Raypak 751 manual General Safety, Time/Temperature Relationships in Scalds

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GENERAL SAFETY

To meet commercial water use needs, an external operating control for this hot water boiler is adjustable up to 210°F. However, water temperatures over 125°F can cause instant severe burns or death from scalds. The preferred starting point for setting the control for supplying general purpose hot water is 125°F.

Safety and energy conservation are factors to be con- sidered when setting the water temperature on the thermostat. The most energy efficient operation will result when the temperature setting is the lowest that satisfies the needs consistent with the application.

Time/Temperature

Relationships in Scalds

The following chart details the relationship of water temperature and time with regard to scald injury and may be used as a guide in determining the safest water temperature for your applications.

Water

Time to Produce Serious

Temp.

Burn

 

 

120°F

More than 5 minutes

 

 

125°F

1-1/2 to 2 minutes

 

 

130°F

About 30 seconds

 

 

135°F

About 10 seconds

 

 

140°F

Less than 5 seconds

 

 

145°F

Less than 3 seconds

 

 

150°F

About 1-1/2 seconds

 

 

155°F

About 1 second

 

 

Table courtesy of The Shriners Burn Institute

Table A: Time to Produce Serious Burn

Water temperature over 125°F can cause instant severe burns or death from scalds.

Children, disabled, and elderly are at 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 are available, see manual.

Maximum water temperatures occur just after the boil- er’s burner has shut off. To determine the water temperature being delivered, turn on a hot water faucet and place a thermometer in the hot water stream.

NOTE: When this water heater is supplying general purpose hot water for use by individuals, a thermostatically controlled mixing valve for reducing point of use water temperature is recommended to reduce the risk of scald injury. Contact a licensed plumber or the local plumbing authority for further information.

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Contents Advanced Design Boiler Page Contents Pay Attention to These Terms Model Identification Before InstallationInstallations at Elevation Product ReceiptComponent Locations Component LocationsTime/Temperature Relationships in Scalds General SafetyEquipment Base InstallationInstallation Codes Indoor InstallationsDirect Vent Outdoor InstallationsCombustion and Ventilation Air Indoor UnitsInstallations1 Canadian Installations2 Canadian Installations InstallationsConventional Combustion Air Supply General Low Temperature SystemTemperature & Pressure Gauge Water PipingHydronic Heating Single Boiler Primary/Secondary Piping Dual Boiler Piping Domestic HOT Water Piping Single Boiler Domestic Hot Water with One Storage Tank Page Pool and Spa Water Chemistry Pool HeatingAutomatic Chlorinators and Chemical Feeders Winterizing Your HeaterSingle Boiler Pool Application Double Boiler Pool Application GAS Supply ConnectionsGas Supply Pressure Gas Supply ConnectionElectrical Power Connections Electrical Connections Domestic Hot Water Field Wiring ConnectionsGeneral Definition of Appliance Categories Venting ConnectionsVent Terminal Location Venting Configurations Venting Installation TipsADB-1501 Natural Draft Vertical Vent Termination Natural Draft Vertical Venting System InstallationADB-1501 Horizontal Thru-Wall Direct Venting/Combustion Air Category Horizontal Thru-wall Direct Vent TerminationÁDB-1501 Vertical Direct Venting/Combustion Air Category Vertical Direct Vent Termination Vertical Direct Venting System InstallationContact the manufacturer for details Horizontal Thru-wall Venting System Category IV Installation PVC, ABS Page Galvanized ADB-751 Venting Material e.g Subtract 10 ft per Condensate Trap Alignment Condensate DrainControls Central Point Wiring CPWCPW Board Blower Fan Post-purge Pump Turn-off DelayFreeze Protection Feature Blower Fan Pre-purgeLight Color Indication Diagnostics BoardFigure L-2 Wiring DiagramIgnition Control Module Flow SwitchHigh Limit Manual Reset High Limit Auto ResetFill the System High and Low Gas Pressure Switches Manual ResetPRE-START-UP Low Water Cut Off OptionalBlower T Fitting Detail Pre-Start-up CheckTools Needed ADB Initial START-UPPreparation for Start-up Page Follow-up Main Burner AdjustmentSafety Inspection Post START-UP CheckOperating Instructions MaintenanceSuggested Minimum Maintenance Schedule OperationMonthly Connecting the Condensing Heat Exchanger CHXCleaning Boiler Heating Surfaces DailyConnecting Add-on Condensing Heat Exchanger to ADB Vent Switch AdjustmentInside Combustion Air Contamination AppendixEmissions Settings and Test Information Bluff Head Body Burner Warranty

751 specifications

The Raypak 751 is a high-efficiency, gas-powered pool and spa heater renowned for its advanced technology and durability. Designed with innovative features, the Raypak 751 prioritizes user convenience and energy efficiency, making it an excellent choice for pool owners seeking reliable heating solutions.

One of the standout features of the Raypak 751 is its robust heat exchanger, built from the finest materials to ensure long-lasting performance. This model utilizes a copper heat exchanger which is highly conductive, allowing for rapid heating of water and maintenance of consistent temperatures. Its design also minimizes scale buildup, extending the longevity of the heater.

The Raypak 751 is equipped with advanced digital controls that make it user-friendly. The intuitive interface allows for precise temperature settings and monitoring, ensuring optimal performance. Additionally, the heater features a temperature display that provides real-time updates, giving users peace of mind when adjusting their pool's environment.

Energy efficiency is a hallmark of the Raypak 751, thanks to its low NOx burner technology. This feature meets stringent environmental regulations while also lowering operational costs. By optimizing fuel usage, the heater not only contributes to reducing greenhouse gas emissions but also provides a more economical heating option for pool and spa owners.

The rugged construction of the Raypak 751 is another characteristic that sets it apart. Its heavy-duty cabinet is designed to withstand the elements, ensuring reliable operation in various weather conditions. The heater is available in multiple configurations, including both natural gas and propane options, allowing for flexible installation depending on the user's needs.

Furthermore, the Raypak 751 incorporates safety features, such as an integrated pressure switch that prevents operation when water flow is insufficient. This protects both the heater and associated plumbing from damage due to overheating or dry firing.

In summary, the Raypak 751 combines cutting-edge technology with user-centric features to deliver a superior pool heating experience. Its high-efficiency performance, durable construction, and advanced safety features make it a top choice for anyone looking to enhance their pool or spa. Whether for residential or commercial applications, the Raypak 751 ensures warmth and comfort, enriching the overall swimming experience.
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