American Water Heater NonCondensing Outdoor Natural Gas GT110NE user manual

							31    Page
Owner's Guide
CONGRATULATIONS
Congratulations and thank you for choosing our tankless water heater. 
Before use, we recommend that you read through this safety manual 
carefully.  Please refer to the back of the manual for details about the 
warranty.  Keep this manual for future reference.
If you lose the manual, contact the manufacturer or your local 
distributor.  When you call, please tell us the product name and the 
serial number of your unit written on the rating plate of the water 
heater.
Owner's Guide  
						

							32  Page
Operating Safety
Owner's Guide
OPERATING SAFETY
WARNING: If  you  do  not  follow  these  instructions  exactly,  a  fire  or  explosion  may  result 
causing property damage, personal injury or loss of life.
A.  This appliance does not have a pilot. It is equipped with an ignition device which automatically 
lights the burner.  Do not try to light the burner by hand.
B.  BEFORE OPERATING smell all around the appliance area for gas. Be sure to smell next to 
the floor because some gas is heavier than air and will settle on the floor. 
       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.
          • Immediately call your gas supplier from a neighbor’s phone.  Follow the gas supplier’s
instructions.
          • If you cannot reach your gas supplier, call the fire department.
C.  Use only your hand to turn the gas shutoff valve. Never use tools.  If the valve will not turn by 
hand, don’t try to repair it, call a qualified service technician.  Force or attempted repair may result 
in a fire or explosion.
D.    Do  not  use  this  appliance  if  any  part  has  been  under  water.    Immediately  contact  a  qualified 
installer or service agency to replace a flooded water heater.  Do not attempt to repair the unit!  It 
must be replaced!
1. STOP! Read the safety information above on this label.
2. Turn off all electric power to the appliance.
3. Do not attempt to light the burner by hand.
4. Turn the gas shutoff valve located on the outside of the unit to the closed position.
5. Wait  five  (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 don’t smell gas, go to the next step.
6. Turn the gas shutoff valve located on the outside of the unit to the open position.
7. Turn on all electrical power to the appliance.
8. If  the  appliance  will  not  operate,  follow  the  instructions  in  “To  Turn  Off  Gas  to Appliance,”  and 
call your service technician or gas supplier.
1. Turn off all electric power to the appliance if service is to be performed.
2. Turn the gas shutoff valve located on the outside of the unit to the closed position.
  FOR YOUR SAFETY READ BEFORE OPERATING
OPERATING INSTRUCTIONS
TO TURN OFF GAS TO APPLIANCE  
						

							33    Page
Operating Safety
Owner's Guide
A pressure relief valve listed as complying with the standard for Relief Valve and Automatic Gas Shutoff 
Devices  for  Hot  Water  Supply  System, ANSI  Z21.22 ・  CSA  4.4,  shall  be  installed  at  the  time  of  installation 
of the water heater in the location specified by the manufacturer.  Local codes shall govern the installation of 
relief devices for safety operation of the water heater.  The relief valve must not be removed or plugged.
No valve shall be placed between the relief valve and the water heater.  The relief from the discharge of 
the pressure relief valve shall be disposed of in a suitable place where it will cause no damage.  Also, there 
shall be no other reducing coupling or other restrictions installed on the discharge line to restrict flow.
See  Installation  Manual  heading  “PRESSURE  RELIEF  VALVES”  for  installation  and  maintenance  of  relief 
valve discharge line and other safety precautions.
Vapors from flammable liquids will explode and catch fire causing death or severe burns. 
Do not use or store flammable products such as gasoline, solvents or adhesives in the same room or 
area near the water heater.
Keep flammable products:
1. Far away from heater.
2. In approved containers.
3. Tightly closed and out of reach of children.
4. Water  heater  has  a  main  burner,  which  may 
come  on  at  any  time  and  will  ignite  flammable 
vapors.
Vapors:
1. Cannot be seen.
2. Are heavier than air.
3. Go a long way on the floor.
4. Can be carried from other rooms to the main 
burner by air currents.
Do not install water heater where flammable products will be stored or 
used unless  the  main  burner  is  at  least  18”  above  the  floor.   This 
will reduce, but not eliminate the risk of vapors being ignited by the 
main burner.
Read  and  follow  water  heater  warnings  and  instructions.    If  the  owner’s manual is missing, contact the retailer or manufacturer.
  
Flammable Vapors
FLAMMABLES
1. Water temperature over 125°F (52°C) can cause severe burns instantly or death from 
scalds.
2. Children, disabled and elderly are at highest risk of being scalded.
3. Feel water before bathing or showering.
4. Temperature limiting valves are available.  See manual.
5. The outlet temperature of the water heater is set at 120°F  (50°C).    If  you  require  water  temperatures 
below this setting, follow the instruction manual.
6. Use this heater at your own risk.  Test the water before bathing or showering.  Do not leave children or 
an  infirm  person  unsupervised.    See  your  local  water  supply  company  [plumbing  hardware  retailer]  for 
temperature limiting valves that are available.
BRÛLURE
BURN
CHAUDE
CHAUDE
HOT
HOTCHAUDE
HOT
DANGER
DANGER  
						

							34   Page
NORMAL OPERATION
GENERAL
TEMPERATURE SETTINGS
-With remote controller-
Normal Operation
Owner's Guide
WARNING
•	Hot water temperature above 125 °F (52 °C) can cause 
severe burns instantly or death from scalding. 
•	The outlet hot water temperature of the water heater is 
factory set at 122 °F (50 °C).
•	Feel the water temperature before bathing or showering.
HOT
•	Flow rate to activate the water heater: 0.5 gallon per minute at the default set
                                                                     temperature.
•	Flow rate to keep the water heater running: 0.4 gallon per minute.
NOTICE
1. Open a cold water
fixture.
2. Mix hot water with the cold water 
to get the correct temperature water.
3. When finished, close 
the water fixture.
a)  110 (T-KJr2) and 310 (T-K4) models: 9007666005 (TK-RE02)
 
1. Turn on the 120 VAC power supply to the water heater.
2. Press the "OPERATION" button on the remote in order
to turn the remote controller on. It shows the set
temperature on its display as shown to the right.
3. Press the "HOT" button or the "COLD" button to set the
temperature setting of the unit.
4. You can set the temperature from 99 °F (38 °C) to 122
°F (50 °C).
Increasing temperature from 122 °F (50 °C) to 140 °F (60 °C)
• Press the “HOT” button to set 122 °F (50 °C).
• Press and hold the “INFORMATION” button and the “HOT” button for at least 3 seconds.  The remote 
will emit a beep and change to 131 °F (55 °C).
• Press the “HOT” button to set up to 140 °F (60 °C). 
Increasing temperature above 140 °F (60 °C)
• Press the “HOT” button to set 140 °F (60 °C).
• Press and hold the “INFORMATION” button and the “HOT” button for at least 3 seconds.  The remote 
will emit a beep and change to 158 °F (70 °C).
• Press the “HOT” button to set up to 167 °F (75 °C).
“HOT” Button
“COLD” Button
“OPERATION” Button
“INFORMATION” Button
9007666005 (TK-RE02)
The temperature options
99100102104106108110111113115117122131140158167
(Unit: °F)*
*The remote (9007666005 (TK-RE02)) can display only by degree Fahrenheit.   
						

							35    Page
Normal Operation
Owner's Guide
b)  510 (T-D2) model: 9007603005 (TM-RE30)
“BUZZER”
“HOT”
“COLD”
“ON/OFF”
“TIME”
“INFO”
9007603005 (TM-RE30) 
1. Turn on the 120VAC power supply to the water 
heater.
2. Press the "ON/OFF" button on the remote to turn
the remote controller on. It shows the time and 
set temperature on the display as shown to the 
right.
3. Press the "HOT" button or the "COLD" button to
set the temperature.
You can set the temperature from 100 °F (37 °C) 
to 122 °F (50 °C).
Increasing temperature from 122 °F (50 °C) to 140 °F (60 °C)
• Press the “HOT” button to set 122 °F (50 °C).
• Press and hold the “INFO” button and the “HOT” button for at least 3 seconds.  The remote will emit 
a beep and change to 131 °F (55 °C).
• Press the “HOT” button to set up to 140 °F (60 °C). 
Increasing temperature above 140 °F (60 °C)
• Press the “HOT” button to set 140°F (60°C).
• Press and hold the “INFO” button and the “HOT” button for at least 3 seconds.  The remote will emit 
a beep and change to 158 °F (70 °C) or 149 °F (65 °C) – under High temperature mode. (See below.)
• Press the “HOT” button to set up to 167 °F (75 °C) or 176 °F (80 °C) – under High temperature mode. 
(See below.) 
The remote controller has two temperature range options-Default mode and High temperature mode.
The temperature options
UnitDefault mode
°C 37383940414243444546475055607075
°F100102104106108110111113115117122131140158167
UnitHigh temperature mode
°C 37383940414243444550556065707580
°F100102104106108110111113122131140149158167176
 
To change the remote controller’s mode from Default mode to High temperature mode, please follow 
the procedures on the next page.  
						

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Normal Operation
Owner's Guide
How to change to the High temperature mode
1. Turn off power to the remote controller by pressing the “ON/OFF” button.  (Lamp is OFF to indicate
that power is off.)
2. Simultaneously press and hold both the “HOT” and “COLD” buttons for at least 5 seconds. And then
make sure “1” (or “0”) is displayed on remote controller.
3. Press the “TIME” button. Make sure “OFF” and “F1” are displayed on remote controller.
4. Press the “INFO” button.  After, make sure “OFF” blinks.
5. Press the “HOT” button or the “COLD” button to set display to “on”.
6. Simultaneously press both the “BUZZER” button and the “INFO” button to fix the setting.  Make sure 
the display is no longer blinking.
7. Press the “ON/OFF” button to finish the setting.
8. Turn on power to the remote controller by pressing the “ON/OFF” button again. (Lamp is ON to indicate
that power is on.)
I   N
OUT
FLOWL/MG/M
I   N
OUT
FLOWL/MG/M
“1” is displayed for single unit.
I   N
OUT
FLOWL/MG/M
“0” is displayed for Easy-Link System.
I   N
OUT
FLOWL/MG/M"OFF" blinks.
I   N
OUT
FLOWL/MG/M
"ON" blinks.
I   N
OUT
FLOWL/MG/M"ON" stops blinking.
C)  Other features of the remote controllers
• Features available on 9007666005 (TK-RE02) and 9007603005 (TM-RE30)

If there is a problem with the water heater, the remote controller will sound a buzzer and display the error 
code to inform you the source of the problem.
You can stop the buzzer by pressing : "any button" for 9007666005 (TK-RE02)
"Buzzer button" for 9007603005 (TM-RE30).
For details on the error code, refer to p. 43.
NOTE: If you want to disable the buzzer operation, press and hold the "BUZZER" button for 3 seconds or 
longer. (9007603005 (TM-RE30) only.)

You can get some information about the water heater condition by pressing : 
"INFORMATION" button for 9007666005 (TK-RE02)
"INFO" button for 9007603005 (TM-RE30)
During the information mode, the information will be rotated by pressing the "INFORMATION" or "INFO" 
button as follows:
Inlet water temperatureOutlet water temperatureWater	flowFinish	information	mode  
						

							37    Page

1. Press the "TIME" button, then press the "HOT" or the "COLD" button to set the clock time.
2. Press the "TIME" button again to save and exit.
NOTE: If you want to hide the clock time, press and hold the "TIME" button for 3 seconds or longer.
 
The remote controller has a function that can change units of temperature and flow rate from “°F and 
GPM” to “°C and Liter / min”, please follow the procedures below:
1. Turn off power to the remote controller by pressing the “ON/OFF” button.
(Lamp is OFF to indicate that power is off.)
2. Simultaneously press and hold both the “HOT” and “COLD” buttons for at least 5 seconds. And then 
make sure “1” (or “0”) is displayed on remote controller.
3. Press the “TIME” button. Make sure “OFF” and “F1” are displayed on remote controller.
4. Press the “HOT” button or the “COLD” button to set display to “F3”.
5. Press the “INFO” button. After, make sure “°F” blinks.
6. Press the “HOT” button or the “COLD” button to set display to “°C”.
7. Simultaneously press both the “BUZZER” button and the “INFO” button to fix the setting.  Make sure
display is no longer blinking.
8. Press the “ON/OFF” button to finish the setting.
9. Turn on power to the remote controller by pressing the “ON/OFF” button again.  (Lamp is ON to
indicate that power is on.).
I   N
OUT
FLOWL/MG/M
I   N
OUT
FLOWL/MG/M
“1” is displayed for single unit.
I   N
OUT
FLOWL/MG/M
“0” is displayed for Easy-Link System.
I   N
OUT
FLOWL/MG/M
I   N
OUT
FLOWL/MG/M
Blinking
I   N
OUT
FLOWL/MG/M
Blinking
I   N
OUT
FLOWL/MG/M
Stops blinking
NOTE: Please refer to each manual of the remote controller included with a remote 
controller for more detail.
• Features available only on 9007603005 (TM-RE30)
 
The remote controller has an energy saving mode. The backlight of the LCD in the remote controller will 
be turned off in five minutes after the water heater stops the operation for energy saving.  Once the unit 
is working, the backlight of the LCD is turned back on during the operation.  
						

							38   Page
Normal Operation
Owner's Guide
•	DO NOT adjust the let bank of DIPswitches for the 510 (T-D2) model.
•	Turn off the power supply to the water heater before changing the 
DIPswitch settings.WARNING
110 (T-KJr2) / 310 (T-K4) 
Computer board
DIPswitches
510 (T-D2)
Computer board
DIPswitches (Right bank)
Location of the bank of DIPswitches on the computer board
TEMPERATURE SETTINGS ON THE PCB
-WITHOUT REMOTE CONTROLLER-
Depending on the model, there are 4 or 8 temperatures that you can select from by changing the DIPswitch 
settings on the computer board without the remote controller.  See the table below.
110 (T-KJr2) and 310 (T-K4) models
Temperatures settings
113 °F (45 °C)122 °F (50 °C)
Default131 °F (55 °C)140 °F (60 °C)
ON8
7
6
5
4
3
2
1ON 8
7
6
5
4
3
2
1ON 8
7
6
5
4
3
2
1ON 8
7
6
5
4
3
2
1
510 (T-D2) model
Temperatures settings 
104 °F (40 °C)113 °F (45 °C)122 °F (50 °C)
Default140 °F (60 °C)
ON 6
5
4
3
2
1ON 6
5
4
3
2
1ON 6
5
4
3
2
1ON 6
5
4
3
2
1
NOTE:  Only change the switches with dark squares.  The dark squares
             indicate the direction the DIPswitches should be set to.  
						

							39    Page
FLOW
•	This unit comes equipped with heating blocks to protect it against damages associated with freezing.
•	For this freeze protection system to operate, there has to be electrical power to the unit.  Damage to the heat 
exchanger caused by freezing temperatures due to power loss is not covered under the warranty.  In cases where 
power losses can occur, consider the use of a backup power supply.
•	The freeze protection system will activate when the freeze protection thermostat senses air temperature below 
36.5 °F (2.5 °C).  
•	For the 110 Indoor (T-KJr2-IN), 310 Indoor (T-K4-IN), and 510 Indoor (T-D2-IN) models:
•	In any areas subject to freezing temperatures, the manufacturer highly recommends an indoor instal-
lation with an indoor model.  In such an installation, freezing issues can only occur if cold air enters 
through the venting into the heat exchanger, whether by negative pressures within the installation loca-
tion or by strong outside winds.
•	The manufacturer also highly recommends the use of a backflow preventer (sold separately)
       to minimize the amount of cold air entering through the exhaust venting when the water
       heater is off.
•	It is the installer’s responsibility to be aware of freezing issues and take all preventative measures.  The manufac-
turer will not be responsible for any damage to the heat exchanger as a result of freezing.
•	If you will not be using your heater for a long period of time:
  1.   Completely drain the water out of the unit.  Refer to p. 40.
  2.   Disconnect power to your heater.
 This will keep your unit from freezing and being damaged.
Appliance/UseFlow rate GPM
Lavatory Faucet1.0
Bath Tub4.0 – 10.0
Shower2.0
Kitchen Sink1.5
Dishwasher1.5
Washing machine4.0
Household Flow Rates
Taken from UPC 2006
•	The flow rate through the water heater is limited to a 
maximum of 6.6 GPM for the 110 (T-KJr2) model, 8.0 GPM 
for the 310 (T-K4) model, and 10.0 GPM for the 510 (T-D2) 
model.
•	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 
charts on p. 54 to determine the likely flow rates based 
on your local ground water temperature and your desired 
outlet water temperature.
•	Based on the United States Department of Energy method of testing water heater output, the water heater is 
rated for gallons per hour (GPH) or gallons per minute (GPM) for Natural Gas and Propane, when raising the 
water temperature by 77 °F (from 58 °F to 135 °F). See the diagram below.
•	Refer to the table to the top right for typical household plumbing fixture flow rates to determine what the water 
heater can do in a household application.
Only pipes within the water heater are protected by the freeze protection system. 
Any water pipes (hot or cold) located outside the unit will not be protected. 
Properly protect and insulate these pipes from freezing.CAUTION
FREEZE PROTECTION SYSTEM
Normal Operation
Owner's Guide
Model110 Indoor
(T-KJr2-IN)
110 Outdoor
(T-KJr2-OS)
310 Indoor
(T-K4-IN)
310 Outdoor
(T-K4OS)
510 Indoor
(T-D2-IN)
510 Outdoor
(T-D2-OS)
GPH/GPMGPHGPMGPHGPMGPHGPMGPHGPMGPHGPMGPHGPM
Natural Gas1722.91803.02444.12424.02524.22554.3
Propane1843.11793.02504.22494.22564.32554.3  
						

							40   Page
MAINTENANCE AND SERVICE
•	Clean the cold-water inlet filter. (Refer to Unit draining and filter cleaning section in this page.)
•	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.
•	Keep the area around the water heater clear.  Remove any combustible materials, gasoline or any 
flammable vapors and liquids.
•	In accordance with all local codes and common safety practices, water discharged from the pressure 
relief valve can cause severe burns instantly from scalding.  DO NOT touch the pressure relief valve.
•	If the relief valve discharges periodically, it may be due to thermal expansion in a closed water supply 
system.  Contact the water supplier or local plumbing inspector on how to correct this situation.
•	Visual check of burner flames (see below) through the burner window in the burner assembly located 
at the middle of the water heater.
The manufacturer recommends having the unit checked once a year or as necessary by a licensed 
technician.  If repairs are needed, any repairs should be done by a licensed technician.
UNIT DRAINING and FILTER CLEANING
Turn off the electrical power supply and close the manual gas shutoff valve 
and the manual water control valve before servicing.
WARNING
1. Close the manual gas shutoff valve.
2. Turn off power to the unit and wait a couple of seconds. 
Turn on again.
3. Wait 30 seconds, and then turn off power to the unit, 
yet again.
4. Close the water shutoff valve.
5. Open all hot water taps in the house.  When the 
residual water flow has ceased, close all hot water taps.
6. Have a bucket or pan to catch the water from the unit’s 
drain plugs.  Unscrew the two drain plugs (large and 
small) to drain all the water out of the unit.
7. Wait a few minutes to ensure all water has completely 
drained from the unit.
8. Clean the filter: Check the water filter located within 
the cold inlet.  With a tiny brush, clean the water 
filter of any debris which may have accumulated and 
reinsert the filter back into the cold water inlet.
9. Securely screw the drain plugs back into place. 
     Hand- tighten only.
Drain plugwith Filter(Large)
Gas valve
Drain plug(Small)
Water valve
Normal Operation
Owner's Guide
Blue flame
SatisfactoryUnsatisfactory
Flame blowing up
Unsatisfactory
Red or Yellow flame