Raypak 751 Installation And Operating Instructions Manual

Also see for 1001: OPERATING AND INSTALLATION Manual

Raypak 751 Installation And Operating Instructions Manual Manual pdf 7 page image

7GENERAL SAFETYTo meet commercial water use needs, an externaloperating control for this hot water boiler is adjustableup to 210°F. However, water temperatures over 125°Fcan cause instant severe burns or death from scalds.The preferred starting point for setting the control forsupplying general purpose hot water is 125°F.Safety and energy conservation are factors to be con-sidered when setting the water temperature on thethermostat. The most energy efficient operation willresult when the temperature setting is the lowest thatsatisfies the needs consistent with the application.Maximum water temperatures occur just after the boil-er’s burner has shut off. To determine the watertemperature being delivered, turn on a hot waterfaucet and place a thermometer in the hot waterstream.NOTE: When this water heater is supplying generalpurpose hot water for use by individuals, athermostatically controlled mixing valve for reducingpoint of use water temperature is recommended toreduce the risk of scald injury. Contact a licensedplumber or the local plumbing authority for furtherinformation.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.Time/TemperatureRelationships in ScaldsThe following chart details the relationship of watertemperature and time with regard to scald injury andmay be used as a guide in determining the safestwater temperature for your applications.WaterTemp.Time to Produce SeriousBurn120°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 The Shriners Burn InstituteTable A: Time to Produce Serious Burn