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21
Read these instructions thoroughly and make
sure you understand all steps and procedures
before proceeding with the installation.
Determine the locations for the vent and
combustion air-inlet terminals then make
two (2) holes through the exterior wall to
accommodate the vent and combustion air-inlet
pipes.
• Maintain a minimum horizational distance
of 1 ft. (30.5 cm) between the vent and
combustion air- inlet terminal centerlines.
• Maintain a minimum distance from the
vent and combustion air-inlet terminals of
not less than 1 ft. (30.5 cm) above grade or
average snowfall whichever is greater.
Insert lengths of vent and combustion air-inlet
pipes through the wall as shown.
• Allow sufficient length of pipe to extend
beyond the exterior wall of the building for
attachment of the vent riser assemblies as
shown.
Place the supplied 1/2 in. (1.3 cm) mesh metal
screens inside each terminal fitting.
NOTICE: For cold climates the screens may
be removed.
Connect the vent riser assemblies to the vent
and combustion air-inlet pipes which are
extending out of the building.
• Ensure that the back of the 90° elbows
are flush with the outside wall surface
and that the vent and combustion air-inlet
terminations of the vent risers are parallel
with the outside wall.
IMPORTANT: Remember to include the
additional 90° elbows and vertical height of
vent and combustion air-inlet pipes of the vent
riser when calculating the maximum equivalent
vent and combustion air-inlet system lengths.
The maximum equivalent vent and combustion
air-inlet system lengths must be as specified by
Table 1 or 2.
• The vent and combustion air-inlet
terminations are not included in the
equivalency calculations.
Horizontal Vent and Combustion Air-Inlet Alternate Vent Riser Terminal
Installation
(40, 50, & 65 Gallon Models ONLY)
Alternate Horizontal Vent and Combustion Air-Inlet Terminal Installation
Raise horizontal pipe upwards 1/8 in. per
foot (10 mm per m) min.
Rear of Termination
Flush with Outside
of Wall
Outside of
Building
Inside of
Building
Raise horizontal pipe
upwards 1/8 in. per foot
(10 mm per m) min.
Min 1 ft.
(30.5 cm)
Raise horizontal
pipe upwards 1/8 in.
per foot (10 mm per
m) min.
Optional - Condensate Management
Drain Port*
*See Condensate Management Section for
additional information about optional piping.
2 ft. x 2 ft. (60 cm x 60 cm)
Sheet Metal Shield on Brick or
Masonry Walls
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