Rheem Residential 30 Use And Care Manual page 20

Operating the water heater.
Water Temperature Setting...
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.
The reference mark "Low" represents an
approximate water temperature of 91°F.
The reference mark "Hot" represents an
approximate water temperature of 125°F.
The reference mark "A" represents an
approximate water temperature of 130°F
The reference mark "B" represents an
approximate water temperature of 140°F
The reference mark "C" represents an
approximate water temperature of 150°F
The reference mark "Very Hot" represents
an approximate water temperature of
155°F
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 combination
gas control (thermostat).
155°F APPROX.
150°F APROX.
140°F APPROX.
130°F APPROX.
125°F APPROX.
120°F APPROX.
90°F APPROX.
20
Temperatures are approximate
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 combination 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 pilot flame is
extinguished for any reason.
The combination gas control (thermostat)
is also equipped with a single use 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 fire,
flood or physical damage, turn off the manual
gas (shut-off) valve, and do not operate the
water heater again until is has been checked by
a qualified service technician.
NOTICE: Do not use this appliance if any
part has been under water. Immediately
call a qualified installer or service agency
to replace a flooded water heater. Do Not
attempt to repair the unit! It must be
replaced.