Direct Vent (Dual Pipe ) Piping; T F I M D V F - Goodman GKS9 Installation Instructions Manual

Vertical Termination (Single Pipe)
12" MIN.
TO ROOF OR
HIGHEST
ANTICIPATED
SNOW LEVEL
Alternate Vertical Termination (Single Pipe)
WALL
INSIDE
ELBOW OR
COUPLING
Horizontal Termination (Single Pipe)
12" MIN.
Horizontal Termination (Single Pipe)
Above Highest Anticipated Snow Level
D V (D P
IRECT ENT UAL IPE
The inlet air screens provided in the installation instruction packet
are available for the installer to use in the inlet of the combustion
air pipe to prevent animals from building nests in the combustion
air pipe. Installation of screens, while strongly recommended, is
not required and will not affect performance of the unit.
Direct vent installations require both a combustion air intake and a
vent/flue pipe. The pipes may be run horizontally and exit through
the side of the building or run vertically and exit through the roof of
the building. The pipes may be run through an existing unused
chimney; however, they must extend a minimum of 12 inches above
the top of the chimney. The space between the pipes and the
chimney must be closed with a weather tight, corrosion resistant
flashing. Both the combustion air intake and a vent/flue pipe termi-
nations must be in the same atmospheric pressure zone. Refer to
Section IX, Vent/Flue and Combustion Air Pipe - Termination Lo-
cations or Concentric Vent Termination for specific details on ter-
TEE
12 " Min To
Roof Or
Highest Anticipated
Snow Level
90º
MEDIUM RADIUS
ELBOWS
OUTSIDE
TEE
or
90°ELBOW
TURNED
DOWN
COUPLING
MIN.
12"
FROM
12"
WALL TO GROUND OR
HIGHEST ANTICIPATED
SNOW LEVEL
VENT/FLUE TEE
or
90° ELBOW TURNED
DOWN
) P
IPING
mination construction. For details concerning connection of pipes
to the furnace, refer to the Section IX, Vent/Flue Pipe and Com-
bustion Pipe - Standard Furnace Connections or Alternate Furnace
Connections.
V /F C
ENT LUE AND OMBUSTION
Refer to the following table for applicable length, elbows, and pipe
diameter for construction of the vent/flue and combustion air in-
take pipe systems of a direct vent (dual pipe) installation. The
number of elbows tabulated represents the number of elbows and/
or tees in each (Vent/Flue & Combustion Air Intake) pipe. Elbows
and/or tees used in the terminations must be included when deter-
mining the number of elbows in the piping systems.
If the combustion air intake pipe is to be installed above a finished
ceiling or other area where dripping of condensate will be objec-
tionable, insulation of the combustion air pipe may be required.
Use 1/2" thick closed cell foam insulation such as Armaflex or In-
sultube where required.
Direct Vent (Dual Pipe)
Maximum Allowable Length of Vent/Flue & Combustion
Unit Input Vent/Flue/Air Intake
(Btu) Termination
Standard
045_3
Alternate
Standard
Alternate
070_3
Standard
Alternate
Standard
070_4
Alternate
Standard
090_4
Alternate
Standard
Alternate
090_5
Standard
Alternate
Standard
115_5
Alternate
1) One 90° elbow should be secured to the combustion air intake con-
nection.
2) Minimum requirement for each vent pipe is five (5) feet in length and
one elbow/tee.
3) Tee used in the vent/flue termination must be included when determin-
ing the number of elbows in the piping system.
4) 3" diameter pipe can be used in place of 2" diameter pipe.
5) Increased Clearance Configurations using (2) 45 deg. Long Sweep
elbows should be considered equivalent to one 90 deg. elbow.
V /F C
ENT LUE AND OMBUSTION
The vent/flue and combustion air pipes may terminate vertically,
as through a roof, or horizontally, as through an outside wall.
Vertical pipe terminations should be as shown in the following fig-
ure. Refer to Section IX, Vent/Flue Pipe and Combustion Pipe -
Termination Locations for details concerning location restrictions.
The penetrations through the roof must be sealed tight with proper
flashing such as is used with a plastic plumbing vent.
16
A P L
IR IPE ENGTHS AND
Air Intake Pipe (ft)
Pipe
Number of Elbows
(4)
Size
(in.) 2 3 4 5
2 68 65 62 59 56 53 50
2 55 52 49 46 43 40 37
2 36 33 30 27 24 21 18
2 23 20 17 14 11
3 68 65 62 59 56 53 50
3 55 52 49 46 43 40 37
2 55 52 49 46 43 40 37
2 42 39 36 33 30 27 24
3 68 65 62 59 56 53 50
3 55 52 49 46 43 40 37
2 39 36 33 30 27 24 21
2 26 23 20 17 14 11
3 68 65 62 59 56 53 50
3 55 52 49 46 43 40 37
3 68 65 62 59 56 53 50
3 55 52 49 46 43 40 37
A P T
IR IPE ERMINATIONS
D
IAMETERS
(1)(2)(3)(5)
6 7 8
8 5
8