Safety Precautions - Rheem GHE 119-500 Use & Care Manual

To meet commercial water use needs, the temperature on this
water heater is adjustable up to 180°F (82° 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.
D A N G E R
!
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.
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
HOT
BURN
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.
Time/Temperature Relationship in Scalds
Water Temperature
120°F (49°C)
125°F (52°C)
130°F (54°C)
135°F (57°C)
140°F (60°C)
145°F (63°C)
150°F (66°C)
155°F (68°C)
Table courtesy of Shriners Burn Institute
The temperature of the water in the heater can be regulated by
setting the temperature on the display (see pages 25). To comply
with safety regulations the temperature was set at 120°F before
water heater was shipped from the factory. The illustration infor-
mation on pages 25 shows the Display and how to adjust the
water temperature.
DANGER
!
Hotter water increases the Potential for Hot Water SCALDS.
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. Contact a licensed plumber or the
local plumbing authority for further information.
4
Time To Produce a Serious Burn
More than 5 minutes
1½ to 2 minutes
About 30 seconds
About 10 seconds
Less than 5 seconds
Less than 3 seconds
About 1½ seconds
About 1 second