!General Safety Precautions
To meet commercial water use needs, the thermostat on this water heater is adjustable up to 180°F. However, water temperatures over 125°F. can cause severe burns instantly or death from scalds. This is the preferred starting point for setting the control for supplying general purpose hot water.
Safety and energy conservation are factors to be considered 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.
!D A N G E R
HOT
BURN
Water temperature over 125°F can cause severe burns instantly or death from scalds.
Children, disabled and elderly are at highest risk of being scalded.
See instruction manual before setting temperature at water heater.
Feel water before bathing or showering.
Temperature limiting valves are available, see manual.
Maximum water temperatures occur just after burner has shut off. To find hot water temperature being delivered, turn on a hot water faucet and place a thermometer in the hot water stream and read the thermometer.
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.
Temperature | Time to Produce Serious Burn |
120° F | More than 5 minutes |
125° F | 11/2 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 11/2 seconds |
155° F | About 1 second |
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Table courtesy of Shriners Burn Institute
Time / Temperature Relationships in Scalds
The temperature of the water in the heater can be regulated by setting the temperature dial on front of the thermostat. To comply with safety regulations the thermostat was set at its lowest setting before water heater was shipped from the factory. The illustration below illustrates the thermostat and how to adjust the water tem- perature.
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To adjust the water temperature, insert a small straight screwdriver into slotted screw in hole in front of ther- mostat and turn wheel to desired setting. Thermostat
is adjustable up to 180º F.
CAUTION!! - Hotter water increases the risk of SCALDING!
THERMOSTAT
HoneywellWhite-Rodgers
NOTICE: Each water heater will contain one (1) of the above ther- mostats. Refer to actual unit to determine which one.
!DANGER
Hotter water increases the Potential for HotWater SCALDS.
NOTICE: Mixing valves are available for reducing point of use water temperature by mixing and cold water in branch water lines Contact a licensed plumber or the local plumbing authority for further information.