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About the water temperature setting.
Temperature setpoint:
Safety, energy conservation and hot water capacity are factors
to be considered when selecting the water temperature setting
of the water heater. To comply with safety regulations, the water
temperature setpoint is factory set at 120°F (49°C). This is the
recommended starting temperature setting.
NOTE: According to US Dept of Energy, the average residential
water heater in the US is set at 135°F (57°C). Energy savings
claims are based on a 135°F (57°C) temperature setting. The
water temperature setpoint can be raised from the factory setting
of 120°F to 135°F (49°C to 57°C) without sacrificing the claimed
energy savings. If a lower temperature setting than 135°F (57°C)
is used, greater savings in energy and operating costs may be
achieved.
See "To Adjust the Temperature" section to change the water
heater's temperature.
Hot water capacity:
If more hot water capacity is desired, increasing the temperature
from 120°F to 135°F (49°C to 57°C) will enable the same tank of hot
water to last about 25% longer because more cold water is mixed
in at the shower or faucet.
Time/Temperature Relationship in Scalds
Temperature
120°F (49°C)
125°F (52°C)
130°F (44°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
Risk of Scalding Reminder:
Water temperatures above 125°F (52°C) can cause severe burns
or death from scalding. Be sure to read and follow the warnings
outlined in this manual and on the label on the water heater. This
label is located on the water heater near the upper element access
panel.
See "Time/Temperature Relationship in Scalds" below as a guide in
determining the proper water temperature for your home.
Mixing-valves:
Mixing valves for reducing point-of-use water temperature by
mixing hot and cold water in branch water lines are available.
Contact a licensed plumber or the local plumbing authority for
further information.
DANGER:
There is a hot water scald potential if the
water temperature is set too high. Households with small children,
disabled, or elderly persons may require a 120°F (49°C) or lower
thermostat setting to prevent contact with HOT water.
Time to Produce a Serious Burn
More than 5 minutes
1-1/2 to 2 minutes
About 30 seconds
About 10 seconds
Less than 5 seconds
Less than 3 seconds
About 1-1/2 seconds
About 1 second
To Adjust the Temperature
Follow these steps:
1. Press the UP or DOWN arrow on the control panel key pad
to desired temperature.
2. Press ENTER to accept the new setting.
Note: To change between °F and °C, press and hold MODE.
DANGER:
There is a Hot Water scald Potential
if the water temperature is set too high. 120°F (49°C) is the
recommended starting point for water temperature setting,
but it can be adjusted to any temperature between 100°F and
140°F (38°C and 60°C).
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