Rheem Light Duty Commercial Electric Water Heater - Manual (Page 3)

To meet commercial water use needs, the thermostat on this
water heater is adjustable to deliver water up to 170°F. However,
water temperatures over 125°F. 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 on the thermostat. The most
energy efficient operation will result when the temperature setting
is the lowest that satisfies the needs consistent with the
application.
Maximum water temperatures occur just after the thermostat has
shut off the elements. To find the hot water temperature being
delivered, turn on a hot water faucet and place a thermometer in
the hot water stream and read the thermometer.
The following chart details the relationship of water tem-
perature and time with regard to scald injury and may be
used as a guide in determining the safest water tempera-
ture for your applications.
The temperature of the water in the heater can be regulat-
ed by adjusting the thermostat. To comply with safety reg-
ulations the thermostat was set at the factory to a setting
corresponding to 120°F (49°C).
The illustration above shows the temperature adjustment
dial used for setting the water temperature. Refer to Op-
eration section of this manual for detailed instructions in
how to adjust the thermostat(s).
Hotter water increases the potential for Hot Water SCALDS.
NOTICE: When this water heater is supplying general purpose
hot water requirements for use by individuals, a thermostatically
controlled mixing valve for reducing point of use water
temperature is recommended to reduce the risk of scald injury.
Contact a licensed plumber or the local plumbing authority for
further information.
General Safety Precautions
!
Be sure to read and understand the entire Use & Care Manual before attempting to install or operate this water heater. Pay particular attention to the
following General Safety Precautions. Failure to follow these warnings could result in serious bodily injury or death . Should you have any problems un-
derstanding the instructions in this manual, STOP, and get help from a qualified installer or service technician or the local utility.
Temperature Time to Produce 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
TIME / TEMPERATURE RELATIONSHIPS IN SCALDS
R E S E T R E S E T
TURN OFF
POWER
BEFORE
SERVICING
110
120
130 140 150
160
170
DANGER !
Thermostat Dial
Pointer
Reset Button
Thermostat Protective
Cover
D A N G E R
!
HOT
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.
BURN
CAUTION!! — Hotter water increases the risk of SCALDING!
3