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TEMPERATURE ADJUSTMENT
To change the temperature setting:
NOTE: It is not necessary to adjust the upper thermostat. However, if
it is adjusted above the factory set point (120°F (49°C)) it is
recommended that it not be set higher than the lower thermostat setting.
1.
Turn off the heater electrical supply. Do not attempt to adjust
thermostat with power on.
2. Remove the thermostat access panels and covers from the
thermostats. Do not remove the plastic personnel protectors
covering the thermostats.
3. Using a flat tip screwdriver, rotate the adjustment knob to
the desired temperature setting.
4. Replace the covers and access panels and turn on heater
electrical supply.
TEMPERATURE SETTINGS
It is recommended that the dial be set lower whenever possible.
Temperature Time to Produce 2nd & 3rd
Setting Degree Burns on Adult Skin
160°F (71°C) About 1/2 second
150°F (66°C) About 1-1/2 seconds
140°F (60°C) Less than 5 seconds
130°F (54°C) About 30 seconds
120°F (49°C) More than 5 minutes
FIGURE 8.
HOTTER WATER CAN SCALD: Water heaters are intended
to produce hot water. Water heated to a temperature which
will satisfy space heating, clothes washing, dish washing,
and other sanitizing needs can scald and permanently injure
you upon contact. Some people are more likely to be
permanently injured by hot water than others. These include
the elderly, children, the infirm, or physically/mentally disabled.
If anyone using hot water in your home fits into one of these
groups or if there is a local code or state law requiring a
certain temperature water at the hot water tap, then you
must take special precautions. In addition to using the lowest
possible temperature setting that satisfies your hot water
needs, a means such as a mixing valve, should be used at
the hot water taps used by these people or at the water
heater. Mixing valves are available from your local plumbing
contractor. Follow manufacturer’s instructions for installation
of the valves. Before changing the factory setting on the
thermostat, see Figure 8.
Never allow small children to use a hot water tap or to draw
their own bath water. Never leave a child or handicapped person
unattended in a bathtub or shower.
It is recommended that lower water temperatures be used
to avoid the risk of scalding. It is further recommended,
in all cases, that the water temperature thermostat be set
for the lowest temperature which satisfies your hot water
needs. This will also provide the most energy efficient
operation of the water heater. Thermostat(s) are factory
set at 120°F (49°C) unless specified differently by state
requirements.
KEEPING THE THERMOSTAT SETTING AT 120°F (49°C)
WILL REDUCE THE RISK OF SCALDS.
Figure 8 shows the approximate time-to-burn relationship for
normal adult skin.
TEMPERATURE REGULATION