A.O. Smith AOSRE50100 owner manual Relief Valve, Anode ROD Maintenance, Replacement Parts

MAINTENANCE

Electric water heater maintenance consists of cleaning the tank bottom and removing scale from the heating elements. Your dealer should be contacted for tank and element cleaning. In some instances a hissing sound may be heard as the scale builds up. This noise is normal although the scale should be removed.

Periodically the temperature and pressure relief valve should be checked to insure that it is in operating condition. Lift the lever at the top of the valve several times until the valve seats properly and operates freely.

At least once a year, the temperature and pressure relief valve must be checked to ensure that it is in operating condition. Lift the lever at the top of the valve several times until the valve seats properly and operates freely.

If water does not flow, valve may be obstructed or corroded. Remove valve and inspect for corrosion. Have it replaced with the recommended valve if necessary.

Removal and inspection of the valve should be done every three years. Do not try to repair valve. Doing so will result in improper operation which may result in a tank explosion. In areas with poor water conditions, it may be necessary to remove and inspect the T&P valve more often than every three years.

RELIEF VALVE

The temperature/pressure (T&P) relief valve is rated at 210°F (99°C) and 150 psi (1034kPa). This valve is a safety device to protect against abnormally high temperature and pressures.

Never remove T&P valve from the tank and reinstall in the drain line. If replacement of the valve is needed, it must be replaced with the recommended valve and installed in its original location.

If the temperature/pressure relief valve discharges periodically, this may be due to thermal expansion in a closed water supply system. Contact the water supplier or local plumbing inspector on how to correct this situation.

A thermal expansion tank may be needed to allow water to expand. Expansion tanks are available from A.O. Smith Water Products Company, 5621 W. 115th Street, Alsip, IL 60803. Inspect the unit for proper operation. Do not ignore the water discharge. Never plug the T&P relief valve.

DANGER

DANGEROFPERSONALINJURYFROMSCALDING. WATERFROMT&P RELIEFVALVEMAYBEEXTREMELYHOTANDISNOTTEMPERED. USE EXTREMECAUTIONWHENDISCHARGINGVALVE. REPLACEMENTOF T&P VALVE SHOULD BE DONE BY A TRAINED PROFESSIONAL OR A LICENSEDPLUMBINGCONTRACTOR.

ANODE ROD MAINTENANCE

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

Anode deterioration depends on water conductivity, not necessarily water condition. It may be necessary to have the anode rod inspected a few times during the first year to see what effect the water has had. A corroded or pitted anode rod, in the first year, indicates high water conductivity and should be checked and or replaced more often than an anode rod that appears to be fairly clean. Inspection should be conducted by a qualified technician.

REPLACEMENT PARTS

Replacement parts may be ordered through dealers, authorized servicers or distributors. Refer to Yellow Pages for where to call or contact the Water Products Company, 5621 West 115th Street, Alsip, IL 60803, 1-800-433-2545. When ordering parts, specify complete model no., serial no., (see rating plate), quantity and name of part desired. Standard hardware items should be purchased locally.

TROUBLE SHOOTING ELECTRIC WATER HEATERS

PROBLEM	CAUSE	SOLUTION
WATER LEAKS (SEE LEAKAGE CHECKPOINTS	IMPROPERLY SEALED HOT OR COLD	TIGHTEN THREADED CONNECTIONS
ON PAGE 10	SUPPLY CONNECTIONS, RELIEF VALVE
	OR THERMOSTAT THREADS
	LEAKAGE FROM OTHER APPLIANCES	INSPECT OTHER APPLIANCES NEAR WATER
	OR WATER LINES	HEATER
LEAKING TEMPERATURE & PRESSURE RELIEF	THERMAL EXPANSION IN CLOSED	INSTALL THERMAL EXPANSION TANK (DO NOT
VALVE	WATER SYSTEM	PLUG T & P RELIEF VALVE)
	IMPROPERLY SEATED VALVE	CHECK RELIEF VALVE FOR PROPER OPERATION
HOT WATER ODORS (CAUTION:	HIGH SULFATE OR MINERAL	DRAIN AND FLUSH HEATER THOROUGHLY, AND
UNAUTHORIZED REMOVAL OF THE ANODE(S)	CONTENT IN WATER SUPPLY	REFILL
WILL VOID THE WARRANTY. FOR FURTHER	BACTERIA IN WATER SUPPLY
INFORMATION, CONTACT YOUR DEALER.)		CHLORINATE WATER SUPPLY
	POWER SUPPLY TO HEATER IS NOT	TURN DISCONNECT SWITCH ON OR CONTACT
NOT ENOUGH OR NO HOT WATER	ON	ELECTRICIAN
	THERMOSTAT SET TOO LOW	REFER TO TEMPERATURE REGULATION
	HEATER UNDERSIZED	REDUCE HOT WATER USE
	INCOMING WATER IS UNUSUALLY	ALLOW MORE TIME FOR HEATER TO REHEAT
	COLD (WINTER)
	LEAKING HOT WATER FROM PIPES OR	HAVE PLUMBER CHECK AND REPAIR LEAKS
	FIXTURES
	HIGH TEMPERATURE LIMIT SWITCH	CONTACT DEALER TO DETERMINE CAUSE: SEE
	ACTIVATED	TEMPERATURE REGULATION
WATER TOO HOT	THERMOSTAT SET TOO HIGH	REFER TO TEMPERATURE REGULATION
	HIGH TEMPERATURE LIMIT SWITCH	CONTACT DEALER TO DETERMINE CAUSE: SEE
	ACTIVATED	TEMPERATURE REGULATION
	SCALE ACCUMULATION ON ELEMENTS	CONTACT DEALER TO CLEAN OR REPLACE
	SEDIMENT BUILD-UP ON TANK	ELEMENTS
WATER HEATER SOUNDS		DRAIN & FLUSH THOROUGHLY
	BOTTOM

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