LP-605 Rev. 000 Rel. 009 Date 8.16.18
43
The temperature will change on the water heater display. Adjust
to the desired temperature.
4. Reposition knob to lock position.
5. Retighten screw.
NOTE: To ensure proper operation, the mixing valve temperature
should be set at least 5
o
F below that of the tank setpoint temperature.
Figure 45 - Adjusting Temperature at the Mixing Valve
Hotter water increases the risk of scald injury. Scalding may occur
within 5 seconds at a setting of 140
o
F (60
o
C). Water temperature
over 125
o
F can instantly cause severe burns, or death, from scalds.
Children, disabled, and elderly are at the highest risk of being scalded.
Mixing valve temperature settings should be done by a licensed
contractor per local requirements. To ensure correct temperature
control, check water temperature with a thermometer at a faucet.
Feel water before bathing or showering!
It is recommended to inspect the mixing valve annually. Ensure
the proper water temperature is being delivered. If not, replace the
mixing valve.
E. Water Temperature Adjustment and 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 thermostat on this heater to obtain
the increased water temperature required by these appliances you
may create the potential for scald injury.
To protect against injury, install a mixing valve in the water system. This
valve will reduce point of use discharge temperatures by mixing cold
and hot water in branch supply lines. Such valves are available from
your local plumbing supplier.
Households with small children, disabled, or elderly persons may
require a 120
o
F or lower temperature setting to prevent severe
personal injury or death due to scalding.
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 specically
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.
Approximate Time / Temperature Relationships in Scalds
120
o
F More than 5 minutes
125
o
F 1 1/2 to 2 minutes
130
o
F About 30 seconds
135
o
F About 10 seconds
140
o
F Less than 5 seconds
145
o
F Less than 3 seconds
150
o
F About 1 1/2 seconds
155
o
F About 1 second
Table 25 - Time and Temperature Relationship in Scalds
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