Manuals / A.O. Smith / Household Appliance / Water Heater

A.O. Smith Residential Power Vent Gas Water Heaters with Hot Surface Ignition Table of Contents

Models: Residential Power Vent Gas Water Heaters with Hot Surface Ignition

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Table of Contents
General Safety	2,3
Table of Contents	4
Introduction	5
Preparing for the New Installation	5
Typical Installation	6
Locating the New Water Heater	7-10
Facts to Consider About Location	7
Combustion Air and Ventilation	8,9
Venting Clearances	8,9
Combustion Air and Ventilation for Appliances Located in Unconfined Spaces	9
Combustion Air and Ventilation for Appliances Located in Confined Spaces	10
Installing the New Water Heater	11-24
Water Piping	11
Temperature-Pressure Relief Valve	12
Filling the Water Heater	13
Wiring	13,14
Field Installed Wiring	13,14
Wiring Diagram	14
Venting	15-22
Gas Piping	22,23
Installation Checklist	24
Operating	25-27
Temperature Regulation	28
For Your Information	29,30
Start Up Conditions	29
Condensation	29
Smoke/Odor	29
Thermal Expansion	29
Strange Sounds	29
Operational Conditions	29,30
Smelly Water	29,30
“Air” In Hot Water Faucet’s	30
High Temperature Limit Switch	30
Venting Manual Reset Switch	30
Not Enough or No Hot Water	30
Water Is Too Hot	30
Periodic Maintenance	31-33
Venting System Inspection	31
Burner Inspection	31
Burner Cleaning	31
L.P. Gas Control Valve & Burner Assembly Replacement Information	32
Housekeeping	32
Anode Rod Inspection	32
Temperature-Pressure Relief Valve Operation	32
Draining	33
Drain Valve Washer Replacement	33
Service	33
Leakage Checkpoints	34
Troubleshooting	35-37
Repair Parts	38,39

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A.O. Smith Residential Power Vent Gas Water Heaters with Hot Surface Ignition instruction manual Table of Contents

Contents

NOT FOR USE IN MANUFACTURED MOBILE HOMES The Discharge Pipe General SafetyMust not be plugged or blocked a. DO NOT cover the temperature-pressure relief valve General Safety cont’dILY INJURY, OR PROPERTY DAMAGE Table of Contents Preparing for the New Installation IntroductionMANUAL BEFORE ATTEMPTING TO INSTALL OR OPERATE THE WATER HEATER Abbreviations Found In This Instruction ManualTypical Installation Some models are equipped with circulating loop fittingsLocating the New Water Heater Facts to Consider About the LocationFacts to Consider About the Location cont’d Locating the New Water Heater cont’dCombustion Air and Ventilation Locating the New Water Heater cont’d Venting Through Roof - ClearancesFigure 3a Figure 3bLocating the New Water Heater cont’d b. ALL AIR FROM OUTDOORS see FiguresInstalling the New Water Heater Water PipingInstalling the New Water Heater cont’d Temperature-Pressure Relief Valvethe temperature-pressure relief valve, and the discharge pipe RELIEF VALVE OPENINGWiring Filling the Water HeaterInstalling the New Water Heater cont’d OPTIONAL Field Installed WiringWiring cont’d Installing the New Water Heater cont’dOPTIONAL Field Installed Wiring cont’d WIRING DIAGRAMVenting Installing the New Water Heater cont’dVENTING THROUGH AN OUTSIDE WALL See rating plate for BTU/HR ratingVenting cont’d Installing the New Water Heater cont’dVENTING THROUGH AN OUTSIDE WALL cont’d 4″ PVC, ABS or CPVC Schedule 40 vent pipingInstalling the New Water Heater cont’d The vent piping may be installed as followsVENTING SYSTEM EXAMPLE INSTALLATIONS FOR ALL MODELS NOTE See pages 21 and 22 for vertical venting through a roofInstalling the New Water Heater cont’d Venting cont’dVENTING THROUGH AN OUTSIDE WALL cont’d 40 AND 50 GALLON 40,000 BTU/HR MODELS 3″ VENTInstalling the New Water Heater cont’d Cementing PVC, ABS or CPVC Pipe and Fittings3″ DIA. VENT NUMBER OFInstalling the New Water Heater cont’d CUTTING OPENING THROUGH AN OUTSIDE WALL AND COLLAR INSTALLATIONINSTALLATION SHOWING USE OF PVC, ABS OR CPVC PIPE CONNECTING VENT TO BLOWERInstalling the New Water Heater cont’d VENTING THROUGH A ROOF ALL MODELS3″ PVC, ABS or CPVC Schedule 40 vent piping 4″ PVC, ABS or CPVC Schedule 40 vent pipingGas Piping Installing the New Water Heater cont’dVENTING THROUGH A ROOF cont’d 3″ DIA. VENTInstalling the New Water Heater cont’d GAS PIPING WITH FLEXIBLE CONNECTORGAS PIPING WITH ALL BLACK IRON PIPE TO GAS CONTROL SEDIMENT TRAPInstallation Checklist Installing the New Water Heater cont’dBEFORE OPERATING THE HEATER MODEL RATING PLATEOperating BEFORE THE WATER HEATER WILL OPERATE75 GALLON 70,000 AND 75,000 BTU/HR OPERATIONOperating cont’d THIS WATER HEATER. FOR YOUR SAFETY IF YOU SMELL GASMake sure gas and electric power are connected properly AN ODORANT IS ADDED TO THE GAS USED BYFOR YOUR SAFETY READ BEFORE OPERATING WARNING TURN OFF ALL ELECTRIC POWER BEFORE SERVICINGOperating cont’d OPERATING INSTRUCTIONSTemperature Regulation Start Up Conditions For Your InformationOperational Conditions For Your Information cont’d VENTING MANUAL RESET SWITCHSMELLY WATER cont’d “AIR” IN HOT WATER FAUCET’SPeriodic Maintenance Burner CleaningVenting System Inspection Burner InspectionPeriodic Maintenance cont’d Temperature-Pressure Relief Valve OperationHousekeeping Anode Rod InspectionDrain Valve Washer Replacement ServiceDraining Periodic Maintenance cont’dLeakage Checkpoints faucet before turning “ON” gas to the water heaterTroubleshooting THERMOSTAT AND GAS SUPPLY CHECKTroubleshooting cont’d SYSTEMS CHECKTroubleshooting cont’d PROBLEMSOLUTION Thermostat problemsBlower/Draft Hood Assembly for 40,000 Btu/Hr Models Only Repair PartsPVC, ABS or CPVC items for all models supplied locally Repair Parts cont’d THIS IS A REPAIR PARTS LIST, NOT A PACKING LISTPART DESCRIPTION