Goodman GMVM Service Instructions Manual page 21

PRODUCT DESIGN
Vent/Flue Pipe & Combustion Air Pipe
F
AILURE TO FOLLOW THESE INSTRUCTIONS CAN RESULT IN BODILY
. C
INJURY OR DEATH AREFULLY READ AND FOLLOW ALL INSTRUCTIONS
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GIVEN IN THIS SECTION
U
PON COMPLETION OF THE FURNACE INSTALLATION
INSPECT THE ENTIRE FLUE SYSTEM BOTH INSIDE AND OUTSIDE OF THE
FURNACE TO ASSURE IT IS PROPERLY SEALED
SYSTEM CAN RESULT IN SERIOUS PERSONAL INJURY OR DEATH DUE TO
EXPOSURE TO FLUE PRODUCTS
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 path-
way 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 avail-
able "no hub connectors" other than those shipped with this prod-
uct.
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 -D
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 concern-
ing piping size, length, number of elbows, furnace connections,
and terminations.
T ,
O AVOID BODILY INJURY FIRE OR EXPLOSION
MUST BE KEPT AWAY FROM ALL IGNITION SOURCES
,
FLAMES AND EXCESSIVE HEAT
A
VOID BREATHING CEMENT VAPORS OR CONTACT WITH SKIN AND
.
EYES
Two- or three-inch nominal diameter PVC Schedule 40 pipe meet-
ing ASTM D1785, PVC primer meeting ASTM F656, and PVC
solvent cement meeting ASTM D2564 specifications must be
WARNING
WARNING
,
CAREFULLY
. L
EAKS IN THE FLUE
,
INCLUDING CARBON MONOXIDE
/D V
IRECT IRECT ENT
WARNING
,
SOLVENT CEMENTS
( . .,
I E SPARKS
)
AS THEY ARE COMBUSTIBLE LIQUIDS
used. Fittings must be DWV type fittings meeting ASTM D2665
and ASTM D3311. Carefully follow the pipe manufacturer's in-
structions 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
material. PVC primer meeting ASTM F656 and PVC solvent ce-
ment meeting ASTM D2564 specifications must be used. Fit-
tings must be DWV type fittings meeting ASTM D2665 and ASTM
D3311. Carefully follow the manufactures instructions for cutting,
cleaning and solvent cementing of PVC.
M
ATERIALS AND
As an alternative to PVC pipe, primer, solvent cement, and fit-
tings, ABS materials which are in compliance with the following
specifications 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 manufacturers' instructions for cutting,
cleaning, and solvent cementing PVC and/or ABS.
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
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
sagging, joint separation, and/or detachment from the furnace.
Horizontal 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.
,
OPEN
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/
OR
J M
OINING ETHODS
C A P
LUE AND OMBUSTION IR
PREFERRED
P
IPING RACTICES
21