Time/Temperature Relationship in Scalds
Water Temperature
Time To Produce a 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
The chart shown above may be used as a guide
in determining the proper water temperature for
your home.
DANGER: Households with small children,
disabled, or elderly persons may require a
120°F (49°C) or lower temperature setting to
prevent contact with “HOT” water.
Maximum water temperature occurs while burner is
on. To find water temperature being delivered, turn
on a hot water faucet and place a thermometer in the
water stream and read the thermometer.
(See page 27 & 28 for more details.)
The temperature of the water at the outlet of the
water heater can be regulated by setting the
temperature on Remote Control. The remote control
was set at 100°F (38°C) before it was shipped from
the factory.
The Figure to the bottom left illustrates the Remote
Control and how to adjust the water temperature.
Notice:
The factory setting allows operating
temperatures between 100°F (38°C) and 120°F
(49°C). Temperatures of up to 140°F (60°C) for
Residential models and up to 180°F (82°C) for
Commercial models can be achieved with the
MAIN (UMC-117) remote control and a dip switch
adjustment. Only qualified service personnel should
perform this adjustment. Only factory authorized
remote control(s) should be used.
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.
DANGER!
WATER TEMPERATURE SETTING
Safety and energy conservation are factors to be considered when selecting the water
temperature setting of a water heater’s remote control. Water temperatures above
125°F (52°C) can cause severe burns or death from scalding. Be sure to read and follow the
warnings outlined on the label pictured below.
4
IMPORTANT SAFETY INFORMATION
READ ALL INSTRUCTIONS BEFORE USING.
Notice:
Only commercial model water heaters can
achieve temperatures up to 180°F (82°C).
* Temperatures above 120°F (49°C) can be achieved
by adjusting the dip switch. See page 35 for dip
switch adjustment.
Notice:
Display
shows
°F only.
