E93.1801EN171 HWB installation manual
10
To meet commercial hot water requirements, the water heater setpoint 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 general purpose hot water.
Safety and energy conservation are factors to be considered when setting the water temperature on the water
heater. The most energy efficient operation will result when the temperature setting is the lowest that satisfies the
needs consistent with the application. The table below 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.
Table courtesy of Shriners Burn Institute.
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.
Time/Temperature Relationships in Scalds
The temperature of the water in the storage tank can be
regulated by setting the temperature at the water heater. To
comply with safety regulations, the setpoint was set at its
lowest setting before shipment from the factory.
WARNING: Water temperatures over 125 °F (52 °C) can cause severe burns instantly or
death from scalding. The water temperature is factory set at 140 °F (60 °C) to minimize
legionella risk. Before bathing or showering always check the water temperature.
There is a Hot Water SCALD Potential if the water heater setpoint is set too high.
Hotter w a t e r increases the risk of SCALDING!
When this heater is supplying general purpose hot water requirements 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.
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 setting
temperature at water heater.
Feel water before bathing or showering.
Use temperature limiting valves.
Temperature
Time to Produce Serious 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
WARNING
DANGER
CAUTION
NOTICE
Содержание HWB-299
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