18 18-CD19D8-18
Installer’s Guide
BAYAIR30AVENTA
(Sidewall)
;
VENT
COMBUSTION
AIR
VENT
VENT
PLATE
VENT
CAP
12" MINIMUM
TO OVERHANG
MAINTAIN 12" (18" FOR CANADA) MINIMUM
CLEARANCE ABOVE HIGHEST ANTICIPATED
SNOW LEVEL OR GRADE WHICHEVER IS GREATER
SCREWS
(4 req.)
ANCHORS
(4 req.)
7.2"
3.2"
BAYVENT200B
l
CAUTION
!
When the vent pipe is exposed to temperatures below
freezing, i.e., when it passes through unheated spaces, etc.,
the pipe must be insulated with 1/2 inch (22.7 mm) thick
Armaflex-type insulation or equal.
If the space is heated sufficiently to prevent freezing, then
the insulation would not be required. If domestic water
pipes are not protected from freezing then it is assumed the
space meets the condition of a heated space.
HORIZONTAL VENTING THROUGH WALL
These furnaces may be installed as direct vent (as
shipped) or as nondirect vent. Installation must
conform to national, state, and local codes.
The vent & inlet terminals must be located at least 12"
minimum above normally expected snow accumulation level.
Avoid areas where staining or condensate drippage may be
a problem.
Location of the vent/wind terminal should be chosen to meet
the requirements of Figure 39 for either direct or nondirect
vent applications.
PITCH — Venting through the wall must maintain 1/4" per
foot pitched upward to insure that condensate drains back to
the furnace.
FLUE GAS DEGRADATION — The moisture content of
the flue gas may have a detrimental effect on some building
materials. This can be avoided by using the roof or chimney
venting option. When wall venting is used on any surface that
can be affected by this moisture, it is recommended that a
corrosion resistant shield (24 inches square) be used behind
the vent terminal. This shield can be wood, plastic, sheet
metal, etc. Also, silicone caulk all cracks, seams and joints
within 3 feet of the vent terminal.
COMBUSTIBLE MATERIAL WALL
A minimum clearance of 1" to combustible materials must be
maintained when using single wall stainless steel venting.
See Figure 31.
Shield material to be a minimum of 24 gauge stainless or
aluminized sheet metal. Minimum dimensions are 12"x12".
Shield must be fastened to both inside and outside of wall.
Use screws or anchor type fasteners suited to the outside or
inside wall surfaces.
NONCOMBUSTIBLE MATERIAL WALL
The hole through the wall must be large enough to maintain
pitch of vent and properly seal.
Use cement mortar seal on inside and outside of wall. See
Figure 32.
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