GENERAL SAFETY
To meet commercial hot water requirements, the tank- stat is adjustable up to 190°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 gen- eral purpose hot water.
Safety and energy conservation are factors to be con- sidered when setting the water temperature on the tankstat. The most energy efficient operation will result when the temperature setting is the lowest that satis- fies the needs consistent with the application.
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.
Table A 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 | |
|
|
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 |
|
|
155°F | About 1 second |
|
|
Table courtesy of Shriners Burn Institute.
Table A: Time to Produce Serious Burn
Time/Temperature
Relationships in Scalds
The temperature of the water in the storage tank can be regulated by setting the temperature dial on front of the tankstat. To comply with safety regulations, the tankstat was set at its lowest setting before shipment from the factory.
Fig. 1 illustrates the tankstat. To adjust the water tem- perature, insert a small straight screwdriver into slotted screw in hole in front of tankstat and turn wheel to desired setting. Thermostat is adjustable up to 190°F.
Maximum water temperatures occur just after burner has shut off. To find hot water temperature being deliv- ered, turn on a hot water faucet and place a thermometer in the hot water stream and read the thermometer.
Fig. 1: Tankstat Adjustment
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