Raypak 2600401 Installation & Operating Instructions Manual

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5GENERAL SAFETYTo meet commercial hot water requirements, the tank-stat is adjustable up to 190°F. However, watertemperatures over 125°F can cause severe burnsinstantly or death from scalds. This is the preferredstarting point for setting the control for supplying gen-eral purpose hot water.Safety and energy conservation are factors to be con-sidered when setting the water temperature on thetankstat. The most energy efficient operation will resultwhen the temperature setting is the lowest that satis-fies the needs consistent with the application.Maximum water temperatures occur just after burnerhas shut off. To find hot water temperature being deliv-ered, turn on a hot water faucet and place athermometer in the hot water stream and read thethermometer.Water temperature over 125°F cancause instant severe burns or deathfrom scalds.Children, disabled, and elderly areat highest risk of being scalded.See instruction manual before set-ting temperature at water heater.Feel water before bathing or show-ering.Temperature limiting valves areavailable, see manual.Table A details the relationship of water temperatureand time with regard to scald injury and may be usedas a guide in determining the safest water temperaturefor your applications.Time/TemperatureRelationships in ScaldsThe temperature of the water in the storage tank canbe regulated by setting the temperature dial on front ofthe tankstat. To comply with safety regulations, thetankstat was set at its lowest setting before shipmentfrom the factory.Fig. 1 illustrates the tankstat. To adjust the water tem-perature, insert a small straight screwdriver into slottedscrew in hole in front of tankstat and turn wheel todesired setting. Thermostat is adjustable up to 190°F.Temperature Time to Produce Serious Burn120°F More than 5 minutes125°F 1-1/2 to 2 minutes130°F About 30 seconds135°F About 10 seconds140°F Less than 5 seconds145°F Less than 3 seconds150°F About 1-1/2 seconds155°F About 1 secondTable courtesy of Shriners Burn Institute.Table A: Time to Produce Serious BurnFig. 1: Tankstat Adjustment