American Water Heater PowerVent, Use & Care Manual

Page: 24 / 36

24
Water Temperature Setting…
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 set-
points.
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
hatter than the water toward the bottom of the
tank near the gas control (thermostat). There-
fore, always remember to test the water tempera-
ture 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 “Be-
fore 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 fire,
flood 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
qualified service technician.
NOTICE: Replace any part of the gas control
system which has been under water.
Time/Temperature Relationship in Scalds
Water Temperature Time To Produce a 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
155°F About 1 second
Table courtesy of Shriners Burn Institute
Operating the water heater.