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49-6000245 Rev. 0 9
All temperatures listed on the water heater’s gas
control/thermostat are approximate.
Maximum water temperatures occur just after the water
heater has completed a heating cycle. To determine
the water temperature at point-of-use, open a hot water
faucet and hold a thermometer under the stream of
water.
Frequent, short uses of hot water can cause a
phenomenon called stacking, when the temperature
of the water at the top of the tank (closest to pipes
delivering water to the home) exceeds the temperature
at the bottom of the tank (where the gas control/
thermostat is located).
Before use, always test the water temperature with your
hand, keeping in mind that hotter water increases the
danger of scalding.
NOTE: Refer to Water Temperature in Safety
Information, page 5.
The gas control/thermostat is equipped with two safety
shut-off devices:
• One is designed to shut off gas to the water heater’s
burner if the pilot light goes out.
• The other is designed to shut off gas to the burner if
the water heater exceeds normal temperatures.
If one of these safety shut-off devices is activated, refer
to Troubleshooting Tips, page 20.
WARNING
If the water heater overheats or the
gas supply fails to shut off, close the manual gas
shut-off valve.
Turn off gas to the water heater if it has been subjected
to overheating, fire, flood or physical damage. (Refer
to Lighting and Shutdown, page 7.) Do not operate the
water heater again until it has been thoroughly checked
by a qualified service technician.
Do not use or attempt to repair the water heater if any
part has been under water. Immediately call a qualified
service technician to replace the unit.
About the Gas Control/Thermostat
OPERATING INSTRUCTIONS
~ 155°F
~ 150°F
~ 140°F
~ 130°F
~ 120°F
~ 90°F
~ 50°F
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