American Water Heater NonCondensing Outdoor Natural Gas GT910NIE User Manual

							 - 41 - 
Dual-purpose hot water heating (Domestic and Space Heating):  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Priority Control Devices  such as a flow switch, an Aquastat or other electronic controller can be used to 
prioritize the domestic water system over the heating system.  
Warning:  Follow all local codes, or in the absence of local codes, follow the most recent edition of the 
National Standard Code, ANSI Z21. 10.3.  
Warning:  This illustration is a concept design only.  The reference to the 1/8
th hole in check is only for 
the State of Massachusetts. There are a wide variety of variations t o the application of controls and 
equipment presented. Designers must add all necessary safety and auxiliary equipment to conform to 
code requirements and design practice.  For more details, contact the manufacturer . 
 
 
 
* The circulation pump is to provide no less than 2 GPM and no more than 4 GPM through each activated 
unit in the system.  
 
 
Takagi
P
T
An approved Pressure Only Relief Valve, Tie to Location approved by Local Codes and Must Meet BTU Rating of Takagi Model Used
Unions
5 Gas Exhaust Vent (Discharge Must Comply with Local and State Codes).  Can Not Be Common Vented with Other Appliances   Atmospheric Vacuum Breaker
Pump (Must Be Sized Properly With Each Application).  Pump Shall Run 60 Seconds Every 6 Hours
Pressure   Gauge
Apply Correct Thermal Expansion Tank-Size Per Application
Tempered Water To House
Cold Inlet
Shut-Off Valve
Check Valve Will Have 1/8 Hole in Check, As Per Mass. Code
ThermometerThermostatic Mixing Valve
Shut-Off Valves
Check Valve
Hot Water Outlet
Cold Water Inlet
T-Handle Gas Shut-Off Valve
**Maximum allowable distance of 50-Ft. from water heater and heating panel
Heating Coil (used with air-handler)
Diagramatic Layout of Radiant Heating and 
 Domestic Water Heater Per Mass. Code
Thermometer
Check Valves
Gas InletDrain PlugWater Filter
120 VAC Switch or Outlet
An approved Pressure Only Relied 
Valve, Tie to Location approved By 
Local Codes and Must Meet BTU 
Rating of water heater Model Used  
 
  
						

							 - 42 - 
ADDITIONAL  C LEARANCES  
Please follow all local and national codes in regards to proper termination clearances.  In the absence of 
such codes, the following clearances can be used as guidelines.  Local codes supersede these 
guidelines.   
For sidewall terminations 
 
 
Exhaust termination 
1ft. 
1ft. 
2ft. 
Inside 
corner  Air supply inlet 
3ft. 
3ft. 
3ft. 
Direct-Vent termination 
1ft. 
1ft. 
Inside 
corner 
2ft. 
For multiple sidewall exhaust 
terminations (e.g. multi -unit 
systems), an exhaust termination 
must be at least 1 ft. away fr om 
another exhaust termination.  An 
exhaust termination must also be 
at least 2 ft. away from an inside 
corner (if the adjacent wall is less 
than 2 ft. of length, the minimum 
required distance away from the 
inside corner will be equal to the 
length of the  wall).       
For Direct-Vent sidewall 
terminations that use two 
separate penetrations for the 
intake and exhaust, distance 
the intake and exhaust 
terminations at least 3 ft. away 
from each other, no matter the 
orientation.       
For multiple-unit, direct-vent 
sidewall terminations that combine 
the intake and exhaust into a single 
penetration, space each d irect-v ent  
termination at least 1 ft. away from 
each other, no matter the 
orientation.  A  direct -v ent  
termination  must also be at least 2 
ft. away from an inside corner (if the 
adjacent wall is less than 2 ft. of 
length, the minimum required 
distance away from the inside 
corner will be equal to the length of 
the wall).            
 A 
 A 
2ft. 
Exhaust 
termination 
Air intake 
 A 
 
A 
 A 
Air intake 
Exhaust termination 
For multiple-unit rooftop terminations (whether for standard indoor or Direct-
Vent  installations) space all exhaust and intake terminations in accordance 
with local codes.  An exhaus t termination must be spaced from a wall or 
surface in accordance with local codes as well.  In the absence of such a 
code, an exhaust termination must be a horizontal distance of at least 2 ft. 
away from a wall or surface.           
Exhaust and/or Direct-Vent 
sidewall terminations should 
be at least 2 ft. away from an 
opposite surface/wall.  Do not 
place the termination directly 
in front of an opening into a 
building.    
 
 
A: in accordance with local codes 
For rooftop terminations 
2ft. 
Exhaust 
termination   
						

							 - 43 - 
OPTIONAL ITEMS 
 
1. Temperature remote controller: 9007603005 
(TM-RE30)  
The  temperature  remote 
c ontroller has two functions.  It 
allows the output temperature fro m the water heater  to be 
adjusted within the range of 100 °F to 18 5 °F, and it also works as a diagnostic tool that 
will give a concise error code whenever there is a problem with the unit. The temperature options are  100 °F, 105  °F,  110 °F, 
1 15  °F, 120  °F, 125 °F, 1 30 °F, 135  °F, 140 °F, 1 45 °F, 
1 50  °F, 1 55 °F, 160  °F, 165  °F, 170  °F, 1 75  °F, 1 80  °F 
and  185  °F.  See the trouble
shooting section for 
information on possible error codes. 
2. Multi-unit controller: 9007675005 (TM-MC01) 
9008300005  (TM-MC02 ) 
 
The m ulti-unit  controller can 
control  a maximum  of 10  water 
heater s, from 15,000 BTU to 
3 ,800,000 BTU.   It also works as a 
diagnostic tool that will give a 
concise error code whenever there 
is a problem with the unit.  
The multi -unit controller comes 
with a remote controller.
 
3. 5” Backflow preventer and F-F adaptor: 
9008202005 
T here are two functions available for  
this adaptor which can be connected 
with the water heater and NovaVent 
venting line and prevents the backflow 
of air  through  the exhaust vent. This 
helps prevent harmful exhaust gases 
from entering the home, as well as 
helping to prevent the unit from 
fre ezing in areas where cold air can 
be blown or drawn into the exhaust 
system. Install this adaptor in accordance with the 
installation instructions that are packaged with the 
adaptor and any applicable codes. 
4. Vent cap: 9007677005 (TM-VC50) 
 
The  vent  cap is for 
outdoor installation with 
the  910 (T -M50)  water 
heater . 
The cap is 
installed on the top of 
the unit, instead of 
connecting an exhaust 
vent pipe.  The cap will 
prevent any debris that might be in the environment 
from  entering the unit and causing damage or a fire 
hazard, as well as preventing rain or other weather 
from entering the unit.  
5. Direct-vent conversion kit: 9007669005 (TM-
DV50) 
This kit can be used to  convert the 
910  (T -M50)  from a conventional vent 
system to a d irect-v ent  
(or sealed 
combustion) system. This is a CSA 
tested conversion kit. Install this 
conversion kit in accordance with 
the manufacturer’s installation 
instructions and any applicable 
codes.  
6. Pipe cover: 9007673005 (TM-PC50) 
 
The pip e cover protects the 
plumbing pipes to  the 910  
(T -M50)  from unexpected 
adjustments .  This pipe cover is 
fixed to  the bottom of the  water 
heater , which  hides the  plumbing 
and improves  the visual aspects 
of the whole installation  for the 
water heater . 
 
7. Sidewall vent terminator (Hood) and Wall thimble: 
 
T hey are used when venting out through the wall.  These terminations are special 
stainless steel vents for gas applications and are UL listed as Categoly ll, lll and lV.  
For different wall thickness, there are two ranges of lengths availab le.  (Refer to the 
NovaVent brochure for details.)  Install these vent terminations in accordance  
  with their installation instructions   
and any applicable local codes.  
Part # Covering wall thickness 
9008347005 Wall Thimble 4”-7” 
9008348005 Wall Thimble 5”-10” 
9008197005 Terminator Hood 
 Terminator Hood 
Wall Thimble 
  
						

							 - 44 - 
 COMPONENTS DIAGRAM 
Computer board assembly 
Case assembly 
The 910 (T-M50) and the 910 ASME (T-M50 
ASME) models  share the same components.  
3
7
6
13
3
11
410
1
12
3
3
3
4
2
4
2
3
5
98
4
718
709
416705
707706
708
704418703
715701
719
113708
702
710712
713
711
714
113
711
113113716
416705
707706
708
704418703709
715701
719
113
720
721714
113
113
717
722�
723
  
						

							 - 45 - 
 
  
Burner assembly 
114
115
116705
113
113
117
707
707
102121
119118
707
707109112
106111
105
113113
104
103108107
113
110
101
114
115
116
113
113
117
707
707
102
121
119118
707
707109112
106111
105
113113
104
103108107
113
110
101
123
124
126
125
3
123
122
120
705
The 910 (T-M50) and the 910 ASME (T-M50 ASME) 
models share the same  components.   
						

							 - 46 - 
Combustion and Exhaust assembly 
Other than Part# 444, Part# 445, Part# 446 and Part# 447, the 
910 (T-M50) and the  910 ASME (T-M50 ASME) models share 
the  same components.  
3132
133
136
135
137
402
401403
404
406
407
408
409
410411
113
412
413414
415
113
416
405
402
401403
404
406
407
408
409
410411
113
412
413414
415
113
416
405
417
133
134
131
128
130
127
129137
113
417
138
139139
138
T-M50 ASME
444
445446446
447
910 ASME (T -M50 ASME)   
						

							 
- 47  - 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 Water way assembly 910 (T-M50) 
910 ASME (T-M50 ASME) 
422419411
419
411
424
406
407
419
411425
427
423
407
406
425
427
411
419
411419
422
411
419411439440
441
442
443
429425421
411419
406407
424429425432
419411
407406430
434
3433425
438437436
435
113
411420
419
427
426
418
420
428
421
419
419
426427
411411
411
419
431
411
418
430
419420
419
411
424
406
407
419
411425
427
448
407
406
425
427
411
419
411
419411439440
441
442
443
429425
421
419
411
406407
424429425451
407406430434
420
411
418
411
449
421419
411
450
418
430
3433425
438437436
435
113
419
411419
422
422
411
419
427
426411
427
426
411
419
419411
419 
						

							 - 48 - 
PARTS LIST 
 
Item#  Description Part# 
910 models T-M50 models 
001 
002 
003  
004  
005 
Case assembly 
Brackets  
Screw M4X10 (w/washer)  
Screw M4X10 (Coated)  
Back guard panel 
319143-265 
319143-012 
319143- 325 
319143- 026 
319143-237 
EM305 
EM335  
EW 001  
EW 002  
EM264 
006 
007 
008  
0 09  
010 
Power supply code assembly 
Junction  box  
Chamber fixing plate  
Rubber bush  
Exhaust fixing plate 
319143-277 
319143-014 
319143- 230 
319143- 334 
319143-236 
EM333 
EKJ64  
EM255  
EX00 B 
EM263 
011 
012  
013 
Front cover 
Air blockage plate  
Screw M4X12 (w/washer) 
319143-262 
319143-246 
319143-025 
EM301 
EM278  
EW 000 
101 
102 
103  
104  
105 
Burner assembly 
Igniter  
Flame rod 
Igniter rod  
Damper 
319143-308 
319143-052 
319143- 035 
319143- 037 
319143-192 
EM445 
EKN74  
EKK0E  
EKK0F  
EKK1P 
106 
107  
1 08  
1 09  
110 
Rod cap 
Burner window  
Rod holder gasket  
Rod holder  
Burner holder gasket 
319143-038 
319143-033 
319143- 034 
319143- 036 
319143-032 
EKN61 
EKK2V  
EKK2W  
EKK32  
EKK0G 
111 
112 
113  
114  
 
115 
High voltage igniter cable 
Pan screw M4X8  
Screw M4X10  
Manifold assembly  with gas valve assembly LP  
Manifold assembly  with gas va lve assembly NA  
Manifold gasket A 
319143-039 
319143-059 
319143- 060 
319143- 263 
319143- 264 
319143-044 
EKK2M 
EW 00D  
EW 003  
EM302  
EM303  
EKK2Y 
116 
117 
118  
119  
120 
Manifold gasket B 
Igniter plate  
Gas connection plate  
Pan screw M4X10  
O-ring P20 NBR (Black) 
319143-045 
319143-051 
319143- 337 
319143- 062 
319143-057 
EKK2K 
EKK1B  
EX00 J 
EW 006  
EK042 
121 
122 
123  
124  
125 
Gas pipe left 
Gas pipe right  
O -ring P18 NBR (Black)  
Gas inlet  
Hex head screw M4x8 
319143-257 
319143-253 
319143- 350 
319143- 250 
319143-063 
EM293 
EM289  
EZP18  
EM 284  
EW 005 
126 
127 
128  
129  
130 
Pan screw M4X6 (w/washer) 
Exhaust connecter  
Exhaust combining box  
Silicon ring  
Exhaust gasket A 
319143-090 
319143-261 
319143- 276 
319143- 206 
319143-238 
EW 00L 
EM300  
EM331  
EKK3G  
EM266 
131 
132 
133  
134  
135 
Exhaust gasket B 
Case beam  
Exhaust auxiliary plate  
Duct  
Duct cover 
319143-239 
319143- 249 
319143- 275 
319143- 260 
319143-258 
EM267 
EM282  
EM330  
EM299  
EM294  
						

							 - 49 - 
 
 
 
Item#   Description Part# 
910 models T-M50 models 
136 
137 
138  
139  
140 
Duct gasket 
Screw M4X10  
Fan damper  
Screw M3X 6 
Freeze protection thermostat 
319143-240 
319143- 060 
319143- 147 
319143- 330 
319143-252 
EM268 
EW 003  
EK270  
EW 00B  
EM286 
401 
402 
403  
404  
405 
Heat exchanger assembly for 910 (T-M50) 
Overheat -cut -off -fuse  
Hi -limit switch  
Screw M3X6  
Output thermistor 
319143-268 
319143-149 
319143- 095 
319143- 087 
319143-096 
EM308 
EK333  
EKN34  
EW 00A  
EKK2T 
406 
407 
408  
409  
411 
Fastener 4-11 
O-ring P4 FKM  
Pipe heater  122  
Heater fixing plate  
O-ring P16 FKM 
319143-097 
319143-082 
319143- 224 
319143- 088 
319143-083 
EKH30 
EZM04  
EKN86  
EKK27  
EZM16 
412 
413 
414  
415  
416 
Pan Screw M4X12 (w/washer) 
Fan motor fixing plate  
Pressure port  
Urethan e tube  
Fan motor 
319143-061 
319143- 229 
319143- 042 
319143- 344 
319143-043 
EW 00H 
EM252  
EKK2D  
EX019  
EKK25 
417 
418 
419  
420  
421 
Fuse fixing plate 18 
Water control valve  
Fastener 16A G 
O -ring P16  FKM  
Flow sensor 
319143-066 
319143- 086 
319143- 077 
319143- 083 
319143-092 
EKK26 
EKH32  
E X01H  
EZM1 6 
EKH33 
422 
423  
424  
425  
426 
Connecting pipe 
Left cold pipe  for 910 (T -M50)  
Inlet thermistor  
Heater 502  
Heater 101 
319143-251 
319143-254 
319143- 085 
319143- 333 
319143-068 
EM285 
EM290  
EKK38  
EX001  
EX002 
427 
428 
429  
430  
431 
Heater fixing plate 16 
Left hot pipe  for 910 ( T -M50)  
Heater fixing plate 20  
Mixing thermistor  
Right hot pipe for 910 (T-M50) 
319143-125 
319143-273 
319143- 124 
319143- 190 
319143-256 
EK031 
EM328  
EKH38  
EKK1A  
EM292 
432 
433 
434  
435  
436 
Right cold pipe for 910 (T-M50) 
Heater plate  
Water i nlet 
Filter plug  
O-ring P25 FKM 
319143-255 
319143-076 
319143- 259 
319143- 070 
319143-071 
EM291 
EX021  
EM295  
EM222  
EZM25 
437 
438 
439  
440  
441 
Water inlet filter 
O-ring JASO#1021 FKM  
Water o utlet 
Screw M4X6  
Heater 117 
319143-072 
319143-073 
319143- 269 
319143- 328 
319143-223 
EX006 
EZN21  
EM309  
EW 009  
EKN67 
442 
443 
444  
445  
446 
Outlet drain plug 
O-ring P6 FKM  
Heat exchanger assembly  for 910 ASME  (T-M50 ASME)  
Connection pipe for 910 ASME  (T -M50 ASME)  
O-ring P18 FKM 
319143-199 
319143-080 
319143- 270 
319143- 271 
319143-349 
EKK2E 
EZM06  
EM323  
EM326  
EZM18  
						

							 - 50 - 
 
 
 
 
 
Item#   Description Part# 
910 models T-M50 models 
447 
448 
449  
450  
451 
Connecting pipe for 910 ASME (T-M50 ASME) 
Left cold pipe  for 910 ASME  (T -M50 ASME)  
Left hot pipe  for 910 ASME  (T -M50 ASME)  
Right hot pipe  for 910 ASME (T -M50 ASME)  
Right cold pipe for 910 ASME (T-M50 ASME) 
319143-278 
319143-310 
319143- 313 
319143- 312 
319143-311 
EM370 
EM456  
EM459  
EM458  
EM457 
701 
702 
703  
704  
705 
Right and left computer board 
Central  computer  board 
PV- FS wire  
Thermistor connecting wire  
Flame rod wire 
319143-266 
319143-267 
319143- 232 
319143- 233 
319143-243 
EM306 
EM307  
EM258  
EM260  
EM271 
706 
707 
708  
709  
710 
Igniter wire 
Gas valve wire  
AC100V wire  
Right and left computer board cover  
Central computer board cover 
319143-231 
319143-248 
319143- 245 
319143- 183 
319143-274 
EM257 
EM280  
EM277  
EKH43  
EM329 
711 
712 
713  
714  
715 
Multi communication wire 
Left communication wire  
Right communication wire  
Remote controller terminal  
Wire Cramp 
319143-247 
319143-234 
319143- 235 
319143- 244 
319143-048 
EM279 
EM261  
EM262  
EM273  
EM167 
716 
717 
718  
719  
720 
Left PCB fixing plate 
Right PCB fixing plate  
Transformer  
Screw M4X12  
Ground fault circuit interrupter 
319143-241 
319143-242 
319143- 127 
319143- 343 
319143-227 
EM269 
EM270  
EM296  
EX013  
EM207 
721 
722 
723 
Screw M3X12 
Surge  b ox  
Surge connecting wire 
319143-331 
319143- 284 
319143-215 
EW 01A 
EM385  
EKK4U