State GS6 50 UOCT - Manual (Page 22)

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the gas supply to the burner if poor combustion is sensed
(caused by a blocked vent or insufficient combustion air). If
the gas control valve/thermostat shuts off the gas supply,
check the diagnostic flash code and refer to the “Status
Light Code Troubleshooting Chart.” If necessary, also refer
to the “Troubleshooting Chart.”
IMPORTANT: Correct any issues prior to resetting the
gas control valve/thermostat. For service information,
reference the telephone number on the warranty sheet that
was included with this manual.
Reset the system by following these steps: 1.) Turn the
temperature adjustment knob to OFF. 2.) Unplug the
thermopile plug from the gas control valve/thermostat.
3.) Wait for about three minutes. 4.) Plug the thermopile
plug back into the gas control valve/thermostat. 5.) Turn
the temperature adjustment knob to PILOT and restart the
water heater as directed in this manual.
A temperature limit switch or ECO (Energy Cut Off) sensor
located in the gas control valve\thermostat is used to shut
off the water heater if the water temperature exceeds
189°F (87°C).
The Diagnostic Status Light will flash a code indicating
an “Overheat Failure” (4 Flashes). See “Operating the
Temperature Control System.” If the ECO has functioned
the gas control valve/thermostat should be replaced by
a qualified person. Contact your local dealer for service
information.
Anode Rod/Water Odor
Each water heater contains at least one anode rod, which
will slowly deplete (due to electrolysis) prolonging the life
of the water heater by protecting the glass-lined tank from
corrosion. Adverse water quality, hotter water temperatures,
high hot water usage, hydronic heating devices, and water
softening methods can increase the rate of anode rod
depletion. Once the anode rod is depleted, the tank will
start to corrode, eventually developing a leak.
Certain water conditions will cause a reaction between the
anode rod and the water. The most common complaint
associated with the anode rod is a “rotten egg smell”
produced from the presence of hydrogen sulfide gas
dissolved in the water.
IMPORTANT: Do not remove this anode rod permanently
as it will void any warranties. A special anode rod may be
available if water odor or discoloration occurs.
NOTE: This anode rod may reduce but not eliminate water
odor problems.The water supply system may require
special filtration equipment from a water conditioning
company to successfully eliminate all water odor problems.
Artificially softened water is exceedingly corrosive because
the process substitutes sodium ions for magnesium and
calcium ions. The use of a water softener may decrease
the life of the water heater tank.
The anode rod should be inspected after a maximum of
three years and annually thereafter until the condition of the
anode rod dictates its replacement.
NOTE: Artificially softened water requires the anode rod to
be inspected annually.
The following are typical (but not all) signs of a depleted
anode rod:
•
The majority of the anode rod’s diameter is less than 3/8”.
• Significant sections of the support wire (approx. 1/3 or
more of the anode rod’s length) are visible.
If the anode rod show signs of either or both it should be
replaced. NOTE: Whether re-installing or replacing the
anode rod, check for any leaks and immediately correct if
found.
In replacing the anode:
1. Turn off gas supply to the water heater.
2. Shut off the water supply and open a nearby hot water
faucet to depressurize the water
tank.
3. Drain approximately 5 gallons
of water from tank. (Refer to
“Draining and Flushing” for proper
procedures). Close drain valve.
4. Remove old anode rod.
5. Use Teflon® tape or approved pipe
sealant on threads and install new
anode rod.
6. Turn on water supply and open a
nearby hot water faucet to purge air
from water system.
7. Check for any leaks and
immediately correct any if found.
8. Restart the water heater as directed in this manual.
See the Repair Parts Illustration for anode rod location.
TEFLON ® is a registered trademark of E.I. Du Pont De Nemours and Company.