Vent/Flue Pipe & Combustion Air Pipe; General; Dual Certification : Non -Direct /Direct Vent; Materials And Joining Methods - Goodman GMV9 Installation & Operating Instructions Manual

High altitude installations may require both a pressure switch and an
orifice change. These changes are necessary to compensate for
the natural reduction in the density of both the gas fuel and the com-
bustion air at higher altitude.
For installations above 7000 feet, please refer to your distributor for
required kit(s).
Gas Altitude Kit Orifice
Natural None #43
0-7000
Propane #55
LPTK09
NOTE: In Canada, gas furnaces are only certified to 4500 feet.
Contact an distributor for a tabular listing of appropriate
manufacturer's kits for propane gas and/or high altitude installations.
The indicated kits must be used to insure safe and proper furnace
operation. All conversions must be performed by a qualified installer,
or service agency.
IX. VENT/FL IX. VENT/FL IX. VENT/FL IX. VENT/FL IX. VENT/FLUE PIPE & CO UE PIPE & COMBUSTI UE PIPE & CO UE PIPE & CO UE PIPE & CO
G
ENERAL
F
AILURE TO FOLLOW THESE INSTRUCTIONS CAN RESULT IN BODILY INJURY OR
C
DEATH. AREFULLY READ AND FOLLOW ALL INSTRUCTIONS GIVEN IN THIS
SECTION.
U
PON COMPLETION OF THE FURNACE INSTALLATION, CAREFULLY INSPECT THE
ENTIRE FLUE SYSTEM BOTH INSIDE AND OUTSIDE THE FURNACE TO ASSURE IT
L
IS PROPERLY SEALED. EAKS IN THE FLUE SYSTEM CAN RESULT IN SERIOUS
PERSONAL INJURY OR DEATH DUE TO EXPOSURE TO FLUE PRODUCTS,
INCLUDING CARBON MONOXIDE.
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. Be-
cause of the relatively low flue gas temperature and water conden-
sation 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 connectors"
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 connec-
tors are compatible with furnace flue products. Additionally, it is the
responsibility of the installer to ensure that all piping and connec-
tions 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 in-
take pipe. Refer to the appropriate section for details concerning
piping size, length, number of elbows, furnace connections, and ter-
minations.
IO-243
Manifold Pressure
Pressure
Switch Change
High Stage Low Stage
3.5" w.c. 1.9" w.c.
10.0" w.c. 6.0" w.c.
MBUSTI MBUSTI MBUSTIO O O O O N AIR PIPE MBUSTI N AIR PIPE N AIR PIPE N AIR PIPE N AIR PIPE
WARNING
WARNING
-D /D V
IRECT IRECT ENT
M
ATERIALS AND
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.
None
Two- or three-inch nominal diameter PVC Schedule 40 pipe meet-
None
ing ASTM D1785, PVC primer meeting ASTM F656, and PVC sol-
vent cement meeting ASTM D2564 specifications must be used.
Fittings 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.
As an alternative to PVC pipe, primer, solvent cement, and fittings,
ABS materials which are in compliance with the following specifica-
tions may be used. Two-or-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 manufac-
turers' instructions for cutting, cleaning, and solvent cementing PVC
and/or ABS.
All 90° elbows must be medium radius (1/4 bend DWV) or long ra-
dius (Long sweep 1/4 bend DWV) types conforming to ASTM D3311.
A medium radius (1/4 bend DWV) elbow measures 3 1/16" mini-
mum 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
Adhere to these instructions to ensure safe and proper furnace per-
formance. The length, diameter, and number of elbows of the vent/
flue pipe and combustion air pipe (when applicable) affects the per-
formance 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 feet
and must maintain a 1/4 inch per foot downward slope, back to-
wards 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, particu-
lar 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 freezing
inside the vent/flue pipe and/or at the vent/flue pipe termination. All
vent/flue piping exposed to freezing temperatures below 35°F for
extended periods of time must 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) must
be insulated with 1/2" thick closed cell foam. Inspect piping for
leaks prior to installing insulation.
T L
ERMINATION
NOTES: Refer to Section IV, Location Requirements and
Considerations for combustion air contaminant restrictions.
The following bullets and diagram describe the restrictions concern-
ing the appropriate location of vent/flue pipe and combustion air in-
take pipe (when applicable) terminations. Refer to Non-Direct Vent
(Single Pipe) Piping and Direct Vent (Dual Pipe) Piping located in
this section for specific details on termination construction.
12
J M
OINING ETHODS
WARNING
C A
LUE AND OMBUSTION IR
OCATIONS
A
VOID BREATHING
P P
IPING RACTICES
6/04