American Water Heater 74 Gallon 75100 BTU UltraLow Nox High Recovery Natural Gas Water Heater UBG6275T75S4NV user manual

11 FIGURE 6. WIRING DIAGRAM AND SCHEMATIC
HEATER WIRING
All electrical work must be installed in the United States in accordance with the current edition of the National Electrical Code ANSI/NFPA  No. 
70, in Canada, must conform to all local code authority having jurisdiction.  AN ELECTRICAL GROUND IS REQUIRED TO REDUCE RISK OF 
ELECTRICAL SHOCK OR POSSIBLE ELECTROCUTION.
If any of the original wire as supplied with the appliance must be replaced, use only type 105°C thermoplastic or equivalent, 250°C...

125. Wait fi ve (5) minutes                   to clear out any gas.  
If you then smell gas,           STOP!  Follow B in 
the safety information                above on this label.
  If you dont smell gas, go to next step.
6.  Turn on all electrical power to the appliance.
7.  Set thermostat to desired setting by fi rst pressing the 
COOLER 
  and HOTTER   buttons together and 
holding for 1 second. Then press the HOTTER 
   
button.
8.  If the appliance will not operate, follow the 
instructions TO TURN...

13.                             
SETTING THE WATER HEATER TEMPERATURE AT 120°F (49°C) 
(APPROX.  MARK ON FACE OF THE TEMPERATURE ADJUSTING 
DIAL) WILL REDUCE THE RISK OF SCALDS. Some States or Provinces 
require settings at specifi c lower temperatures.
Figure 6 shows the approximate water temperatures produced at various 
thermostat settings. Short repeated heating cycles caused by small hot 
water uses can cause temperatures at the point of use to exceed the 
thermostat setting by up to 20°F (11°C). If...

14
Type of Gas BTU Per Cu. Ft.Time Required To Consume 1 Cu. 
Ft. of Gas
Natural 1050 50.3 Seconds
CHECKING VENTING
The following steps shall be followed with each appliance connected 
to the venting system placed in operation, while any other appliances 
connected to the venting system are not in operation.
1.  Seal any unused openings in the venting system.
2.    Inspect the venting system for proper size and horizontal pitch, as 
required in the National Fuel Gas Code, ANSI Z223.1/NFPA 54...

15  •  To check UN•LIME for continued use or reuse, place some lime 
scale or white chalk into a glass with a small amount of solution.  If 
the material is vigorously dissolved by the solution, the UN•LIME 
can be reused.  If not, the UN•LIME has been weakened and 
should be replaced.
8.  When deliming has been completed, the heater should be fl ushed 
for 3 to 5 minutes with fresh water.
  •  Remove the deliming equipment, install the drain valve, open the 
cold water inlet line and allow water to fl ow...

16
CHECKLIST
Before contacting your dealer, check the water heater to see if the apparent 
malfunction is caused by some external fault. Consulting this checklist 
may eliminate the need for a repair call and restore hot water service.
NOT ENOUGH OR NO HOT WATER
1.  Look  for leaking or open hot water faucets.  Check for excessive 
usage.
2.  Your gas company can check the gas input to the heater to see that 
it is correct.  An underfi red heater will not produce hot water at its 
normal recovery rate.
3....

17 Restart the water heater as directed under Operating Your Water 
Heater. See the repair parts illustration for anode rod location.
                 
Figure 9
SERVICE AND REPAIR
The water heater requires no special care other than the normal 
maintenance as noted above.  If you are having a problem with your 
water heater, before calling for service please refer to the following 
TROUBLESHOOTING sections.  If service becomes necessary, 
contact your dealer, installer or an authorized service agent.  Do...

18
TROUBLESHOOTING 
For your safety, water heater service should be performed only by a qualifi ed service technician.  
Read the GENERAL SAFETY INFORMATION section fi rst. 
PROBLEMPOSSILBE MALFUNCTIONSERVICE TO BE PERFORMED
NOT ENOUGH OR NO HOT WATER1) Blower will not run.
A) ON/OFF control switch turned off. Turn switch to the on position.
B) Blower unplugged. Plug blower back into 115 vac. outlet.
C) No power at outlet. Repair service to outlet.
D) ON/OFF switch defective. Replace switch.
E) Control...

19
  WARNING:  DO NOT BY-PASS ANY CONTROLS TO MAKE HEATER OPERATE. 
OPERATE ONLY AS WIRED FROM FACTORY.
TROUBLE SHOOTING
Please check guidelines below.  For your safety, water heater service should be performed only by a qualifi ed service technician.  
Read the GENERAL SAFETY INFORMATION section fi rst.
# LED STATUS PROBLEM SOLUTION
1
The gas control valve/thermostat 
has sensed inadequate or no earth 
ground.1  Ensure the wall outlet (power supply) is properly 
grounded.
2  Ensure all ground...

20
# LED STATUS PROBLEM SOLUTION
7
8
9
Self diagnostic check has detected 
a problem with the gas valve driver 
circuit, internal microprocessor, or 
other internal circuits.1  Turn the power off for 10-20 seconds then on again to 
clear these error codes.
2  If any of these error codes persist or cannot be cleared 
- replace the gas control valve/thermostat.
10
The gas control valve/thermostat 
has sensed main burner fl ame out 
of proper sequence.1  Turn the power off for 10-20 seconds then on again to...