SERIES TROUBLESHOOTING GUIDE if needed

Refer to Troubleshooting Sections and Operational Checklist if needed

Measure the depth of lime buildup in the heater

Record the depth of lime buildup in inches

Is the lime buildup 1/2 inch or less?

Is the lime buildup 2 inches or more?

Set the deliming schedule based on lime buildup

Read and follow handling instructions on the deliming product label

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

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

Turn off the manual gas control valve to the appliance

Ensure the appliance is completely powered off

Locate the sensing element in the hot water storage tank

Remove the old storage tank temperature control

Install the new storage tank temperature control

Is the new temperature control properly calibrated?