33
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
Operating the water heater
The following is additional information which
aid in determining a safe working temperature to
meet each household need.
Maximum water temperatures occur just after
the burner has shut off. To determine the water
temperature, turn on a hot water faucet and place
a thermometer in the water stream. If an adjust-
ment to the water temperature is preferred, then
refer to the Water Heater User Display – Opera-
tion Instructions for instruction on adjusting
the local and remote user display temperature
setpoints.
A condition known as “stacking” or “layering”
can occur when a series of short and frequent hot
water draws are taken. The hottest temperature
water will be at the top of the tank, closest to the
outlet pipe delivering hot water to the home.
Stacking can cause this top layer of water to be
hotter than the water toward the bottom of the
tank near the gas control (thermostat). Therefore,
always remember to test the water temperature
with your hand before use and remember that
hotter water increases the risk of scald injury.
Also, always supervise young children or others
who are incapacitated.
The gas control (thermostat) is constructed with
a built in safety shut-off device designed to
shut off the gas supply to the burner if the main
burner is extinguished for any reason.
The gas control (thermostat) is also equipped
with a gas shut off device that will shut off the
gas supply to the burner if the water heater
exceeds normal operating temperatures. Refer to
the “Before You Call For Service” section of this
manual, or contact your dealer.
WARNING: Should overheating occur or
the gas supply fail to shut off, turn off the
manual gas control valve to the appliance
If the water heater has been subjected to re,
ood or physical damage, turn off the manual
gas control (shut-off) valve and DO NOT
operate the water heater again until it has been
checked by a qualied service technician.
NOTICE: Do not use this appliance if any
part has been under water. Immediately call a
qualied installer or service agency to replace
a ooded water heater. Do Not attempt to
repair the unit! It must be replaced.
Water Temperature Setting...
90° F
113°F
98°F
105°F
120°F
130°F
140°F
Temperatures are approximate
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