Rheem Tankless Water Heater User Manual
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
DANGER: There is a hot
water scald potential
if the temperature is set
too high. 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.
if the temperature is set
too high. 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.
!
Water Temperature Setting
The temperature of the water in the water
heater can be regulated by setting the
temperature on the front of the remote
control.
heater can be regulated by setting the
temperature on the front of the remote
control.
Safety factors should be considered when
selecting the water temperature setting of the
water heater’s remote control.
selecting the water temperature setting of the
water heater’s remote control.
The remote control was set at 100°F (38°C)
before the water heater was shipped from the
factory. This is the recommended starting
point.
before the water heater was shipped from the
factory. This is the recommended starting
point.
Water temperatures above 125°F (52°C) can
cause severe burns or death from scalding.
cause severe burns or death from scalding.
Be sure to read and follow the warnings
outlined in this manual and on the label
located on the water heater.
outlined in this manual and on the label
located on the water heater.
Mixing valves are available for reducing
point of use water temperature by mixing
hot and cold water in branch water lines.
Contact a licensed plumber or the local
plumbing authority for further information.
(See page 4 for more details.)
point of use water temperature by mixing
hot and cold water in branch water lines.
Contact a licensed plumber or the local
plumbing authority for further information.
(See page 4 for more details.)
The chart below may be used as a guide in
determining the proper water temperature
for your home.
determining the proper water temperature
for your home.
Safety Precautions
Do turn off manual gas shut-off valve if water heater has
been subjected to overheating, fire, flood, physical
damage or if the gas supply fails to shut off.
been subjected to overheating, fire, flood, physical
damage or if the gas supply fails to shut off.
Do Not turn on water heater unless water and gas
supplies are fully opened.
supplies are fully opened.
Do Not turn on water heater if cold water supply shut-off
valve is closed.
valve is closed.
Do Not allow combustible materials such as newspaper,
rags or mops to accumulate near water heater.
rags or mops to accumulate near water heater.
Do Not store or use gasoline or other flammable vapors
and liquids, such as adhesives or paint thinner, in vicinity
of this or any other appliance. If such flammables must
be used, open doors and windows for ventilation, and all
gas burning appliances in the vicinity should be shut off
including their pilot lights, to avoid vapors lighting.
and liquids, such as adhesives or paint thinner, in vicinity
of this or any other appliance. If such flammables must
be used, open doors and windows for ventilation, and all
gas burning appliances in the vicinity should be shut off
including their pilot lights, to avoid vapors lighting.
NOTICE: Flammable vapors can be drawn by air currents
from surrounding areas to the water heater.
from surrounding areas to the water heater.
If there is any difficulty in understanding or following the
Operating Instructions or the Care and Cleaning section,
it is recommended that a qualified person or serviceman
perform the work.
Operating Instructions or the Care and Cleaning section,
it is recommended that a qualified person or serviceman
perform the work.
Operating the water heater:
27