American Water Heater NonCondensing Outdoor Natural Gas GT110NE user manual

41  Page
WATER CONNECTIONS
All pipes, pipe fittings, valves and other components, including soldering materials, must be suitable for 
potable water systems.
1. A manual shutoff valve must be installed on the cold water inlet to the water heater between the main 
water supply line and the water heater.
2. In addition, a manual shutoff valve is also recommended on the hot water outlet of the unit.  If the 
water heater is installed within, or subjected to, a closed loop water system, a thermal expansion...

42  Page
PROBLEMSOLUTIONS
WATER HEATER
Unit does not ignite 
when water goes 
through the unit.
•	Is the flow rate over 0.5 GPM? (p. 34)
•	Check for the filter on cold water inlet. (p. 40)
•	Check for reverse connection and cross connection.
•	If you use the remote controller, is the power button turned on?
•	Check if the inlet temperature is too high.
The fan motor is 
still spinning after 
operation has stopped.
•	This is normal.  After operation has stopped, the fan motor keeps 
running from 15 to 70...

43  Page
ERROR CODES
-General-
•	The water heaters have self-diagnostic function for safety and convenience when troubleshooting.
•	If there is a problem with the installation or the unit, the 510 (T-D2) model will display a numerical 
error code on the 7-Seg LED on the computer board, and the 110 (T-KJr2) and 310 (T-K4) models will 
display a blinking red LED on the computer board.  If a remote controller is installed, the error codes 
will be displayed on the remote controller.
•	Consult with the table...

44  Page
-Fault Analysis of Error Codes-
If the error code is displayed on the computer board of the water heater or remote controller, please 
check the following.  After checking, consult with the manufacturer.
Troubleshooting
Owner's Guide
110 (T-KJr2) and
310 (T-K4)
510
(T-D2)Malfunction
descriptionDiagnosisRed
 LEDRemoteRemote
7 Seg LED
One Time03031Incorrect 
DIPswitch setting
•	Check the DIPswitch settings on the PCB (Part #701).
Five 
Times
10101Warning for the 
“991” error code 
•	Check the...

45  Page
Troubleshooting
Owner's Guide
110 (T-KJr2) and
310 (T-K4)
510
(T-D2)Malfunction
descriptionDiagnosisRed
 LEDRemoteRemote
7 Seg LED
Two 
Times
39391Air-fuel ratio 
rod failure
•	Check for connection/breakage of wires (Part #709) and/
or soot on the AFR rod (Part #108).
N/AN/A441Flow sensor 
failure (Easy-Link 
System only)
•	Check for connection/breakage of wires and/or debris on 
the flow sensor impeller (Part #402, 717).
Six Times51510Abnormal gas 
solenoid valve
•	Check for...

46  Page
Case assembly
Temperature remote controller
Components Diagram
Owner's Guide
COMPONENTS DIAGRAM
722
110 (T-KJr2) and
310 (T-K4) models
722
510 (T-D2) model
110 Indoor (T-KJr2-IN)110 Outdoor (T-KJr2-OS)
052004
001
720
704
721
052 702
003
052
052
007
002
051
050 052
004
001
704 006
053
005
066
056
052
053
702
052
007
002 050
052004
001
704 006
053
005
066
056
052
053
702
052
007
002050
052
004
001
720
704
721
052
702
052 052
003
007
002 051
050
310 and 510 Indoor
(T-K4-IN and T-D2-IN)
310 and...

47  Page
Components Diagram
Owner's Guide
101
709 111 712
110
065 108
107
106
109 105
104
059
052
053
706 121
703
053
704
705
053 053
059103
112
113
114 708
150
102119151
118
052
062
055
714
053 711
712 053
120 053
067
053
701
713058
115
061
055 401
101
709 111
Burner assembly
Manifold
Assembly
110 Indoor (T-KJr2-IN) only
110 (T-KJr2) model
Burner assembly  

48  Page
Components Diagram
Owner's Guide
Burner assembly
310 (T-K4) and 510 (T-D2) models
A
A
A
105 104
106
107
108
065
110109
401
101
709 111 712
053
052116 053
117 103054
121
706
703
053
704
705
053 121
706
703
053
704
705
053
701
053
053 067
120
053
712 711
053 062
714 066
062
055 052
118
151
119
102
061 708
114
113
150
103
117 053 060
059
116
401
713 058 057
115
101
709 111
053112
055
Burner assembly
Power control
section
310 (T-K4)
model 510 (T-D2)
model
Manifold
AssemblyFan motor section for...

49    Page
Components Diagram
Owner's Guide
Water Way assembly
Bypass 
section
Computer board assembly
701707
710
708
715
716
709
719
718
717
103
719 408 407
402
402
714
709 707
701
710
708 103
110 (T-KJr2) and
310 (T-K4) models
510 (T-D2) model
Water outlet sectionWater inlet sectionExhaust section (Outdoor model)
110 (T-KJr2) model310 (T-K4) model510 (T-D2) model
B
C
B
B
C
C
C B
453
414
401
454
411
459
414
451 063
412450
452 413
463
403
462
458
460456
402
461
458 052
415
064
460
456
404
406
457...

50   Page
Parts List
Owner's Guide
PARTS LIST
Item #Description
Part #
110, 310 and 
510  models
T-KJr2, T-K4 and 
T-D2 models
001Case assembly for 110 Indoor (T-KJr2-IN)
for 110 Outdoor (T-KJr2-OS)
for 310 and 510 Indoor (T-K4-IN and T-D2-IN)
for 310 and 510 Outdoor (T-K4-OS and T-D2-OS)
319143-159
319143-172
319143-151
319143-211
EK415
EK432
EK402
EKK41
002Front cover for 110 Indoor (T-KJr2-IN)
for 110 Outdoor (T-KJr2-OS)
for 310 Indoor (T-K4-IN)
for 310 Outdoor (T-K4-OS)
for 510 Indoor (T-D2-IN)...