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

11  Page
Installation
Installation Manual
-Exhaust vent (ABS, PVC, CPVC, or polypropylene vent)-
The Indoor model can be vented with ABS, PVC, CPVC, or polypropylene (temperature rated up to at 
least 149 °F)  Vent material certified to ULC S636 standards is recommended in the USA  In Canada, 
plastic venting must be certified to ULC S636 standards
ItemMaterialUnited States Canada
Exhaust pipe and Fittings Schedule 40 PVC
ANSI/ASTM D1785
   ULC S636 Certified
      Materials Only
PVC-DWV...

12  Page
Installation
Installation Manual
-DIPswitch settings for Vent length-
Vent lengthTwo-pipe and Single pipe
5 to 50 ft.
(DEFAULT)No 6 : ON
No 7 : OFF
51 to 100 ft.No 6 : OFF
No 7 : OFF
OFF
ON12 34 56 78910
OFF
ON1 2 34 56 78910
Vent lengthTwo-pipe
5 to 20 ft.
(DEFAULT)No 6 : ON
No 7 : OFF
21 to 40 ft.No 6 : OFF
No 7 : OFF
41 to 70 ft.No 6 : ON
No 7 : ON
OFF
ON1 2 34 56 78910
OFF
ON1 2 34 56 78910
OFF
ON1 2 34 56 78910
Set DIPswitches shown in the tables...

13  Page
Installation
Installation Manual
-Intake and Exhaust Venting Illustrations-
Typical installations using ABS, PVC, CPVC, or polypropylene vent
2 inch vent installation
For details of the optional items, refer to the Installation manual for each optional item
Single pipe with room-air intake
Termination
Hanger
1.	 Connect	a	3"	 elbow	 directly	 on	the
    intake vent collar of the water heater 
2.	 Connect	a	3"	 x	2"	 reducer	 directly	on
   the exhaust vent collar of the...

14  Page
Installation
Installation Manual
3 inch vent installation
1.	 Connect	a	3"	 elbow	 directly	 on	the
   intake vent collar of the water heater 
2.	 Connect	a	3"	coupling directly on the
    exhaust vent collar of the water heater 
   Make sure the couplings engage 
   the o-rings installed in the intake 
   and exhaust vent collars
3.	 Connect	 a	3"	 straight	 pipe	to
      the coupling
Exhaust vent collar (Female)
3" straight pipe
3" coupling(included)
Intake vent...

15  Page
Installation
Installation Manual
Two-pipe, direct-ventSingle pipe with room-air intake
Terminations
WallHanger
Hanger
Roof
Roof flashing
Fire stop
Termination
WallHanger
Roof flashing
Fire stop
Roof
Refer to pages 17 and 19 for clearance information
Examples of installation of 3 inch & 4 inch vent  

16  Page
Installation
Installation Manual
Vent connections for two-pipe
4" stainless steel vent straight pipe
Exhaust vent collar (Female)Intake vent collar(Female)
4" stainless steel vent straight pipe
Exhaust vent collar (Female)
4" stainless steel vent straight pipe
Intake vent collar(Female)
4" elbow with bird screen
1.	 Connect	a	4"	 stainless	 steel	vent
      straight pipes directly on the
      exhaust vent collar of the
      water heater 
2.	 Connect	a	4"	 elbow...

17  Page
Installation
Installation Manual
-Vent termination clearances-
CanadaUS A
Direct-vent and other 
than Direct-vent
Direct- 
vent
Other than  
Direct-vent
AClearance above grade, veranda, porch, deck, or 
balcony1 foot1 foot1 foot
B Clearance to window or door that may be opened3 feet1 foot 
4 feet from below or 
side opening 1 foot 
from above opening
CClearance to permanently closed window***
D
Vertical clearance to ventilated soffit located above 
the vent terminator within a...

18  Page
Installation
Installation Manual
For multiple sidewall exhaust terminations, an exhaust 
termination must be at least 1 ft (305mm) away from 
another exhaust termination  An exhaust termination 
must also be at least 2 ft (610 mm) away from an inside 
corner (If the adjacent wall is less than 2 ft (610 mm) of 
length, the minimum required distance away from the 
inside corner will be equal to the length of that adjacent 
wall)Exhaust terminationInsidecorner
 1 ft(305...

19  Page
Installation
Installation Manual

Exhaust and/or direct-vent sidewall terminations should 
be at least 2 ft (610 mm) away from an opposite surface/
wall  Do not place the termination directly in front of an 
opening into a building
Intake airExhaust gas
3  ft (914 mm) min.
BA
2 ft (610 mm) min.
Intake air
BB
A
Exhaust
Gas
A:Exhaust terminations must be at least 1 ft (305 mm) away from any obstructions
B:Intake terminations must be at least 1 ft (305 mm) away from any...

20  Page
Installation
Installation Manual
GAS SUPPLY AND GAS PIPE SIZING
-General-
•	The minimum and maximum inlet gas pressures are:
•	Inlet gas pressures that fall outside the range of values listed above may adversely affect the 
performance of the water heater  These pressures are measured when the water heater is in full 
operation
•	Inlet gas pressure must not exceed the above maximum values; gas pressure above the specified range 
will cause dangerous operating conditions and damage to the...