American Water Heater NonCondensing Outdoor Natural Gas GT910NIE User Manual

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*To change the remote controller’s mode from Default Mode to High Temperature Mode, 
please follow the procedures below (the remote controller  must be installed prior to operating 
these procedures):  
 
        DO NOT set to 185ºF  if you use your  water heater in a recirculation system.  
This will cause damage to the heater and void the warranty.  
 
 
 
1. Turn off power to the remote controller by pressing the “ ON/OFF button.  
 
 
 
 
2. Simultaneously p ress and hold both the “ HOT” and...

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FLOW 
•  The flow rate through the  water heater is limited to a maximum of 14.5 GPM.  
•   The temperature setting, along with the supply temperature of the water will determine the 
flow rate output of the unit.    
•   Please refer to the temperature vs. gallons per minute chart on  p .5 1 to determine the likely 
flow rates based on your local ground water temperature and your desired outlet water 
temperature combination.  
•   Based on the United States Department of 
Energy method of...

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The dark squares indicate the direction 
the dipswitches should be set to. 
TEMPERATURE SETTINGS 
•  The temperature has been preset at the factor y to 120 ºF ( 50 ºC).  
•   There are 8  preset temperatures that you can select from by changing the dipswitch settings 
on the computer board.   If  you want  to change the set temp erature with dipswitches, please 
refer to the diagram below.  These temperatures are available:  100 ºF, 115  ºF, 1 20 ºF,  135  ºF, 
1 45  ºF, 1 55 ºF, 1 65 ºF, and...

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MAINTENANCE AND SERVICE 
 WARNING: Turn off the electrical power supply and close the manual gas 
control valve and the manual water control valve before servicing.  
•  Clean the cold- water inlet filter. (Refer to diagram below)  
•   Be sure that all openings for combustion and ventilation air are not blocked.  
•   The venting system should be checked annually for any leaks, corrosion, blockages or 
damage.  
•   The burner should be checked annually for dust, lint, grease or dirt.  
•...

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GENERAL TROUBLESHOOTING 
~ TEMPERATURE and AMOUNT OF HOT WATER ~ 
PROBLEM POSSIBLE SOLUTIONS 
It takes long time to get hot water at 
the fixtures.  
  •
  The  time it takes to  d eliver hot water from the water 
heater  to your fixtures depends on the length of 
piping between the two. The longer the distance  or 
the bigger the pipes , the longer  it will take  to get hot 
water . 
•   If you would like to receive hot water to  your fixtures 
quicker, you may want to consider a hot water 
r...

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~ WATER HEATER ~ 
PROBLEM POSSIBLE SOLUTIONS 
Unit does not ignite when water goes 
through the unit.
 
 •
  Is th e flow rate over 0. 5 GPM? (p. 30 ) 
•   Check for the fi lter on cold water inlet.  (p. 34 ) 
•   Check for reverse connection and cross connection.  
•   If you use the remote controller, is the  power button 
turned on? (p.  30) 
The fan motor is s till spinning after 
operation has  stopped.
 
  •
  This  is  normal. After operation has  stopped, the fan 
motor keep s running...

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TROUBLESHOOTING – ERROR CODES 
•   The  units  are self diagnostic for safety and convenience when trouble shooting.  
•   If there is a problem with the installation or the unit, it will disp lay a numerical error code on the 
remote controller  (if installed) or on the 7- Seg LED of the central computer board and section 
computer board to communicate the source of the problem.  
•   Consult the following chart for the cause of each error code.  
 
 
 
 
 
 
 
Single Unit 
• The 7-Seg LED...

 
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OPERATING SAFET Y 
  

 
- 39  -  

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Check valve 
Check valve Air 
separator 
Recirculation 
pump 
Hot water outlet to 
fixtures 
Air Vent 
Unions 
Gas supply 
Ball valves 
Expansion tank 
Y-Strainer 
Cold water 
inlet 
Hot
W ate r
O utl et
S
Col d
W at er
I nl et G
as
I nl e t
APPLICATIONS 
 
Space Heating Applications  
WARNING 
•  This water heater is suitable for combination water (potable) heating and space 
heating and not suitable for space heating applications only.  
•   In order  to purge air in water pipes within a...