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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 26 & 27 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 diagram 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 85°F (29°C) and above 120°F (49°C) can be achieved
with the MAIN (UMC-117) remote control. Temperatures
of 85°F (29°C) can be achieved with the Bath (USC-117
or USC2-117) remote control. 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.
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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.
IMPORTANT SAFETY INFORMATION
READ ALL INSTRUCTIONS BEFORE USING.
!
°F
PRIORITY
POWER
ON/OFF
Higher (Hotter) Lower (Cooler)
100 102 104 106 108 110 112 114 116 118 120* 125 130 135 140 °F
38 39 40 41 42 43 44 46 47 48 49* 52 54 57 60 °C
85
29
* Temperatures 85°F(29°C) and above 120°F (49°C)
can be achieved with the Main (UMC-117) remote
control. See page 34 & 35 for minimum and
maximum temperature adjustment.
Notice:
Display
shows
°F only.
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