A.O. Smith HYB-90N Maintenance, Housekeeping, Venting System Inspection, Anode Rod Inspection

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MAINTENANCE

MAINTENANCE

HOUSEKEEPING

Vacuum around base of water heater for dust, dirt, and lint on a regular basis.

VENTING SYSTEM INSPECTION

At least once a year a visual inspection should be made of the venting system. You should look for:

1.Obstructions which could cause improper venting. The combustion and ventilation air flow must not be obstructed.

2.Damage or deterioration which could cause improper venting or leakage of combustion products.

Be sure the vent piping is properly connected to prevent escape of dangerous flue gasses which could cause deadly asphyxiation.

Obstructions and deteriorated vent systems may present serious health risk or asphyxiation.

Chemical vapor corrosion of the flue and vent system may occur if air for combustion contains certain chemical vapors. Spray can propellants, cleaning solvents, refrigerator and air conditioner refrigerants, swimming pool chemicals, calcium and sodium chloride, waxes, bleach and process chemicals are typical compounds which are potentially corrosive.

If after inspection of the vent system you found sooting or deterioration, something is wrong. Call the local gas utility to correct the problem and clean or replace the flue and venting before resuming operation of the water heater.

BURNER OPERATION AND INSPECTION

Flood damage to a water heater may not be readily visible or immediately detectable. However, over a period of time a flooded water heater will create dangerous conditions which can cause DEATH, SERIOUS BODILY INJURY, OR PROPERTY DAMAGE. Contact a qualified installer or service agency to replace a flooded water heater. Do not attempt to repair the unit! It must be replaced!

At least once a year a visual inspection should be made of the main burner and spark generator assembly for proper flame characteristics and ignition sequences. You should also check for sooting. Soot is not normal and will impair proper combustion. Soot build-up indicates a problem that requires correction before further use. Turn “OFF” gas to water heater and leave off until repairs are made, because failure to correct the cause of the sooting can result in a fire causing death, serious injury, or property damage.

INSTALLED IN SUITABLE AREA: To insure sufficient ventilation and combustion air supply, proper clearances from the water heater must be maintained. See “Facts to Consider About Location” section. Combustible materials such as clothing, cleaning materials, or flammable liquids, etc. must not be placed against or adjacent to the water heater which can cause a fire.

ANODE ROD INSPECTION

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 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. A water softener can affect the life of the anode installed in this water heater. 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 the warranty period.

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Contents HYBRID GAS WATER HEATERS For Your SafetyPOWER VENT GAS MODELS Installation and Operating ManualIMPORTANT INFORMATION TABLE OF CONTENTSIMPORTANT DEFINITIONS SAFE INSTALLATION, USE AND SERVICEGENERAL SAFETY DANGER INTRODUCTION Page GET TO KNOW YOUR WATER HEATER - GAS MODELS REPLACEMENT PARTS AND DELIMING PRODUCTSROUGH IN DIMENSIONS INSTALLATION CONSIDERATIONSINSTALLATION REQUIREMENTS FOR THE COMMONWEALTH OF MASSACHUSETTS Water Potable Heating All models are considered WATER PIPING - MIXING VALVE USAGEFACTS TO CONSIDER ABOUT LOCATION HANDLE INSTALLATION Access To EARTHQUAKE ZONESTop Casing Front ScrewsAPPLIANCES IN UNCONFINED SPACES COMBUSTION AIR AND VENTILATIONAPPLIANCES IN CONFINED SPACES B. ALL AIR FROM OUTDOORS See Figures 12, 13 and THERMAL EXPANSION CHEMICAL VAPOR CORROSIONWATER PIPING CLOSED WATER SYSTEMSTEMPERATURE-PRESSURE RELIEF VALVE HARD WATERT&P Valve and Pipe Insulation if supplied SEDIMENT TRAPS GAS PIPINGFILLING THE WATER HEATER HIGH ALTITUDE INSTALLATIONSGAS LINE PURGING FLOODING/FREEZINGVENT PIPE TERMINATION If using 2 inch vent pipePLANNING THE VENT SYSTEM ELBOW STRAP If using 3 inch vent pipeRODENT SCREEN INSTALL INTO ELBOW GROUND LEVEL OR MAXIMUM SNOW LINE TERMINATION ELBOWCONDENSATION WARNING INSTALLATION OF VENT SYSTEMVENT TERMINAL INSTALLATION, SIDEWALL CONDENSATEINSTALLATION SEQUENCE SEQUENCE OF INSTALLATIONSVent terminals supplied with heater must be used INSTALLATION OF VERTICAL VENT SYSTEM INSTALLATION OF VENT SYSTEM, SIDEWALLVENT PIPE PREPARATION STEP A RECOMMENDED BRUSH* SIZE FOR PRIMER AND CEMENT APPLICATIONSSTEP B STEP G CONNECTION TO VENT PIPE U.S. POWER VENTSTEP E STEP FVENT HOODS MAY BE EXTREMELY HOT DURING OPERATION “OFF”, “up” ELECTRICAL CONNECTIONSCALIBRATION FIGURE 33aDISPLAY PANEL OPERATING INSTRUCTIONSNumeric Display CAUSE IMPROPER AND DANGEROUS CAUTION LABEL ALL WIRES PRIOR TODISCONNECTION WHEN SERVICING CONTROLS. WIRING ERRORS CANTO TURN OFF GAS TO APPLIANCE LIGHTING INSTRUCTIONSFOR YOUR SAFETY READ BEFORE LIGHTING OPERATING INSTRUCTIONSSTATE HEAT CYCLE DEFINITIONSDESCRIPTION TEMPERATURE REGULATION Temperature Probes UNIQUE HYBRID FEATURESWater Circulation Pump Line Voltage Monitor OPERATIONAL CONDITIONS CONSTANT OUTPUT TEMPERATURE CONTROLDetection of Failure to Maintain Desired Constant Temperature START UP CONDITIONSBURNER OPERATION AND INSPECTION MAINTENANCEHOUSEKEEPING VENTING SYSTEM INSPECTIONMOTORS ANODE ROD REPLACEMENTCLEANING THE INLET WATER FILTER TEMPERATURE-PRESSURE RELIEF VALVE OPERATIONFLUSHING THE HEAT EXCHANGER LIME BUILD- UP CLEANING THE HEAT ENGINEDRAINING THE TANK FAULT INDICATION AND ERROR CODESDisplayed DIAGNOSTIC DISPLAYDiagnostic Code andRemedy FaultLockout CauseDescription FaultLockout CodeDescription TROUBLESHOOTING system installed, or there is a WHEN THE TAP IS OPENEDCheck if there is any error code on b.The unit display is an error codeLEAKAGE CHECKPOINTS SERVICEITEM # PARTS IDENTIFICATIONA Baffle, Flue B Hot Water Outlet Nipple w/ Anode, Heat Trap AB C DEF G T SH R I Q P KIT # REPLACEMENT PARTS DESCRIPTIONCONDITIONS AND EXCEPTIONS LIMITED RESIDENTIAL GAS WARRANTYSERVICE AND LABOR RESPONSIBILITY CLAIM PROCEDUREPage Page 500 TENNESSEE WALTZ PARKWAY ASHLAND CITY, TN PHONE 1-800-433-2545 FAX