A.O. Smith HYB-90N manual

500 TENNESSEE WALTZ PARKWAY

500 TENNESSEE WALTZ PARKWAY

ASHLAND CITY, TN 37015

PHONE: 1-800-433-2545 FAX: 1-800-433-2515

www.aosmithwaterheaters.com / email: parts@hotwater.com

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A.O. Smith HYB-90N warranty TENNESSEE WALTZ PARKWAY ASHLAND CITY, TN PHONE 1-800-433-2545 FAX

Contents

For Your Safety POWER VENT GAS MODELSInstallation and Operating Manual HYBRID GAS WATER HEATERS TABLE OF CONTENTS IMPORTANT INFORMATION SAFE INSTALLATION, USE AND SERVICE IMPORTANT DEFINITIONS GENERAL SAFETY DANGER INTRODUCTION Page REPLACEMENT PARTS AND DELIMING PRODUCTS GET TO KNOW YOUR WATER HEATER - GAS MODELS INSTALLATION CONSIDERATIONS ROUGH IN DIMENSIONS INSTALLATION REQUIREMENTS FOR THE COMMONWEALTH OF MASSACHUSETTS WATER PIPING - MIXING VALVE USAGE Water Potable Heating All models are considered FACTS TO CONSIDER ABOUT LOCATION HANDLE INSTALLATION EARTHQUAKE ZONES Access To Screws Top Casing Front COMBUSTION AIR AND VENTILATION APPLIANCES IN UNCONFINED SPACESAPPLIANCES IN CONFINED SPACES B. ALL AIR FROM OUTDOORS See Figures 12, 13 and CHEMICAL VAPOR CORROSION WATER PIPINGCLOSED WATER SYSTEMS THERMAL EXPANSION HARD WATER TEMPERATURE-PRESSURE RELIEF VALVE T&P Valve and Pipe Insulation if supplied GAS PIPING SEDIMENT TRAPS HIGH ALTITUDE INSTALLATIONS GAS LINE PURGINGFLOODING/FREEZING FILLING THE WATER HEATER If using 2 inch vent pipe VENT PIPE TERMINATIONPLANNING THE VENT SYSTEM If using 3 inch vent pipe RODENT SCREEN INSTALL INTO ELBOW GROUND LEVEL OR MAXIMUM SNOW LINETERMINATION ELBOW ELBOW STRAP INSTALLATION OF VENT SYSTEM VENT TERMINAL INSTALLATION, SIDEWALLCONDENSATE CONDENSATION WARNING SEQUENCE OF INSTALLATIONS INSTALLATION SEQUENCEVent terminals supplied with heater must be used INSTALLATION OF VENT SYSTEM, SIDEWALL INSTALLATION OF VERTICAL VENT SYSTEM VENT PIPE PREPARATION RECOMMENDED BRUSH* SIZE FOR PRIMER AND CEMENT APPLICATIONS STEP ASTEP B U.S. POWER VENT STEP ESTEP F STEP G CONNECTION TO VENT PIPE VENT HOODS MAY BE EXTREMELY HOT DURING OPERATION ELECTRICAL CONNECTIONS CALIBRATIONFIGURE 33a “OFF”, “up” OPERATING INSTRUCTIONS DISPLAY PANEL Numeric Display CAUTION LABEL ALL WIRES PRIOR TO DISCONNECTION WHEN SERVICINGCONTROLS. WIRING ERRORS CAN CAUSE IMPROPER AND DANGEROUS LIGHTING INSTRUCTIONS FOR YOUR SAFETY READ BEFORE LIGHTINGOPERATING INSTRUCTIONS TO TURN OFF GAS TO APPLIANCE HEAT CYCLE DEFINITIONS STATEDESCRIPTION TEMPERATURE REGULATION UNIQUE HYBRID FEATURES Temperature Probes Water Circulation Pump Line Voltage Monitor CONSTANT OUTPUT TEMPERATURE CONTROL Detection of Failure to Maintain Desired Constant TemperatureSTART UP CONDITIONS OPERATIONAL CONDITIONS MAINTENANCE HOUSEKEEPINGVENTING SYSTEM INSPECTION BURNER OPERATION AND INSPECTION ANODE ROD REPLACEMENT CLEANING THE INLET WATER FILTERTEMPERATURE-PRESSURE RELIEF VALVE OPERATION MOTORS CLEANING THE HEAT ENGINE FLUSHING THE HEAT EXCHANGER LIME BUILD- UP FAULT INDICATION AND ERROR CODES DRAINING THE TANK DIAGNOSTIC DISPLAY DiagnosticCode and Displayed Fault LockoutCause Remedy Fault LockoutCode Description Fault TROUBLESHOOTING WHEN THE TAP IS OPENED Check if there is any error code onb.The unit display is an error code system installed, or there is a SERVICE LEAKAGE CHECKPOINTS PARTS IDENTIFICATION ITEM #A 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 # LIMITED RESIDENTIAL GAS WARRANTY SERVICE AND LABOR RESPONSIBILITYCLAIM PROCEDURE CONDITIONS AND EXCEPTIONSPage Page 500 TENNESSEE WALTZ PARKWAY ASHLAND CITY, TN PHONE 1-800-433-2545 FAX