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Installation Manual
Bosch Tronic TR4000C Electric Tankless Water Heaters - BTC 722203301 A (08.2022)
Scalding
This water heater can deliver scalding water. Be careful whenever using hot water
to avoid scalding injury. Certain appliances such as dishwashers and automatic
clothes washers may require increased water temperatures. By setting the power
selector on this heater to obtain the increased water temperature required by these
appliances you may create the potential for scald injury.
Table 1 details the relationship of water temperature and time with regard
to scald injury and may be used as a guide in determining the safest water
temperature for your applications.
Temperature Time to Produce Serious Burn
120 °F (48 °C) More than 5 minutes
125 °F (51 °C) 1.5 to 2 minutes
130 °F (54 °C) Approx. 30 seconds
135 °F (57 °C) Approx. 10 seconds
140 °F (60 °C) Less than 5 seconds
145 °F (62 °C) Less than 3 seconds
150 °F (65 °C) Approx. 1.5 seconds
155 °F (68 °C) Approx. 1 second
Table 1
The recommended hot water outlet temperature is 118°F. If the water heater
is going to have a set temperature above 120°F, it is recommended to use an
ASSE 1017 rated mixing valve to avoid severe burns or death from scalding
temperatures.
WARNING: SCALD HAZARD
Scald injury is heightened by increased water temperatures.
Hot water can produce 3rd degree burns in 6 seconds at
140°F and in 30 seconds at 130°F.
If the Water Heater thermostat is set too high there is
Serious Potential for SCALDING.
Households with small children, disabled, or elderly persons
may require a 120°F or lower temperature setting.
An ASSE 1017 or ASSE 1070 temperature limiting or
mixing valve is recommended in installations servicing
disabled or elderly persons, or children. Mixing valves do not
eliminate the risk of scalding. To avoid scalding:
— Set the water heater set point temperature as low as
possible.
— Feel water before bathing or showering.
If thermostatic valves are required, use devices specifi
cally designed for such purpose. Install these devices in
accordance with instructions provided by the manufacturer.
Failure to install a temperature limiting or mixing valve and
follow these instructions could result in property damage,
severe personal injury, or death due to scalds.
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