American Water Heater 30 Gallon UltraLow NOx Natural Gas Water Heater GU6130T30 User Manual

21
Operating the Temperature 
Control SystemFigure 19B: Status Codes
VAC
List of status codes are shown
at top of gas control valve/thermostat.
Water Temperature Adjustment
The water temperature setting can be adjusted from 55°F 
to 155°F. Turn the Gas Control/Temperature Knob to the 
desired setting/temperature.
NOTE: The temperatures indicated are approximates. The 
actual temperature of the heated water may vary.  Also, 
some models are certified for 180°F outlet temperatures. 
See the Data Plate on...

22associated 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 rod permanently as it will 
void any warranties. A special anode rod may be available 
if water odor or discoloration occurs.
NOTE: This 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....

23
MAINTENANCE OF YOUR WATER HEATER
Draining and Flushing
It is recommended that the tank be drained and flushed 
every 6 months to remove sediment which may build up 
during operation. The water heater should be drained if 
being shut down during freezing temperatures. To drain the 
tank, perform the following steps:
1.  Turn off the gas to the water heater at the manual gas 
shut-off valve.
2.  Open a nearby hot water faucet until the water is no 
longer hot.
3.  Close the cold water inlet valve.
4....

24
Replacement Parts
IMPORTANT: The following maintenance procedures are 
for the Flame Guard™ Safety System components and 
should be performed by a qualified person.
Replacement parts may be ordered through your plumber 
or the local distributor. Parts will be shipped at prevailing 
prices and billed accordingly. When ordering replacement 
parts, always have the following information ready:
1.  model, serial, and product number
2.  type of gas
3. item number
4. parts description
See pages 32-33 for a...

25
Replacing the Pilot/Thermopile Assembly
1.  Remove the burner assembly. See Removing the Burner Door Assembly  Section.
2.  Lift the retainer clip straight up from the back of the manifold component block (using a flat-blade 
screwdriver), then remove the manifold component 
block from the burner door (Figure 25). IMPORTANT: 
Be careful not to bend or alter the position of the pilot 
tube. Note the placement/order of the wires in the 
manifold component block.
Figure 25 
Manifold Component
Block...

26
Pilot Thermopile Pilot/Thermopile
AssemblyPilot Tube
(Ferrule Nut 
Not Shown) Igniter 
Connector
Thermopile
Connectors Figure 28
Pilot/Thermopile Assembly
(50K Models)
6.  Push the new pilot/thermopile assembly connectors 
through the opening in the burner door (See Figure 27). 
Do not to scrape or nick the wires during installation. 
IMPORTANT: DO NOT USE PILOT/THERMOPILES 
WITH FIBERGLASS SLEEVES. The replacement kit 
does not contain a fiberglass sleeve over the pilot/
thermopile wires.
7.  Attach...

27 if the door gasket does not create a seal between the 
burner door and the combustion chamber.
6.  Reconnect the manifold tubing (3/4” wrench), pilot 
tubing (7/16” wrench), temperature sensor wires, and 
thermopile wires to the gas control valve/thermostat. 
(See Figure 22 for the correct position of the thermopile 
wires.)  Do not cross-thread or apply any thread sealant 
to the fittings. NOTE: If installing a new pilot tube 
install the provided ferrule nut in the gas control valve/
thermostat at...

28
Flame Guard™ Safety System Operational Checklist
TROUBLESHOOTING CHART
4.  Manifold component block properly installed.
5.  No leaks at pilot and manifold connection.
6.  Burner door screws securely tightened.  1.  Burner door gasket properly sealed.
2.  Viewport not damaged or cracked.
3.  Flame-trap free of debris and undamaged.
PROBLEM POSSIBLE CAUSE(S) CORRECTIVE ACTION
BURNER WILL NOT IGNITE 1.  Pilot not lit
2.  Thermostat set too low
3. No gas
4.  Dirt in the gas lines
5.  Pilot line clogged
6....

29
PROBLEM POSSIBLE CAUSE(S) CORRECTIVE ACTION
PILOT WILL NOT LIGHT OR 
REMAIN LIT (continued)9.  ECO switch open
10.  Pilot line or orifice clogged
11. Non-functioning thermopile
12.  Air for combustion obstructed
13.  Flammable vapors incident, Flame Guard™ 
function utilized9.  Replace gas control valve/thermostat
10.  Clean, locate source and correct
11. Replace thermopile
12.  See maintenance section for inspection and   
cleaning of flame trap 
13.  Replace water heater, eliminate flammable 
vapors...

30
STATUS LIGHT CODE TROUBLESHOOTING CHART 
LED STATUS PROBLEM CORRECTIVE ACTION
0 FLASHES (LED NOT LIT) Pilot light is not lit. Not enough 
power (millivolts) to keep it lit.Follow the lighting instructions on the front of the 
water heater and record any diagnostic codes. 
See Status Light Codes section.
1 FLASH (EVERY 3 SECONDS) Normal operation. No corrective action necessary.
2 FLASHES Insufficient power (millivolts) to the 
gas control valve/thermostat.1.  Check all wiring connections. If problem...