22Burner 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.FIGURE 18.Emergency Shut DownIMPORTANT: 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 RegulationWater 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 19. Usingthe lowest hot water temperature that meets your needswill also provide the most energy efficient operation of thewater 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 of this water heater has been factory setat its lowest position. It is adjustable and must be reset tothe desired temperature setting to reduce the risk of scaldinjury. The index bar (Robsertshaw) and mark (WhiteRodgers) are indicative of approximately 120°F (49°C)and are the preferred starting points, see Figure 19. Somestates have a requirement for a lower setting.White Rodgers Valves:Turn the water temperature dial clockwise ( ) todecrease the temperature, or counterclockwise ( ) toincrease the temperature.Robertshaw Valves:Turn the water temperature dial clockwise ( ) toincrease the temperature, or counterclockwise ( ) todecrease the temperature.Should overheating occur or the gas supply fail to shut off,turn off the manual gas control valve to the appliance.CAU TIONWATERINCREASESHOTTERTHERISKOF SCALDINJURYVACATIONWARMHOTRESETBUTTONGAS CONTROL KNOBDIALSTOPINDEXBARSTEMPERATURE DIALROBERTSHAW GAS VALVE120°F130°F140°F150°F160°FINDEX BARTEMPERATURE DIAL160°FWHITE RODGERS GAS VALVEGAS CONTROL KNOB(OFF-PILOT-ON)150°F140°F130°F 120°FTemperatureSettingsTime to Produce 2nd & 3rdDegree Burns on Adult Skin160°F (71°C) About 1/2 second150°F (66°C) About 1-1/2 seconds140°F (60°C) Less than 5 seconds130°F (54°C) About 30 seconds120°F (49°C) More than 5 minutes80°F (27°C) - - - - - - - - - - - - - - - -FIGURE 19.