3
To meet commercial water use needs, the temperature on this
water heater is adjustable up to 185°F (85° C). However, water tem-
peratures over 125°F (52° C) 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. The most energy efficient operation
will result when the temperature setting is the lowest that satisfies
the needs consistent with the application.
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.
General Safety Precautions
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.
The temperature of the water in the heater can be regulated by
setting the temperature on the display (see pages 18 & 19). To
comply with safety regulations the temperature was set at 120°F
before water heater was shipped from the factory. The illustra-
tion information on pages 25 & 26 shows the Display and how to
adjust the water temperature.
Hotter water increases the Potential for Hot Water SCALDS.
NOTICE: Mixing valves are available for reducing point of use
water temperature by mixing hot and cold water in branch water
lines. Contact a licensed plumber or the local plumbing authority
for further information.
D A N G E R
!
HOT
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.
BURN
Temperature Time to Produce Serious Burn
120° F (49°C) More than 5 minutes
125° F (52°C) 1
1
/
2
to 2 minutes
130° F (54°C) About 30 seconds
135° F (57°C) About 10 seconds
140° F (60°C) Less than 5 seconds
145° F (63°C) Less than 3 seconds
150° F (66°C) About 1
1
/
2
seconds
155° F (68°C) About 1 second
Table courtesy of Shriners Burn Institute
TIME / TEMPERATURE RELATIONSHIPS IN SCALDS
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