Horizontal Venting Through The Wall; Downward Venting - American Standard UHMB080ACV3VB Series Installer's Manual

HORIZONTAL VENTING THROUGH WALL
IMPORTANT:
The building owner/maintenance provider must keep the area
around the vent clear from snow.
These furnaces may be installed as direct vent (as shipped) or as
non-direct 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. See Figure 29.
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 30 and Tables 11 and 12
for either direct or non-direct 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 build-
ing materials. This can be avoided by using the roof or
DOWNWARD VENTING
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furnace may be in vertical or horizontal configuration.
All horizontal pipes must be sup-
ported at a maximum of 3 foot
intervals
NOTES:
A) Condensate trap for Vent Pipe must be a minimum of 6 inches in height.
B) Condensate trap for Vent and Inlet Pipe must be connected into a condensate drain pump; an open or vented drain; or it can be connected
to the outlet hose of the furnace's condensate trap. Outdoor draining of the furnace and coil condensate is permissible if allowed by
local codes. Caution should be taken to prevent drains from freezing or causing slippery conditions that could lead to personal injury.
Excessive draining of condensate may cause saturated ground conditions that may result in damage to plants.
C) The condensate trap should be primed at initial start up prior to heating season operation.
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, sili-
cone caulk all cracks, seams and joints within 3 feet of
the Vent Terminal.
The vent for this appliance shall not terminate
(1) Over public walkways; or
(2) Near soffit vents or crawl space vents or other areas where
(3) Where condensate vapor could cause damage or could be
Slope 1/4" per ft.
Slope 1/4" per ft.
18-CD30D1-20-EN
Installer's Guide
! CAUTION
s s
condensate or vapor could create a nuisance or hazard or
cause property damage; or
detrimental to the operation of regulators, relief valves, or
other equipment.
6" Min.
DOWNWARD VENT
LENGTH IS LIMITED TO A
MAXIMUM OF
15 EQUIVALENT FEET.
40 Inch
Upflow or
Downflow
Furnace
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