320386-001 - AO Smith Water Heaters

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Checking the DraftWater Temperature RegulationDo not touch vent.WARNINGBurn HazardDoing so can result in burns.After successfully lighting the water heater, allow the unit tooperate for 15 minutes and check the draft hood reliefopening for proper draft (Figure 17). Make sure all otherappliances in the area are operating and all doors are closedwhen performing the draft test. Pass a match flame aroundthe relief opening of the draft hood. A steady flame drawninto the opening indicates proper draft.MATCHDRAFT HOODRELIEFOPENINGFIGURE 17.If the flame flutters or is blown out, combustion products areescaping from the relief opening. If this occurs, do not operatethe water heater until proper adjustments or repairs are madeto the vent pipe system and/or air supply requirements.Burner FlamesInspect the burner flames through the viewport andcompare them to the drawings in Figure 18. A properlyoperating burner should produce a soft blue flame. Bluetips with yellow inner cones are satisfactory. The tipsof the flame may have a slight yellow tint. The flameshould not be all yellow or have a sharp blue-orangecolor. Contaminated air may cause an orange coloredflame. Contact a qualified technician if the flame is notsatisfactory.Emergency Shut DownFIGURE 18.IMPORTANT: Should overheating occur or the gas supplyfails to shut off, turn off the water heater’s manual gascontrol valve and call a qualified technician.Water temperature over 125°F (52°C)can cause servere burns instantlyresulting in severe injury or death.Children, the elderly, and thephysically or mentally disabled are athighest risk for scald injury.Feel water before bathing orshowering.Temperature limiting valves areavailable.Read instruction manual for safetemperature setting.Due to the nature of the typical gas water heater, the watertemperature in certain situations may vary up to 30°F(16.7 °C) higher or lower at the point of use such as,bathtubs, showers, sink, etc.HOTTER WATER CAN SCALD: Water heaters areintended to produce hot water. Water heated to atemperature which will satisfy space heating, clotheswashing, dish washing, and other sanitizing needs canscald and permanently injure you upon contact. Somepeople are more likely to be permanently injured by hotwater than others. These include the elderly, children,the infirm, or physically/mentally handicapped. If anyoneusing hot water in your home fits into one of these groupsor if there is a local code or state law requiring a certaintemperature water at the hot water tap, then you musttake special precautions. In addition to using the lowestpossible temperature setting that satisfies your hot waterneeds, a means such as a mixing valve should be usedat the hot water taps used by these people or at the waterheater. Mixing valves are available at plumbing supply orhardware stores. See Figure 14. Follow manufacturer’sinstructions for installation of the valves. Before changingthe factory setting on the thermostat, see Figure 19A.Using the lowest hot water temperature that meets yourneeds will also provide the most energy efficient operationof the water heater.Never allow small children to use a hot water tap, orto draw their own bath water. Never leave a child orhandicapped person unattended in a bathtub or shower.NOTE: A water temperature range of 120°F-140°F(49°C-60°C) is recommended by most dishwashermanufacturers.The thermostat is adjusted to the pilot position when itis shipped from the factory. Water temperature can beregulated by moving the temperature dial to the preferredsetting. The preferred starting point is 120°F at the “HOT”setting. Align the knob with the desired water temperatureas shown in Figure 19A. There is a hot water scaldpotential if the thermostat is set too high.NOTE: Temperatures shown on the gas control valve/thermostat are approximates. The actual temperature ofthe heated water may vary.IMPORTANT: Adjusting the thermostat past the 120°Fmark on the temperature dial will increase the risk of scaldinjury. Hot water can produce first degree burns within:22
WaterTemperature °F110116116122131140149154Time for 1stDegree Burn(Less Severe Burns)(normal shower temp.)(pain threshold)35 minutes1 minute5 seconds2 seconds1 secondInstantaneousTime forPermanent Burns2nd & 3rd Degree(Most Severe Burns)45 minutes5 minutes25 seconds5 seconds2 seconds1 second(U.S. Government Memorandum, C.P.S.C., Peter L. Armstrong, Sept. 15,1978)GAS CONTROL VALVE/THERMOSTATSETTINGSGAS CONTROL/TEMPERATURE KNOBSTATUSLIGHT120°FMARKWater Temperature AdjustmentThe water temperature setting can be adjusted from 55°Fto 155°F. Turn the Gas Control/Temperature Knob to thedesired setting/temperature.NOTE:• Some models are certified for 180°F outlettemperatures. See the Data Plate on the front of thewater heater for the maximum outlet temperature.• The temperatures indicated are approximates. Theactual temperature of the heated water may vary.Operating Modes and Settings• Standard Mode - The controller adjusts the waterheater to maintain the temperature set by the user.• Vacation Setting - The Vacation setting (VAC) setsthe controller at approximately 55°F. This setting isrecommended when the water heater is not in use for along period of time. This effectively turns the controllertemperature setting down to a temperature thatprevents the water in the water heater from freezingwhile still conserving energy.VACIGNITERFIGURE 19A.Should overheating occur or the gas supply fail to shut off,turn off the manual gas control valve to the appliance.NOTE: During low demand periods when hot water is notbeing used, a lower thermostat setting will reduce energylosses and may satisfy your normal hot water needs. If hotwater use is expected to be more than normal, a higherthermostat setting may be required to meet the increaseddemand. When leaving your home for extended periods(vacations, etc.) turn the temperature dial to its lowestsetting. This will maintain the water at low temperatureswith minimum energy losses and prevent the tank fromfreezing during cold weather.Operating the Temperature Control SystemList of status codes are shownat top of gas control valve/thermostat.VACFIGURE 19B.23Status Light CodeNormal Flashes:• 0 Flashes Indicates Control Off/Pilot Out.• 1 Flash Indicates Normal Operation.• A solid red light indicates that the gas controlvalve/thermostat is shutting down.Diagnostic Flashes:If the water heater is not working, look for the followingdiagnostic flashes after lighting the pilot. For more details, see“Status Light and Diagnostic Code Troubleshooting Chart.”2 Flashes Indicates Thermopile Voltage Low4 Flashes Indicates Overheat Failure5 Flashes Indicates Sensor Failure7 Flashes Indicates Electronic Control Failure8 Flashes See “Status Light and Diagnostic CodeTroubleshooting Chart.”Operational ConditionsCondensationWhenever the water heater is filled with cold water, somecondensate will form while the burner is on. A waterheater may appear to be leaking when in fact the water iscondensation. This usually happens when:a. A new water heater is filled with cold water for the first time.b. Burning gas produces water vapor in water heaters, particularlyhigh efficiency models where flue temperaturesare lower.c. Large amounts of hot water are used in a short time andthe refill water in the tank is very cold.Moisture from the products of combustion condense on thecooler tank surfaces and form drops of water which may fallonto the burner or other hot surfaces to produce a “sizzling”or “frying” noise.
Page 1 and 2: Installation Instructions and Use &
Page 3 and 4: SAFE INSTALLATION, USE AND SERVICEY
Page 5 and 6: TYPICAL INSTALLATIONGET TO KNOW YOU
Page 7: Location RequirementsWARNINGCarbon
Page 10 and 11: LP Gas OnlyWARNINGExplosion HazardH
Page 12 and 13: PERMANENTOPENINGS TOTHE OUTSIDE ORA
Page 14: Align the legs of the draft hood wi
Page 18 and 19: • This water heater is not to be
Page 20 and 21: OPERATING YOUR WATER HEATERLighting
Page 24 and 25: Excessive condensation can cause pi
Page 26 and 27: VACproperly. To prevent water damag
Page 28 and 29: External Inspection & Cleaning of t
Page 30 and 31: FVIR System Operational Checklist1.
Page 32 and 33: PILOT LIGHT TROUBLESHOOTING FLOWCHA
Page 34 and 35: STATUS LIGHT AND DIAGNOSTIC CODE TR
Page 36 and 37: REPAIR PARTS ILLUSTRATIONWhen order
Page 38 and 39: LIMITED RESIDENTIAL GAS WARRANTYTHI
Page 40: Copyright © 2010 A.O. Smith Corpor

320386-001 - AO Smith Water Heaters

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