AO Smith Circulating Water Heaters BTP-200-300

DANGER! Burn hazard. Hot water discharge. Keep clear of Temperature-Pressure Relief Valve discharge outlet.

It is recommended that the Temperature-Pressure Relief Valve should be checked to ensure that it is in operating condition every 6 months.

When checking the Temperature-Pressure Relief Valve operation, make sure that (1) no one is in front of or around outlet of Temperature-Pressure Relief Valve discharge line, and (2) that water discharge will not cause any property damage, as water may be extremely hot. Use care when operating valve as valve may be hot.

Check if the pressure relief valve seats properly and operates freely.

If after manually operating the valve, it fails to completely reset and continues to release water, immediately close the cold water inlet to the water heater and drain the water heater.

Replace the Temperature-Pressure Relief Valve with a properly rated/sized new one.

If the Temperature-Pressure Relief Valve on water heater weeps or discharges periodically, this may be due to thermal expansion.

NOTE: Excessive water pressure is the most common cause of Temperature-Pressure Relief Valve leakage. Excessive water system pressure is most often caused by 'thermal expansion' in a 'closed system.'

The Temperature-Pressure Relief Valve is not intended for the constant relief of thermal expansion.

Turn off the electrical supply to the water heater

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. Then close the hot water faucet

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

Ensure the drain hose is secured before and during the entire flushing procedure. Flushing is performed with system water pressure applied to the water heater

Open the water heater drain valve to flush the storage tank

Flush the water heater storage tank to remove sediment and allow the water to flow until it runs clean

Close the water heater drain valve when flushing is completed

CAUTION! Property Damage Hazard. Avoid water heater damage. Inspection and replacement of anode rod required.

The anode rod is used to protect the tank from corrosion. Most hot water tanks are equipped with an anode rod. The submerged rod sacrifices itself to protect the tank. Instead of corroding tank, water ions attack and eat away the anode rod. This does not affect water's taste or color. The rod must be maintained to keep tank in operating condition.

Anode rod deterioration depends on water conductivity, not necessarily water condition. A corroded or pitted anode rod indicates high water conductivity and should be checked and/or replaced more often than an anode rod that appears to be intact. Replacement of a depleted anode rod can extend the life of your water heater.

Inspection should be conducted by a qualified technician, and at a minimum should be checked annually after warranty period.

Artificially softened water is exceedingly corrosive because the process substitutes sodium ions for magnesium and calcium ions. Use of a water softener may decrease the life of water heater tank.

The anode rod should be inspected after a maximum of three years and annually thereafter until condition of anode rod dictates its replacement. Anode replacement is not covered by warranty.

NOTE: artificially softened water requires the anode rod to be inspected annually.

Enter the water conductivity reading

WARNING! Explosion Hazard: Flammable hydrogen gases may be present. Keep all ignition sources away from faucet when turning on hot water. Do not smoke or have open flame or sparks in vicinity of heater. Do not mix UNLIME with other chemicals. Do not allow with magnesium, aluminum or galvanized metals.

CAUTION! Chemical Hazard: Product contains phosphoric acid. Keep out of reach of children. Use rubber or neoprene gloves. Contains phosphoric acid In case of external contact, flush with cool water If irritation persists, get medical attention If swallowed, give 1 or 2 glasses of water or milk and Fall physician. Get immediate medical attention for eyes Keep out of reach of children.

NOTE: THE USE OF RUBBER OR NEOPRENE GLOVES IS RECOMMENDED, ESPECIALLY IF YOU HAVE ANY OPEN SORES OR CUTS TO AVOID UNNECESSARY IRRITATION OR DISCOMFORT.

Turn off fuel and/or power supply to heater. Also, turn off power to any electrical device or equipment, which is attached, or part of the system.

Open hot water side of faucet closest to heater and allow water to run until it is cool enough to handle safely.

Close cold water inlet valve to heater.

Connect hose to drain valve at bottom of heater and start draining heater into suitable floor drain area.

Remove pressure relief valve while heater is draining.

If pressure relief valve appears to be limed-up, place it in a clean glass or plastic container adequate in size so that you can pour enough UN•LIME® into container to cover the valve and allow space for foaming. When foaming stops, run fresh cool water into the container and rinse the pressure relief valve for a few minutes.

Keep the area around the burner clear and free of combustible materials, gasoline or other flammable liquids or vapors.

Do not obstruct burner air openings or ventilation grilles for combustion air.

The main burner flames should be visually checked once a year for proper operation. This can be observed through the observation port on the burner housing. Burner flame should be blue.

DO NOT use the observation port on the side of the tank to inspect the burner flame.

Add a few drops of no. 20 non-detergent oil (BTP-139/A thru -370/A) into the oil tubes once every three months.

At least annually, contact a qualified service technician for a burner readjustment, cleaning and other than routine maintenance.

Should the main burner or burner air openings require cleaning, remove the burner and clean with a soft brush.

Clean main burner orifice with a suitable soft material.

Sign off on the 1 Yearly Burner Check