American Water Heater Condensing UltraLow NOx Indoor 120000 BTU Liquid Propane GT140PIH User Manual

31  Page
IF YOU SMELL GAS:
•	Do not try to start the water heater
•	Do not touch any electric switches; 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
WARNING
Operation
1.Once the above checks have been completed, please clean filter 
of any debris  Refer to p 41 for instructions
2.Fully open the manual water control...

32  Page
OPTIONAL ITEMS
#Model 140
Indoor
(T-H3M-DV) 140
Outdoor
(T-H3M-OS)
1
Temperature Remote Controller✓Included with the  water heater
2Pipe Cover✓ ✓
3Neutralizer Kit✓✓
44-inch Exhaust Sidewall Vent Terminator (Hood) 
and 4-inch Wall Thimble ✓
53-inch Concentric PVCTermination✓
6 Recess Box✓
The pipe cover protects the plumbing pipes to 
the water heater from unexpected adjustments 
This pipe cover is fixed to the bottom of the water 
heater, which hides the plumbing and...

33  Page
Used when terminating direct-vent (sealed combustion) 
systems, with Indoor models that require a 3 in (76 mm) 
intake and a 3 in (76 mm) exhaust  This concentric 
termination provides the convenience of only having to 
make one penetration through a sidewall instead of two 
separate penetrations for the intake and exhaust piping The 
termination includes a bird screen, restricting small animals, 
pests, and foreign objects from entering into the vent system 
4. 4-inch...

34  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 model number and the 
serial number of your unit written on the rating...

35  Page
OPERATING SAFETY
Operating Safety
Owner's Guide
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...

36  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 Z2122 ・ CSA 44, 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...

37  Page
DISPLAY OF THE CONTROLLER
The	illustration	below	shows	an	example	of	the	display	of	the	controllers.		The	exact	display	may	differ	from	examples.
•	Flow rate to activate the water heater: 05 gallon per minute at the default set  
             temperature (19 L/min)
•	Flow rate to keep the water heater running: 04 gallon per minute (15 L/min)
•	The controllers have an energy saving mode  Five minutes after the water heater 
stops operating, the backlight of the controller...

38  Page
TEMPERATURE SETTINGS
-Using controller-
-Temperature setting on the PCB-
(Without controller)
There are 2 preset temperatures (120 °F (50 °C) and 140 °F (60 °C)) that you can select from by changing 
the DIPswitch settings on the computer board without the controller  See the table below
When the controller is in normal operation, the set temperature of the controller is given
priority over the set temperature of the DIPswitch settings  If the remote becomes disabled, the com-
puter...

39  Page
OperationScreen on the controller
1.Inlet water temperature will be displayed on the 
controller by pressing the "INFO" button
2.Outlet water temperature will be displayed on the 
controller by pressing the "INFO" button
3.Water flow rate, in gpm, will be displayed on the 
controller by pressing the "INFO" button
4.Press the "INFO" button to finish information mode
Inlet water temperature
(EX: 60 °F)
Outlet water temperature
(EX: 120 °F)...

40  Page
FLOW
•	This water heater comes equipped with heating blocks to protect it against damage associated with 
freezing
•	For this freeze protection system to operate, there has to be electrical power to the water heater  
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...