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AP18733 REV. 3.2.17
18
▪ G. SCALDING
▪ H. HIGH ELEVATION INSTALLATIONS
DANGER
DANGER
Households with small children, disabled, or elderly persons may require 120
°
F (49
°
C) or lower thermostat setting to prevent contact with “HOT”
water
Natural gas at high elevation might contain less heating value than typical 1,000 BTU/cu ft and therefore can cause improper air / gas mix leading
to improper combustion. For natural gas installations above 3,000 ft, call your gas provider to determine the heating value of the supplied natural
gas.water
APPROXIMATE TIME / TEMPERATURE RELATIONSHIPS IN SCALDS
120°F More than 5 minutes
125°F 1 ½ 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 1 ½ seconds
155°F About 1 second
This 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 temperature. 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, you should install a 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 your local plumbing supplier.
Table 6 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.
To set the water heater to operate at the installation elevation, see INSTALLER MODE, this manual.
Table 6 – Time and Temperature Relationship in Scalds
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