A.O. Smith HYB-90N warranty Draining The Tank, Fault Indication And Error Codes

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DRAINING THE TANK

Disconnect electrical power to the water heater.

Remove the pail of cleaning solution and replace it with a pail of clean water.

Rinse the cleaning solution from the water heater as follows:

Connect the electrical power to the water heater and run the heat engine.

Allow the clean water to flow through the heat engine for 5 minutes.

Disconnect electrical power to the water heater and circulating pump.

Disconnect the hoses from the heat engine.

Disconnect hoses and circulating pump, draining the cleaning solution into the pail.

Reconnect the original hoses to the tank.

Remove the in-line filter at the cold water inlet and clean out any residue. Assemble the filter back into the unit.

Open the shutoff valves on both the hot water and cold water lines.

Fill the tank with water.

Connect the electrical power to the water heater.

Restart water heater following lighting instructions.

DRAINING THE TANK

The water heater should be drained if being shut down during freezing temperatures. Also periodic draining and cleaning of sediment from the tank may be necessary.

1.Set the power switch to the “OFF” position.

2.OPEN a nearby hot water faucet and let the water run until it is no longer hot.

3.CLOSE the cold water inlet valve to the water heater.

4.Connect a hose to the drain valve and terminate to an adequate drain.

5.OPEN the water heater drain valve to allow for tank draining. NOTE: If the water heater is going to be shut down and drained for an extended period, the drain valve should be left open with hose connected allowing water to terminate to an adequate drain.

6.CLOSE the drain valve.

7.Follow instructions in the “Filling The Water Heater” section.

8.Follow the lighting instructions on the label or see “Lighting Instructions” in this manual to restart the water heater.

FAULT INDICATION AND ERROR CODES

A red fault LED (lighting a large red exclamation point) should be present on the display panel if a fault condition exists.

A history of the last 9 error codes along with the current error code is stored in memory and can be accessed via the maintenance mode. If the current error code is zero, “E00” shall be displayed (see Table 4).

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Contents Installation and Operating Manual For Your SafetyPOWER VENT GAS MODELS HYBRID GAS WATER HEATERSTABLE OF CONTENTS IMPORTANT INFORMATIONSAFE INSTALLATION, USE AND SERVICE IMPORTANT DEFINITIONSGENERAL SAFETY DANGER INTRODUCTION Page REPLACEMENT PARTS AND DELIMING PRODUCTS GET TO KNOW YOUR WATER HEATER - GAS MODELSINSTALLATION CONSIDERATIONS ROUGH IN DIMENSIONSINSTALLATION REQUIREMENTS FOR THE COMMONWEALTH OF MASSACHUSETTS WATER PIPING - MIXING VALVE USAGE Water Potable Heating All models are consideredFACTS TO CONSIDER ABOUT LOCATION HANDLE INSTALLATION EARTHQUAKE ZONES Access ToScrews Top Casing FrontAPPLIANCES IN UNCONFINED SPACES COMBUSTION AIR AND VENTILATIONAPPLIANCES IN CONFINED SPACES B. ALL AIR FROM OUTDOORS See Figures 12, 13 and CLOSED WATER SYSTEMS CHEMICAL VAPOR CORROSIONWATER PIPING THERMAL EXPANSIONHARD WATER TEMPERATURE-PRESSURE RELIEF VALVET&P Valve and Pipe Insulation if supplied GAS PIPING SEDIMENT TRAPSFLOODING/FREEZING HIGH ALTITUDE INSTALLATIONSGAS LINE PURGING FILLING THE WATER HEATERVENT PIPE TERMINATION If using 2 inch vent pipePLANNING THE VENT SYSTEM TERMINATION ELBOW If using 3 inch vent pipeRODENT SCREEN INSTALL INTO ELBOW GROUND LEVEL OR MAXIMUM SNOW LINE ELBOW STRAPCONDENSATE INSTALLATION OF VENT SYSTEMVENT TERMINAL INSTALLATION, SIDEWALL CONDENSATION WARNINGINSTALLATION SEQUENCE SEQUENCE OF INSTALLATIONSVent terminals supplied with heater must be used INSTALLATION OF VENT SYSTEM, SIDEWALL INSTALLATION OF VERTICAL VENT SYSTEMVENT PIPE PREPARATION STEP A RECOMMENDED BRUSH* SIZE FOR PRIMER AND CEMENT APPLICATIONSSTEP B STEP F U.S. POWER VENTSTEP E STEP G CONNECTION TO VENT PIPEVENT HOODS MAY BE EXTREMELY HOT DURING OPERATION FIGURE 33a ELECTRICAL CONNECTIONSCALIBRATION “OFF”, “up”OPERATING INSTRUCTIONS DISPLAY PANELNumeric Display CONTROLS. WIRING ERRORS CAN CAUTION LABEL ALL WIRES PRIOR TODISCONNECTION WHEN SERVICING CAUSE IMPROPER AND DANGEROUSOPERATING INSTRUCTIONS LIGHTING INSTRUCTIONSFOR YOUR SAFETY READ BEFORE LIGHTING TO TURN OFF GAS TO APPLIANCESTATE HEAT CYCLE DEFINITIONSDESCRIPTION TEMPERATURE REGULATION UNIQUE HYBRID FEATURES Temperature ProbesWater Circulation Pump Line Voltage Monitor START UP CONDITIONS CONSTANT OUTPUT TEMPERATURE CONTROLDetection of Failure to Maintain Desired Constant Temperature OPERATIONAL CONDITIONSVENTING SYSTEM INSPECTION MAINTENANCEHOUSEKEEPING BURNER OPERATION AND INSPECTIONTEMPERATURE-PRESSURE RELIEF VALVE OPERATION ANODE ROD REPLACEMENTCLEANING THE INLET WATER FILTER MOTORSCLEANING THE HEAT ENGINE FLUSHING THE HEAT EXCHANGER LIME BUILD- UPFAULT INDICATION AND ERROR CODES DRAINING THE TANKCode and DIAGNOSTIC DISPLAYDiagnostic DisplayedCause FaultLockout RemedyCode FaultLockout DescriptionCode TROUBLESHOOTING b.The unit display is an error code WHEN THE TAP IS OPENEDCheck if there is any error code on system installed, or there is aSERVICE LEAKAGE CHECKPOINTSITEM # PARTS IDENTIFICATIONA Baffle, Flue B Hot Water Outlet Nipple w/ Anode, Heat Trap AB C DEF G T SH R I Q P REPLACEMENT PARTS DESCRIPTION KIT #CLAIM PROCEDURE LIMITED RESIDENTIAL GAS WARRANTYSERVICE AND LABOR RESPONSIBILITY CONDITIONS AND EXCEPTIONSPage Page 500 TENNESSEE WALTZ PARKWAY ASHLAND CITY, TN PHONE 1-800-433-2545 FAX