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4
Time/Temperature Relationship in Scalds
Water Temperature Time To Produce a 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
The chart shown above may be used as a guide in
determining the proper water temperature for your home.
DANGER: Households with small children,
disabled, or elderly persons may require a 120°F
(49°C) or lower gas control (thermostat) setting to
prevent contact with “HOT” water.
Maximum water temperatures occur just after the burner
has shut off. To find water temperature being delivered,
turn on a hot water faucet and place a thermometer in the
water stream and read the thermometer. (See page 27 for
more details.)
The temperature of the water in the heater can be
regulated by pressing the temperature buttons on the front
of the gas control (thermostat). To comply with safety
regulations the gas control(thermostat) was set at its
lowest setting before the water heater was shipped from the
factory.
The illustration below details
the approximate water
temperature for each mark on
the Gas Control (Thermostat)
Temperature Dial.
DANGER
!
HOT
Water temperature over 125° F (52°C)
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
!
DANGER!
WATER TEMPERATURE SETTING
Safety and energy conservation are factors to be considered when selecting the water
temperature setting of a water heater’s gas control. Water temperatures above 125°F (52°C) can
cause severe burns or death from scalding. Be sure to read and follow the warnings outlined on
the label pictured below. This label is also located on the water heater.
NOTICE: Mixing valves are recommended for reducing
point of use water temperature by mixing hot and
cold water in branch water lines. It is recommended
that a mixing valve complying with the Standard for
Temperature Actuated Mixing Valves for Hot Water
Distribution Systems, ASSE 1017 be installed. See page
27 for more details and contact a licensed plumber or the
local plumbing authority for further information.
IMPORTANT SAFETY INFORMATION
READ ALL INSTRUCTIONS BEFORE USING
!
VACATION
WARNING
VERY
HOT
WARM
A B C
COOLER
HOTTER
!
DANGER: Hotter
water increases the
potential for Hot Water
SCALDS.
Temperature Setting
Display
▼ A B C
Burns on Adult Skin
WARM = approx. 70°F (21°C)
● ○ ○ ○ ○ ○
--------------------
▼ = approx. 120°F (49°C)
○ ○ ● ○ ○ ○
More than 5 minutes
A = approx. 130°F (54°C)
○ ○ ○ ● ○ ○
About 30 seconds
B = approx. 140°F (60°C)
○ ○ ○ ○ ● ○
Less than 5 seconds
C = approx. 150°F (66°C)
○ ○ ○ ○ ○ ●
About 1-1/2 seconds
C-Flashing = approx. 160°F (71°C)
○ ○ ○ ○ ○ ●
About 1/2 seconds
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