American Water Heater Power Flex 40-42K BTU - Manual (Page 10)

10
Vertical Termination
The vertical inlet and exhaust outlet require a return bend
or two medium or long sweep radius 90° elbows to keep
the air inlet and exhaust outlet downward and prevent
entry of rain. Do not include these elbows when calculat-
ing the maximum allowable vent pipe because they have
already been considered in the vent tables. Refer to figure
6 for the proper location of the air inlet with respect to
the exhaust outlet termination. The vertical exhaust outlet
termination is a 2 inch or 3 inch pipe which terminates at
least 12 inches above the inlet air termination.
The air inlet and exhaust outlet terminations must be at
least 12 inches above the roof line or anticipated snow
levels. See figure 6.
NOTE: A rodent screen is available through the Parts
Department for installations where animals may be able to
access the vent system.
Concentric Vent Terminations
Install 3” Concentric vent kit model KGAVT0601CVT, part
number 6910543. See Manufacturer’s instructions for
complete installation or call customer service at 1-800-
456-9805 for assistance. To prevent potential condensate
from collecting in the venting system slope the vent at
a downward pitch of 1/8” per 5ft. away from the water
heater.
INLET/OUTLET VENT TERMINATIONS
Standard Horizontal Termination
The standard horizontal air inlet termination is a 2 inch
or 3 inch pipe which terminates at the exterior wall and
utilizes a coupling to prevent the pipe from being pushed
back into the structure. The standard horizontal exhaust
outlet termination is a 2 inch or 3 inch pipe which termi-
nates 12 inches from the outside wall (see figure 5). The
air inlet must be located with respect to the exhaust outlet
as shown in figure 5. To prevent potential condensate from
collecting in the venting system slope the vent at a down-
ward pitch of 1/8” per 5ft. away from the water heater.
Install the correct size coupling at the outside wall on both
the inlet and exhaust to prevent the terminations from
being pushed inward.
NOTE: A rodent screen is available through the Parts
Department for installations where animals may be able to
access the vent system.
FIGURE 5
Standard Horizontal Termination
FIGURE 6
Vertical Vent Termination
FIGURE 7
Concentric Vent Termination