Dual Certification : Non -Direct /Direct Vent; Materials And Joining Methods; Proper Vent /Flue And Combustion Air Piping Practices; Termination Locations - Goodman GKS9 Installation Instructions Manual

A condensing gas furnace achieves its high level of efficiency by
extracting almost all of the heat from the products of combustion
and cooling them to the point where condensation takes place.
Because of the relatively low flue gas temperature and water con-
densation requirements, PVC pipe is used as venting material.
This furnace must not be connected to Type B, BW, or L vent or vent
connector, and must not be vented into any portion of a factory built
or masonry chimney except when used as a pathway for PVC as
described later in this section. Never common vent this appliance
with another appliance or use a vent which is used by a solid fuel
appliance. Do not use commercially available "no hub connec-
tors" other than those shipped with this product.
It is the responsibility of the installer to follow the manufacturers'
recommendations and to verify that all vent/flue piping and con-
nectors are compatible with furnace flue products. Additionally, it
is the responsibility of the installer to ensure that all piping and
connections possess adequate structural integrity and support to
prevent flue pipe separation, shifting, or sagging during furnace
operation.
D C : N
UAL ERTIFICATION ON
This furnace is dual certified and may be installed as a non-direct
vent (single pipe) or direct vent (dual pipe) appliance. A non-direct
vent installation requires only a vent/flue pipe, while a direct vent
installation requires both a vent/flue pipe and a combustion air
intake pipe. Refer to the appropriate section for details concerning
piping size, length, number of elbows, furnace connections, and
terminations.
M J M
ATERIALS AND OINING
T
O AVOID BODILY INJURY, FIRE OR EXPLOSION, SOLVENT CEMENTS MUST BE
KEPT AWAY FROM ALL IGNITION SOURCES (I.E., SPARKS, OPEN FLAMES, AND
EXCESSIVE HEAT) AS THEY ARE COMBUSTIBLE LIQUIDS.
CEMENT VAPORS OR CONTACT WITH SKIN AND/OR EYES.
Two-three-inch nominal diameter PVC Schedule 40 pipe meeting
ASTM D1785, PVC primer meeting ASTM F656, and PVC solvent
cement meeting ASTM D2564 specifications must be used. Fit-
tings must be DWV type fittings meeting ASTM D2665 and ASTM
D3311. Carefully follow the manufacturer's instructions for cutting,
cleaning, and solvent cementing of PVC.
The use of Schedule 40 PVC or ABS cellular core (Foam Core)
plastic pipe is also acceptable as a flue/vent and intake pipe ma-
terial. PVC primer meeting ASTM F656 and PVC solvent cement
meeting ASTM D2564 specifications must be used. Fittings must
be DWV type fittings meeting ASTM D2665 and ASTM D3311. Care-
fully follow the manufactures instructions for cutting, cleaning and
solvent cementing of PVC.
For Canadian installations; all PVC pipe, fittings and joining mate-
rials must be UL S636 listed.
As an alternative to PVC pipe, primer, solvent cement, and fittings,
ABS materials which are in compliance with the following specifi-
cations may be used. Two-three-inch ABS Schedule 40 pipe must
meet ASTM D1527 and, if used in Canada, must be CSA listed.
Solvent cement for ABS to ABS joints must meet ASTM D2235 and,
if used in Canada, must be CSA listed. The solvent cement for the
PVC to ABS transition joint must meet ASTM D3138. Fittings must
be DWV type fittings meeting ASTM D2661 and ASTM D3311 and, if
used in Canada, must be CSA listed. Carefully follow the pipe
manufacturers' instructions for cutting, cleaning, and solvent ce-
menting PVC and/or ABS.
-D /D V
IRECT IRECT ENT
ETHODS
WARNING
A
VOID BREATHING
All 90° elbows must be medium radius (1/4 bend DWV) or long
radius (Long sweep 1/4 bend DWV) types conforming to ASTM
D3311. A medium radius (1/4 bend DWV) elbow measures 3 1/
16" minimum from the plane of one opening to the centerline of the
other opening for 2" diameter pipe, and 4 9/16" minimum for 3"
pipe.
P V /F
ROPER ENT LUE AND
Adhere to these instructions to ensure safe and proper furnace
performance. The length, diameter, and number of elbows of the
vent/flue pipe and combustion air pipe (when applicable) affects
the performance of the furnace and must be carefully sized. All
piping must be installed in accordance with local codes and these
instructions.
Piping must be adequately secured and supported to prohibit sag-
ging, joint separation, and/or detachment from the furnace. Hori-
zontal runs of vent/flue piping must be supported every three to five
feet and must maintain a 1/4 inch per foot downward slope, back
towards the furnace, to properly return condensate to the furnace's
drain system. Allowances should be made for minor expansion
and contraction due to temperature variations. For this reason,
particular care must be taken to secure piping when a long run is
followed by a short offset of less than 40 inches.
Precautions should be taken to prevent condensate from freez-
ing inside the vent/flue pipe and/or at the vent/flue pipe termina-
tion. It is our recommendation that all vent/flue piping exposed to
temperatures below 35°F for extended periods of time should be
insulated with 1/2" thick closed cell foam. Also all vent/flue piping
exposed outdoors in excess of the terminations shown in this
manual (or in unheated areas) should be insulated with 1/2" thick
closed cell foam. Inspect piping for leaks prior to installing insu-
lation.
T L
ERMINATION OCATIONS
NOTES: Refer to Section IV, Location Requirements and
Considerations for combustion air contaminant restrictions.
The following bullets and diagram describe the restrictions con-
cerning the appropriate location of vent/flue pipe and combustion
air intake pipe (when applicable) terminations. Refer to Non-Di-
rect Vent (Single Pipe) Piping and Direct Vent (Dual Pipe) Piping
located in this section for specific details on termination construc-
tion.
• All terminations (flue and/or intake) must be located at
least 12 inches above ground level or the anticipated
snow level.
• Vent terminations (non-direct and direct vent) must
terminate at least 3 feet above any forced air inlet located
within 10 feet.
NOTE: This provision does not apply to the combustion
air intake termination of a direct vent application.
• The vent termination of a non-direct vent application must
terminate at least 4 feet below, 4 feet horizontally from, or
1 foot above any door, window, or gravity air inlet into any
building.
• The vent termination of a direct vent application must
terminate at least 12 inches from any opening through
which flue gases may enter a building (door, window, or
gravity air inlet).
• The vent termination of vent pipe run vertically through a
roof must terminate at least 12 inches above the roof line
(or the anticipated snow level) and be at least 12 inches
from any vertical wall (including any anticipated snow
build up).
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C A P P
OMBUSTION IR IPING RACTICES