A.O. Smith Gas Water Heater BTRC197

Draining the Water Heater Storage Tank

Turn off the electrical supply to the water heater

Turn off the gas supply at the Main Gas Shutoff Valve if the water heater is going to be shut down for an extended period

Ensure the cold water inlet valve is open

Open a nearby hot water faucet and let the water run until the water is no longer hot

Close the cold water inlet valve to the water heater

Connect a hose to the water heater drain valve and terminate it to an adequate drain

Open the water heater drain valve and allow all the water to drain from the storage tank

Close the water heater drain valve when all water in the storage tank has drained

Ensure all ignition sources are away from the faucet when turning on hot water.

Do not smoke or have open flame or sparks near the heater.

Do not mix UN•LIME with other chemicals.

Avoid contact with magnesium, aluminum, or galvanized metals.

Use rubber or neoprene gloves, especially if you have open sores or cuts.

Turn off fuel and/or power supply to the heater.

Open hot water side of faucet closest to heater and allow water to run until cool.

Measure the depth of lime buildup in the heater

Record the depth of lime buildup in inches

Water Temperature and Usage Assessment

Enter the current water temperature

Is the water temperature above the recommended level?

Water Softening Equipment Check

Is water softening equipment installed?

Is the water softening equipment functioning properly?

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.

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