American Water Heater NonCondensing Outdoor Natural Gas GT910NIE User Manual

Gas Tankless Water Heater  
910 / 910 ASME  
(T-M50 / T-M50 ASME) Models 
 Suitable for combination potable water heating  
  and space heating.  Please refer to local codes for  
space- heating compliance.  
 
 
  
 
 
 
 
-Do not store or use gasoline or other 
flammable vapors and liquids in the vicinity 
of this or any other appliance. 
- WHAT TO DO IF YOU SMELL GAS  
•   Do not try to light any appliance.  
•   Do not touch any electric switch, do not 
use any phone in your building . 
•...

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          CONTENTS  
 
 
 
 
NOTE 
*All references to the  910 (T -M50)  also refer to the   
  910  ASME  (T-M5 0 ASME) model . 
* Check the rating plate to ensure this product 
matches your specifications.  
 
 
 
 
 
 
 
 
SPECIFICATIONS 
Natural Gas Input  
(Operating Range)  Min: 15,000  Btu/h 
Max:  380,000  Btu/h
 
Propane Input  
(Operating Range)  Min: 15,000 Btu/h 
Max:  380,000  Btu/h
 
Gas Connection  1” N PT 
Water Connections 1” N PT 
Water Pressure 15  - 150 psi  * 
Natural Gas...

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INTRODUCTION 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1. A hot water tap is turned on. 
2.  Water enters the heater.  
3.  The water flow sensor detects the water flow.  
4.  The computer automatically ignites the burner.  
5.  Water circulates through the heat exchanger and then gets hot.  
6.  The c omputer will modulate  the gas supply valve and water flow to produce  the right 
amount of hot wat er at the correct temperature.  
7....

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TWO COMBUSTION SECTIONS WITHIN THE 910 (T-M50)  
 
The  water heater  contains two combustion sections .  The section  that turns on first is whichever 
section  the water heater  decides is the prim ary section.  The moment at which the secondary 
section  fires will depend on the total flow rate and set temperature of the water heater:   
Flow rate at which the secondary section fires  
( GPM ) 
Set temperature of the 910 (T-M50) 
(°F) 
3.2 100-120 
2.9 125,130 
2.6 140 
2.4 145,150 
2.1...

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SAFETY GUIDELINES 
 
• Installation and service must be performed by a qualified installer (for 
example, a licensed plumber or gas fitter), otherwise the warranty by the 
manufacturer  will be void.
 
• The installer (licensed professional) is responsible for t he correct 
installation  of the  water  heater and for compliance with all n ational, 
state/provincial ,  and l ocal codes.
 
PLEASE READ THIS MANUAL CAREFULLY AND FOLLOW ALL DIRECTIO NS. 
 
GENERAL  
1.  Follow all local codes, or in...

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INSTALLATION 
All gas water heaters require careful and correct installation to ensure safe and efficient 
operation. This manual must be followed exactly. Read the “Safety Guidelines” section at the 
beginning of this manual. 
 
• The warranty will not cover damage caused by water quality.  Water 
hardness  that leads to scale formation and/or corrosion  may 
affect/damage the water heater.  Hard water scaling and/or corrosion must 
be avoided or controlled by proper water treatment.  
• The...

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G ENERAL  
 
1. The  manifold gas pressure  is preset at the factory.   It is computer controlled and should 
not need adjustment.  
 
2.  Maintain proper space for servicing.  Install the unit so that it can be connected or 
removed easily.   Refer to p. 9 and p. 10  for proper clearances.
 
 
3.  The electrical connection requires a means  of disconnection, to terminate power to the 
wa ter heater for servicing and safety purposes.
 
 
4.  If  you will be installing the unit in a  contaminated...

 
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WARNING FOR INS TALLATIONS 
FOR YOUR SAFETY, READ BEFORE INSTALLATION:  
Do not install the heater where water, debris 
or flammable vapors may get into the flue 
terminal. This may cause damage to the 
heater and void the warranty. 
 
 
Do not have the vent terminal pointing t oward 
any opening into a building. Do not locate 
your heater in a pit or location where gas and 
water can accumulate. 
 
 
 
 
Do not install this water heater under an 
overhang less than 3 feet from its top or...

 
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The dark square is the direction 
the dipswitch should be set to.  
Keep the clearances. 
OUTDOOR INSTALLATION 
 
1.  Follow all local codes, or in the absence of loc al codes, follow the current edition of the 
National Fuel Gas Code: ANSI Z223.1/NFPA 54 in  the USA  or  B149.1  Natural Gas , 
Propane  Installation Code in Canada.   
2.  Install outdoors only in areas with mild, temperate  climates. 
3.  Ensure that the unit is set for outdoor installation.  Locate the  central  computer board...

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Keep the clearances. 
INDOOR INSTALLATION 
 
1. Follow all local codes, or in the absence of 
loc al codes, follow the most recent edition 
of the National Fuel Gas Code: ANSI 
Z223.1/NFP A 54 in the USA  or  B149.1 
Natural Gas , Propane  Installation Code in 
Canada.   
 
2.  When installed indoors, the  water heater 
shall be located in an area to maintain the 
following minimum clearances around the 
unit:  
 
 
 
 
 
 
 
Combustion Air Supply   
The water heater  location must provide...