To Next PageTo Next PageWhy is A.O. Smith Residential Gas Water Heaters Water Heater water too hot?
If the water from your A.O. Smith Water Heater is too hot, the thermostat might be set too high. Refer to the TEMPERATURE REGULATION section for instructions.
What to do if A.O. Smith Water Heater is leaking from the T & P valve?
If your water heater's Temperature and Pressure Relief valve is leaking, it could be due to thermal expansion in a closed water system. To resolve this, install a thermal expansion tank, ensuring you do not plug the T&P valve. Another cause could be an improperly sealed valve. Check the relief valve for proper operation, again making sure not to plug the T&P valve.
Why A.O. Smith Residential Gas Water Heaters Water Heater burner will not stay lit and goes out after 4-5 seconds?
If the burner won't stay lit, it could be due to reversed outlet polarity; test polarity and correct it. High ambient room temperature could also be a factor, contact a qualified service agency to determine cause. A defective gas valve could also be the problem, so replace the gas valve.
What to do if A.O. Smith Water Heater hot water is too hot?
If the water is too hot, the thermostat may be set too high. Refer to the TEMPERATURE REGULATION section.
How to get rid of combustion odors from A.O. Smith Residential Gas Water Heaters?
If you're experiencing combustion odors from your A.O. Smith Water Heater, it could be due to blocked air inlets. Try unblocking the inlet air openings. Insufficient air supply could also be the cause, so ensure fresh air ventilation to the water heater. A clogged flue might be the issue; clean it, locate the source, and correct it. If the heater is installed in a confined area or if the house is too tight, provide fresh air ventilation to the water heater.
What to do if A.O. Smith Residential Gas Water Heaters relief valve is dripping?
If your A.O. Smith Water Heater's relief valve is dripping, it could be due to pressure build-up. Consider using a pressure-reducing valve and relief valve. Heater stacking could also cause this issue, so try lowering the thermostat setting. If you have a closed water system, refer to the thermal expansion section for guidance. An improperly seated valve may also be the cause, so check the relief valve for proper operation, but do not plug the T&P valve.
General| Brand | A.O. Smith |
|---|---|
| Model | Residential Gas Water Heaters |
| Category | Water Heater |
| Language | English |
Explains general safety warnings and the meaning of safety alert symbols.
Procedure for what to do if you smell gas.
Explains the meaning of DANGER, WARNING, and CAUTION safety alert symbols.
Defines terms like Qualified Installer, Service Agency, and Gas Supplier.
Covers hazards related to fire, burns from hot water, and tank explosions.
Safety precautions for installation, servicing, and handling potential damage.
Hazards related to carbon monoxide gas and flammable vapors.
Lists abbreviations used in the manual and defines installer qualifications.
Initial steps and considerations before beginning the water heater installation.
Requirements for installing carbon monoxide detectors in Massachusetts.
Specific signage and venting requirements for gas-fueled appliances in MA.
Diagram showing typical mixing valve installation for combo heating systems.
Specific piping requirements related to Massachusetts codes.
Identifies key components of the gas-fired water heater using numbered figures.
Illustrations and details of burner assemblies for different models.
Information on ordering replacement parts and combo heating system taps.
Explains scald hazards and the importance of mixing valves for safety.
Guidelines on managing water supply pressure and using pressure-reducing valves.
Diagrams showing suggested piping arrangements for mixing valves.
Information on burn times related to water temperature and scald risks.
Details the sequence of operation for the water heater's ignition system.
Safety warnings and requirements for electrical connections.
Provides schematics for electrical connections and wiring.
Explains operation of high limit controls and blower pressure switch lockouts.
Details the flammable vapor sensor's function and lockout states.
Factors to consider when selecting a location for the water heater.
Guidelines to prevent property damage from water heater leaks.
Warnings about storing flammable liquids near the water heater.
Minimum clearances required for servicing the water heater.
Minimum clearances from water heater to combustible materials.
Specific instructions for installing water heaters on carpeted floors.
Diagram and requirements for ventilation air openings.
Warnings about chemical vapors affecting air quality and equipment.
Defines unconfined and confined spaces for ventilation calculations.
Information on air intake for direct vent appliances.
How exhaust fans affect air supply and require replacement air.
Instructions for calculating the size of openings for confined spaces.
Diagrams illustrating airflow options from indoors and outdoors.
Guidelines for calculating free area through louvers and grilles.
Explains how chemical vapors can corrode the vent system.
Details the severe risks of scalds from hot water and prevention methods.
Suitability of the appliance for potable water and space heating.
Specific piping requirements when used for combo heating applications.
Lists requirements for piping, fittings, and components in combo systems.
Describes options for heating modes: fan coil or baseboard hydronic loop.
Diagrams illustrating piping for fan coil and baseboard heating systems.
Explains what constitutes a closed water system and its implications.
Discusses hazards of thermal expansion and the need for expansion tanks.
Recommendation for using dielectric unions to prevent corrosion.
Details explosion hazards associated with the T&P relief valve.
Requirements for T&P valve certification and discharge piping.
Warning regarding carbon monoxide risk at high altitudes.
Warnings about fire and explosion hazards related to gas piping.
Ensuring correct gas type and pressure for the water heater.
Compliance with codes and approved materials for gas piping.
Explains the importance and installation of sediment traps in gas lines.
Instructions on how to properly fill the water heater tank.
Carbon monoxide hazard warning and prohibition of common venting.
Table detailing minimum clearances for sidewall vent terminations.
Steps for securely mounting the blower assembly and making connections.
Overview of vent system installation and planning the layout.
Lists approved materials for vent piping, including PVC, CPVC, ABS, and Polypropylene.
Details regarding polypropylene vent systems, connections, and adapters.
Explains causes of condensate and methods for draining it.
General guidelines and codes for exhaust venting system installation.
Important notes on venting materials, common venting, and pipe movement.
Guidance on selecting the correct vent screen based on venting configuration.
Instructions for installing vent screens into termination elbows.
Table showing equivalent lengths of pipe for various elbows.
Diagram illustrating how to calculate equivalent vent length.
Steps for planning venting layout, measuring, and cutting pipe.
Instructions for dry fitting, solvent cementing, and securing vent pipe joints.
Methods for securing vent piping and sealing the termination.
Illustrations of coupling installations for different vent pipe sizes and models.
Procedure for rotating the blower assembly for horizontal venting.
Tools and materials needed for preparing PVC/CPVC vent pipe.
Guidance on selecting and applying cement, and recommended brush sizes.
Steps for deburring pipe ends and performing a test dry fit.
Inspect, clean, and prime pipe and fittings before cementing.
Applying solvent cement and assembling the joint.
Cleaning excess cement and allowing the joint to cure properly.
Checklist for water heater location requirements.
Checklist for gas supply and vent pipe system requirements.
Checklist for water system piping and electrical connections.
Essential safety warnings and checks to perform before lighting the heater.
Detailed instructions for operating the water heater's ignition sequence.
Recommendations for setting lower temperatures to prevent scalds.
Explains risks of scalds from hot water, especially for vulnerable groups.
Guidance on adjusting the thermostat for desired water temperature.
Table correlating thermostat settings with burn times and scald risks.
Explanation of the vacation setting for conserving energy when not in use.
Explains condensate formation during start-up and how to differentiate from leaks.
Describes normal initial smoke, odor, and sounds during start-up.
Discusses causes of smelly water, like anode rod reactions, and potential solutions.
Warns about potential hydrogen gas buildup and explosion risk.
Details the function of the manual reset high limit (TCO) system.
Routine checks for the water heater, vent piping, and plumbing.
Instructions for cleaning lint and dust from the blower assembly.
Step-by-step guide for removing and cleaning the blower assembly.
Visual inspection of the main burner and igniter for proper flame characteristics.
Guidance on cleaning the burner and combustion chamber.
How to inspect the anode rod and identify signs of depletion.
Step-by-step instructions for installing a new anode rod.
Instructions for performing an annual test of the T&P relief valve.
Step-by-step instructions to drain the water heater storage tank.
Instructions for flushing the water heater tank to remove sediment.
Guide to checking common sources of water leakage in the water heater.
Advice on when to contact a service agency for assistance.
Details on model, serial number, and gas type needed for ordering parts.
Diagrams identifying components from front and rear views of the water heater.
Detailed diagrams of burner assemblies and igniter components.
Troubleshooting guides for burner flame issues and insufficient hot water.
Troubleshooting for relief valve drips and overall water leakage.
Troubleshooting for condensation, combustion odors, and ignition failures.
Troubleshooting for noise, water leakage, and blower operation problems.
Troubleshooting continuous blower operation, igniter issues, and hot vent pipes.
Guidance on resetting heater controls and understanding lockout states.
Details the timing for various ignition states and periods.
Lists system status codes and corresponding LED flash sequences for diagnostics.
Details the warranty coverage, terms, and conditions for the original owner.
Lists conditions and exceptions that may void the water heater warranty.
Clarifies responsibilities for service, labor, and associated costs.
Steps to initiate a warranty claim and contact information for support.
Disclaims express warranties and limits implied warranties like merchantability.
