Determine the locations for the vent and combustion air-inlet termi-
nals then make two (2) holes through the exterior wall to accommo-
date the vent and combustion air-inlet pipes. Maintain a minimum
distance of 12 in. (30.5 cm) between the vent and combustion air-inlet
terminal centerlines.
Insert lengths of vent and combustion air-inlet pipes through the wall
as shown. Allow sufficient length of pipe to extend beyond the exte-
rior wall of the building for attachment of the vent and combustion
air-inlet terminals.
Place the supplied ½ in. (1.3 cm) mesh metal screens inside each ter-
minal fitting and connect the terminals to the vent and combustion air-
inlet pipes which are extending out of the building. Ensure that the
back of the supplied terminals are flush with the outside wall surface.
Complete the installation of the remainder of the vent system and
attach it to the vent connector fitting on the water heater’s blower
assembly. Horizontal lengths of the vent system must slope down-
ward away from the water heater a minimum of 1/8 in. per foot (10
mm per meter).
Complete the installation of the remainder of the combustion air-inlet
system and attach it to the combustion air-inlet connector fitting on
the water heater’s combustion air-inlet tube assembly. Horizontal
lengths of the combustion air-inlet system must slope downward
away from the water heater a minimum of 1/8 in. per foot (10 mm per
meter).
Support vertical and horizontal lengths of the vent and combustion
air-inlet systems as previously mentioned.
For 75 Gallon Power Direct Vent Models ONLY:
These water heater models are supplied with two (2) vent and com-
bustion air-inlet termination restrictors. These restrictors help the
water heater achieve peak efficiency when the water heater is installed
using 3 in. (7.6 cm) diameter pipe at the minimum equivalent vent
and combustion air-inlet lengths specified in Table 2. The termination
restrictors must be installed in the same location as the supplied vent
and combustion air-intake terminal screens. IMPORTANT: Do not
install the termination restrictors in equivalent vent and/or combus-
tion air-inlet lengths longer than 8 feet (2.44 meters) or on any other
Power Direct Vent model.
Additional Considerations
DO NOT
install the vent terminal under any patio or deck.
To help prevent moisture from freezing on walls and under
eaves, do not locate the vent terminal on the side of a build-
ing with prevailing winter winds.
When terminating the vent and combustion air-inlet pipes
through brick or masonry surfaces, the installation of a rust-
resistant sheet metal backing plates behind the vent and com-
bustion air-inlet terminals are recommended.
DO NOT
locate the vent terminal too close to shrubbery, as
flue gasses may damage them.
Caulk all cracks, seams and joints within six feet (1.83
meters) of the vent and combustion air-inlet terminals.
Insulate vent pipe exposed to cold conditions (attics, crawl
spaces, etc.) with inflammable material to help prevent
moisture from accumulating in the vent pipe.
Support horizontal sections of the vent and combustion
air-inlet pipe every 4 feet (1.22 meters).
DO NOT
rigidly
secure the vent system. Provisions must be made to allow
for expansion and contraction of the vent system.
If soffit vent is too close,
block off and install new vent
at another location
Inside
corner
Caulk
Caulk
Caulk
6 ft. (1.8 m)
Caulk zone
or to edge of window etc.,
starting within 6 ft. (1.8 m)
Rising moisture will
collect under eves
4 ft.'
(1.22 m)
6 ft. (1.8 m)
Caulk
zone
6 ft.
(1.8 m)
Vent
Combustion
Air-Inlet
WARNING
:
Moisture in the flue gas will condense as it
leaves the vent terminal. In cold weather this condensate can
freeze on the exterior wall, under the eaves and on surrounding
objects. Some discoloration to the exterior of the building is to
be expected. However, improper location or installation can
result in severe damage to the structure or exterior finish of the
building
Horizontal Vent and Combustion Air-Inlet Terminal Installation
2' x 2' (60 m x 60 m)
Sheet Metal Shield
on Brick or Masonry
Walls
Outside of
Building
From
Water Heater
Pipe
Terminals
with ½” Mesh
Protective Screen
and Termination
Restrictor Inside.
Note: Termination
Restrictors used on
75 Gallon models
ONLY.
Inside of
Building
Vent and/or combustion air inlet
12 in. (30.5 cm) Min.
Combustion Air-
Inlet Terminal
Exhaust Vent
Terminal
19
Summary of Contents for Power Direct Vent Series
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