American Water Heater High Efficiency Commercial Gas HCG Series AHCG3 119T 300 THRU AHCG3 119T 500 Series 200 201 User Manual

31
Four Concentric Terminations
1. When installing four concentric terminations through a roof or 
through  a  sidewall  in  close  proximity  they  may  be  arranged 
into stacked rows of two as shown in Figure 30 or lateral rows 
of two as shown in Figure 31.
2.  Four is the maximum number of concentric terminations that 
may  be  installed  in  a  group  where  all  terminations  are  in 
close proximity as shown in Figure 30.
A
A
A = 0 - 2 INCHES (0 - 5 cm)
CLOSE PROXIMITY
CONCENTRIC
TERMINA TION...

32
SIDEWALL
ROOF
Figure 34
Eight Concentric Terminations
Eight  concentric  terminations  may  be  installed  in  two  stacked 
groups  of  four,  in  close  proximity,  as  shown  in  Figure  35.  See 
Figure 32 on page 31 for detailed information on clearances. 
Lateral groups of four as shown in Figure 31 on page 31 may be 
a  more  convenient  installation  arrangement  for  multiple  groups 
depending on available space.
SIDEW ALL
ROOF
Figure 35 
MULTIPLE CONCENTRIC TERMINATION ARRANGEMENTS
The...

33
LOW PROFILE VENT INSTALLATION
This water heater is certified for sidewall direct venting with IPEX 
System  636  Low  Profile  Vent  Kit.  Follow  instructions  below  for 
proper installations.
All  termination  kits  must  be  located  and  installed  in  accordance 
with  local  building  code  and  CSA  B149.1  Natural  Gas  and 
Propane Installation Code.
1. Once the proper location has been determined, cut 2 holes in 
the wall large enough to accommodate the pipe. Pipe diameters 
and distance...

34
VENTING ARRANGEMENTS
Power Vent VerticalFigure 36
Direct Vent Vertical Figure 38 Power Vent Horizontal
Figure 37
Direct Vent Horizontal Figure 39  

35
VENTING ARRANGEMENTS
Direct Vent Vertical Vent Horizontal Intake
Figure 40
Direct Vent Horizontal Vent Vertical Intake
Figure 41
Direct Vent Vertical Concentric
Figure 42
Direct Vent Horizontal Concentric
Figure 43
Direct Vent Horizontal Low Profile
Figure 44  

36
TERMINATION CLEARANCES SIDEWALL POWER VENT
VXVENT TERMINAL AIR SUPPLY INLETA REA WHERE TERMINAL IS NOT PERMITTED
v
v
A G
V
F
IXE DCLOSED
FIXE DCLOSED
OPERABLE OPERABLEV
C
B
B
B
B
F
BV
V
AJ
V
H
M
X XV
VK
B
E
DL
POWER VENT(using room air for combustion)
EXTERIOR CLEARANCES FOR SIDEW ALL VENT TERMINA TION
Figure 45a
Vent terminal clearances for “Power Vent” installations. Power Vent configurations use room air for combustion.
CANADIAN INSTALLATIONS 1US INSTALLATIONS 2CANADIAN INSTALLATIONS 1US...

37
TERMINATION CLEARANCES SIDEWALL DIRECT VENT
VXVENT TERMINAL AIR SUPPLY INLETA REA WHERE TERMINAL IS NOT PERMITTED
v
v
A G
V
F
IXE DCLOSED
FIXE DCLOSED
OPERABLE OPERABLEV
C
B
B
B
B
F
BV
V
AJ
V
H
M
X XV
VK
B
E
DL
DIRECT VENT(using outdoor air for combustion)
EXTERIOR CLEARANCES FOR SIDEW ALL VENT TERMINA TION
Figure 45b
Vent terminal clearances for “Direct Vent” installations. Direct Vent configurations use outdoor air for combustion.
CANADIAN INSTALLATIONS 1US INSTALLATIONS 2CANADIAN INSTALLATIONS 1US...

38
3. Do not install an additional trap in the condensate drain piping.  
DO NOT remove, modify or alter the factory condensate trap.
INSTALLATION INSTRUCTIONS
1.  Ensure  the  water  heater’s  Enable/Disable  switch  is  in  the 
“Disable” position.
2.  Install  a  1/2  inch  PVC  condensate  drain  line  between  the 
condensate  drain  connection  on  the  Exhaust/Condensate 
Elbow and a suitable building drain. The exhaust elbow has 
a "built in" condensate trap. Do not install  an additional...

39
SUPPLY GAS LINE INSTALLATION
Contact  your  local  gas  utility  company  to  ensure  that  adequate 
gas  service  is  available  and  to  review  applicable  installation 
codes for your area.
Be sure that the gas meter has sufficient capacity to supply the 
rated  gas  input  of  the  water  heater  as  well  as  the  requirements 
of  all  other  gas  fired  equipment  supplied  by  the  meter.  If  the 
gas  meter  is  undersized,  the  gas  company  will  have  to  install  a 
properly sized gas...

40
GAS LINE CONNECTION
1. The water heaters covered by this manual are shipped from 
the  factory  with  a  1  1/2”  supply  gas  connection,  see Table  1 
on page 10. Connect the supply gas line to the water heater's 
24 VAC Gas Valve in accordance with all applicable local and 
national code requirements, see Figure 48.
2.  (A)HCG3  119T500  natural  gas  models  require  a  1  1/2” 
minimum supply gas line. All other water heaters covered by 
this  manual  require  a  1  1/4”  minimum  supply...