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GAS CONTROL VALVE/THERMOSTAT
ON/OFF
TEMPERATURE
SWITCH
SETTING DIAL
Figure 49.
Approximate
Temperature
Temperature
Dial Setting
°F
VERY HOT
155
C
150
B
140
A
130
HOT
120
LOW
110
VAC
70
Table 10.
WARNING! Higher temperatures increase the risk of
scalding, but even at 120°F, hot water can scald. (See
Table 10). Install Thermostatic Mixing Valve(s) (see
Figure 7) at each point-of-use to reduce the risk of
scalding.
Note: The temperatures indicated are approximate. The
actual temperature of the heated water may vary. In some
cases, repeated small draws of water can cause the
hot and cold water in the tank to "stack" in layers. If this
happens, the water can be as much as 30F° hotter than
the gas control valve setting. This temperature variation is
the result of your usage pattern and is not a malfunction.
Check water temperature at several points of use in your
home (for example, bathtub faucet, shower, or lavatory
sink) and adjust the Thermostatic Mixing Valves (see
Figure 7) as needed.
The Vacation Setting (VAC) sets the controller at
approximately 70°F . This setting is recommended when
the water heater is not in use for a long period of time. This
effectively turns the controller temperature setting down to
a temperature that prevents the water in the water heater
from freezing while still conserving energy.
46
130°F
140°F 150°F
155°F
120°F
110°F
70°F
Time to induce a 2nd
and 3rd Degree burn
to adult skin
Less than 1 second
About 1.5 seconds
Less than 5 seconds
More than 30 seconds
More than 5 minutes
Normal shower temp
N/A
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100304522_2000545236 _Rev. 02
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