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SCALDING
This water heater can deliver scalding temperature water at any faucet in the system. Be careful whenever using hot
water to avoid scalding injury. Certain appliances such as dishwashers and automatic clothes washers may require
increased temperature water. By setting the thermostat on this water heater to obtain the increased temperature
water required by these appliances, you may create the potential for scald injury. To protect against injury, you
should install an ASSE approved mixing valve in the water system. This valve will reduce point of discharge
temperature by mixing cold and hot water in branch supply lines. Such valves are available from the local plumbing
supplier.
Figure 9. Scald Warning
The following chart 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.
Approximate Time/Temperature Scald Chart
APPROXIMATE TIME/TEMPERATURE
RELATIONSHIPS IN SCALDS
120°F More than 5 minutes
125°F 1½ to 2 minutes
130°F About 30 seconds
135°F About 10 seconds
140°F Less than 5 seconds
145°F Less than 3 seconds
150°F About 1½ seconds
155°F About 1 second
Table 2.
INTERNET VERSION FOR REFERENCE ONLY