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 | |
|
|
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 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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